Estimate whether paying mortgage discount points makes financial sense for your situation. One point typically costs 1% of your loan amount.
What Is a Buy Point Calculator?
A buy point calculator helps you evaluate whether paying discount points at closing is worth it. In mortgage lending, each discount point is a fee you pay upfront to reduce your interest rate. The most common convention is simple: one point costs 1% of the loan amount.
The key question is not just “Will my payment be lower?” but “Will I keep this loan long enough to recover the upfront cost?” This calculator is designed specifically to answer that second question.
How This Calculator Works
1) It estimates point cost
Point cost = Loan amount × (Points purchased / 100). If your loan is $350,000 and you buy 1 point, your cost is $3,500.
2) It estimates your new rate
Every lender prices points differently. Some may reduce your rate by 0.125% per point, others by 0.25% or more depending on market conditions. The calculator lets you enter your own estimate using “Rate reduction per point.”
3) It compares monthly payments
It computes the principal-and-interest payment for both scenarios: with no points, and with points. The difference is your monthly savings.
4) It finds your break-even point
Break-even months = Upfront point cost ÷ Monthly savings. If you sell, refinance, or pay off the mortgage before break-even, buying points may be a losing move.
When Buying Points Often Makes Sense
- You plan to stay in the home long enough to cross break-even.
- You are unlikely to refinance in the near future.
- You have enough cash after closing to preserve your emergency fund.
- You prioritize stable, lower monthly obligations.
When Buying Points May Not Be Worth It
- You may move within a few years.
- You believe rates will drop and expect to refinance soon.
- You need liquidity for repairs, reserves, or other high-priority goals.
- Your lender offers only a very small rate reduction per point.
Example Decision Framework
Imagine your points cost is $4,000 and your monthly savings is $80. Your break-even is 50 months (about 4.2 years). If you expect to keep the loan for 8 years, you could come out ahead. If your plan is to move in 3 years, you probably should skip points.
This is why “buy points or not” is less about right vs. wrong and more about timing, cash flow, and certainty around your housing plans.
Smart Tips Before You Commit
Ask your lender for side-by-side quotes
Request estimates with zero points, one point, and two points on the same day. That allows an apples-to-apples comparison.
Evaluate opportunity cost
Money spent on points cannot be used elsewhere. Compare the expected benefit from points against alternatives like paying down higher-interest debt or preserving cash reserves.
Look at total closing costs
Points are only one part of the picture. A loan with fewer points but lower overall fees could still be the better deal.
Final Takeaway
Buying points can be a powerful way to lower long-term mortgage costs, but only if your holding period is long enough. Use the calculator above to test realistic scenarios before you commit. A small change in rate assumptions or years-in-home can flip the decision.
This tool is educational and should be paired with lender disclosures and personalized advice. Always verify exact pricing, since discount point values vary by lender and market conditions.