A mortgage points calculator compares the estimated principal-and-interest payment with and without discount points. Enter the loan amount, rate, term, number of points, and the rate reduction quoted for each point to estimate the upfront cost, monthly payment difference, and a simple break-even month.
Point pricing and the rate reduction offered vary by lender and loan. Use the figures from the same loan quote, and treat the result as a comparison, not a recommendation or a complete measure of which mortgage costs less. The CFPB explains that discount points trade a higher upfront cost for a lower rate, and that the reduction varies by lender, loan, and market; see its guide to points and lender credits.
How to Use the Mortgage Points Calculator
- Enter the loan basics: Type the Loan Amount, the Interest Rate (%), and the Loan Term (Years).
- Describe the points deal: Enter Points (%), where each point equals 1% of the loan amount, and the Rate Reduction per Point (%) your lender quoted, for example 0.25.
- Optionally add a holding period: Fill in the Holding Period (years, optional) if you expect to sell or refinance before the loan ends.
- Calculate and review: Click Calculate to see the Monthly Savings, Payment with Points, Points Cost, Break-Even Months, and Total Savings.
- Check your own horizon: With a holding period entered, the panel also shows the net result if you sell or refinance at that point.
The break-even month, defined once under Understand the break-even result below, is the number to watch, because point pricing varies by lender and loan.
What the calculator compares
The calculator builds two payment estimates using the same loan amount and term:
- No-points case: The entered interest rate.
- Points case: The entered interest rate minus the number of points multiplied by the rate reduction per point.
The tool treats one point as 1% of the loan amount. For example, two points on a $320,000 loan cost $6,400 in this calculation. The rate reduction is an input, not a standard amount guaranteed for each point.
Estimate point cost and payment savings
Enter the quoted rate reduction per point. With a $320,000 loan at 6.5% for 30 years, two points, and a 0.25 percentage-point reduction per point, the model reduces the comparison rate to 6.0%. The no-points monthly P&I estimate is $2,022.62; with points, it is $1,918.56. The modeled monthly difference is $104.06, and the upfront point cost is $6,400.
These are example inputs, not a current mortgage quote. The calculator compares principal and interest only; it does not include property tax, homeowners insurance, mortgage insurance, other lender fees, or closing costs.
Understand the break-even result
The break-even month is the point cost divided by the estimated monthly payment savings, rounded up to a whole month:
Break-even months = points cost ÷ monthly P&I savings
In the example, $6,400 divided by $104.06 is about 61.5, so the tool reports 62 months. This is a simple cash-flow comparison. If the monthly savings are zero or negative, there is no break-even result.
You can optionally enter how long you expect to keep the loan. The displayed net amount is calculated as monthly savings multiplied by the number of months, minus the point cost. It is not a complete sale-or-refinance analysis: it does not compare remaining loan balances or proceeds at that date.
How sensitive the result is to the quoted reduction
The same two points can be a strong deal or a poor one depending on the rate reduction the lender attaches to them, and no rule fixes that reduction. Holding the $320,000 loan, 6.5% starting rate, and 30-year term constant, the calculator returns these results for three different reductions:
| Reduction per point | Rate with two points | Monthly P&I | Monthly saving | Break-even |
|---|---|---|---|---|
| 0.125 percentage point | 6.25% | $1,970.30 | $52.32 | 123 months (10.3 years) |
| 0.25 percentage point | 6.00% | $1,918.56 | $104.06 | 62 months (5.2 years) |
| 0.375 percentage point | 5.75% | $1,867.43 | $155.18 | 42 months (3.5 years) |
Halving the reduction roughly doubles the break-even, because the cost stays at $6,400 while the monthly saving halves: 123 months at 0.125 against 62 at 0.25. That is why a quoted line such as "one point buys a quarter percent" cannot be checked against a standard. It has to be compared with the same lender's pricing on the same day, and the comparison has to use the payment the lender discloses.
The break-even figure also hides a downside when the hold is short. Take the 0.125-point row and a four-year hold: the payment saving is $52.32 a month, so 48 months of it adds up to about $2,511, while the points still cost $6,400. The tool's holding-period result reports a net of −$3,888.51 — buying those points would leave you that much behind at the sale. The same $6,400 with a 0.375-point reduction and the same four-year hold nets +$1,048.86, because the larger saving outruns a 42-month break-even. Same cost, same hold, opposite verdicts — which is why the reduction per point, not the number of points, is the number to negotiate.
Important assumptions
- Quoted pricing: Enter the rate reduction and point cost from the lender's actual offer. The calculator does not estimate the market value of a point or verify a quote.
- Upfront payment: Points are treated as paid upfront and are not financed into the loan balance.
- Full-term result: Total savings compares scheduled P&I payments over the entire term and subtracts the points cost. It excludes tax effects, fees, opportunity cost, and other housing expenses.
- Holding period: The optional estimate subtracts the upfront cost from accumulated monthly payment differences. It does not include principal-balance differences if you sell or refinance early.
- Tax treatment: The tool does not determine whether points are deductible. Ask a qualified tax professional about your situation.
Compare the result with the lender's Loan Estimate and the no-points alternative. Consider your expected time with the loan, upfront cash needs, and the complete loan costs before deciding.
Beyond the break-even: APR and taxes
Comparing two offers that use different points
The interest rate alone cannot rank two offers when one carries points and the other does not. A loan with a lower rate and a large point charge can cost more over the same holding period, and the annual percentage rate is designed to fold the point cost into a single comparison number. The CFPB explanation of rate versus APR sets out what the APR includes and where it still falls short. A workable order is to compare the APR first, then the break-even month at your expected holding period, then the cash required at closing, because points come out of savings rather than out of the loan in this model.
Tax treatment is separate from the break-even
Points can carry a tax benefit that changes the effective cost, and the rule depends on the transaction. IRS Publication 936 explains the conditions under which points on a home purchase are deductible in the year paid, and why points paid on a refinance generally have to be deducted over the life of the loan. The calculator models none of this, and it does not know your filing status, your itemizing decision, or the purpose of the loan, so the break-even month it reports is a pre-tax cash comparison.
To estimate a mortgage payment, use the Mortgage Calculator. For selected settlement costs, see the Closing Cost Calculator. To model replacing an existing mortgage, use the Mortgage Refinance Calculator.
A concrete rule follows from the model: if your expected hold on the loan is shorter than the break-even month, decline the points; if it is longer, the points still have to compete with every other use of that cash at closing. When an offer arrives, the points charge typically appears in the Origination Charges section of the lender's Loan Estimate, and the rate reduction it buys should come from the same written quote — if the two are not quoted together, the break-even here cannot be computed honestly. The same cost-versus-savings test matters again when refinancing an existing mortgage at a lower rate.
Last verified: October 2026. Calculator figures are outputs for the inputs entered; they are not live quotes, current rates, or an offer.