A 15-year mortgage saves you a large amount of interest and builds equity fast, but the monthly payment is far higher; a 30-year mortgage keeps payments low and flexible while costing much more interest over time. The one-sentence answer: choose a 15-year term only if the bigger payment fits comfortably with room to spare, and otherwise take the 30-year and pay extra when you can. The math is not the whole story here, because cash-flow safety matters more than squeezing out every dollar of interest. This is general information, not personalized advice; verify your own numbers with a lender before you decide.
How the two terms compare
The core trade-off is interest paid versus monthly payment and flexibility. On a hypothetical 300,000 dollar loan, the 15-year option might run around half a percentage point lower in rate, but the payment is much larger because you are compressing the payoff into half the time.
| Feature |
15-year mortgage |
30-year mortgage |
| Monthly payment |
Higher, roughly 40 to 50 percent more |
Lower, easier on cash flow |
| Interest rate |
Usually lower, often about 0.5 percent less |
Usually higher |
| Total interest paid |
Much less over the life of the loan |
Much more |
| Equity buildup |
Fast |
Slow in early years |
| Flexibility |
Locked into a high payment |
Low required payment, pay extra optionally |
| Best for |
Stable high income, near retirement |
Most buyers, variable income |
The figures above are illustrative ranges, not quotes. Actual rates depend on credit, down payment, and the lender.
Which should you choose?
Use this decision rule rather than chasing the lowest interest total:
- Run the 15-year payment first. If it fits with a healthy margin after savings and essentials, it is a strong option.
- If the 15-year payment feels tight, take the 30-year. A smaller required payment is a safety feature, not a weakness.
- Want the best of both? Take the 30-year and make extra principal payments. You capture much of the interest savings while keeping the ability to drop back to the low payment in a hard month.
- Near retirement and want to be debt-free? The 15-year fits that goal well, assuming the payment is comfortable.
- Carrying high-interest debt or no emergency fund? Fix those first; do not lock into a 15-year payment yet.
A useful sanity check: would you rather guarantee interest savings, or keep flexibility and possibly invest the difference? Both are reasonable; there is no universally correct answer. If you are still saving the down payment, see how much to save for a house before locking in any term.
What to skip
- Skip the 15-year if it drains your emergency cushion. A missed mortgage payment is far costlier than a few extra years of interest.
- Skip the assumption that a 30-year is wasteful. Disciplined extra payments can close most of the gap on your own schedule.
- Skip points and fancy products you do not understand. Compare plain rate, term, and total cost first.
- Skip rate-shopping with only one lender. Even a small rate difference compounds over a long term.
FAQ
Is a 15-year mortgage always cheaper overall?
In total interest, yes, it is usually much cheaper. But cheaper-in-interest is not the same as better-for-you if the payment strains your budget.
Can I just pay extra on a 30-year loan instead?
Yes. Extra principal payments on a 30-year loan capture much of the savings while keeping a low required payment as a fallback. Confirm there is no prepayment penalty.
Do 15-year mortgages have lower rates in 2026?
Generally they carry a somewhat lower rate than 30-year loans, often around half a percentage point, but the exact gap moves with the market and your profile.
Which builds equity faster?
The 15-year, clearly. More of each payment goes to principal from the start, so you own your home outright much sooner.
Where to go next
How to get a mortgage, mortgage vs rent, and paying off your mortgage vs investing.