Mortgage Points Calculator

Read the calculator result

A mortgage points calculator compares two fixed-rate offers with the same loan amount and term: one at a baseline rate and another at a lower rate with an additional cash cost. The decision depends on how much the payment falls, how long you expect to keep the loan, and what happens to the remaining balance. A payment-only break-even calculation is useful, but it doesn’t tell the whole financing-cost story.

Use two actual, comparable quotes when making a purchase or refinance decision. The example rates are assumptions, not current market offers. Keep the loan amount, term, rate-lock conditions, and other charges aligned so that the difference you’re testing really comes from the rate-and-points choice.

Mortgage points: what a point buys depends on the offer

One discount point is a cost equal to 1% of the loan amount. It isn’t a promise of a particular interest-rate reduction. The CFPB’s guidance on points and lender credits explains that the relationship between upfront cost and rate varies. Ask the lender to show the actual price of each rate option rather than assuming one point always reduces the rate by a fixed fraction.

Enter the quoted baseline rate and the quoted rate with points separately. Enter the points as a percentage of the loan amount. If the lower-rate choice also has another additional cash cost, enter that difference in other upfront costs. Include only incremental costs attributable to this comparison, not all closing costs that both offers share.

This tool assumes points and the additional cost are paid in cash. Financing them changes the loan amount and future interest, so it’s a different comparison. A lender-credit offer can also change both rate and upfront cash. Don’t force a negative cost into this cash-paid-points model to represent a deal it doesn’t describe.

How the calculator works

The horizon is the number of months you expect to keep the mortgage before selling, refinancing, or paying it off. It isn’t necessarily the time you expect to own the home. Refinancing replaces the loan and can end the period over which its lower rate benefits you, even when you remain in the property.

No calculator can predict your move date or whether a future refinance will be available. Test several plausible horizons. A short stay can make an upfront payment difficult to recover; a longer stay gives the lower rate more time to reduce interest. The result should support a decision under uncertainty rather than depend on one optimistic future event.

Keep enough cash for closing and the expenses that follow moving. Money paid for points is no longer available for repairs or reserves. The tool measures financing costs; it doesn’t assign a value to liquidity or calculate what the cash might earn elsewhere.

Two useful measures answer different questions

For each offer, the mortgage points calculator uses the standard monthly amortization formula: payment = P × r ÷ [1 − (1 + r)⁻ⁿ], where P is principal, r is annual contractual rate divided by 1,200, and n is months. At zero interest, payment is P ÷ n. Upfront cost equals principal multiplied by the points percentage, plus other entered incremental cash costs.

Simple payment break-even equals upfront cost divided by monthly payment savings. It asks when accumulated payment reductions equal the initial cash outlay. It does not account for the difference in the loan balances. If the lower-rate offer creates no positive monthly savings, a finite payment-recovery period is not meaningful.

Net financing-cost savings at the selected horizon equals baseline interest paid minus lower-rate interest paid minus the upfront cost. The same result can be expressed as cumulative payment savings plus the reduction in remaining principal, minus upfront cost. This second measure recognizes that some benefit is retained as a smaller debt balance rather than as extra cash in your checking account.

Mortgage points calculator example: one point on a $300,000 loan

Assume a $300,000 principal and 360 monthly payments. Compare an illustrative baseline rate of 6.5% with a quoted alternative of 6.25% costing one point, or $3,000. Other incremental upfront costs are zero. The example doesn’t imply that one point normally buys this rate reduction.

At 60 months, cumulative payment savings are about $2,943.15, slightly less than the $3,000 paid upfront. The lower-rate loan also leaves about $821.21 less principal. Combining the cash savings and smaller balance, then subtracting the points, produces $764.36 of net financing-cost savings. Baseline interest is about $94,605.18, compared with $90,840.82 for the lower-rate loan.

Why the two results can appear to disagree

The example has positive net financing-cost savings at five years even though payment savings alone haven’t quite recovered the points. There’s no contradiction. The payment-only measure asks about cash recovered through smaller bills. The financing-cost measure also recognizes debt that no longer needs to be repaid. These are distinct ways to evaluate the same schedules.

The simple break-even figure of 61.16 months means the cash-payment savings first exceed the cost after the 62nd whole monthly payment, under the model. It doesn’t mean a payment occurs at a fractional date. Likewise, the positive five-year financing-cost result isn’t a claim that $764.36 of extra cash is sitting in your bank account.

If you sell or refinance at the horizon, the remaining principal affects the payoff obligation. That’s why comparing both balances matters. If immediate cash flexibility is your main concern, the payment-recovery view may deserve more weight. The calculator presents both so you can see the tradeoff explicitly.

Compare the complete quotes

Points are only one line in a mortgage offer. Compare other origination charges, lender credits, mortgage insurance, rate-lock terms, and any costs that differ between proposals. The CFPB’s Loan Estimate explanation can help you find the relevant disclosures. A lower quoted rate with larger unrelated fees may be less attractive than the points-only result suggests.

Use the contractual interest rate in the payment inputs. APR includes certain costs and can provide another comparison measure, but entering it as the amortization rate would mix separate concepts. For this model, enter the rate and the incremental upfront cost in their own fields.

Ask whether both quotes were prepared for the same credit profile, property, down payment, occupancy, and lock period. A comparison assembled from different assumptions can attribute a price difference to points when another feature actually caused it. Record the quote dates as well, because an offer obtained at a different time may reflect a different pricing environment.

Keep the cash requirement visible in your notes: the incremental points cost, other differing charges, and cash left after closing. A favorable lifetime-interest figure can’t pay an unexpected repair bill next month. If paying points would eliminate the reserve you intended to keep, compare a smaller points purchase or the baseline offer before deciding.

Don’t include property taxes or homeowners insurance in the payment savings between otherwise identical loans. Those ownership costs don’t disappear because you purchased points. Use the mortgage payment calculator to build a broader monthly housing estimate, and the cash-to-close calculator to check the cash needed for the transaction.

What the estimate excludes

The comparison assumes fixed rates, the same original principal and term, and scheduled monthly payments with no extra principal. It doesn’t calculate tax deductions, investment opportunity cost, inflation, financed points, or future changes to the loan. Tax treatment depends on circumstances and isn’t included as an assumed benefit.

Extra payments can shorten the period during which the lower rate generates savings. A sale before the chosen horizon can do the same. Changes in the interest-rate market don’t alter a fixed-rate schedule already modeled, but they may affect your future choices. Re-run the comparison when the quotes or your expected holding period change.

The refinance break-even calculator addresses the separate decision of replacing an existing mortgage. Use it when the old loan has a remaining balance and term that differ from the new proposal, rather than treating two newly originated loans as though they describe the existing debt.

Mortgage points calculator questions

Does one point reduce the rate by 0.25 percentage points?

There’s no universal conversion. One point describes the upfront price as a percentage of principal. Enter the actual rate reduction offered by the lender for that price.

Can I add the points to my loan?

This calculator assumes a cash payment. Financing the cost changes principal and interest and requires a comparison that includes the larger balance. Ask the lender for that version of the quote.

Why is my net savings positive before simple break-even?

The lower-rate loan can leave a smaller principal balance as well as a lower payment. Net financing-cost savings includes both effects. Simple break-even counts only the accumulated payment reduction.

Should I always choose points if I plan to stay longer?

A longer horizon can help the arithmetic, but the price of the rate reduction, available cash, other fees, and the possibility of replacing the mortgage still matter. Compare realistic scenarios rather than treating time in the home as the only factor.