US Mortgage Points (Discount Points) Break-Even Calculator
Compute how long it takes for purchasing mortgage discount points to pay for themselves by comparing monthly payment savings versus the up-front cost of points.
- Page updated:
- Jan 3, 2026
- Tool version:
- v1.1.0
Overview
This calculator estimates how long (in years and months) it takes for paying mortgage discount points to be repaid through lower monthly payments.
Enter your loan amount, the interest rate without points, the rate with points, the percent of points purchased, and the loan term. The tool uses the standard amortizing loan formula to compute monthly payments and savings.
Results
Points cost
$3,000.00
Monthly payment without points
$1,520.06
Monthly payment with points
$1,432.25
Monthly savings
$87.81
Annual savings
$1,053.72
Break even years
2.8471
Break even months
34.1647
Notes
Break-even calculated as up-front points cost divided by annual savings. Does not consider taxes, refinancing or prepayment.
How to read the result
- What it means
- The displayed value is an estimate based on your inputs. It represents the calculated scenario under current assumptions, not a guaranteed amount.
- Calculation limits
- The model uses simplified formulas and cannot account for all variables in your specific case (local regulations, personal conditions, temporal changes).
- Next step
- Use the result as a starting point. Adjust parameters to compare scenarios and validate with a professional when needed.
Glossary+−
- Discount point
An upfront fee paid to the lender at closing to reduce the mortgage interest rate. One point equals 1% of the loan amount.
- Break-even period
Time required for the cumulative payment savings from a lower interest rate to equal the up-front cost of points.
- Amortizing loan
A loan repaid with regular payments where each payment covers interest and principal so the balance reaches zero at maturity.
Key takeaways
The calculator provides a practical payback period for discount points using standard amortization formulas.
Use the break-even period to compare whether paying points makes sense given how long you expect to keep the mortgage.
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Useful links
Worked examples
Example: 30-year mortgage
Loan $300,000. Rate without points = 4.50% → monthly payment ≈ $1,520.06. Rate with 1.00 point (1%) = 4.00% → monthly payment ≈ $1,432.25. Monthly savings ≈ $87.81 → annual savings ≈ $1,053.72. Points cost = $3,000. Break-even ≈ 2.85 years (≈34.9 months).
Interpretation
If you plan to keep the loan longer than the break-even period, buying the point may reduce total interest paid; if you refinance or sell before break-even, buying points likely won't pay off.
Frequently asked questions
Do tax rules affect break-even?
Potentially. Points may be deductible under certain conditions; tax treatment can affect your net benefit. Consult a tax professional for guidance specific to your situation.
Does this include the time value of money?
No — this calculator provides a simple payback (break-even) analysis based on nominal payment savings. For a discounted cash flow comparison, use a present-value analysis or consult a financial advisor.
Sources & references
- CFPB - What are discount points?: https://www.consumerfinance.gov/ask-cfpb/what-are-discount-points-en-1795/
- Freddie Mac - How to calculate mortgage payments: http://www.freddiemac.com/learn/how_mortgage_payment_is_calculated.html
- IRS - Publication on mortgage interest and points: https://www.irs.gov/taxtopics/tc505
Quality & oversight
- Author
- Ugo Candido, MBA
- Maintained by
- Ugo Candido, MBA
- Page updated
- Jan 3, 2026
- Tool version
- v1.1.0