Mortgage Points Calculator: Break-Even Analysis and Cost Savings

Mortgage Points Break-Even Calculator Explained

Break-even is the whole decision, and it's one division. Take the upfront cost of the points and divide it by the monthly payment savings the lower rate buys you. The answer is the number of months you have to keep the loan before the points pay for themselves. Here it is with real numbers:

Worked example 1: $400,000 at 0, 1, and 2 points

A 30-year fixed loan of $400,000, quoted at 6.75% with no points and a 0.25% buy-down per point. This is the exact comparison to ask your loan officer for — the rate at zero, one, and two points on the same loan, same day:

Two things fall out of that table. First, buying more points doesn't change the break-even date — one point and two points both pay back in month 61, because the second point costs exactly as much as the first and buys exactly as much savings. The choice between 1 and 2 points is about how much cash you want to commit to the same bet, not about which one pays back faster. Second, the payoff past break-even is large and boring: $66 a month forever on one point ($793 a year, $19,803 net over the full term) and $132 a month on two ($1,578 a year, $39,348 net).

Worked example 2: the same loan when you leave early

Break-even is a bet on how long you hold the loan, so the honest way to read it is at several exit dates. Same $400,000 loan, same 0.25% buy-down — here's what you are up or down when you sell or refinance at each point:

Year 5 is essentially a coin flip — you finish within $100 of where you started, on either 1 or 2 points, after tying up thousands of dollars for five years. That's the real shape of the decision: points are close to worthless around break-even and only get interesting well past it. (These figures count payment savings only. The lower rate also retires principal a little faster — about $630 more equity by year 3 on the 1-point loan — so your true position at every exit date is slightly better than the table shows.)

Break-even month by buy-down per point

One number decides everything above: how much rate your lender gives you per point. The table below runs a single point on a $300,000 loan at a 6.75% base rate across the buy-downs you'll actually see quoted. The point costs $3,000 in every row — only the rate cut changes:

The spread is enormous — the same $3,000 buys back its cost in 2.5 years at the top of the table and 12.6 years at the bottom. Below roughly 0.10% per point the deal falls apart completely: a $3,000 point that buys only $18 a month takes 167 months, nearly 14 years, to repay, which is longer than almost anyone keeps a mortgage. Anything under 0.20% per point deserves a hard look at par pricing or a lender credit instead.

Note what is notin that table: the number of points you buy and the size of the loan. Neither moves the break-even month — more on the loan-size effect below — which is why the single question to put to your lender is "what's the rate at 0 points versus 1 point?" Everything else follows from that one spread. Before committing the cash, weigh it against the other lever on lifetime interest — a 15-year term instead of a 30-year cuts far more interest than any buy-down, though it raises the payment rather than lowering it.

How many points to lower your mortgage rate by 1%?

At the standard 0.25%-per-point buy-down, a full 1.00% rate cut takes 4 points — and because each point costs 1% of the loan, that's 4% of your loan amount in cash at closing. On a $400,000 mortgage:

The 4-point answer depends entirely on your lender's buy-down. At a weaker 0.20% per point you'd need 5 points ($20,000) for the same 1% cut, pushing break-even to 77 months. At a stronger 0.30% per point it takes only 3.3 points ($13,333)and break-even falls to 51 months. Confirm the per-point number on your rate sheet before assuming "4 points" applies to you.

Break-even by loan amount: $200k, $400k, $600k

Here's the part that surprises most buyers — the loan amount doesn't change your break-even month at all. The cost of a point and the monthly savings both scale with the loan, so they cancel out. A $600,000 borrower and a $200,000 borrower buying the same buy-down break even in the same month; only the dollar figures differ. All rows below assume a 30-year loan at 6.75% base:

The practical takeaway: bigger loans don't make points a better or worse deal — they just raise the stakes. A $600,000 borrower puts $24,000 on the line for the same 5-year payback a $200,000 borrower gets for $8,000. What actually moves break-even is the buy-down per point (see above) and nothing else, which is why the one number to pull off your loan estimate is the rate at 0 points versus the rate at 1 point.

Buy points if you plan to stay this long

Line your realistic time-in-loan up against the break-even month. Using the 61-month break-even above — which, as the table shows, applies at any loan size — the decision falls out cleanly:

The cutoff shifts with your actual buy-down: a stronger 0.30%-per-point cut pulls break-even in to about 51 months, while a weak 0.20% cut pushes it out to 76 months — six years and four months, long enough to sink the deal for most buyers. Before committing the cash, weigh points against the other big lever on lifetime interest — a 15-year vs. 30-year term — and against the event that erases a bought-down rate entirely, a refinance.

Worth running before you commit: points are not the only way to cut lifetime interest, and the alternatives don't require cash at closing or a bet on how long you'll stay. Putting the same $4,000 toward the principal — or simply paying a bit more each month — shortens the loan without any break-even risk at all. Compare the buy-down against making extra mortgage payments and against a biweekly payment schedule, which squeezes in one extra payment a year with no upfront cost. If you might sell or refinance inside five years, those two beat points outright.

