Financial decision
The 15-year term saves an enormous amount of interest. It also removes the flexibility that keeps households out of trouble.
Run the numbers and the 15-year loan looks obviously better: a lower rate and less than half the lifetime interest. Then look at what it does to your monthly obligation and your qualifying ratios, and the picture becomes a genuine trade-off rather than an obvious answer.
At a glance
A fully amortizing loan repaid over 180 months. The rate is typically lower, the payment is substantially higher, and equity builds fast from month one.
A fully amortizing loan repaid over 360 months. The lowest required payment among standard products, with the highest total interest if held to term.
| Factor | 15-Year Mortgage | 30-Year Mortgage |
|---|---|---|
| Interest rate | Lower | Higher |
| Monthly payment | Substantially higher | Lowest of the two |
| Total interest paid | Far less | Far more |
| Equity growth | Fast from year one | Slow for the first decade |
| Qualifying impact | Lowers your maximum price | Raises your maximum price |
| Flexibility if income drops | Low — payment is fixed and high | High — you can always pay extra |
You can always turn a 30-year loan into a 15-year loan by paying extra. You cannot turn a 15-year loan back into a 30.
Plain English first, then the rule as it is published, then what it means for your file.
“The monthly housing expense used in qualifying includes principal and interest based on the actual terms of the mortgage being originated.”
Choosing a 15-year term directly reduces the loan amount you can qualify for. Two buyers with identical income can be approved for very different prices based on term alone.
Your income is stable and well above the payment, you have a funded emergency reserve, and you want to own the home outright on a defined date — often before retirement or before tuition begins.
You want reserve capacity, your income varies, you are buying near the top of your comfort range, or you can invest the payment difference with discipline.
The 15-year loan is cheaper. The 30-year loan is safer. A common middle path is a 30-year note with a self-imposed 20-year payoff schedule — most of the savings, none of the forced obligation.
Standard agency loans have none. You can send extra principal any month, and the servicer must apply it as directed.
Not by itself. Mortgage insurance is driven by your down payment and program, not by the term — though shorter terms do reach the cancellation threshold sooner.
The interest savings on a 15-year loan compound over decades. Over five years the difference is far smaller, which usually favors the flexibility of the 30-year term.
Every rule stated on this page is traceable to the agency handbook that governs it. Guidelines change — confirm anything time-sensitive with a licensed loan officer before acting on it.
Reviewed by Brian Mix, licensed loan officer (NMLS #111175) · Last checked July 2026.
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