15-Year Fixed vs 30-Year Fixed Mortgage
Last updated July 2026
15-Year Fixed Mortgage
Faster payoff, lower rate, higher monthly payment
Advantages
- Rate typically 0.50-0.75% lower than 30-year fixed
- Pay off the loan in half the time
- Build equity dramatically faster
- Total interest paid can be 60-70% less than 30-year on the same loan
- Frees you from mortgage debt earlier
Drawbacks
- Monthly payment 30-50% higher than 30-year on the same loan
- Less monthly cash flow flexibility
- Qualifies you for a smaller loan amount
- Ties up more disposable income in the mortgage
30-Year Fixed Mortgage
The default American mortgage: lower payment, higher rate, 30-year payoff
Advantages
- Lower monthly payment than 15-year on the same loan
- More cash flow flexibility for investing, saving, or emergencies
- Qualifies you for a larger loan amount
- You can always pay extra to accelerate payoff without penalty
- Buffer against income disruptions
Drawbacks
- Rate typically 0.50-0.75% higher than 15-year
- Pays significantly more total interest over the life of the loan
- Builds equity slower in early years
- Locks in higher rate for a longer term
The 15-year and 30-year fixed mortgages are the two most common home loans in the U.S. The 15-year has a lower rate but higher monthly payment and faster equity buildup. The 30-year has a higher rate but much lower payment and more monthly cash flow flexibility. Cash flow discipline versus payoff speed usually decides it.
Feature Comparison
| Feature | 15-Year Fixed Mortgage | 30-Year Fixed Mortgage |
|---|---|---|
| Rate Structure | Fixed for 15 years | Fixed for 30 years |
| Common Loan Terms | 15-year only | 30-year (also 20-year less common) |
| Interest Rate | Typically 0.50-0.75% below 30-year | Typically 0.50-0.75% above 15-year |
| Rate Adjustment Schedule | Never, rate is locked | Never, rate is locked |
| Payment Predictability | 100% predictable | 100% predictable |
| Payoff Speed | Full payoff in 15 years | Full payoff in 30 years (extra payments allowed) |
| Total Interest Paid | 60-70% less than 30-year on same loan | 2-3x the interest of 15-year on same loan |
| Qualifying Loan Amount | Lower loan amount due to higher payment | Higher loan amount due to lower payment |
Too Close to Call
15-year wins for disciplined buyers with strong income who value payoff speed and interest savings. 30-year wins for buyers who value flexibility, want to invest the difference, or need cash-flow buffer.
The classic financial-advice line is 'take the 30-year and invest the difference,' which pencils out well when the market beats mortgage rates net of taxes. In practice, most buyers don't actually invest the difference, they spend it, in which case the 15-year forces the savings and builds real wealth via equity. Choose 15-year if you're confident you'd otherwise not invest the difference. Choose 30-year if you'll actually invest it or need the cash flow flexibility.
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