Mortgage Rate vs Points Trade-off Calculator
Compare upfront point costs to long-term interest savings
Trade-off Breakdown
How to Use This Tool
Enter your total loan amount, select your loan term (15, 20, or 30 years), and input the base interest rate you qualify for without buying discount points. Add the number of discount points you are considering (each point equals 1% of your loan amount, paid upfront), then input the reduced interest rate you would get after buying those points. Finally, enter how many years you plan to stay in the home. Click Calculate to see a full breakdown of costs and savings.
Use the Reset button to clear all fields and start over. You can copy your results to your clipboard using the Copy Results button after calculation.
Formula and Logic
This calculator uses standard mortgage payment math to compare two loan scenarios:
- Upfront point cost = (Number of points × 0.01) × Total loan amount. Each discount point costs 1% of your loan balance paid at closing.
- Monthly payment = (Loan amount × monthly interest rate × (1 + monthly interest rate)^number of payments) / ((1 + monthly interest rate)^number of payments - 1). Monthly interest rate is annual rate divided by 12, number of payments is loan term in years multiplied by 12.
- Monthly savings = Base monthly payment (no points) minus reduced monthly payment (with points).
- Time to recoup points = Upfront point cost divided by monthly savings, rounded up to the nearest full month.
- Total savings = (Monthly savings × number of months you own the home) minus upfront point cost.
- Net cost if selling early = Upfront point cost minus (monthly savings × number of months owned before selling). If you own the home longer than the recoup period, this becomes a net savings figure.
Practical Notes
Discount points are tax-deductible in many cases, but you should consult a tax professional to confirm eligibility for your specific situation. Points only make sense if you plan to stay in the home long enough to recoup the upfront cost through monthly savings. If you sell or refinance before reaching the recoup period, you will lose money on the points investment. Interest rate reductions per point vary by lender, but typically range from 0.125% to 0.25% per point. Always compare offers from multiple lenders to ensure you are getting a competitive rate reduction for your points. Consider your liquidity: paying points ties up cash at closing that could be used for emergency savings or home repairs.
- Points are only tax-deductible if you use the cash method of accounting and meet IRS ownership and use tests for your primary residence.
- Some lenders may cap the number of points you can buy, usually at 4-6 points maximum.
- Adjustable-rate mortgages (ARMs) may have different point structures than fixed-rate loans.
Why This Tool Is Useful
Deciding whether to buy mortgage points is a common dilemma for homebuyers, as it requires weighing short-term upfront costs against long-term monthly savings. This tool eliminates guesswork by calculating exactly how long you need to stay in the home to break even on point costs. It also shows total savings over your planned ownership period, helping you align the decision with your personal budget and long-term housing plans. Financial planners and loan officers can use this tool to walk clients through trade-off scenarios quickly and transparently.
Frequently Asked Questions
Are mortgage points worth it if I plan to sell in 5 years?
It depends on your recoup period. If your recoup time is less than 5 years (60 months), you will save money overall. If the recoup period is longer than 5 years, you will lose the upfront point cost minus any savings you accumulated before selling. Use this calculator to check your specific numbers.
Can I roll discount points into my mortgage loan?
Most lenders allow you to roll point costs into your total loan amount, but this increases your loan balance and total interest paid over time. If you roll points into the loan, you do not pay them upfront, but you will pay interest on that amount for the life of the loan. This calculator assumes points are paid upfront at closing; adjust your loan amount input if you plan to roll points into the loan.
Do discount points affect my APR?
Yes, discount points lower your annual percentage rate (APR) because they reduce the interest rate you pay over the life of the loan. The APR includes both your interest rate and upfront fees like points, so buying points will typically result in a lower APR than a loan with the same interest rate but no points.
Additional Guidance
Always get a loan estimate from your lender that breaks down point costs and interest rate reductions clearly before making a decision. Compare the total cost of the loan with points versus without points over your planned ownership period, not just the monthly payment. If you have a high income tax bracket, the tax deductibility of points may make them more valuable to you. If you expect to refinance in the near future (e.g., if rates are projected to drop), avoid buying points as you will not stay in the loan long enough to recoup the cost. For jumbo loans or non-conventional mortgages, point structures may differ, so confirm terms with your lender directly.