A mortgage refinance replaces your current loan with a new one, ideally at a lower rate. The decision seems straightforward: lower rate = lower payment = better. But refinancing comes with closing costs of 2–5% of the loan amount, and the break-even calculation — how long until savings offset those costs — is what actually determines whether refinancing makes financial sense.

The Break-Even Calculation

Break-Even Months = Closing Costs / Monthly Payment Savings

If refinancing costs $7,000 and saves $220/month, break-even is 32 months (just under 3 years). If you plan to sell or refinance again before month 32, the refi costs you money net.

When Refinancing Makes Clear Sense

• You can lower your rate by 0.75% or more
• You plan to stay in the home at least 2–3 years past the break-even date
• Your credit score has significantly improved since your original loan
• You want to switch from an adjustable-rate to a fixed-rate mortgage before rates rise
• You want to shorten your term (30-year to 15-year) to pay less total interest

When to Skip the Refinance

• Rates have only dropped marginally (under 0.5%)
• You are planning to sell within 2–3 years
• You are far into your loan term — refinancing restarts the amortization clock, meaning early payments again go mostly to interest
• Cash-out refinancing to fund consumer purchases (you are borrowing against your home equity for depreciating goods)

No-Closing-Cost Refinance

Some lenders offer “no-closing-cost” refinances where fees are rolled into the loan balance or covered by a slightly higher interest rate. This removes the break-even concern — useful if you might sell within 5 years — but costs more over the long term because you pay interest on the rolled-in costs, or accept a permanently higher rate.