
461 B.R. 308 (2011)
In re 400 WALNUT ASSOCIATES, L.P., Debtor(s).
400 Walnut Associates, L.P., Plaintiff(s)
v.
4th Walnut Associates, L.P., Ivy Realty LII, LLC, and Ivy Realty Services, LLC, Defendant(s).
Bankruptcy No. 10-16094 SR. Adversary No. 10-0456.
United States Bankruptcy Court, E.D. Pennsylvania.
October 20, 2011.
*310 George M. Conway, Esquire, Philadelphia, PA, Office of the United States Trustee.
Aris J. Karalis, Esquire, Robert W. Seltzer, Esquire, Frank S. Marinas, Esquire, Maschmeyer Karalis, P.C., Philadelphia, PA, for Debtor.
Francis M. Correll, Jr., Esquire, Domenic E. Pacitti, Esquire, Margaret M. Manning, Esquire, Shahan G. Teberian, Esquire, Klehr Harrison Harvey Branzburg LLP, *311 Philadelphia, PA, for 4th Walnut Associates, LP.

OPINION
STEPHEN RASLAVICH, Chief Judge.

Introduction
Before the Court is the Debtor's Objection to Proof of Claim No. 7-3 filed by secured creditor 4th Walnut Associates, L.P. (4th Walnut). The Objection is contained within Count VIII of this adversary proceeding. The Objection is opposed and a trial on the matter was held on July 27, 2011. Thereafter, Memoranda of Law were submitted and the Court took the matter under advisement. For the reasons which follow, the Objection to the claim will be sustained in part and denied in part.[1]

Summary of Holding
Proof of Claim 7-3 will be allowed in the total amount of $12,620,867.57.[2] It consists of the following components:


  Principal             $ 12,069,518.95
  Interest              $    624,484.40
  Late Charges          $     49,458.05
  Less Payments Made    $   (122,593.83)
  ______________________________________
  Total Claim           $ 12,620,867.57


The Proof of Claim
The claim at issue is based on a Multi-Family Note, Mortgage, Assignment of Rents and Security Agreement (Loan Documents). Ex. 4. It was filed in the amount of $15,267,261.27, plus attorneys fees and costs. Id. It includes interest and other charges which are itemized on a separate attached statement. Id. The claim is secured by the Debtor's real property, the apartment building at 4th and Walnut Streets in Philadelphia.[3]Id. (the Property).

History of the Loan
Because much of the Debtor's challenge is based on events which transpired before 4th Walnut held the underlying loan, it is necessary to recount the pertinent factual background.
The claim derives from a 2004 loan made to the Debtor by Independence Community Bank (ICB). Trial Tr. 9. The amount of the loan was $13,125,000 and its purpose was to provide permanent financing for the Debtor's conversion of the Property from an office building to residential apartments. Id. In 2006, Sovereign Bank, N.A., (Sovereign) acquired ICB and with it the Debtor's loan. Id. 10. In November 2009, Sovereign notified the Debtor that it had defaulted under the loan. Ex. 9. In January 2010, Sovereign commenced foreclosure proceedings. Ex. 10. On June 18, 2010, Sovereign sold the loan to 4th Walnut. Ex. 65. On July 2, 2010, 4th Walnut informed the Debtor that it had purchased the loan from Sovereign and declared the Debtor in default. Ex. 13. On July 23, 2010, the Debtor commenced this Chapter 11 case. See Voluntary Petition, Case No. 10-16094.
On December 18, 2010, the Debtor filed an eight count complaint against 4th Walnut.[4]*312 On January 10, 2011, 4th Walnut filed a Motion to Dismiss seven of the eight Counts. On March 31, 2011, the Court granted the Motion in part, dismissing six of the seven challenged counts. Presently before the Court is the sole count (Count VIIIObjection to Claim) for which dismissal was not previously sought.[5]

Basis of the Objection
The Debtor contends that the amount of 4th Walnut's claim is overstated. Specifically, argues the Debtor, the amount of principal debt is inflated, the rate of interest is incorrect, and other charges which were waived are included in the claim. See, generally, Debtor's Brief. 4th Walnut correspondingly maintains that each part of its claim is legitimate. See, generally, 4th Walnut's Brief.

Comparison
Below is a side-by-side comparison of the components of 4th Walnut's claim against what the Debtor says is owed:


                        Proof of Claim         Debtor
  Principal             $13,200,754.35       $11,984,927.52
  Interest              $ 1,344,050.75       $   617,827.07
  Late Charges          $   714,394.71       $    75,708.08
  Prepayment Premium    $     8,061.20
  ____________________________________________________________
  Total                 $15,267,261.01       $12,678,462.67[6]

