The break-even month decides a refinance

Published 2026-09-17 · Last reviewed 2026-09-23

A refinance quote is usually sold on the monthly payment, and the monthly payment is almost always lower. The question nobody at the desk answers is when you get ahead, because the costs paid to close the new loan are a debt you owe yourself before the lower payment starts helping. That date - the break-even month - is the number that separates a refinance that makes sense from one that quietly loses money.

Take a realistic case: $300,000 owing at 6.5 percent with 28 years to run. The engine on this page prices the offer most people are shown, which drops the rate to 5.75 percent over a fresh 30-year term. On paper that looks pure, so the arithmetic behind it is worth spelling out in full.

The lower payment, and what it costs

The refinanced payment is $1,751 a month against the current $1,941 - a saving of $190. With the often-quoted $4,000 of closing costs, that particular loan breaks even after about 22 months, or roughly 2 years. Every payment before that date is only repaying those costs; the loan is not ahead until you have passed it. If you might sell, move or refinance again inside that window, the lower payment never earns its fee back.

The length of the new term is where a refinance hides its real cost. Restarting at 30 years instead of keeping the 28 that remain means the balance is stretched over two extra years of interest. Over the full life of the loan the fresh term costs $-21,934 more than keeping the current loan - even with the lower rate - because the extra months of interest outweigh the lower monthly rate. That is the hidden trade in every payment-focused refinance, and it is why two loans can hold the same rate and differ by tens of thousands of dollars.

Hold the term steady instead. If the offer kept 28 years, the payment would fall to $1,798 - a saving of $143 - and every cent of that is genuine, because it comes from the rate alone rather than from stretching the schedule. Comparing the same remaining term is the only way to see what the rate is really buying; comparing against a fresh 30-year term bakes a longer loan into the pitch.

Where these numbers come from

• The monthly payments use the same amortization steps the refinance calculator uses, so the monthly figures, the totals and the break-even here are exactly what the tool would print for the same inputs.
• Break-even is the standard definition. Closing costs divided by the monthly saving - the same industry rule the calculator's own worked example states. It is a rule of thumb, not a contract, but it is the number worth knowing before any fee is committed.
• What was deliberately left out. No change in the property tax or insurance escrow, no appraisal above the figures used here, and no mortgage insurance, because PMI removal is a separate decision that runs through the mortgage calculator rather than this one.

What this guide does not cover

It is not a quote, and it does not know your actual closing costs, your true remaining balance, or how long you will really stay in the home - and all three change the break-even far more than the rate does. It also says nothing about cash-out refinancing, which trades equity for debt and is a different question, or about a no-closing-cost offer, which usually hides the fee inside a higher rate that this page's method would simply show as a smaller saving. Run your own numbers, then treat the break-even month as a deadline against your plan to stay.

Price your own offer in the Refinance Calculator, see what keeping the same term changes in the Amortization Schedule, or compare the lifetime cost of two loans in the Loan Calculator.

Estimates only - not financial, tax or legal advice. Read the full disclaimer.