Money & Finance

Refinance Calculator

Estimate monthly savings, closing-cost break-even time and interest difference when refinancing a loan.

Free online toolWorks in your browserNo sign-up required

Refinance Calculator

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Home Affordability, Refinance & Rent vs. Buy

Compare how income, debt, rates, refinancing costs and ownership assumptions affect housing decisions.

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How to use this refinance calculator

Enter the values requested above and select Calculate. Change any input to compare another scenario. The calculation runs locally in your browser and does not require an account.

Formula and method

Compare the payment on the current balance at the old rate and remaining term with the payment on a new loan at the proposed rate and term.

Example

If refinancing saves $180 per month and costs $4,500 upfront, the simple break-even point is about 25 months.

What this calculator is useful for

Estimate monthly savings, closing-cost break-even time and interest difference when refinancing a loan. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.

Lower monthly payments are not the only refinance measure

Compare the old payment on a $240,000 balance at 7% with a new payment at 6.25%, keeping 25 years in both cases and assuming $5,000 in closing costs. Review the reported payment savings against the upfront cost.

What to check: Cash break-even alone is incomplete when a new loan resets the payoff clock. Compare lifetime interest, planned moving date, tax consequences, and whether closing costs are paid or rolled into the balance.

Compare with the Mortgage Payoff calculator when that better matches the question you are trying to answer.

Frequently asked questions

What does the Refinance Calculator calculate?

Estimate monthly savings, closing-cost break-even time and interest difference when refinancing a loan.

How does the Refinance Calculator work?

Compare the payment on the current balance at the old rate and remaining term with the payment on a new loan at the proposed rate and term.

Is the Refinance Calculator free to use?

Yes. ERICH Calculators is free to use and does not require an account.

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Method, assumptions & corrections

See how formulas, sources and limitations are handled across ERICH Calculators.