Burden of Proof
The Third Circuit has explained that where an objection to a claim is contested, the evidentiary burden shifts as the case develops:
The burden of proof for claims brought in the bankruptcy court under 11 U.S.C.A. § 502(a) rests on different parties at different times. Initially, the claimant must allege facts sufficient to support the claim. If averments in his filed claim meet this standard of sufficiency, it is "prima facie" valid. In re Holm, 931 F.2d 620, 623 (9th Cir.1991) (quoting 3 L. King, Collier on Bankruptcy, § 502.02, at 502-22 (15th ed.1991)). In other words, a claim that alleges facts sufficient to support a legal liability to the claimant satisfies the claimant's initial obligation to go forward. The burden of going forward then shifts to the objector to produce evidence sufficient to negate the prima facie validity of the filed claim. It is often said that the objector must produce evidence equal in force to the prima facie case. Id.; see In re Windsor Communications Group, Inc., 45 B.R. 770, 773 (Bankr.E.D.Pa.1985). In practice, the objector must produce evidence which, if believed, would refute at least one of the allegations that is essential to the claim's legal sufficiency. If the objector produces sufficient evidence to negate one or more of the sworn facts in the proof of claim, the burden reverts to the claimant to prove the validity of the claim by a preponderance of the evidence. See In re WHET, Inc., 33 B.R. 424, 437 (Bankr.D.Mass.1983). The burden of persuasion is always on the claimant. [citations omitted]
In re Allegheny Intern., Inc., 954 F.2d 167, 173-74 (3d Cir.1992).

Debtor's Expert
Before proceeding to the merits, the Court must address a threshold issue raised by 4th Walnut. It objects to the *313 admission of certain testimony offered by Stephen Scherf, the Debtor's expert witness. 4th Walnut's Reply Br. 29-35. 4th Walnut maintained that Mr. Scherf lacked the qualifications to testify as to matters on which he opined. 4th Walnut contends that his statements are therefore unreliable. The Court finds these concerns to be exaggerated. Scherf has substantial educational qualifications and professional experience relevant to this controversy. In areas where the Court found Mr. Scherf's testimony to be of some help (e.g., compounding of interest and the default rate) the points were neither particularly complex, nor even disputed by 4th Walnut. It is principally the legality of the charges at issue which has caused disagreement. On points where Mr. Scherf's qualifications may have reached their limit (e.g., prevailing market rates) the testimony was either not relied on exclusively by the Court, or it was supportive of 4th Walnut's position. For example, as to the reasonableness of a 16% default rate, the Court has credited Mr. Scherf's testimony as to present market rates, but it relied on several other factors in reaching its ultimate decision to deny that rate.

Principal Debt
As to the amount of principal debt due on the date of bankruptcy, the parties are more than $1 million apart. Compare Ex. 4 (Proof of Claim) with Ex. 1 (Complaint, ¶ 111).[7] Two factors explain why 4th Walnut's principal balance is so much higher: first, it has compounded unpaid interest into the principal balance while the Debtor has not; second, it has calculated unpaid interest at the higher, default rate of interest (16%) while the Debtor has used the lower, contract rate (5%).
The Debtor does not dispute that the note provides for the addition of unpaid interest to principal.[8] Debtor's Br. 31. Neither does it dispute that the agreement provides for a default rate of interest.[9] What the Debtor disputes is 4th Walnut's right to capitalize interest and to charge default rate interest. As to the compounding of interest, the Debtor argues that because Sovereign never added interest to the principal balance, 4th Walnut qua assignee may not. In other words, Sovereign waived the right to compound. As to default rate interest, the Debtor maintains that the rate is inequitable under the circumstances of this case. Id. 40-52.

Waiver and the Right to Compound
On the issue of compounding, the Debtor's expert witness (Mr. Scherf) testified that Sovereign never compounded interest. Trial Tr. 94; see also Ex. 6 Scherf Expert Rep. 6-7. Mr. Scherf based that conclusion on the Sovereign Bank monthly loan statements and the annual mortgage loan statements. Ex. 6. Scherf Expert Rep. 6. After the loan was purchased from Sovereign by 4th Walnut the latter commenced compounding interest. Id. 7. Moreover, added Mr. Scherf, 4th Walnut not only compounded interest going forward, but it retroactively calculated compound interest for the time period prior to when it owned the loan and simply added that to its claim as well. Id. Debtor objects to the compounding of any interesteither before or prior to when 4th Walnut held the loan insisting that 4th Walnut is bound by Sovereign's decision not to compound. For its *314 part, 4th Walnut admits that it has recalculated the claim as Debtor contends. Significantly, it cites no legal authority whatsoever for this rather extraordinary conduct. It simply explains that it believes the note entitles it to do what it has done. Trial Tr. 102-103

