Mortgage Refinance Calculator
Estimate your new payment, monthly savings, break-even time, and interest savings.
Open calculator →Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Variables and units
- T = property tax (annual or monthly depending on input) (currency)
- I = homeowners insurance (annual or monthly depending on input) (currency)
- HOA = homeowners association dues (monthly) (currency)
Sources (authoritative):
- Home — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/ - Finance — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/finance - Mortgage Refinance Calculator — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/mortgage-refinance - FHA Loan Calculator — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/fha-loan - VA Loan Calculator — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/va-loan - Rent vs. Buy Calculator — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/rent-vs-buy
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.