Discount points let you trade upfront cash for a lower interest rate. Whether that trade is worth it comes down to one number: your break-even month.
At nearly every mortgage closing, buyers face a choice: pay a higher rate and keep cash in pocket, or pay discount points upfront and lock in a lower rate for the life of the loan. Loan officers often present this as a simple trade-off, but the right answer depends entirely on how long you plan to stay in the home — and how you value the opportunity cost of the cash you'd spend.
This guide walks through the mechanics of discount points, the break-even calculation, a worked example with real numbers, and the situations where buying points clearly makes sense versus when you should skip them.
A discount point is prepaid interest. You pay a lump sum at closing in exchange for a permanently lower interest rate on your mortgage. One point equals 1% of the loan amount. On a $400,000 loan, one point costs $4,000.
The rate reduction per point varies by lender, loan type, and market conditions — there is no universal standard. A common approximation is that one point reduces the rate by roughly 0.25 percentage points, but lenders may offer more or less than this. Always get the exact rate reduction in writing before making your decision.
These are often confused because both cost 1% of the loan per "point" and both appear on your Loan Estimate. The difference is critical:
When comparing lenders, check both. A lender with a low rate but high origination fees may cost more than one with a slightly higher rate and no origination fees — the break-even calculation applies here too.
The decision to buy points comes down to a single mathematical question: how many months will it take for the monthly savings from the lower rate to pay back the upfront cost of the points?
If you stay in the home (and keep the loan) longer than the break-even period, you come out ahead. If you sell, refinance, or pay off the loan before the break-even, you've spent more on points than you saved in interest.
These numbers are illustrative examples. Your actual rate, payment savings, and break-even will differ based on your loan amount, the lender's specific point pricing, and prevailing market rates at time of application.
In this example, if you stay in the home for more than 5 years without refinancing, buying the point saves money. At 10 years, you've saved approximately $4,040 more than the cost of the point. At 30 years (the full loan term), the total interest savings are far larger.
The break-even calculation has a blind spot: it ignores what you could do with the $4,000 if you didn't spend it on points.
If you invested that $4,000 in a broad market index fund earning an average long-term return, you would accumulate a meaningful sum over 5–10 years. When you compare the break-even calculation's implied "savings" to the alternative of investing the same money, the math becomes less one-sided than it first appears.
The counterargument is that the mortgage interest savings are a guaranteed, risk-free return — the lower rate saves you exactly what it says every month, with no market risk. Investments can underperform or lose value. For risk-averse borrowers or those nearing retirement who value certainty over expected returns, the guaranteed savings from points can be worth more than the opportunity cost suggests.
Neither argument wins universally. The right answer depends on your risk tolerance, your investment horizon, and whether you value a guaranteed return or potential upside.
| Situation | Buy Points? | Why |
|---|---|---|
| Planning to stay 7+ years, unlikely to refinance | Yes | Long timeline maximizes cumulative savings well past break-even |
| Risk-averse, value guaranteed savings | Yes | Points offer a fixed, certain return unlike investments |
| Seller is paying concessions — can use for points | Yes | Free points from seller effectively have no upfront cost to you |
| Moving in 3–5 years | No | Unlikely to reach break-even before selling |
| Rates are high and likely to fall — likely to refinance | No | Refinancing resets the loan and wastes the points cost |
| Cash is tight at closing | No | Better to preserve liquidity for emergencies or moving costs |
The break-even calculation assumes you keep the loan for its full term without refinancing. Every time you refinance, you restart the clock — and the cost of the original points is gone. If you expect to refinance within a few years, buying points on the current loan is rarely worthwhile.
Yes — and this is often overlooked. Seller concessions (where the seller credits you money at closing) can be applied toward discount points. If you negotiate seller concessions in a purchase, buying down your rate with that money effectively costs you nothing out of pocket.
Loan programs cap how much sellers can contribute. Conventional loans generally allow 2–9% in seller concessions depending on your down payment, FHA allows 6%, and VA allows 4%. Consult your lender for the specific limits on your loan type.
Use our free mortgage calculators to compare your payment at different rates and find your personal break-even point.
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