Mortgage Refinance Break-Even Calculator

How refinance fees create friction

A lower note rate reduces interest, but refinancing is not free. Lender fees, title work, appraisal, and prepaid items create a cash (or financed) hurdle you must climb before “savings” appear in your budget.

FeeFriction’s break-even frame asks a blunt question: how many months of payment reduction does it take to repay the friction you paid to change loans? If you sell, move, or refinance again before that month, the lower payment may never recover the costs.

How to use this calculator

Enter your current and new rates, remaining term (kept equal so the rate change is isolated), and the full economic cost of closing. Include fees rolled into the new balance — those dollars still belong in the hurdle even if you do not write a check at closing.

Read the break-even months against your expected time in the home. Then open the related guides on whether refinancing is worth it and what belongs in closing costs before you treat the output as a decision.

Worked example

Suppose your payment falls by $180 per month after a rate cut, and all-in refinance friction is $4,320 (lender fees, title, appraisal, and prepaid items you would not otherwise pay). Break-even ≈ 4,320 ÷ 180 = 24 months.

If you expect to sell in 18 months, the math says you should not count on capturing the full “savings” story a rate quote advertises. If you expect to stay 7–10 years and the rate cut is durable for your credit and loan type, 24 months may be acceptable — but term extensions, escrow changes, and cash-out uses change the question and need a second pass.

Contrast that with a tiny rate cut that only saves $45 per month with $3,600 in costs: break-even stretches to 80 months. Payment “feels” better immediately; economics do not.

What this tool does not do

It is not a lender quote, credit decision, or advice to refinance. Taxes on points, PMI removal timelines, escrow impound changes, and cash-out spending need separate analysis.

Holding remaining term constant is intentional: it isolates rate savings. Stretching term to lower the payment is a cash-flow choice that can raise lifetime interest even when break-even on the payment delta looks short.

Assumptions

• Same remaining term before and after refinance so rate savings are isolated from term stretch.
• Monthly payment savings are constant; no escrow, insurance, or tax reassessment shocks.
• Closing costs you enter are the full economic hurdle (cash and financed fees).
• No cash-out, subordinate liens, or PMI cancellation modeled automatically.
• Educational estimator only — not a Closing Disclosure or loan offer.

Related guides

Deeper explainers that sit behind this calculator’s math:

• Is Refinancing Worth It? Break-Even Math Without the Sales Pitch — How to decide if a mortgage refinance saves money after closing costs — using months-to-break-even, not hype.
• Refinance Closing Costs Explained (What to Put in Break-Even) — A practical checklist of refinance costs that belong in your break-even months calculation.