4th Walnut's Limited Right to Compound
A decision by a party not to enforce one or more rights in a contract is not dispositive of the question of whether such right has been waived absolutely. In this case, the note provides that any forbearance by the lender in exercising any right or remedy under the loan documents shall not waive or preclude the exercise of such right. See Ex. 7, Note ¶ 12. For whatever reason, during the 15 months after the Debtor defaulted under the note, Sovereign did not compound unpaid interest. The Debtor reads that to mean that the right to compound interest was waived absolutely. 4th Walnut counters that a waiver has to be intentional to be enforced. 4th Walnut's Reply Br. 8.
Under Pennsylvania law, "waiver is the intentional relinquishment of a known right, claim or privilege." Com. ex rel. Corbett v. Large, 715 A.2d 1226, 1229 (Pa.Cmwlth.1998). To constitute a waiver of a legal right there must be a "clear, unequivocal, and decisive act of the party with knowledge of such right and an evident purpose to surrender it." Kingsly Compression, Inc. v. Mountain V Oil & Gas, Inc., 2010 WL 4929076, at *6 (W.D.Pa.Nov. 30, 2010) A commercial lender such as Sovereign certainly is presumed to be aware of its rights with regard to the accrual of interest. Yet it did not compound interest while it held the note. See Ex. 14-55 (monthly bank statements, Jan. 2007 to July 2010). As assignee, 4th Walnut stands in the shoes of the assignor (Sovereign) and so its rights rise no higher than Sovereign's. See In re Nixon, 400 B.R. 27, 35 (Bankr.E.D.Pa. 2008) (disallowing creditor's claim to default rate interest for period when prior holder did not charge default rate), citing Crawford Cent. School Dist. v. Pennsylvania, 585 Pa. 131, 888 A.2d 616, 619-620 (2005). Because Sovereign waived its right to compound unpaid interest for the time it held the loan, 4th Walnut has no right to reverse that decision. See In re Crystal Properties, Ltd., LP, 268 F.3d 743, 747 (9th Cir.2001) (finding it inequitable to allow present holder to recalculate interest for period when predecessor did not and considering the right to have been waived); Harvest Oaks Drive Assoc., LLC, 2011 WL 124495, at *11 (Bankr.E.D.N.C. Jan. 14, 2011) (following Crystal Properties in disallowing retroactive imposition of charges not claimed by prior holder); and In re Sweet, 369 B.R. 644, 652 (Bankr. D.Colo.2007) (disallowing assignee from retroactively charging default rate interest when prior holder had not). As previously noted, 4th Walnut can point to no decision which expressly upholds this practice, which practice the Court finds to be avaricious and highly improper.[10] 4th Walnut's defense of its position consists only of attempts to distinguish precedents which have rejected it. The Court finds these efforts wholly unpersuasive.
*315 That does not mean, however, that Sovereign's waiver is without limits. Just as it would be inequitable to allow 4th Walnut to reconfigure the amounts due prior to when it bought the loan, it would likewise be unfair to hold that 4th Walnut may not compound interest going forward. The Court cannot draw the conclusion that Sovereign's failure to compound interest was the result of a comprehensive accord with the Debtor, such as might bind successors and assigns. Indeed, one of the enduring mysteries of this case was whatexactlywas agreed upon by the Debtor and Sovereign at a January 2010 meeting during which the parties appear to have attempted a workout of the default under the note. The parties' version of events, as to what Sovereign agreed upon, are sharply at odds. The party in the best position to inform the Court as to what Sovereign intended after the January 2010 meeting is Sovereign itself. For whatever reason, no testimony, nor any statement from Sovereign has ever been made part of the record. The upshot is that the record cannot support a finding that Sovereign bargained away the future right to compound interest. Accordingly, 4th Walnut was at liberty to compound interest after it purchased the note (June 18, 2010), but no earlier than that date.

Default Rate Interest
Having determined that 4th Walnut may compound interest going forward, the Court turns to the question of the interest rate. 4th Walnut's claim for default rate interest is based on an express contract provision. That is not disputed. The Debtor acknowledges that a claim for prepetition interest, if provided for in the parties' agreement, is allowable subject to the equities of the case. Debtor's Br. 39. The equitable benchmarks by which the Debtor believes that Court should be guided are the following:
1. The creditor faces a significant risk that the debt will not be paid;
2. The lower rate of interest payable predefault is shown not to be the prevailing market rate;
3. The difference between the default and the pre-default rates and whether the differential between the two rates is reasonable; and
4. Whether the purpose of the higher interest rate is to compensate the creditor entitled to interest for losses sustained as a result of the fact that it was not paid at maturity, or is simply a disguised attempt to penalize the debtor.
Debtor's Br. 39-40 citing In re Deep River Warehouse, Inc., 2005 WL 1513123, at *3, 2005 Bankr.LEXIS 1251, at *9 (Bankr. M.D.N.C. June 22, 2005).[11] 4th Walnut responds that the Deep River analysis is inapposite for two reasons: first, because the decision is not binding authority in this Circuit; and second, because the context in Deep River involved treatment of a secured creditor's claim under a Chapter 11 plan. See 4th Walnut's Reply Brief, 24.
While the Court agrees that Deep River is not controlling precedent, it disagrees that the context is materially different. This Court itself has had occasion to assess the fairness of a claim for default rate interest in the context of Chapter 11 plan confirmation. See In re LaGuardia Associates, LP, 2006 WL 6601650, 2006 Bankr.LEXIS 4735 (Bankr.E.D.Pa. Sept. *316 1, 2006). This court observed in LaGuardia that at least 3 distinct rules have been applied by courts in dealing with the post-bankruptcy default rate interest claims of oversecured creditors. One line of authority leaves the question to applicable non-bankruptcy law, while another considers it as akin to an administrative expense or "charge" under section 506(b). Id. at *38-39, 2006 Bankr.LEXIS 4735, at 110-111. The third lineand the one adopted by this Court in LaGuardiareasoned that the Bankruptcy Code gives the court the equitable power and duty to examine the circumstances of the claim in each particular case and to consider notions of fairness and equity in determining whether to award default rate interest. LaGuardia, at *38-39, 2006 Bankr.LEXIS 4735, at *111 citing In re Terry Limited Partnership, 27 F.3d 241, 243 (7th Cir.1994). As a practical matter, these considerations are no different from the four factors which the Debtor cites. They involve the risk of default as well as the reasonableness of the default rate; that is, both in terms of the rate per se as well as compared to market rates. One additional factor employed in LaGuardia expands the inquiry by considering the effect of the higher rate on the Debtor's ability to reorganize. That consideration, indirectly, impacts what unsecured creditors might recover on their claims. LaGuardia, at *40, 2006 Bankr.LEXIS 4735, at *115. In sum, this is an equitable analysis which concerns all interested parties in the bankruptcy case.

