Mortgage Recast Calculator
Estimate a new monthly principal-and-interest payment after a mortgage recast using the remaining balance, lump-sum payment, interest rate and remaining term. Enter your own current figures to produce a transparent preliminary estimate.
Fill in the required fields to see your result.
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The primary result highlights the main payment, ratio, proceeds, cash requirement or investment measure. Supporting outputs expose the intermediate calculations.
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How to Use This Calculator
Enter the requested balances, rates, income, expenses, prices and transaction assumptions. Use values from current documents whenever possible.
Formula & Methodology
The calculator uses standard arithmetic and finance formulas shown through its inputs and outputs. It does not silently add taxes, insurance, fees, appreciation, financing terms or operating assumptions.
Worked example
A recast generally keeps the existing interest rate and remaining maturity while recalculating principal-and-interest payments from the lower balance.
Results are estimates and may exclude lender-specific rules, escrow adjustments, taxes, insurance, legal fees, depreciation, income taxes, variable-rate changes, transaction timing and local requirements.
Educational planning tool only. It is not financial, mortgage, investment, accounting, tax, legal, appraisal or real-estate advice. Verify all figures with qualified professionals and official transaction documents.
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Frequently Asked Questions
- What does the Mortgage Recast Calculator calculate?
- Estimate a new monthly principal-and-interest payment after a mortgage recast using the remaining balance, lump-sum payment, interest rate and remaining term.
- Is this a loan quote, appraisal, tax calculation or investment recommendation?
- No. It is an educational planning tool based only on the values entered. Actual lender, title, tax, insurance and transaction calculations may differ.
- Can I change every financial assumption?
- Yes. Use current loan documents, local fees, property records, operating statements and professional estimates instead of relying on generic defaults.
- Should I verify the result before making a decision?
- Yes. Review the result with the appropriate lender, title or escrow company, tax professional, attorney, accountant, real-estate professional or financial adviser.
Last updated 7/21/2026