Should I Buy Mortgage Points? The Break-Even Math Explained

Your lender hands you two offers: a 7.0% rate with no points, or a 6.5% rate if you pay $7,000 upfront. The lower rate looks attractive. But before you pay $7,000 for it, you need to know whether you'll actually recoup that money — and most buyers never do the calculation.

What Mortgage Points Are

One discount point equals exactly 1% of your loan amount. On a $350,000 loan, one point costs $3,500. Two points cost $7,000.

Each point typically reduces your interest rate by 0.25%, though this relationship varies by lender, loan type, and rate environment. In some cases, one point buys 0.125%; in others, it buys 0.375%. Ask for the exact rate reduction per point before comparing.

Points are paid at closing. They don't reduce your required down payment — they're an additional upfront capital outlay on top of closing costs.

The Break-Even Formula

The only question that matters is whether you'll keep the loan long enough to recover what you paid.

Break-Even (Months) = Total Cost of Points ÷ Monthly Payment Savings

Example: $350,000 loan, comparing two offers:

• Option A: 7.0% rate, no points → monthly P&I: $2,329
• Option B: 6.5% rate, paying 2 points ($7,000) → monthly P&I: $2,213

Monthly savings: $2,329 − $2,213 = $116/month

Break-even: $7,000 ÷ $116 = 60 months (5 years)

If you keep this mortgage for more than 5 years without refinancing or selling, buying points was mathematically sound. If you sell, move, or refinance before year 5, you paid $7,000 and got back less than $7,000 in savings.

Why Most Buyers Shouldn't Buy Points

The average first-time buyer holds their first mortgage for 5–8 years before selling or refinancing. This makes the break-even calculation the critical variable — and the news is mixed.

If your break-even is 48–60 months, you're essentially betting you won't move or refinance for 4–5 years. Some buyers can make that bet confidently. Others are buying a starter home in a city they might not stay in, or they're in a career phase where relocation is plausible.

There's also the opportunity cost of that $7,000. At 7% mortgage rates, $7,000 applied directly to the principal saves approximately $16,000 in lifetime interest and pays off the loan months early. That's a better return per dollar than the $116/month in payment savings from buying points — unless you hold the loan for well over a decade.

When Buying Points Does Make Sense

Points make mathematical sense when:

1. Your break-even is short. In a competitive rate environment where lenders offer aggressive point-to-rate conversions (0.375% per point instead of 0.25%), the monthly savings are higher and break-even arrives faster.

2. You're staying long-term. A 30-year fixed rate on a forever home with no plans to refinance or sell for 10+ years gives points a long runway to compound their savings. If you hold 20+ years, the total interest savings from a lower rate are substantial.

3. Rates are falling. This sounds counterintuitive — if rates are falling, why lock in now? But if you expect rates to drop further and plan to refinance within 2–3 years, buying points is destructive. If you believe rates will stay elevated or rise, locking in a lower rate now via points has strategic value.

4. You're optimizing on monthly payment not total cost. Some buyers need to reduce their monthly payment to qualify or to free up cash flow. Points can solve a DTI problem — paying $5,250 to buy down your rate enough to qualify for the loan you need. In this case, the decision isn't purely financial.

5. Tax deductibility applies. In the US, points paid on a primary home purchase (not refinance) are generally fully deductible in the year they're paid, provided you itemize and meet IRS requirements. This effectively reduces the real cost of 2 points from $7,000 to approximately $5,320 for a buyer in the 24% tax bracket — shortening the break-even period.

The Refinancing Wrinkle

If you buy points and then refinance within a few years, the calculation becomes painful. You spent $7,000 in year one to get a lower rate — and then you gave up that rate (and the remaining months of savings you hadn't yet recouped) to refinance at a new rate.

On a refinance, points paid on the original loan are deducted over the life of the loan for tax purposes, not all at once. So a refinance also changes the tax treatment retroactively.

Bottom line: if there's any meaningful probability you refinance in the next 3–5 years — either because rates might drop or because your financial situation might change — don't buy points.

UK and Australian Equivalent: Product Fees

In the UK, the equivalent to discount points is the "product fee" or "arrangement fee" charged by lenders offering lower fixed rates. A 5-year fix at 4.50% with a £1,499 product fee vs. a 5-year fix at 4.67% with £0 fee is structurally identical to the US points decision.

The break-even analysis is the same: divide the fee by the monthly savings to find your payback month. The wrinkle is that UK buyers typically remortgage every 2–5 years when their fixed term expires, making the product fee break-even calculation over the specific fixed period — not the full 25-year amortization.

In Australia, lenders don't typically use a US-style points system, but borrowers can pay establishment fees or offset them against rate. The same break-even logic applies.

Running Your Numbers

Before your lender meeting, prepare these inputs:

• Loan amount
• Rate with no points
• Rate offered if you buy 1 point, and if you buy 2 points
• How many years you realistically expect to hold this mortgage

Then divide the cost of points by the monthly payment savings. If the result is significantly shorter than your planned holding period, consider buying. If it's close or longer, skip the points and keep your cash.

The Mortgage Math & Affordability Calculator Toolkit includes a discount points break-even worksheet that calculates the exact month you recover the upfront cost, the total savings at 5, 10, and 30 years, and a side-by-side comparison of points vs. investing that $7,000 as a principal payment instead.