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Interest Calculation Reference

Calculate Pre-Petition Interest in Minutes, Not Hours

10 minutes with CaseMark

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Interest Calculation Reference

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Workflow

Interest Calculation Reference

Overview

CaseMark's Interest Calculation Reference automates the complex process of calculating and validating pre-petition interest for bankruptcy creditor proofs of claim. The tool extracts key financial data from loan documents and payment histories, applies the correct rate source hierarchy, and generates a complete interest worksheet with per diem breakdowns and charge inclusion analysis.

Calculating pre-petition interest for bankruptcy proofs of claim is a painstaking process that requires precise date arithmetic, correct rate source identification, and careful evaluation of which charges can be included. A single error in day-count basis, accrual period, or rate selection can result in claim objections, reduced recoveries, or sanctions—yet attorneys and paralegals routinely perform these calculations manually using spreadsheets.

CaseMark automates the entire pre-petition interest calculation workflow, from extracting principal balances and rates from governing documents to applying the correct day-count basis and rate source priority hierarchy. The AI generates a complete, validated interest worksheet with per diem calculations, charge inclusion analysis, and a built-in checklist—turning hours of manual work into a reliable, reviewable output in minutes.

How it works

  1. 1. Upload your loan documents, payment history, and proof of claim filing

  2. 2. AI extracts principal balances, rates, dates, and fee provisions automatically

  3. 3. CaseMark calculates pre-petition interest, validates rate sources, and audits included charges

  4. 4. Review the complete interest worksheet and export in your preferred format (DOCX, PDF)

What you get

  • Core Input Summary Table

  • Rate Source Priority Analysis

  • Pre-Petition Interest Calculation Worksheet

  • Per Diem and Total Claim Breakdown

  • Charge Inclusion Gate Results

  • Post-Petition Interest Rule Application

  • Validation Checklist

What it handles

  • Automated pre-petition interest calculation with multiple day-count bases (365, 360, 30/360)

  • Rate source priority hierarchy validation across contract, judgment, state, and federal rates

  • Charge inclusion gate analysis for late fees, NSF fees, and attorney fees

  • Post-petition interest rule application by claim type (secured, unsecured, priority)

  • Complete interest worksheet generation with per diem and total claim amounts

  • Built-in validation checklist to catch errors before filing

Required documents

  • Loan or Credit Agreement

    The governing loan, credit, or promissory note documents specifying interest rate, accrual method, and fee provisions

    .pdf, .docx

  • Payment History / Balance Ledger

    Chronological record of payments, principal applications, and outstanding balances

    .pdf, .docx, .xlsx, .csv

  • Proof of Claim or Draft Filing

    The proof of claim being prepared, audited, or objected to, including any attached exhibits

    .pdf, .docx

Supporting documents

  • Judgment or Court Order

    Pre-petition judgment specifying judgment rate, if applicable

    .pdf, .docx

  • Collateral Valuation / Appraisal

    Valuation documentation for secured claims to determine lien status and secured amount

    .pdf, .docx

  • Bankruptcy Petition

    The bankruptcy petition filing showing petition date and case number

    .pdf

Why teams use it

Eliminate manual calculation errors that can lead to claim objections or court sanctions

Save hours of tedious date arithmetic and rate research on every proof of claim

Generate audit-ready interest worksheets that withstand trustee and debtor scrutiny

Quickly identify overcharges or errors in opposing parties' claims to support objections

Questions

What types of bankruptcy claims does this tool support?

CaseMark supports pre-petition interest calculations for secured, unsecured, and priority claims. The tool automatically applies the correct post-petition interest rules based on claim type and handles the rate source priority hierarchy for each.

How does CaseMark determine which interest rate to apply?

CaseMark follows a four-tier rate source priority hierarchy: contract rate first, then judgment rate, state statutory prejudgment rate, and finally the federal rate under §1961 as a fallback. The AI identifies the applicable rate from your uploaded documents and flags any ambiguities for your review.

Can this tool help me object to an opposing party's proof of claim?

Yes. CaseMark can audit an existing proof of claim by recalculating the pre-petition interest independently and identifying discrepancies in rate selection, day-count basis, accrual periods, or improperly included charges. This gives you a documented basis for filing objections.

Does CaseMark handle different day-count conventions?

Absolutely. CaseMark supports actual/365, actual/360, and 30/360 day-count bases. The AI identifies the correct convention from your governing documents and uses verified calendar-day calculations to ensure accuracy.

What charges beyond interest does the tool evaluate?

CaseMark runs a charge inclusion gate that evaluates late fees, NSF fees, attorney fees, and other charges against the governing documents and applicable statutory authorities. Only charges with proper contractual or statutory support are included in the total claim amount.

How accurate are the calculations compared to manual work?

CaseMark uses the same formulas and methodologies that experienced bankruptcy practitioners apply, but eliminates manual arithmetic errors and date-calculation mistakes. Every output includes a validation checklist so you can verify each component before filing.

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