Refinance Break-Even Calculator

How long until refinancing actually pays for itself.

Founder & Writer · About the author · Last reviewed 2026-08-25

Break-even is the easy half of this question, and it is the only half most calculators answer. The harder half — whether a lower payment on a restarted term actually costs you more over the life of the loan — is shown here side by side.

Current loan balance

Current interest rate

Months remaining on current loan

324 = 27 years left on an original 30-year loan.

New interest rate

New loan term

Closing costs

Typically 2%–5% of the loan amount.

Roll closing costs into the new loan

Break-even point

—

Keep current loan

Payment—

Months left—

Interest remaining—

Refinance

Payment—

Months—

Interest + costs—

Break-even months = closing costs ÷ monthly payment savings

Enter your numbers to see the math.

This calculator produces estimates based on the assumptions you enter. It is not a loan offer, a pre-qualification, or a guarantee of terms. Your actual rate, payment, and costs are determined by a lender and will differ. Break-even assumes you stay in the home and keep the loan. If you sell or refinance again before the break-even month, the refinance loses money.

Reality Check — what this number leaves out

A refinance is a new loan with new costs, not an adjustment to your existing one. Two numbers decide it, and most people only look at one.

The reset trap

Refinancing into a fresh 30-year term re-amortizes your balance from scratch. A lower rate can still mean more total interest. Check the lifetime comparison above, not just the payment.

You must stay put

Break-even assumes you keep the home and the loan past the break-even month. Sell or refinance again before then and the closing costs are simply lost.

Closing costs are real

Typically 2–5% of the loan. Rolling them in hides them but does not remove them — you then pay interest on them for 30 years.

"No-cost" refinances

There is no such thing. The costs are paid through a higher interest rate instead of cash at closing. Sometimes that is the right choice; it is never free.

Shopping is nearly free

Multiple mortgage inquiries in a 45-day window count as one for scoring purposes. Not shopping costs far more than shopping does.

The two calculations that matter

1. Break-even — "when does this pay for itself?"

break-even months = closing costs ÷ monthly payment savings

Simple and useful. If you will not still hold the loan at the break-even month, stop — the refinance loses money regardless of how attractive the rate looks.

2. Lifetime cost — "is this actually cheaper?"

This is the one that gets skipped. Compare the interest remaining on your current loan against the interest on the new loan plus its closing costs. Refinancing from year 3 of a 30-year loan into a new 30-year loan means the balance gets stretched across 33 total years of payments.

Both numbers are legitimate. A refinance that increases lifetime interest but reduces your monthly payment by $300 may be exactly the right decision if cash flow is the binding constraint in your life. The point is to make that trade knowingly rather than believing you saved money when you deferred it.

The fix, if you want both: refinance to a shorter term, or refinance to 30 years and then use the extra-payment calculator to keep paying your old payment amount. The second approach gives you a lower required payment as a safety valve while still retiring the loan early.

When refinancing is clearly worth it

The rate drop is large and you plan to stay well past break-even.
You are moving from an adjustable rate to a fixed one to remove risk — here the "saving" is insurance, not interest.
You are shortening the term, e.g. 30 years to 15, which usually improves both the rate and the lifetime interest.
You are removing PMI because your equity position has genuinely changed.

And when it usually is not: when you are 20+ years into a loan, or when you expect to move within a few years.

Frequently asked questions

How do you calculate the refinance break-even point?

Divide your total closing costs by your monthly payment savings. If refinancing costs $6,500 and lowers your payment by $260 a month, the break-even is 25 months — you need to keep the loan at least that long for the refinance to be worth doing.

Why does my lifetime interest go up even though my payment went down?

Because refinancing usually restarts the clock. If you are 3 years into a 30-year loan and refinance into a new 30-year loan, you have just re-extended the balance over 30 years again. A lower rate on a longer remaining term can easily produce more total interest despite a smaller monthly payment. The calculator shows both figures so the trade-off is visible.

Is rolling closing costs into the loan a good idea?

It preserves cash today but increases the loan balance, so you pay interest on the closing costs for the life of the loan. It also slightly worsens your loan-to-value ratio. It is a cash-flow convenience, not a saving — the calculator models both options.

Does shopping multiple lenders hurt my credit score?

Not meaningfully. The CFPB states that within a 45-day window, multiple credit checks from mortgage lenders are recorded as a single inquiry, so the impact is the same no matter how many lenders you consult in that period. Scoring models generally treat same-purpose inquiries within 14 to 45 days as one inquiry.

Sources

Request and review multiple Loan Estimates — Consumer Financial Protection Bureau · 2025-07-14 · accessed 2026-08-25 · Source for the 45-day rate-shopping window
What kind of credit inquiry has no effect on my credit score? — Consumer Financial Protection Bureau · 2024-12-31 · accessed 2026-08-25
What are closing costs? — Consumer Financial Protection Bureau · accessed 2026-08-25
Primary Mortgage Market Survey (PMMS) — Freddie Mac · week ending 2026-08-20 · accessed 2026-08-25