Mortgage Refinance Break-Even Calculator

Find how many months of payment savings it takes to recover your refinance closing costs.

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Refinancing a mortgage is a trade: you pay closing costs today in exchange for a lower monthly payment going forward. The break-even point is the month when your accumulated payment savings finally exceed what the refinance cost you — before that month, refinancing has lost you money; after it, every month is genuine savings. This calculator computes your current payment from the remaining balance, current rate, and remaining term; the new payment from the refinance rate and new term; and divides closing costs by the monthly savings to find your break-even point. It also compares total remaining interest on the old loan against total interest on the new one (plus closing costs) so you can see the lifetime effect — an important second check, because a longer new term can lower the monthly payment while quietly increasing total interest. The classic rule of thumb: refinancing makes sense when you'll keep the loan comfortably past the break-even point, typically when the rate drops at least 0.75–1 percentage point and you plan to stay several more years. Closing costs generally run 2–5% of the loan amount and vary by lender and state — get itemized Loan Estimates from multiple lenders before deciding.

How It Works

Both payments are computed with the standard amortization formula M = P × [r(1+r)^n] ÷ [(1+r)^n − 1] on the same balance: the current payment uses your current rate and remaining months, and the new payment uses the refinance rate and the new term. Monthly savings is the difference. Break-even months = closing costs ÷ monthly savings, rounded up. The lifetime comparison sums each loan's total interest to term (payment × months − balance), adds closing costs to the new loan's side, and reports the difference. Two caveats matter. First, resetting a loan with 27 years left to a fresh 30-year term lowers the payment partly by stretching the debt — which can increase total interest even at a lower rate; the lifetime line catches this. Second, this is a payment-savings break-even; it ignores tax effects, PMI removal, and cash-out amounts, and it assumes you don't roll closing costs into the balance (if you do, add them to the loan balance and set closing costs to the remainder). Closing costs and rates vary by lender, region, and credit profile — compare itemized Loan Estimates rather than advertised rates.

Examples

$300,000 at 7% → 5.75%, $6,000 in costs
27 years left on the current loan, refinancing into a fresh 30-year.
Result: Saves about $313/month; break-even in 20 months, and lifetime interest still drops ~$32,000 because the rate cut outweighs the 3-year term reset.
Small rate drop: 6.5% → 6.125%
$250,000 balance, 25 years left, new 30-year term, $5,000 in costs.
Result: The payment falls ~$169/month with break-even at 30 months — but lifetime interest goes UP by ~$45,000 because of the 5-year term reset. A classic case where the monthly saving is misleading.
Refinance into a shorter term: 7.25% → 6% over 15 years
$200,000 balance with 20 years left, taking a 15-year loan, $4,500 in costs.
Result: The payment rises slightly (no break-even on payment), but total interest drops by tens of thousands — the calculator flags this as a non-payment-savings refinance.

Frequently Asked Questions

What is a good break-even period for a refinance?
Most advisors consider under 24 months excellent, 24–36 months reasonable, and beyond 48 months questionable unless you're certain you'll stay in the home. The break-even only pays off if you keep the loan past it — the average US homeowner keeps a mortgage for roughly 7–10 years before moving or refinancing again, so a 5-year break-even leaves little margin. If there's a realistic chance you'll sell within the break-even window, the refinance loses money.
Why can a refinance lower my payment but cost more overall?
Because the payment drops for two entangled reasons: the lower rate (genuine savings) and the term reset (stretching the same debt over more years, which is not savings). Refinancing 27 remaining years into a fresh 30-year term adds three years of payments. At small rate drops, the stretch effect dominates and lifetime interest rises even as the monthly payment falls. Fixes: refinance into a term matching your remaining years (many lenders offer custom terms), or keep the new 30-year loan but pay the old payment amount — the extra goes to principal and effectively preserves your old payoff date at the new rate.
What's included in refinance closing costs?
Typical items: loan origination fees (0.5–1% of the loan), appraisal ($400–700), title search and insurance ($700–2,000), recording fees, credit report, and prepaid items like escrow deposits. The total usually lands between 2% and 5% of the loan amount. 'No-closing-cost' refinances exist but aren't free — the costs are recovered through a higher rate or rolled into the balance. For a true comparison, get an itemized Loan Estimate from each lender; they're standardized documents designed to be compared line by line.
Should I pay points to lower the refinance rate?
A discount point costs 1% of the loan amount and typically lowers the rate by about 0.25%. Points are effectively prepaid interest, so they lengthen your break-even: run this calculator twice — once with the no-points rate and costs, once with the with-points rate and the point cost added to closing costs — and compare break-even months. Points favor borrowers who are confident they'll keep the loan a long time; they hurt anyone likely to move or refinance again within a few years.
Does refinancing hurt my credit?
Modestly and briefly. The lender's hard inquiry costs a few points, and the new account lowers your average account age. Rate-shopping multiple mortgage lenders within a 14–45 day window (depending on the scoring model) counts as a single inquiry, so compare freely. Scores typically recover within a few months of on-time payments on the new loan.

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