15-Year vs 30-Year Mortgage: Which Should You Choose?
The choice between a 15-year and 30-year mortgage shapes your monthly payment and the total interest you'll pay. This guide compares both with worked examples, showing how much interest a 15-year loan saves and when a 30-year makes more sense.
When you take out a US home loan, one of the biggest decisions is the term: 15-year vs 30-year mortgage. It affects your monthly payment, the total interest you'll pay over the life of the loan, and how quickly you build equity. This guide compares both options with real worked examples so you can choose the term that fits your budget and goals.
You can model both terms side by side in our US Mortgage Calculator. Below, we explain the trade-offs.
15-year vs 30-year mortgage: the core trade-off
The trade-off is simple to state and important to understand:
- A 30-year mortgage spreads repayment over 360 months, giving you a lower monthly payment but much more total interest.
- A 15-year mortgage repays in 180 months with a higher monthly payment but far less total interest, and you own the home outright twice as fast.
Fifteen-year loans also usually come with a slightly lower interest rate, because they're less risky for the lender — adding to the savings.
Worked example: $250,000 loan
Imagine borrowing $250,000. Suppose the 30-year rate is 6.5% and the 15-year rate is 5.8%. Here's roughly how they compare:
| Term | Monthly payment (P&I) | Total interest paid |
|---|---|---|
| 30-year at 6.5% | ≈ $1,580 | ≈ $319,000 |
| 15-year at 5.8% | ≈ $2,080 | ≈ $125,000 |
The 15-year payment is about $500 a month higher — but it saves roughly $194,000 in interest over the life of the loan and clears the debt 15 years sooner. That's the power of both a shorter term and a lower rate working together.
When a 30-year mortgage makes sense
Despite the higher total interest, a 30-year loan is the right choice for many buyers:
- Lower payments improve cash flow — leaving room for other goals, emergencies or investing.
- Flexibility — you can always pay extra toward a 30-year loan to shorten it, but you can't reduce a 15-year payment in a tight month.
- Investing the difference — if you can earn more by investing the $500/month difference than your mortgage rate, a 30-year loan may leave you wealthier. This is where compound interest matters.
When a 15-year mortgage makes sense
A 15-year loan suits you if you can comfortably afford the higher payment and value being debt-free sooner. It's especially attractive for buyers who want to own their home outright before retirement, or who dislike carrying debt. The forced discipline of a higher required payment also guarantees you build equity fast — no willpower required.
A middle path: 30-year loan, 15-year payments
Many buyers split the difference: take the flexible 30-year loan, but voluntarily pay extra each month as if it were a 15-year loan. This gives you the lower required payment as a safety net, while still slashing interest if you keep up the overpayments. Just confirm your loan has no prepayment penalty first. Before committing to any payment level, make sure it fits your take-home pay — see our guide to US paycheck deductions.
Frequently asked questions
Is a 15-year or 30-year mortgage better?
A 15-year mortgage saves enormously on interest and builds equity faster, but has higher monthly payments. A 30-year mortgage has lower payments and more flexibility. The best choice depends on your budget and whether you'd invest the monthly difference.
How much interest does a 15-year mortgage save?
On a $250,000 loan, a 15-year term can save roughly $190,000 in interest compared with a 30-year term, thanks to both the shorter schedule and a typically lower interest rate.
Why is the 15-year interest rate lower?
Shorter loans are less risky for lenders, so they usually offer a slightly lower rate on 15-year mortgages than on 30-year ones, adding to the interest savings.
Can I pay off a 30-year mortgage early?
Yes, as long as your loan has no prepayment penalty. Many borrowers take a 30-year loan for flexibility but pay extra each month to clear it faster, effectively creating their own shorter term.
Should I choose a 30-year loan and invest the difference?
It can leave you wealthier if your investment returns exceed your mortgage rate over time. It requires discipline to actually invest the difference rather than spend it, and returns are never guaranteed.
This article was last reviewed in 2026. Figures are illustrative for guidance only — always confirm terms with a licensed mortgage lender.