Mortgage Points: How to Calculate the Real Break-Even
Paying points buys a lower rate. The usual shortcut divides the cost by the monthly savings, but it ignores faster principal paydown. Here is the full calculation, and why how long you keep the loan decides everything.
When you get a mortgage quote, you will often be offered a menu: this rate with no points, a lower rate if you pay one point, lower still at two. A point is simply prepaid interest. You pay money upfront at closing, and in exchange the lender gives you a lower interest rate for the life of the loan.
Whether that trade is worth it depends almost entirely on one thing you cannot know for certain: how long you will keep the loan before selling or refinancing. This guide shows how to calculate the break-even properly and how to think about that uncertainty.
The short version
- One discount point typically costs 1% of the loan amount. How much rate reduction a point buys varies by lender and market.
- The common shortcut is point cost ÷ monthly payment savings = months to break even.
- That shortcut slightly overstates the break-even, because a lower rate also pays down principal faster, which is money you get back when you sell or refinance.
- In our example, the shortcut says about 61 months. The full calculation says 48 months.
- If you are likely to sell, refinance, or pay off the loan before break-even, the points cost more than they save.
What you are actually buying
Lenders price mortgages as a combination of rate and upfront cost. Paying points moves you down the rate sheet; taking a slightly higher rate can sometimes earn a lender credit that reduces closing costs instead. These are two directions of the same trade.
Points are disclosed on your Loan Estimate and Closing Disclosure. Be careful to distinguish discount points, which buy down the rate, from origination charges, which are the lender's fee for making the loan and may also be expressed as a percentage.
The example
A hypothetical $400,000, 30-year fixed-rate mortgage, offered two ways:
| No points | One point | |
|---|---|---|
| Interest rate | 6.75% | 6.50% |
| Upfront cost for points | $0 | $4,000 |
| Monthly principal and interest | $2,594.39 | $2,528.27 |
| Monthly savings | $66.12 |
Rates and point pricing here are illustrative. Real pricing depends on the market, your credit, the loan type, and the lender.
The shortcut break-even
This is the number most calculators and loan officers quote, and it is a reasonable rough guide.
The full break-even
The shortcut counts only the lower payment. But a lower rate also changes how each payment is split. At 6.50%, a bit less of each payment goes to interest and a bit more goes to principal. So at any point in time, the one-point loan has a lower remaining balance than the no-point loan.
That matters, because when you sell or refinance, you pay off the remaining balance. A lower balance is money in your pocket.
Running both loans month by month, the advantage turns positive at month 48, a full year earlier than the shortcut suggests.
Show the numbers behind this chart
| Years you keep the loan | Net advantage of one point |
|---|---|
| 1 | $-2,999 |
| 2 | $-1,995 |
| 3 | $-989 |
| 4 | $18 |
| 5 | $1,026 |
| 6 | $2,033 |
| 7 | $3,039 |
| 8 | $4,042 |
| 9 | $5,041 |
| 10 | $6,034 |
| Years you keep the loan | Net result of paying one point |
|---|---|
| 3 | about −$989 |
| 5 | about +$1,026 |
| 7 | about +$3,039 |
| 10 | about +$6,034 |
| 30 (full term) | about +$19,803 |
The opportunity cost
There is one more adjustment that purists make. The $4,000 paid at closing could have been used for something else: kept in savings, invested, used to make a larger down payment, or held as an emergency reserve. That alternative has value, and it pushes the true break-even somewhat later than 48 months, by how much depends on what the money would otherwise have earned.
For many households the bigger consideration is liquidity. Right after buying a home is often when cash is tightest and surprise repairs are most likely. Spending reserves on points can leave less room for those.
How long will you really keep the loan?
This is where most of the decision lives. A mortgage ends early when you:
- Sell the home. Many people move sooner than they expect for jobs, family, or space.
- Refinance. If rates fall significantly, refinancing pays off the old loan and the points you paid on it stop earning their return.
- Pay it off early with extra payments or a lump sum.
The scenario where points work best is someone who expects to stay put for many years and believes rates are unlikely to fall enough to make refinancing attractive. Points work worst when rates are high and might drop, because a future refinance would cut the payoff period short.
A practical way to frame it
Instead of asking "what is the break-even?", ask "how confident am I that I will still have this exact loan in five years?" If you would not bet on it, the points are a weak trade, even if the math looks good on a 30-year horizon.
Points and taxes
Mortgage points can be tax-deductible in some situations, either fully in the year paid or spread over the life of the loan, depending on the loan type, how the points are paid, and whether you itemize. Because most households take the standard deduction, many get no tax benefit from points. Tax rules are specific; a tax professional or the IRS publications on home mortgage interest can tell you how they apply to you.
Other ways to lower the payment
- Larger down payment. Reduces the loan amount itself and may help avoid mortgage insurance.
- Temporary buydowns. Some loans offer a lower rate for the first year or two, funded upfront by the seller or builder. The rate rises afterward, so plan for the full payment.
- Shopping lenders. Comparing Loan Estimates from several lenders on the same day can matter as much as points. Compare the rate and the total upfront cost together.
- Seller concessions. In some markets, a seller may pay part of your closing costs or points.
How to compare offers
- Get Loan Estimates for the same loan amount and term from multiple lenders on the same day.
- For each rate option, note the points or lender credits and the monthly principal and interest.
- Calculate the shortcut break-even, then shave roughly 15–25% off it as a rough allowance for faster principal paydown at typical rates (or run a full amortization comparison).
- Compare that against a realistic estimate of how long you will keep the loan.
- Consider whether the upfront cash would be better kept as reserves.
The takeaway
Points are a bet that you will keep this exact mortgage longer than the break-even. The simple formula is a decent starting point but overstates the wait; including faster principal paydown brings it in, while the opportunity cost of the cash pushes it back out. If you expect to move or refinance within a few years, the points probably will not pay for themselves. If you plan to stay for a decade and don't expect to refinance, they can.
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