How to use the mortgage points calculator
Our mortgage points calculator estimates how buying points affects the upfront cost, monthly payment and break-even period. It helps compare a higher-rate loan with lower upfront cost against a lower-rate loan with points paid at closing.
Use the loan amount, base rate, points purchased and rate-reduction-per-point inputs to test different scenarios. The default rate reduction is an estimate, not a universal rule. Lenders set point pricing based on loan type, market conditions and rate-lock options.
The Break-Even tab shows how long it takes to recover the cost of points through monthly savings. The Monthly Savings tab shows the payment difference. The Lifetime Savings tab estimates how much interest may be saved if the loan is kept for the full term.
What mortgage discount points actually do
Discount points are upfront charges paid at closing to reduce the interest rate on a mortgage. One point equals 1% of the loan amount. On a $400,000 loan, one point costs $4,000.
How discount points are priced
Each lender sets its own point-to-rate relationship. A common estimate is that one point may reduce the rate by about 0.25 percentage points, but the actual reduction can be smaller or larger. The exact cost and rate are shown on the Loan Estimate.
Why the rate reduction is permanent
Discount points lower the rate for the life of that loan. They are different from a temporary buydown, which lowers the payment for an introductory period before the payment rises to the note-rate level.
Discount points vs. origination points
Discount points and origination points are not the same. Discount points are paid to reduce the interest rate. Origination points are lender charges connected to making the loan. Both can appear on mortgage disclosures, so the label matters.
The break-even calculation
The break-even period is the time it takes for monthly savings to recover the upfront cost of the points.
Break-even formula: Cost of points ÷ monthly payment savings = break-even period in months
For example, assume a $400,000 loan, a 30-year term, a 6.75% base rate and one discount point that lowers the rate to 6.50%.
| Example Item |
Amount |
| Loan amount |
$400,000 |
| Cost of 1 point |
$4,000 |
| Base rate |
6.75% |
| Rate after point |
6.50% |
| Estimated monthly savings |
About $66 |
| Estimated break-even |
About 61 months |
This example is for educational purposes only. Actual point pricing depends on the lender’s rate sheet, loan type, lock date, credit profile, property type and market conditions.
What break-even does not account for
The basic break-even calculation does not account for opportunity cost, tax treatment, changes in investment returns or the possibility of refinancing before break-even. It also does not show whether using the same cash for a larger down payment would produce a better result.
When discount points tend to pay off
Discount points tend to be more useful when the loan is likely to be kept long enough for the monthly savings to recover the upfront cost. The longer the loan remains in place after break-even, the more the lower rate can matter.
Longer expected time in the loan
If the break-even period is five years and the borrower expects to keep the same mortgage for much longer, discount points may reduce total interest over time.
Stable long-term rate plans
Points are tied to the specific loan. If the borrower expects to refinance soon, the upfront cost may not be recovered before the loan is replaced.
Available cash after closing
Borrowers with enough post-closing reserves may compare points with other uses of cash. The trade-off is paying more at closing in exchange for a lower rate and payment.
When discount points typically do not pay off
Discount points may be less useful when the borrower is unlikely to keep the loan past the break-even period or needs to preserve cash after closing.
Selling or refinancing before break-even
If the loan is replaced or paid off before break-even, the borrower may not recover the upfront cost through monthly savings.
Using cash for a larger down payment
The same cash used for points could instead reduce the loan amount. A larger down payment may also help if it crosses a pricing or mortgage insurance threshold, such as reaching 20% down on a conventional loan.
Limited reserves
Spending cash on points can reduce post-closing reserves. If reserves become too tight, the lower rate may not justify the loss of flexibility.
Discount points vs. a larger down payment
Discount points and a larger down payment are two different uses of cash at closing. Points lower the rate. A larger down payment lowers the loan balance.
| Use Of $4,000 Extra Cash |
Example Result |
Main Trade-Off |
| Buy 1 discount point |
Rate drops from 6.75% to 6.50% in this example. |
Higher upfront cost for lower monthly payment. |
| Increase down payment |
Loan amount drops from $400,000 to $396,000. |
Lower balance, but rate stays the same. |
Points may produce more monthly savings than a small down-payment increase when the extra down payment does not cross a major threshold. If the larger down payment eliminates PMI or improves pricing, the comparison can change.
Discount points and refinancing
Discount points are tied to the specific mortgage. Refinancing replaces that loan, so any unrecovered cost from points on the original loan is effectively lost when the loan is paid off.
A borrower can choose to buy points on a refinance as well, but the same break-even logic applies. The longer the new loan is expected to remain in place, the more useful the break-even calculation becomes.
Are discount points tax-deductible?
Tax treatment depends on IRS rules and the borrower’s specific situation. IRS Publication 936 discusses home mortgage interest deduction rules, including points. It explains that points may be deductible under certain conditions, but the timing and treatment can differ for purchase loans and refinances.
A tax professional can explain whether points are deductible in a specific situation and tax year.
Frequently asked questions
How much does one discount point cost?
One discount point costs 1% of the loan amount. On a $400,000 loan, one point costs $4,000.
How much does one point lower my rate?
One point commonly lowers the rate by about 0.25 percentage points, but the actual reduction varies by lender, loan type, rate lock and market conditions. The exact pricing appears on the Loan Estimate.
Can discount points be negotiated?
Borrowers can compare lenders to see different point and rate combinations. Within a single lender, the point-to-rate schedule is usually tied to that lender’s rate sheet at the time of the lock.
Can the seller pay discount points?
Seller credits may be able to cover discount points if the credit fits the purchase contract and loan-program contribution limits. The treatment varies by loan type and transaction.
Are discount points refundable if I sell or refinance early?
No. Discount points are paid at closing and are generally not refundable. That is why the break-even period matters.
What is the difference between discount points and a temporary buydown?
Discount points reduce the interest rate for the life of the loan. A temporary buydown reduces the payment for a set introductory period before the payment rises to the note-rate amount.
Are negative points the same as lender credits?
Negative points generally describe a lender credit. The borrower accepts a higher rate in exchange for reduced upfront closing costs. The break-even math works in reverse.
What to review next
After estimating discount points, compare the point cost, monthly savings, break-even period, expected time in the loan, post-closing reserves and the alternative of using the same cash for a larger down payment.
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