Refinance Break-Even Calculator

The refinance break-even calculator is the payback tool in the refinance family. It does not try to value every feature of a new loan. Instead, it asks a focused question: how many months of lower payments are needed to recover the costs paid to refinance? That makes it useful when two offers look similar, when a lender advertises a lower monthly payment, or when you plan to sell the home before the new loan reaches full term.

Use the broader refinance calculator when you need a new loan amount, interest comparison, cash in, or cash out. Use the cash-out refinance calculator when the purpose is tapping home equity. Use this calculator when the key decision is closing costs today versus lower payment later.

Inputs and mechanics

Enter the current monthly payment and new monthly payment using the same scope. If the current payment includes escrow for taxes and insurance but the new quote shows principal and interest only, remove escrow before comparing. Then enter upfront refinance costs. These may include lender fees, points, appraisal charges, title services, recording charges, and other costs triggered by the refinance. Finally, enter how many months you expect to keep the new loan. The APR fields do not drive the break-even formula; the calculator reports the APR change as context so you can see whether the rate moved enough to explain the payment change.

The calculator subtracts the new payment from the current payment. If the result is positive, that amount is monthly savings. It divides costs by monthly savings to estimate the break-even point. It also multiplies monthly savings by your holding period, subtracts costs, and shows the net benefit or loss.

Formula

Monthly savings are:

$\text{monthly savings} = \text{current monthly payment} - \text{new monthly payment}$

Break-even months are:

$\text{break-even months} = \frac{\text{upfront refinance costs}}{\text{monthly savings}}$

Gross savings during the holding period are:

$\text{gross savings while kept} = \text{monthly savings} \times \text{expected months kept}$

Net benefit after costs is:

$\text{net benefit} = \text{gross savings while kept} - \text{upfront refinance costs}$

If monthly savings are zero or negative, the payment-savings break-even is not finite. The calculator therefore labels the primary result as No break-even instead of forcing a meaningless month count.

Worked example matching the default inputs

The default current payment is $1,850 per month and the new payment is $1,625 per month. Upfront costs are $4,500, the expected holding period is 48 months, the old APR is 7.25%, and the new APR is 6.1%.

First calculate monthly savings:

$\text{monthly savings} = \text{1,850 dollars} - \text{1,625 dollars} = \text{225 dollars}$

Then divide the costs by that savings amount:

$\text{break-even months} = \frac{\text{4,500 dollars}}{\text{225 dollars}} = \text{20 months}$

The calculator also measures the 48-month holding period. Gross savings are $10,800 because $225 multiplied by 48 months equals $10,800. Net benefit is $6,300 after subtracting the $4,500 cost. Months after break-even are 28.0 because 48 expected months minus 20 break-even months leaves 28 months of savings after the costs have been recovered. The APR change shown in the details is 1.15 percentage points, from 7.25% to 6.1%.

Eligibility, costs, and disclosures

A good break-even result does not mean a lender must approve the refinance. Approval can depend on credit, income, property value, debt-to-income ratio, loan-to-value ratio, occupancy, and program rules. Costs also differ by lender and loan type. Points may lower the rate but increase the payback period. Escrow deposits may appear at closing even though they are not the same as a lender fee. For mortgages, review the Loan Estimate early and the Closing Disclosure before closing so you can separate true refinance costs from prepaid items and compare them with this calculator.

The mortgage refinance calculator can help when the payment change comes from a new mortgage term, while the debt-to-income calculator checks whether the new payment fits the rest of your obligations. If cash out is involved, run the cash-out refinance calculator as well because new borrowing changes the meaning of savings.

Practical tips

• Use after-tax or tax-deductible effects only if you have confirmed them with a qualified tax adviser; this calculator is pretax.
• Do not assume a no-closing-cost refinance is free. Costs may be built into a higher rate or larger balance.
• If you may move soon, test a conservative holding period.
• Ask the lender for the cost with and without points so you can see whether the lower rate pays back quickly enough.
• Re-run the numbers if the final Closing Disclosure differs from the original quote.

Informational note

This is a cash-payback estimate, not a complete financial recommendation. A borrower may refinance for payment stability, divorce, cosigner release, cash management, or loan-program reasons even when the strict break-even test is weak. Use the result to ask sharper questions, not as a substitute for loan documents.

Sources

• CFPB, Loan Estimate — standardized estimate of loan terms, projected payments, and closing costs.
• CFPB, Closing Disclosure — final disclosure for checking actual costs before closing.
• CFPB, Mortgage resources — consumer guidance for comparing mortgage offers.

Formula references

• Claim: monthlySavings=currentPayment-newPayment; breakEvenMonths=closingCosts/monthlySavings when savings>0; holdingBenefit=monthlySavings×expectedMonths-closingCosts. Source: Regulation Z Appendix J — Annual Percentage Rate Computations, Electronic Code of Federal Regulations / CFPB. Version: 2025 annual edition of 12 CFR Part 1026, Appendix J; accessed 2026-07-09. Jurisdiction: United States federal consumer credit. Accessed 2026-07-09.
• Claim: monthlySavings=currentPayment-newPayment; breakEvenMonths=closingCosts/monthlySavings when savings>0; holdingBenefit=monthlySavings×expectedMonths-closingCosts. Source: Principles of Finance, OpenStax, Rice University (peer-reviewed open textbook). Version: 2022 first edition, ISBN 978-1-951693-54-1. Jurisdiction: Jurisdiction-neutral finance definitions. Accessed 2026-07-09.

These sources support only the claims described above. This calculator is informational and does not replace qualified domain, legal, consumer-credit, payroll, mortgage, pensions, or retirement advice.