Financial planning · Free calculator
Principal Curtailment Calculator
Free principal curtailment calculator for loan scenario planning.
01 / Set your scenario
Your inputs
02 / Review your estimate
Estimated results
Change the inputs to explore a different scenario.
Use the result carefully
Compare estimates with the actual lender disclosure and servicing rules.
Educational estimate only. See the financial disclaimer.
Enter your assumptions to estimate the result. Educational planning only.
Adjust the inputs, then select Calculate to review your scenario.
Method, assumptions and result checks
What this tool covers: Free principal curtailment calculator for loan scenario planning.
Review the calculator’s worked examples, formulas, timing and exclusions in the sections below. Input units and payment frequency matter. A displayed APR is not necessarily the interest rate used by the model. Tax, investment, daily-interest and specialist loan models have different rules.
Interface and accessibility reviewed November 8, 2026. This is not a certification of current rates, tax tables or every financial statement. Verify important results against actual documents.
Monthly loan formulas and worked examples · Build questions for your lender
Free principal curtailment calculator for loan scenario planning.
Learn more about this calculation
Review these related guides before comparing estimates with actual lender terms.
Guides that use this calculator
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