The basic trade-off
Both loans can have a fixed rate, so your principal and interest stays the same for the life of the loan. The difference is how fast you pay it back. A 15-year loan spreads the balance over 180 payments instead of 360. Each payment is bigger, but more of it goes to principal from the start, and you're debt-free sooner.
Lenders often price shorter terms at a lower rate, so a 15-year loan saves interest two ways: a lower rate and fewer years of interest.
On a $320,000 loan
Hypothetical example. Principal and interest only. APR may differ; example only. Rates change daily.
In this example, the 15-year loan costs about $625 more each month but saves around $260,000 in interest if you keep both loans to the end. Taxes, insurance and any mortgage insurance come on top of either payment.
- 30-year fixed at 6.75%: about $2,076 a month, and roughly $427,000 in total interest over the full term
- 15-year fixed at 6%: about $2,700 a month, and roughly $166,000 in total interest over the full term
Example details: $320,000 30-year fixed at 6.750% (6.778% APR): 360 monthly payments of $2,075.51; $320,000 15-year fixed at 6.000% (6.039% APR): 180 monthly payments of $2,700.34. Purchase price $400,000 with a $80,000 (20%) down payment. Principal and interest only; taxes and insurance not included, so the actual payment will be higher. Unless noted, APR assumes ZERO Closing Costs, no discount points and 15 days of prepaid interest. Hypothetical example prepared November 4, 2026, not a current CapCenter rate offer; subject to credit approval.
How the term affects what you can buy
Lenders look at your debt-to-income ratio, which compares your monthly debts, including the new house payment, with your gross monthly income. A higher payment uses more of that room. That means the same income usually qualifies for a smaller loan on a 15-year term than on a 30-year term.
If you're stretching to reach the home you want, a 30-year loan may be the only way to make the numbers work. If you're buying well below your limit, a 15-year term may fit easily.
When a 15-year loan can make sense
- You have steady income and a payment that still leaves room in your budget
- You already have an emergency fund and savings for repairs
- You want the home paid off before a goal, like retirement or college costs
- You're buying a less expensive home than you qualify for
When a 30-year loan can make sense
- You want the lowest required payment and more breathing room
- Your income varies, or you expect big expenses soon
- You'd rather keep extra cash for savings, investing or other goals
- You want the option to pay faster without being required to
The middle path: 30 years, paid faster
You can take a 30-year loan and send extra principal when you can. Even one extra payment a year can take years off the loan. Many common home loans don't have a prepayment penalty, but confirm your loan's terms. The 30-year rate is often higher, so you won't match the 15-year savings exactly, but you keep the lower required payment if money gets tight.
Other terms to consider
You don't have to choose only between 15 and 30 years. CapCenter offers fixed-rate loans in 30-, 25-, 20-, 15- and 10-year terms. A 20-year loan, for example, sits between the two in payment and total interest. You can price each term in our mortgage calculator.
