Refinancing often costs money before it saves money. A break-even estimate asks a simple question: how long would a smaller monthly loan payment take to cover the fees?
Start with two numbers
You need the refinance fees and the monthly payment reduction. Compare the principal-and-interest part of both payments. Principal is money paid toward the loan balance. Interest is the cost of borrowing. Keep property taxes and homeowners insurance separate.
For a basic cash-paid-fee example, divide the fees by the monthly principal-and-interest reduction:
Simple cost-recovery months = cash-paid refinance fees ÷ monthly payment reduction.
A made-up example
Suppose the current principal-and-interest payment is $2,000 per month and the new one is $1,800. The difference is $200 per month. If you pay $4,000 in refinance fees out of pocket, $4,000 ÷ $200 = 20 months.
After 12 months, the payment reduction adds up to $2,400, which is still $1,600 below the cash-paid fees. After 20 months, the accumulated reduction equals those fees. These are illustrations, not available loan offers.
This shortcut does not show the whole financial result
A payment includes money that repays debt. Two loans can have different balances after the same number of months. The cheaper payment could leave more debt to repay when you sell or refinance again.
The shortcut also misses changes in mortgage insurance, extra principal payments and the interest charged on financed fees. If the payment does not decrease, there is no positive payment-based recovery period under this formula. Other goals, such as a faster payoff, need a different comparison.
Compare the same future date
Choose how long you expect to keep the loan. For each option, compare payments made through that date plus debt still owed. Add fees paid separately. Fees included in the new balance must be counted through that balance and its payments, rather than added a second time.
This is the approach behind the calculator’s modeled cost comparison. It is an estimate using entered assumptions, without discounting future dollars or calculating tax effects.
Find the fees before relying on the result
Use a lender’s written Loan Estimate to check costs, credits and the new loan amount. The CFPB provides an official explanation of that form. A refundable escrow deposit is not the same thing as a refinance fee.
Compare your scenario in the free calculator, then read the calculation methodology. This educational estimate does not determine whether a refinance is suitable or whether you qualify.