Risk
The Court notes that a default interest rate provision is commonly included in mortgage transactions. It is intended to cover the additional but unforeseeable costs associated with a defaulting borrower. LaGuardia, at *39, 2006 Bankr.LEXIS 4735, at *112 citing Terry, supra at 244. Where this function is not implicated there is the risk that a default rate may function as a coercive penalty. In such cases, courts have held that it would be inequitable to allow its impact to destroy a debtor's opportunity to reorganize. See, e.g., In re Dixon, 228 B.R. 166, 175 (W.D.Va.1998). Equally, other courts are sensitive to the harm that the higher rate might visit upon other creditors. See, e.g. In re Process Property Corp., 327 B.R. 603, 609 (Bankr. N.D.Tex.2005).
At the outset, the Court observes that the default rate herein clearly does not serve the traditional purpose of compensating a lender for the "additional but unforseen costs associated with a defaulting borrower." That cannot be credibly denied, as the loan was in default when 4th Walnut purchased it. The associated costs would certainly have been factored into the purchase price by a sophisticated investor such as 4th Walnut. Indeed, its purchase price was 72 cents on the dollar. Significantly, 4th Walnut's Chief Investment Officer testified that it expected to earn a substantial profit from its investment, ranging from a low of $3 million to as high as $11 million. Trial Tr. 120-124. Allowing default rate interest, in this instance, would unquestionably confer an enormous windfall on 4th Walnut.
But even assuming the risk of a negative return, 4th Walnut cannot be heard to argue that the contract rate is below market. The Debtor's expert credibly testified that the current mortgage rates for apartment building loans tend to track home mortgage rates. See Ex. 6 Scherf Expert Rep. 9; see also Ex. 69, Scherf Dep. 98. 4th Walnut offered no independent evidence on that score. The record leads the Court to conclude that the subject default rate is excessive. Indeed, the increase from the contract rate (5%) to the default rate (16%) is more than 200%. The default rate bears no rational relationship *317 to the situation in which 4th Walnut finds itself. The default rate appears clearly to be less a means of compensation and more in the way of a penalty.
Moving beyond this, the effect of allowing the default rate has critical ramifications for the Debtor's ability both to reorganize itself and to make a meaningful distribution to other creditors. The Debtor's principal testified credibly that the Debtor cannot confirm a Plan of Reorganization if 4th Walnut's claim to default rate interest is allowed. Trial Tr. 32. This testimony was uncontroverted. Even if it were otherwise, paying the heightened rate would shift substantial funds otherwise available to pay unsecured creditors. Id. 32-33. In short, the inclusion of default rate interest here would foreclose the prospect of a reorganization and, as a corollary, prejudice junior creditors. Accordingly, to the extent that the outstanding principal balance of 4th Walnut's claim includes unpaid interest calculated at the default rate, it will be disallowed.

Calculation of Prepetition Principal Balance
Having determined the extent to which interest may be capitalized, and at what rate, the Court calculates the principal balance of 4th Walnut's claim to be $12,069,518.95 as of the petition date. It arrives at this figure, as follows: both parties' records reflect that in April 2009, the principal balance due was $12,052,490.99. Compare Ex. 42 (Sovereign Bank monthly statement) with Ex. 66, 4th Walnut's accounting. Thereafter, the loan went into default, yet Sovereign neither compounded interest nor charged interest at the default rate. On May 26 and August 4, 2009, the Debtor made two payments of $75,866 to Sovereign, which Sovereign applied consistent with its amortization schedule. See Ex. 43, 46 (monthly statements for June and September 2009); see also Ex. 69 Scherf Dep. 83-84.[12] The Court's ruling, supra, allows 4th Walnut to compound interest only as of the date it purchased the loan (June 18, 2010) and until the petition date (July 23, 2010). That makes 35 days of interest which 4th Walnut may compound. At the contract rate of 5%, this yields $57,591.43.[13] Adding that amount of interest to the principal balance of April 2009 ($12,052,490.99) less principal payments made ($40,563.47) results in a total prepetition outstanding balance of $12,069,518.95:


