Are Mortgage Points Worth It? The Math Most Calculators Skip
Somewhere between the rate quote and the closing disclosure, a lender asks if you want to buy points. You nod, unsure. So: are mortgage points worth it? The honest answer is that it depends entirely on one number almost nobody calculates at the table — the mortgage points breakeven month. Most online tools quote you a lower rate and a bigger upfront cost, then leave you to feel out whether the trade is good. This post does the part they skip. We'll define a point, walk a concrete dollar example, and find the exact month your savings repay your upfront cash.
What a discount point actually is
A discount point is prepaid interest. One point equals 1% of your loan amount, paid in cash at closing, in exchange for a lower fixed rate for the life of the loan. On a $400,000 mortgage, one point costs $4,000 and two points cost $8,000. How much rate you get back per point varies by lender and market, but a common ballpark is that each point buys down the rate by roughly 0.25 percentage points.
The appeal is simple: a lower rate means a lower monthly payment, every month, for as long as you keep the loan. The catch is equally simple: you pay for that lower payment today, and it takes time to earn the money back. Whether points are a good deal is a race between your upfront cost and your monthly savings — which is exactly what a proper discount points calculator should make visible.
A worked example: $400,000, 30-year fixed
Let's use real numbers and a real formula. The monthly principal-and-interest payment on a fixed loan is:
M = P · r · (1 + r)ⁿ ÷ ((1 + r)ⁿ − 1)
Here P is the loan amount ($400,000), r is the monthly rate (annual rate ÷ 12), and n is the number of payments (360 for a 30-year loan). Suppose the par rate — the rate with zero points — is 6.75%. Paying two points ($8,000) drops it to 6.25%. Running the formula:
- No points, 6.75%: monthly P&I = $2,594.39
- Two points, 6.25%: monthly P&I = $2,462.87
That's a monthly saving of $131.52. Now the only question that matters: how long until $8,000 of upfront cost is paid back at $131.52 a month?
$8,000 ÷ $131.52 ≈ 61 months
So the breakeven lands at roughly month 61 — just over five years. Keep the loan past month 61 and the points start paying you. Sell or refinance before then and you've lost money on the trade. The single point option is gentler: $4,000 to reach 6.375%, saving $98.91 a month, for a breakeven near month 40.
| Option | Rate | Upfront cost | Monthly P&I | Monthly savings | Breakeven (months) |
|---|---|---|---|---|---|
| No points | 6.750% | $0 | $2,594.39 | — | — |
| 1 point | 6.375% | $4,000 | $2,495.48 | $98.91 | ≈ 40 |
| 2 points | 6.250% | $8,000 | $2,462.87 | $131.52 | ≈ 61 |
Notice that the second point buys less rate per dollar than the first in this example — a frequent pattern. The first point dropped the rate 0.375 points; the second added only another 0.125. That's why two points takes longer to break even than one. Always compare each option on its own breakeven, not on the headline rate alone.
When points are worth it
Points make the most sense when you're confident you'll hold the loan well past breakeven. If this is a long-term home and you plan to keep the mortgage 10, 15, or 20 years, paying past a five-year breakeven can save real money over the full term. The longer you stay, the more those monthly savings compound past the point of repayment. Buyers who value a lower, predictable payment — and who have cash to spare after their down payment and reserves — are the natural candidates.
When points are not worth it
Points stop making sense the moment your timeline gets shorter than your breakeven. A few common cases:
- You'll move before breakeven. If you expect to sell within five years — and many buyers do — the two-point option above never pays for itself. You'd hand over $8,000 and recover only part of it.
- You'll likely refinance. If rates are elevated and you expect to refinance when they fall, you may not hold this exact loan long enough to break even. Refinancing resets the clock and your prepaid interest is gone.
- The cash is better spent elsewhere. Money spent on points can't go toward a larger down payment, closing reserves, or avoiding mortgage insurance. Sometimes a bigger down payment — or simply keeping the cash as a cushion — beats buying down the rate.
One more situational note: discount points are sometimes tax-deductible as mortgage interest, which can shift the math in your favor. Whether they are, and by how much, depends on your specific situation and the year's rules. That's a question for a tax professional, not a blog post — treat any deduction as a bonus, not a reason to buy.
Want to see your own breakeven instead of ours? Enter the par rate, the bought-down rate, and your points, and NexStepHome shows your cash-to-close and lifetime cost side by side.
The bottom line
Are mortgage points worth it? Only if you'll keep the loan past the breakeven month — and the only way to know that month is to do the division: upfront cost ÷ monthly savings. In our $400,000 example, two points broke even around month 61 and one point around month 40. Your loan size, rate buy-down, and timeline will shift those numbers, so run them for your own deal before you commit. These are planning estimates, not financial advice; your lender's actual rate sheet is the source of truth, so confirm every figure with them before closing.