What Discount Points Actually Buy You

A discount point is a one-time, upfront fee that lowers your mortgage rate for the entire life of the loan. The pricing convention is fixed at 1% of the loan amount per point — one point on a $300,000 loan costs $3,000. In exchange, the lender drops your rate by a buy-down amount they set, typically in the 0.20%–0.30% range per point, with 0.25% being the most common number on real-world rate sheets.

That rate cut compounds across every payment for the rest of the loan. On a $300,000 30-year mortgage, taking the rate from 6.75% to 6.50% saves roughly $50 a month — small in any given month, but $18,000 over 30 years. The question is never "is the monthly cheaper" (it always is) — it's how long does it take to recover the upfront cost, and will you still be holding this loan when that day arrives.

That's the break-even calculation, and it's the only one that matters when deciding whether to buy points. Worth knowing before you commit the cash: buying down the rate is only one lever on lifetime interest. Shortening the term is the other, and it's usually the stronger one — compare a 15-year against a 30-year before assuming points are the best use of the money.

Discount Points vs. Origination Fees

Both are quoted in "points," both show up on the loan estimate, and both are calculated as 1% of the loan amount each. That's where the similarity ends.

• Discount points are optional and produce a permanent rate reduction. You are buying down the rate.
• Origination points / origination fee are what the lender charges to originate, underwrite, and close the loan. They are not optional with that lender and they do not change your rate.

When you compare loan estimates from two lenders, separate the discount points from the origination fee on each side before doing any math. A loan with one origination point and no discount points isn't equivalent to a loan with one discount point and no origination fee — the second one comes with a lower rate that lasts 30 years.

When Buying Points Is a Bad Deal

The math itself almost always shows monthly savings — that part isn't the decision. The decision is whether you'll be in the loan long enough to recover the upfront cost. Three scenarios where points reliably lose money:

• Short expected stay.If you're likely to sell within the break-even window (about 5 years on a 0.25%-per-point buy-down), you'll walk away from the points before they've paid for themselves. The U.S. median homeowner moves every 8 years; first-time buyers move sooner.
• Likely refinance.Points are a bet that you'll still hold this loan after the break-even date. If rates drop and you refinance, the new loan replaces the old one — your bought-down rate is gone, and the points cash with it. Avoid points when rates feel high or the curve is steeply inverted; both are setups for a refinance window inside the break-even period.
• Better use of the cash.If using that money for a larger down payment would push you past 20% LTV and eliminate PMI entirely, that's usually the bigger lever. Same goes for paying off a credit card at 22% APR, or hitting an employer 401(k) match. Compare points against the next-best use of the same dollars, not against the do-nothing alternative.

Negative Points & Lender Credits — the Mirror Case

The opposite of buying points is taking negative points, also called lender credits or rebate pricing. The lender pays a portion of your closing costs in exchange for a higher interest rate. Same math, flipped: you save cash upfront and pay more interest over time.

The break-even works the same way, in reverse. Lender credits are a good deal when:

• You're tight on closing-day cash and would rather not stretch to the full closing costs.
• You expect to sell, refinance, or pay off the loan before you would have caught up to the higher-rate payments — short expected stays and likely-refinance scenarios both favor credits over points.
• You expect rates to drop in the next 1–3 years. The credit-paid closing costs are real money in hand; the higher rate gets replaced when you refinance.

For long-term holders with cash on hand and a flat or rising rate outlook, discount points win. For short-term holders, refinance-likely borrowers, or anyone who'd rather keep the cash, lender credits often win. The calculator above handles both directions — enter a negative number in the points field to see the lender-credit scenario.

The Tax Angle on Points

Discount points on a primary residence are generally treated as prepaid mortgage interest by the IRS. On a purchase loan, you can usually deduct the full amount in the year you paid them, provided several conditions are met — the loan is secured by your main home, the points are an established practice in your area, and the amount isn't excessive. On a refinance, points must be amortized over the life of the new loan: $3,000 of points on a 30-year refi means $100 per year of deductible interest, not a single big deduction.

The catch: deductions only matter if you itemize. With the post-TCJA standard deduction at roughly $30,000 for joint filers, most homeowners don't itemize and the tax benefit on points is effectively zero. Don't let a vague "they're tax-deductible" line from a loan officer change the break-even math — confirm with a tax pro what the deduction is actually worth to you.

How to Read Your Lender's Rate Sheet

Every loan estimate should show three rate options: par (zero points, zero credits), buy-down with points, and rebate pricing with lender credits. The rate-reduction-per-point in this calculator's default (0.25%) is a placeholder — the only number that matters is the one on your lender's sheet for your loan on that day.

Ask for the buy-down sheet explicitly. Look at the rate at 0 points, the rate at 1 point, and the rate at 2 points. Plug the actual difference into this calculator. If your lender's sheet shows less than 0.20% per point of buy-down, points are priced poorly that day and you should usually take par or a credit instead.

Related Reading

• Closing costs — everything else due on closing day, so you can see what the points cash is competing against.
• Refinance calculator — the event that wipes out a bought-down rate. Check its break-even before you pay for points.
• 15 vs 30-year mortgage — the other way to cut lifetime interest, and often a bigger lever than buying down the rate.
• Extra payments calculator — what the same cash does against principal instead, with no break-even to clear.
• Biweekly mortgage calculator — one extra payment a year, zero upfront cost. The better move if you may move or refinance early.