  Principal as of April 2009               $12,052,490.99
  Less Payments Applied to Principal      ($    40,563.47)
  Principal Debt as of 6/18/10             $12,011,927.52
  Compound Interest 6/18/10 to 7/23/10     $    57,591.43
  _________________________________________________________
  Prepetition Principal Balance            $12,069,518.95


Interest
The second line item of 4th Walnut's claim is for interest in the amount of $1,344,050.76. Before the Court can determine the extent to which interest is to be allowed, an understanding of what it represents is required. The 4th Walnut claim breaks interest down into two general components: interest prior to acceleration and interest after acceleration. The interest which accrued prior to acceleration was compounded and so it is already part of the principal; therefore, it does not appear as a separate line item in the claim. Interest accruing after acceleration is calculated on a simple basis; that is what the $1,344,050.76 represents. See Ex. 66. For *318 the reasons which follow the interest component will be reduced.
The first adjustment will be to the interest rate. The applicable rate will be the contract rate of 5%. The second adjustment affects how the unpaid interest accrues. The claim will accrue interest consistent with the loan's amortization schedule. This accrual will occur until the date Sovereign sold the loan (June 18, 2010). Thereafter, and until the bankruptcy filing (July 23, 2010), interest has already been compounded into principal as discussed above. Thus, the downward adjustments to the 4th Walnut claim for interest consist of a reduced rate of interest and a substantially shortened period of compounding.
Adjusting the claim accordingly, the Court calculates accrued interest in the total amount of $624,484.40. The Court has reached its figure by beginning from the month in which the loan went irretrievably into default: March 2009. See Ex. 40. Over the next 16 months (that is, through July 1, 2010) unpaid interest grew to $644,950.34. See Ex. 41-55.[14] This amount will be reduced by the interest accruing from the date Sovereign sold the loan and until July 1, 2010, ($20,465.94)[15] because it is already included (i.e., compounded) into principal.


  Past Due Interest 7/1/10           $644,950.34
  Less 6/18 to 7/1 Compounded        ($20,465.94)
  _______________________________________________
  Past Due Interest as of 6/18/10    $624,484.40


Late Charges
4th Walnut's claim includes late charges of $714,394.71. With regard to late charges, the note provides;
7. Late Charges. If any monthly installment due hereunder is not received by Lender on or before the 10th day of each month or if any other amount payable under this Note or under the Security Instrument or any other Loan Document is not received by Lender within 10 days after the date such amount is due, counting from and including the date such amount is due, Borrower shall pay to Lender immediately and without demand by Lender, a late charge equal to 5 percent of such monthly installment or other amount due. Borrower acknowledges that its failure to make timely payments will cause Lender to incur additional expenses in serving and processing the loan evidenced by the Note (the Loan), and that it is extremely difficult and impractical to determine those additional expenses. Borrower agrees that the late charge payable pursuant to this Paragraph represents a fair and reasonable estimate, taking into account all circumstances existing on the date of the Note, of the additional expenses Lender will incur by reason of such late payment. The late charge is payable in addition to, and not in lieu of, any interest payable at the Default Rate pursuant to Paragraph 8.
Note, ¶ 7 [emphasis added]. The late charges assessed consist of late charges assessed prior to acceleration plus one late charge calculated on the total accelerated balance:


  Late Charges Prior to Acceleration           $     49,458.05
  Prepayment Penalty                           $    130,655.03
  Principal                                    $ 13,118,620.06
                                                _______________
  Subtotal:                                    $ 13,298,733.15
  5% Late Charge on Subtotal                   $    664,936.66
 ______________________________________________________________
  Total Late Charges                           $    714,394.71

*319 See Ex. 66 4th Walnut Accrued Balance Calc.; see also 4th Walnut's Br. 19.
As to these late charges, the Debtor raises both general and specific objections. The general arguments against late charges are two-fold: first, the Debtor argues that, in allowing late charges, most Court's hold that the assessment of such a charge would be unreasonable when coupled with default interest. Debtor's Br. 41. That argument is moot as a result of the Court's holding that default rate interest will not be allowed. The second argument against late charges relies, yet again, on a theory of waiver. Debtor's expert witness, Scherf, testified that while late charges were periodically reported on the Debtor's account statement, such charges were ultimately waived by Sovereign. Ex. 6, Scherf Expert Rep. 6. As evidence of that fact, the Debtor relies on the annual loan statement for 2010 and an account summary statement that was produced in discovery. Ex. 59-60.
A close review of the annual statements and the loan summary belie this. On the annual statement for 2010 and the loan summary, the next to last line item is a deduction of $76,011.50. It appears under the column heading "Late Charges." To the Debtor, this deduction is evidence of a waiver of those late charges. To the Court, it represents something else. The date of the deduction is June 30, 2010. See Ex. 59 and 60. That is 12 days after the loan was sold. By that date, Sovereign could not have waived the late charges because it no longer owned the loan. What the June 30 entries on the statement and summary appear to be, then, are book-keeping entries zeroing out the loan and all related charges after the sale to 4th Walnut. Indeed, the very nextand, for that matter, lastbookkeeping entry on both the statement and summary is designated "loan payoff" and is in the principal amount of the loan. This, then, is not a waiver of the late charges. It is an accounting entry to reflect that a non-performing loan was sold and that the asset was henceforth off the bank's books.
Corroborating this conclusion are other documents. The monthly account statements reflect late charges up to the week before bankruptcy. Likewise, the November 2009 demand letter expressly includes late charges. All of the evidence demonstrates that Sovereign did not waive its right to late charges. For that reason, the late charges assessed prior to acceleration in the amount of $49,458.05 will be allowed.

