15 vs 30 Year Mortgage: Which Is Better? (2026)

Same loan, two very different totals

The 15 year loan costs more each month because you compress the same principal into half the payments, but lenders usually offer a lower rate on it, and less time means far less interest. Here is a 360,000 dollar loan both ways.

Worked example: $360,000 loan (2026 rates)

30 year at 6.5 percent, monthly$2,275
15 year at 5.75 percent, monthly$2,989
Extra per month on the 15 year$714
Total interest, 30 year$459,160
Total interest, 15 year$178,106
Interest saved with the 15 year$281,054

The 15 year costs 714 dollars more a month but saves over 281,000 dollars in interest and clears the debt fifteen years sooner.

When the 30 year is the smarter choice

Lower interest is not always the best use of money. The 30 year wins when:

The lower payment is what makes the home affordable at all.
You would invest the 714 dollar difference at a higher expected return than your mortgage rate.
You value the flexibility to pay the lower amount in a tight month and pay extra in a good one.
You want to keep more cash for an emergency fund or retirement contributions.

A popular middle path is to take the 30 year for its low required payment, then voluntarily pay extra toward principal in the months you can (a biweekly payment plan is one easy way). You keep the safety of the small payment and still knock years off the loan.

When the 15 year is the smarter choice

The 15 year wins when the higher payment fits comfortably and you value certainty over flexibility. You lock in a lower rate, build equity fast, and are debt free in half the time, which is powerful if the payoff lands near retirement. The risk is that the higher required payment is fixed: if your income drops, you cannot fall back to a smaller amount the way a 30 year borrower can.

Frequently asked questions

Why is the 15 year rate lower?

Shorter loans are less risky for the lender and price in less long term uncertainty, so 15 year rates typically run about half a point to three quarters of a point below 30 year rates.

Can I just pay a 30 year off in 15 years?

Yes, and many people do. You will pay the higher 30 year rate, so the interest savings are smaller than a true 15 year loan, but you keep the flexibility to drop back to the lower required payment whenever you need to.

Does a 15 year mortgage build equity faster?

Much faster. More of every payment goes to principal from day one, and the shorter term means the balance falls quickly, so you reach 20 percent equity and remove PMI sooner.

Which saves more money overall?

The 15 year, by a wide margin, because you borrow for half as long at a lower rate. On a typical loan the lifetime interest difference runs into the hundreds of thousands of dollars.