Updated October 22, 2026 · By the LoansFlow Editorial Team

Is Refinancing Worth It? How to Calculate Your Break-Even Point

When rates fall, refinancing feels like free money. It rarely is. A refinance is a new loan with its own costs, and whether it pays off depends on how long you keep the loan. The standard way to decide is a break-even calculation: how many months until the savings cover the cost of refinancing?

The basic formula

Break-even months = Total refinance costs ÷ Monthly payment savings

If you will keep the loan, and the property, longer than the break-even, the refinance saves money. If you expect to sell, move, or refinance again sooner, it probably does not.

A worked example

You borrowed $300,000 at 7.00 percent on a 30-year fixed loan. The payment is $1,995.91. After 24 payments your balance is about $293,685. Rates have fallen and you are offered a new 30-year loan at 6.00 percent.

If you stay more than about two years and one month, you come out ahead. Try your own numbers in the mortgage refinance comparison tool.

What a simple break-even misses

1. You restart the clock

In the example, you had already paid 24 months. A new 30-year loan resets the term, so you owe payments for 360 months again instead of 336. A lower payment can hide that you may pay interest for longer overall. To keep the original payoff date, choose a shorter new term, or keep paying the old amount. The extra goes straight to principal.

2. Rolling costs into the loan

Many lenders offer a "no-cost" refinance. Usually the costs are folded into a higher rate or added to the balance. Either way you pay them with interest, so compare offers by total cost over your expected holding period, not by the sticker closing cost.

3. Cash-out changes the math

If you borrow more than you owe, the savings calculation changes, because part of the new payment funds the cash you received. Evaluate cash-out refinancing against the alternative of a home equity loan or line.

4. Prepayment penalties and points

Commercial loans often carry prepayment penalties or yield maintenance that can wipe out the benefit of a lower rate. Check the existing note before you apply. If you pay discount points to buy down the rate, calculate the break-even on the points separately.

5. Taxes and other timing effects

Mortgage interest may be tax-deductible for some borrowers, which changes the real savings. Talk to a tax professional rather than assuming. Also consider a possible move or a rate environment where waiting could improve the result.

Refinancing a commercial or SBA loan

The same logic applies to business loans, with extra considerations. Appraisals, environmental reports, legal fees, and any prepayment charges are larger. SBA 7(a) loans with terms of 15 years or more have a prepayment fee in the early years, and 504 debenture loans have their own prepayment structure, so read the terms. Business borrowers should also check how a new loan affects their debt service coverage ratio, since a lender will recalculate it.

A refinance checklist

  1. Get a Loan Estimate from at least three lenders on the same day to compare like for like.
  2. List every cost: lender fees, third-party fees, points, prepaid items, and any penalty on the old loan.
  3. Calculate break-even in months, then compare to how long you realistically will keep the loan.
  4. Check the total interest across the remaining and new terms.
  5. Ask whether your rate can be locked and for how long.

For a deeper look at what each fee on the estimate means, read our guide to mortgage closing costs.

Sources and further reading

Related guides

This guide is general information, not financial, tax, or legal advice, and LoansFlow is not a lender. Program rules, limits, and rates change; confirm current terms with your lender and the issuing agency before you act. Examples use round, illustrative numbers.