Late Charges After Acceleration
Where the Debtor's position is much stronger is as to the single late charge of $664,936.66. That charge constitutes 5% of the total accelerated balance of $13,298,733.15. The Debtor argues that Sovereign Bank never charged a late fee on the total loan balance. See Ex. 69, Scherf Dep. 74:13. 4th Walnut once again argues simply that a late charge on the accelerated loan amount is permitted under the note. 4th Walnut's Reply Br. 19.
The Third Circuit has ruled that a mortgagee cannot impose late charges after accelerating a loan balance, at least in the absence of a specific provision in the mortgage. See Security Mutual Life Ins. Co. of New York v. Contemporary Real Estate Associates, 979 F.2d 329, 331 (3rd Cir. 1992). There, the Third Circuit reasoned that acceleration obligates the mortgagor to pay the entire debt, and therefore eliminates the requirement of monthly installments. Id. The late charges provision in this note is not specific as to any item payable other than each monthly installment. It also includes as subject to a late charge "any other amount payable." Theoretically, an accelerated balance could constitute an "other amount payable." But certainly one should not have to guess. *320 The language, at best, is vague. But even assuming it is sufficiently specific, the charge is still subject to a test for reasonableness. See In re Graboyes, 371 B.R. 113, 123 n. 14 (Bankr.E.D.Pa.2007) 4th Walnut offered no evidence on this point.
To be reasonable, the charge must relate rationally to the purpose which it is intended to serve. Id. The provision for late charges in the note itself recites that it is intended to compensate for the time and expense incurred in administering late loan payments. See Ex. 7, Note ¶ 7. That makes sense: when a payment is late, it cannot be applied in the exact amounts that the amortization schedule allocates for principal and interest. More of that payment must go to pay interest and less to principal. See In re Tolbert, 2011 WL 3734240, at *1 (Bankr.M.D.Ga. Aug. 23, 2011). See also Northwestern Mut. Life Ins. Co. v. Uniondale Realty Associates, 11 Misc.3d 980, 986, 816 N.Y.S.2d 831, 836 (N.Y.Sup.2006) ("Indeed, amortization schedules outline precise interest payments due over the life of the loan.") The later a payment is, a progressively higher amount of the payment pays off the accrued interest and progressively less goes to amortize the principal balance. Id. For a lender in privity with a chronic latepaying borrower, the resources devoted to reconciling the actual payments with the amortization schedule can be significant. Under those circumstances, a late fee charged to each late payment seems fair.
Yet, while even a single late payment effectively creates a new amortization schedule, (see Tolbert, supra. id), the Court is hard pressed to understand how a single late paymenteven one in the amount of roughly $13 millionwould cause a lender to incur related incidental expenses of nearly $665,000. This appears to be just another blatant attempt at overreaching on the part of the claimant. Accordingly, the late charge of $664,936.66, constituting 5% of the unpaid balance will be disallowed. As noted, the claim may, however, include limited late charges in the amount of $49,458.05.

Prepayment Premium
The last component of the claim which the Debtor challenges is the prepayment premium. On the claim itself, that charge is listed in the amount of $8,061.20. The original amount was much larger ($130,655.03) but against it 4th Walnut applied certain prepetition payments of $122,593.83:


  Accelerated Loan Balance            $13,065,503.05
  Prepayment Premium (1%)             $   130,655.03
  Payments Applied                    $  (122,593.83)
  ___________________________________________________
  Net Prepayment Premium              $     8,061.20

See Ex. 66 (column 11, Prepayment Penalty).
The Debtor argues that the lender may not collect a prepayment premium on an amount already paid. It argues that the premium compensates the lender for the interest which will not be repaid where the loan is accelerated. See Debtor's Brief 49-51; see also Ex. 69 Scherf Dep. 88-91; Ex. 6 Scherf Expert Rep. 7. 4th Walnut's response is that the note entitles it to collect a prepayment premium notwithstanding acceleration. 4th Walnut's Reply Br. 20.
4th Walnut is correct that the note provides for a prepayment penalty even in the event of acceleration:
Upon Lender's exercise of any right of acceleration under this Note, Borrower shall pay to Lender, in addition to the entire unpaid principal balance of this Note outstanding at the time of the acceleration, (A) all accrued interest and all other sums due Lender under this Note and the other Loan Documents, and (B) the prepayment premium calculated pursuant to Schedule A.

