TERM COMPARISON

15-year vs 30-year mortgage: payment and interest.

At a $400,000 home, a 15-year loan’s required payment is about -$613/month higher than a 30-year loan’s, but saves about $288,552 in lifetime interest, using the Freddie Mac PMMS 30-year (7.4%) and 15-year (6.73%) average rates as of 10/8/2026.

A shorter term pays off faster and usually carries a lower note rate, so both effects compound: less time and a lower rate mean substantially less total interest paid over the life of the loan. The tradeoff is a higher required monthly payment, since the same loan amount is repaid over half the time. The table below shows both terms across nine home prices, all at 20% down and national-average property tax and insurance, so the tradeoff scales the same way at every price point.

15-year vs 30-year payment and interest by home price
Home price30-yr payment15-yr paymentMonthly differenceLifetime interest saved (15-yr)
$200k$1,497$1,803-$306$144,276
$250k$1,812$2,194-$383$180,345
$300k$2,126$2,585-$459$216,414
$350k$2,440$2,976-$536$252,483
$400k$2,755$3,367-$613$288,552
$500k$3,384$4,150-$766$360,690
$600k$4,013$4,932-$919$432,828
$750k$4,956$6,105-$1,149$541,035
$1 million$6,528$8,060-$1,531$721,380

Open the 30-year example Open the 15-year example

Source references: Tax Foundation: Property Taxes by State and County, 2026 Insurance.com: Average Homeowners Insurance Rates by State (2026)
Rate reference as of 10/8/2026. Educational software; no professional review claimed.

GOOD QUESTIONS

A few things you
might be wondering.

Is a 15-year mortgage always cheaper overall?

Usually in total interest, yes, because less time means less interest accrues and 15-year rates are typically lower. It is not cheaper month to month: the required payment is materially higher for the same loan amount.

Can I get a 15-year payoff on a 30-year loan?

You can prepay a 30-year loan enough to pay it off in about 15 years, which is flexible but is not the same as a 15-year loan’s typically lower rate. Model extra payments on the payoff calculator to compare.

Which term is right for me?

It depends on whether the higher required 15-year payment fits your budget with room for other goals. There is no single correct answer; compare both terms at your own price and rate.