Is Refinancing Worth It? How to Run the Numbers

Refinancing means taking out a new loan to pay off an existing one, usually to get a lower interest rate, a different term, or to pull out equity. It makes sense when the savings from the new terms outweigh the cost of doing the deal — and when you keep the loan long enough to come out ahead.

The break-even calculation

The core question is simple: how many months of savings does it take to recover the closing costs?

Suppose you owe $200,000 with 25 years left at 7.5% (a $1,477.98 payment). Refinancing to 6.25% over a fresh 25 years drops the payment to $1,319.34 — a saving of $158.64 a month. With $3,000 in closing costs:

If you will keep the home and loan for at least a couple more years, the refinance pays off. If you might sell or refinance again within 19 months, it does not. Run your own figures in the Refinance Calculator.

The term trap

The example above reset the loan to a new 25-year term, matching the time remaining. If you instead refinance a loan with 25 years left into a new 30-year loan, your payment drops more — but you have added five years of payments. Even at a lower rate, total interest can rise. A lower monthly payment is not the same as saving money. Whenever possible, refinance into a term no longer than what you have left, or keep making the old payment on the new loan.

When refinancing usually makes sense

• Rates have fallen meaningfully since you borrowed (a common rule of thumb is at least 0.5–0.75 points, but the break-even math is what matters).
• Your credit score has improved enough to qualify for a better tier.
• You want to switch from a variable rate to a fixed rate for predictability.
• You can shorten the term — e.g. from 30 years to 15 — and afford the higher payment.
• You are consolidating higher-rate debt into a single lower-rate loan (and will not re-run the balances back up).

When it usually does not

• You plan to sell or move before the break-even point.
• The only benefit is a lower payment from a much longer term.
• Closing costs are steep and cannot be recovered in a reasonable window.
• Your current loan has a prepayment penalty that eats the savings.
• You would be restarting a nearly-paid-off loan, re-loading the early years that are mostly interest.

Costs to include

Application and origination fees, appraisal, title search and title insurance, recording fees, and any points. If these are rolled into the new balance rather than paid upfront, you also pay interest on them — include them in the closing-cost figure for the break-even math either way. For a pure dollar comparison of the old and new loans, the Loan Cost Calculator totals interest plus fees for each.

Written and reviewed by the LoanPayoff.io editorial team, which covers consumer lending and debt repayment. This guide is educational and is not financial advice. Last reviewed: August 2026.