Ex. 7, Note, ¶ 10(a)(2) (emphasis added). Schedule A to the note provides for a 1 % *321 premium for prepayment which occurs in years 5 through 7 of the loan term. Id., Schedule A. This loan originated in February 2004, defaulted in April 2009, and was accelerated in November 2009. Acceleration occurred within the 5th through 7th years of the loan. Thus, to the extent that a prepayment premium will be allowed, it will be calculated at the 1% rate.
As a general proposition, a lender may not collect a prepayment premium after accelerating a loan balance. The two related rationales for this are that the lender's acceleration precludes a voluntary decision to prepay and that a borrower cannot pre pay that which is already due as a result of acceleration. See, e.g., In re Planvest Equity Income Partners IV, 94 B.R. 644, 645 (Bankr.D.Ariz.1988); Slevin Container Corp. v. Provident Fed. Sav., 98 Ill.App.3d 646, 648, 54 Ill.Dec. 189, 424 N.E.2d 939, 940-941 (Ill.App.1981); In re McMurray, 218 B.R. 867, 874 (Bankr. E.D.Tenn.1998); McCarthy v. Louisiana Timeshare Venture (La.App. 4th Cir.1982) 426 So.2d 1342, 1346; American Fed. Sav. v. Mid-America Service, 329 N.W.2d 124, 125-126 (S.D.1983); Matter of LHD Realty Corp., 726 F.2d 327, 330-331 (7th Cir. 1984). But where there exists an express provision for a prepayment premium notwithstanding acceleration, allowance of the premium has been upheld. See, e.g., First Nat. Bank of Maryland v. PNB, 1989 WL 79789, at *8 (E.D.Pa. July 10, 1989); Eyde v. Empire of America Federal Sav. Bank, 701 F.Supp. 126, 129 (E.D.Mich.1988); In re Schaumburg Hotel Owner Ltd. Partnership, 97 B.R. 943, 954 (Bankr.N.D.Ill.1989); Westmark Commercial Mortgage Fund IV v. Teenform Associates, L.P., 362 N.J.Super. 336, 347, 827 A.2d 1154, 1161 (N.J.Super.2003); Mony Life Insurance Company v. Paramus Parkway Building, Ltd., 364 N.J.Super. 92, 105, 834 A.2d 475, 483 (N.J.Super 2003); CP Holdings, Inc., 332 B.R. 380, 382 (W.D.Mo.2005); AE Hotel Venture, 321 B.R. 209, 218 (Bankr. N.D.Ill.2005); In re Premier Entertainment Biloxi LLC, 445 B.R. 582, 627 (Bankr.S.D.Miss.2010); and In re South Side House, LLC 451 B.R. 248, 269 (Bankr.E.D.N.Y.2011).
Pennsylvania courts have held that a prepayment premium constitutes a liquidated damages provision. See Citicorp Mortgage, Inc. v. Morrisville Hampton Village Realty, L.P., 662 A.2d 1120, 1122, 443 Pa.Super. 595, 599-600 (Pa.Super.1995). Under Pennsylvania law, a liquidated damages provision is enforceable only to the extent that it is reasonable. Finkle v. Gulf & Western Mfg. Co., 744 F.2d 1015, 1021 (3d Cir.1984); Perry v. H & R Block Eastern Enterprises, Inc., 2009 WL 2581708, at *3 (E.D.Pa. Aug. 18, 2009). Where the provision is incommensurate with the amount of loss, it will be considered a penalty and will not be enforced. Id. *4th Walnut, once again, offered no evidence on the point.
Determining if a charge is reasonable requires understanding its purpose. Debtor's expert witness, Scherf, explained that the premium is to make up for the lender's lost profit on the difference between the interest it earns on loans such as the one made in this instance, and the interest paid to its depositors (the "spread"). See Debtor's Br. 50 citing Scherf Dep. 89-91. A recent bankruptcy case from this Circuit explains the purpose behind this type of charge:
The purpose of a prepayment premium is [to] ensure that the lender obtains the benefit of the bargain by protecting it against falling interest rates. A prepayment premium is a type of "charge" and, thus, must be "reasonable." The reasonableness of a prepayment penalty is determined by how accurately it predicts actual losses that will be incurred by the *322 creditor if the obligation is paid before the end of the term. It is the creditor's burden to demonstrate that the prepayment premium is reasonable.
Atrium View, LLC v. Eastern Savings Bank, FSB (In re Atrium View, LLC), 2008 WL 5378293, at *2-3 (Bkrtcy. M.D.Pa., Dec. 24, 2008) (citations omitted)
A reasonable prepayment premium, the Atrium court went on, must approximate actual damages:
A prepayment charge formula must effectively estimate actual damages, otherwise, the charges may operate as either a penalty on the debtor or a windfall to a lender, at the expense of other creditors of the bankruptcy estate. Only a prepayment charge formula which [sic] reasonably measures actual damages will be respected under 506(b).
Id. quoting In re Duralite Truck Body & Container Corp., 153 B.R. 708, 714 (Bankr. D.Md.1993).
The means of determining actual damages is not complicated:
The damage formula is simple and well established. It is the difference in the interest yield between the contract rate and the market rate at the time of prepayment, projected over the term of the loan and then discounted to arrive at present value. Any prepayment charge should be wholly or largely dependent upon such a calculation.
Id. quoting A.J. Lane and Co., Inc. 113 B.R. 821, 829 (Bankr.D.Mass.1990). "If a provision makes no attempt to approximate actual damages, the provision is unreasonable." Id. citing In re Schwegmann Giant Super Markets, 287 B.R. 649, 656-57 (E.D.La.2002).
In this case, 4th Walnut has offered no evidence in support of its claim that it has suffered a loss on the order of $130,000 as a result of the Debtor's default. This is not surprising given the testimony of its lone witness, Chief Investment Officer David G. Archibald. He testified, in detail, as to the profit that 4th Walnut expects to make from this investment. Under the various scenarios outlined by him, profit was not a question of "if," but of "how much." Trial Tr. 120-124. Given that testimony, the Court finds no basis to award a prepayment premium. That part of 4th Walnut's claim will accordingly be disallowed and the prepetition payments applied against it will be offset against late charges and interest.

