Mortgage Points Calculator
Break-even on buying mortgage points to lower your rate.
Break-even
61 months
new rate 6.25%
Points cost
$6,000.00
Monthly savings
$98.64
New rate
6.25%
AI Breakdown & Smart Takeaway
Plain-English insight on your numbers
Get a personalized explanation of what these results mean — and how to improve them.
How the Mortgage Points Calculator works
The Mortgage Points Calculator helps homebuyers and refinancers determine exactly how long it takes to recoup the upfront cost of buying discount points — and whether doing so makes financial sense for their situation. It's ideal for anyone comparing loan offers or trying to decide whether to pay more at closing in exchange for a lower monthly interest rate.
Mortgage points, also called discount points, are a form of prepaid interest you pay to your lender at closing in exchange for a reduced interest rate on your loan. Each point costs 1% of your total loan amount — so on a $400,000 mortgage, one point costs $4,000. The rate reduction you receive per point varies by lender and market conditions, but a commonly cited rule of thumb is approximately 0.25% per point, though this can range from 0.125% to 0.375%. The calculator takes your loan amount, standard rate, discounted rate, and point cost to show you both your monthly savings and your break-even timeline.
The core mechanic of the calculator is the break-even analysis: it divides your total upfront cost of buying down the rate by the monthly payment savings generated by the lower rate. For example, if you spend $8,000 to buy two points and your monthly payment drops by $100, you break even in 80 months — just under seven years. If you plan to stay in the home or keep the loan beyond that point, buying discount points saves you real money. If you sell, refinance, or pay off the loan before then, you've effectively paid more than necessary.
A critical factor the calculator accounts for is the opportunity cost of the upfront cash. Money spent on points could alternatively be invested or kept as an emergency fund, which is why some versions of this analysis incorporate a rate-of-return assumption on alternative investments. Taxes add another layer: mortgage points are often tax-deductible in the U.S. (subject to IRS rules and whether you itemize deductions), which can shorten the effective break-even period. The calculator lets you factor in your marginal tax rate to generate a more realistic after-tax break-even timeline.
A common mistake buyers make is failing to account for refinancing risk. Many homeowners buy down their rate based on a 30-year horizon but refinance within five years when rates drop — never reaching break-even. Another frequent error is comparing points across lenders without normalizing for the rate differences; a lender offering a lower rate with fewer points may simply have better base pricing. Use the calculator to compare scenarios side-by-side rather than evaluating any single loan offer in isolation, and always input the actual quoted rate and cost figures from your Loan Estimate documents for accurate results.
Formula
1 point = 1% of the loan; break-even = cost / monthly savings
Pro tips
- Get Loan Estimates from at least three lenders and run each scenario through the calculator — rate reductions per point vary significantly by institution and market conditions, and the best nominal rate isn't always the best value.
- If you're confident you'll keep the loan for more than seven to ten years (e.g., a forever home with no refinance plans), buying one to two points is often worth it; if your horizon is shorter, a no-points, no-closing-cost loan structure may actually cost less in total.
- Factor in your tax situation: if you itemize deductions and your points are fully deductible in year one (common for points paid on a home purchase in the U.S.), your real out-of-pocket cost drops immediately, shortening your break-even period.
- Ask your lender for a 'rate sheet' comparison showing multiple rate and point combinations — this lets you input several rows into the calculator and find the optimal point on the rate-cost curve for your specific timeline.
- Avoid buying points if you're stretching to cover the down payment or closing costs; depleting your cash reserves to buy down the rate creates financial risk that outweighs the long-term savings.
Key terms
- Mortgage Points (Discount Points)
- — Prepaid interest paid at closing — each point equals 1% of the loan amount — in exchange for a permanently reduced interest rate on the mortgage.
- Break-Even Point
- — The month at which the cumulative monthly savings from a lower interest rate equals the total upfront cost paid for discount points.
- Buy Down Rate
- — The practice of using upfront cash (points) to reduce the mortgage interest rate below the lender's standard quoted rate.
- Loan Estimate
- — A standardized three-page disclosure document lenders must provide within three business days of application, detailing loan terms, projected payments, and closing costs including points.
- Opportunity Cost
- — The potential return foregone by spending cash on points rather than investing or saving that money elsewhere.
- Origination Points
- — Fees charged by a lender to cover the cost of processing a loan — distinct from discount points, as they do not reduce the interest rate.
