Mortgage Points Break-Even Calculator
See whether paying discount points to buy down your mortgage rate is worth it. Compares the upfront cost against the monthly savings to find how many months until you break even.
About this calculator
A mortgage discount point costs 1% of the loan amount upfront in exchange for a lender knocking a fraction of a percentage point off your interest rate for the life of the loan. Whether that trade is worth it comes down to simple arithmetic: this calculator prices the point or points at 1% of the loan per point, computes the standard fully-amortizing monthly payment both with and without the rate reduction, and divides the upfront cost by the monthly savings to find how many months it takes for the lower payments to fully repay what you spent buying the rate down. Before that break-even month, you're behind on a cash-flow basis; after it, every remaining month of the loan is pure savings compared to not buying points.
The decision hinges entirely on how long you actually expect to keep the loan without selling or refinancing — someone confident they'll stay in the home for 15 more years should weigh points very differently than someone who might relocate for a job in three, since paying upfront for a benefit you never live to collect is a straightforward loss. This calculator compares only the two rate-and-point scenarios you enter; it doesn't shop the broader market to check whether a better no-point rate is available elsewhere, which is worth confirming separately before committing.
Financial Disclaimer
This calculator is for educational purposes only and does not constitute financial advice. Results are estimates based on the inputs provided. Consult a qualified financial advisor before making investment or financial planning decisions.
Inputs
Results
Break-even time
61.2months
How to Use This Calculator
- Enter your loan amount and term.
- Enter the number of discount points and the rate with and without them.
- If you'll keep the loan past the break-even month, buying points pays off.
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How the result changes with Rate with points
| Rate with points | Break-even time |
|---|---|
| 2% | 3.8months |
| 7% | -30.1months |
| 13% | -2.1months |
| 18% | -1.1months |
How this is calculated
Worked example, using the default values
- pointsCostloanAmount * points / 100loanAmount * points / 100 = 3000
- paymentWithoutPointsloanAmount * (rateWithoutPoints/100/12) / (1 - (1 + rateWithoutPoints/100/12)^(-(termYears*12)))loanAmount * (rateWithoutPoints/100/12) / (1 - (1 + rateWithoutPoints/100/12)^(-(termYears*12))) = 1896.20407048
- paymentWithPointsloanAmount * (rateWithPoints/100/12) / (1 - (1 + rateWithPoints/100/12)^(-(termYears*12)))loanAmount * (rateWithPoints/100/12) / (1 - (1 + rateWithPoints/100/12)^(-(termYears*12))) = 1847.15160128
- monthlySavingspaymentWithoutPoints - paymentWithPointspaymentWithoutPoints - paymentWithPoints = 49.0524691997
- breakEvenMonthspointsCost / monthlySavingspointsCost / monthlySavings = 61.1590007383
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.
Frequently Asked Questions
What exactly is a mortgage discount point?
One discount point costs 1% of your loan amount, paid to the lender at closing, in exchange for a permanently lower interest rate on the loan — on a $300,000 mortgage, one point costs $3,000. The exact rate reduction per point varies by lender and market conditions, typically somewhere around a quarter of a percentage point, which is why this calculator asks for the actual quoted rates rather than assuming a fixed relationship.
What happens if I sell or refinance before reaching the break-even month?
You come out behind — the upfront cost of the points hasn't yet been recovered through lower monthly payments, so selling or refinancing early effectively wastes the difference between what you paid for the points and the savings you actually collected before the loan ended. This is the single biggest reason to calculate break-even before paying for points rather than after.
Are mortgage points ever a bad idea even if I plan to keep the loan a long time?
They can be if the cash used to buy points would earn a better return invested elsewhere, or if you'd rather keep that cash liquid for emergencies or a larger down payment that avoids mortgage insurance altogether. A long expected holding period makes the interest-rate math favor points, but it doesn't automatically make points the best use of that specific cash on hand.
Does a longer loan term make buying points more or less worthwhile?
Generally more worthwhile on a pure interest-savings basis, since a lower rate compounds its benefit over more months of remaining payments, while the break-even point itself is driven mainly by the size of the monthly savings rather than the total term length. A 30-year loan gives a rate reduction far more time to pay off its own upfront cost than a 15-year loan does.
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