Conclusion
The Proof of Claim 7-3 of 4th Walnut will be allowed in the amount of $12,620,867.57. The Summary of Holding at the beginning of this Opinion itemizes the three components of the allowed claim.
An appropriate order follows.

ORDER
AND NOW, a trial having been held as to the Debtor's objection to the Proof of Claim 7-3 of 4th Walnut Associates, L.P. at Count VIII of the above-captioned adversary proceeding on July 27, 2011, and after submission of post-trial briefs and replies, it is hereby:
ORDERED, that for the reasons in the foregoing opinion, judgment in Plaintiff's favor and against Defendant, 4th Walnut Associates, L.P. is granted in part and denied in part. Proof of Claim 7-3 is allowed in the aggregate amount of $12,620,867.57, such amount being calculated as of the date this Bankruptcy case was commenced.
NOTES
[1]  As this matter involves an objection to a claim, it is within this Court's core jurisdiction. See 28 U.S.C. § 157(b)(2)(B) (designating as "core," allowance or disallowance of claims against the estate).
[2]  This is the amount of the claim as of the petition date. The Debtor brought forward its calculation of the claim to August 1, 2011. Debtor's Br. 14. In doing so it included post-petition interest and credited post-petition payments. This is premature given that neither party has sought a determination of the value of 4th Walnut's secured claim. Until 4th Walnut's status as an over or under secured creditor is established, the Court's ruling as to 4th Walnut's claim is perforce limited to the date of the bankruptcy filing.
[3]  This a single asset real estate case as defined by § 101(51 B) of the Bankruptcy Code. See Voluntary Petition, Case No. 10-16094
[4]  The Complaint alleged various state common law causes of action, e.g., breach of contract, tortious interest with contract, tortious interference with prospective contract, etc.
[5]  The challenged Count which survived the Dismissal Motion remains extant but has been bifurcated for later disposition so that the matter of liquidating the 4th Walnut indebtedness might be resolved expeditiously.
[6]  Complaint ¶ 112.
[7]  Curiously, 4th Walnut's Answer to the Complaint denies that allegation based upon a lack of sufficient information and not based on contrary evidence. See Answer, ¶¶ 111, 112.
[8]  The note provides that unpaid interest is to accrue to principal. See Note, ¶ 3(c).
[9]  Default rate interest is provided for in ¶ 8 of the note. Schedule B to the note provides for a 16% default rate of interest.
[10]  On this score, the court notes, in particular, that in the Purchase and Assumption Agreement pursuant to which 4th Walnut bought the loan, Sovereign itself represented that the principal debt as of June 18, 2010 was $11,884,309.16. (See Exhibit 65@ ¶ 9(L)). Incredibly, 4th Walnut just disregards this fact. Notwithstanding Sovereign's representation, 4th Walnut argues that the Bank simply got it wrong, and that after it bought the loan 4th Walnut was free to correct the Bank's "mistake" and recalculate the principal debt as described. The Court finds this contention to be completely absurd.
[11]  4th Walnut is correct that the Deep River Court did not rely on this 4 part analysis but only mentioned it as being followed in another jurisdiction. The 4 part analysis is taken from In re W.S. Sheppley & Co., 62 B.R. 271 (Bkrtcy.N.D.Iowa 1986). Because the Court will utilize a similar methodology which it has previously itself employed to determine a claim for default rate interest, the point is immaterial.
[12]  The May 26 payment was allocated $20,239.57 to principal, $50,218.71 to interest and $5,407.72 to taxes. Similarly, the August 4 payment was allocated $20,323.90 to principal, $50,134,38 to interest and $5,407.72 to tax escrow.
[13]  $12,011,927.52 × 0.05 × (35 days/365 days) = $57,591.43
[14]  The statement for June 2010 is not part of the record. The Debtor explained that it was unable to locate it.
[15]  The 2010 statement showed current interest due of $48,803.39. Of that amount, 18 days of interest (June 1 through June 18) would accrue as simple interest. The 13 remaining days of interest accrual for the month are compounded into principal.
