Mortgage Refinance Break-Even Calculator
Find the exact number of months until your monthly interest savings recover the upfront costs of refinancing. Use this whenever you receive a rate offer lower than your current mortgage rate.
About this calculator
Refinancing replaces your current mortgage with a new one at a lower rate, but closing costs typically run 2–5% of the loan balance. The break-even formula answers: how many months of savings does it take to recoup those costs? The simplified interest-savings model used here calculates the monthly interest reduction as: monthly savings = (currentBalance × currentRate/100/12) − (currentBalance × newRate/100/12). The break-even point in months is then: breakEvenMonths = refinanceCosts / monthly savings. This model isolates the interest component, giving a clean comparison. In practice, if you plan to sell or refinance again before the break-even date, refinancing loses money. If you stay longer, every month after break-even is pure savings.
How to use
Current balance: $320,000. Current rate: 7.50%. New rate: 6.75%. Refinancing costs: $6,400. Monthly interest at 7.50% = $320,000 × 0.0750/12 = $2,000. Monthly interest at 6.75% = $320,000 × 0.0675/12 = $1,800. Monthly savings = $2,000 − $1,800 = $200. Break-even = $6,400 / $200 = 32 months (about 2 years and 8 months). If you plan to stay in the home for at least 3 years, the refinance makes financial sense. Over a remaining 20-year term, total savings after break-even would be (240 − 32) × $200 = $41,600.
Frequently asked questions
How long should I plan to stay in my home to make refinancing worth it?
You need to remain in the home at least until the break-even month, and ideally several years beyond it, to justify the upfront costs. Most financial advisors suggest a minimum holding period of 3–5 years post-refinance to capture meaningful savings. If there is any chance you will sell, relocate, or refinance again within 2 years, the transaction costs will likely outweigh the rate benefit. This calculator gives you a precise break-even month so you can match it against your realistic plans rather than relying on rules of thumb.
What costs should I include when calculating the break-even on a mortgage refinance?
Total refinancing costs include lender origination fees (often 0.5–1% of the loan), appraisal fees ($300–$600), title search and insurance ($500–$1,500), recording fees, prepaid interest, and potentially discount points if you buy down the rate. Some lenders offer no-closing-cost refinances that roll fees into the loan balance or rate, which extends the break-even point. To use this calculator accurately, obtain a Loan Estimate from your lender, which itemizes all closing costs, and enter the total in the refinancing costs field. Ignoring even one fee category can materially underestimate the break-even timeline.
Does the mortgage refinance break-even calculation change if I have only a few years left on my loan?
Yes — refinancing in the final years of a mortgage is rarely beneficial because most of each payment is already principal, leaving little interest to save. The break-even formula divides fixed upfront costs by a monthly savings figure that is based on interest alone; when the remaining balance is low, the savings are small and the break-even stretches out, sometimes beyond the remaining loan term entirely. Additionally, resetting to a new 30-year term in the final years dramatically increases your total interest paid even at a lower rate. This calculator's remaining term field helps you see whether the timeline makes sense for your specific payoff horizon.