15-Year vs 30-Year Mortgage
The single biggest decision after choosing your loan type is the term. A 15-year and 30-year mortgage on the same home can differ by hundreds of thousands of dollars in total interest. Here's how to pick.
Side-by-Side Example ($300,000 loan)
| Feature | 15-Year Fixed | 30-Year Fixed |
|---|---|---|
| Approx. Interest Rate | 5.75% | 6.25% |
| Monthly Payment (P&I) | $2,486 | $1,847 |
| Total Interest Paid | $147,538 | $364,945 |
| Total of Payments | $447,538 | $664,945 |
| Equity After 5 Years | $80,400 | $31,500 |
| Payoff Year | 15 | 30 |
Example only. Your rate and payment will vary. Use our 15-Year Calculator and 30-Year Calculator for exact numbers.
15-Year Mortgage: Pros and Cons
- Pros: Lower total interest, faster equity buildup, lower rate, debt-free in half the time
- Cons: ~50% higher monthly payment, less cash flow flexibility, harder to qualify for
- Best for: High earners, low-debt borrowers, people who want a guaranteed return equal to their mortgage rate
30-Year Mortgage: Pros and Cons
- Pros: Lower monthly payment, more cash flow freedom, easier qualification, you can always pay extra principal
- Cons: Much more interest paid, slower equity buildup, longer debt commitment
- Best for: Buyers prioritizing cash flow, those with other high-interest debt to pay off, families with variable income
The Hidden Power of the 30-Year
Here's something many guides don't tell you: a 30-year mortgage is not a 30-year commitment. You can pay it off early by making extra principal payments, refinancing to a 15-year, or using lump sums (bonuses, tax refunds) toward principal.
The minimum payment is the floor, not the ceiling. If you take a 30-year and pay the same amount you'd pay on a 15-year, you'll pay it off in roughly 18-19 years and save most of the extra interest.
That flexibility has real value — especially if you want to invest the difference, build an emergency fund, or keep cash for home repairs. Use our Extra Payment Calculator to model the impact.
How to Decide
Ask yourself three questions:
- Can I comfortably afford the 15-year payment? If yes and you have no better use for the cash, take the 15-year.
- Do I want flexibility? If your income varies, you're investing aggressively, or you have other debt, the 30-year is the safer bet.
- What's my time horizon? If you might move in 5-7 years, the term barely matters — most of the difference is in the back half of the loan.
Frequently Asked Questions
Is a 15-year mortgage always better financially?
Not always. If you can earn more than your mortgage rate by investing the payment difference, the 30-year wins. Most people can't reliably beat 6-7% in the market, which is why 15-year mortgages are usually the math winner for disciplined savers.
Can I refinance from 30-year to 15-year later?
Yes. There's no prepayment penalty on most mortgages. Many borrowers refinance to a 15-year after 5-7 years when their income has grown.
Are 15-year rates really that much lower?
Yes — typically 50-75 basis points lower. Lenders prefer shorter-term loans because they're less exposed to rate changes and default risk.
What about a 20-year mortgage?
A 20-year sits between the two. Lower payment than 15, more interest than 15-year but less than 30-year. Worth considering if you want a middle path.