15-Year vs 30-Year Mortgage: Key Differences Explained
Compare 15-year and 30-year mortgage terms to see how loan length affects your monthly payment and total interest paid.
Quick Answer
Pick 15 years to save on interest and build equity fast; pick 30 years for lower monthly payments and more cash flow.
| Feature | 15-Year Mortgage | 30-Year Mortgage |
|---|---|---|
| Higher monthly payments | Lower monthly payments | |
| Much less total interest paid | Significantly more total interest paid | |
| Build equity faster | Slower equity buildup | |
| Typically lower interest rate | Typically higher interest rate | |
| Less financial flexibility month-to-month | More cash flow for other investments |
A 15-year mortgage lets you own your home outright in half the time and saves tens of thousands in interest. The trade-off is a considerably higher monthly payment that can limit your budget flexibility.
A 30-year mortgage is America's most popular loan term because the lower payment makes homeownership accessible. However, you pay far more in total interest over the life of the loan.
When to Use 15-Year Mortgage
- You can comfortably afford the higher payment
- You want to minimize total interest paid
- You are close to retirement and want to be debt-free
When to Use 30-Year Mortgage
- You need a lower monthly payment to qualify
- You want to invest the payment difference elsewhere
- You prefer maximum financial flexibility
Worked Example
A $300,000 loan at 6% (15-yr) vs 6.5% (30-yr).
15-Year Mortgage
15-year: $2,532/month, total interest $155,683.
30-Year Mortgage
30-year: $1,896/month, total interest $382,633.
The 15-year costs $636 more per month but saves $226,950 in interest.
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Frequently Asked Questions
Can I pay off a 30-year mortgage in 15 years?
Yes, by making extra principal payments, but you will still carry the higher 30-year rate.
Which has a lower interest rate?
15-year mortgages typically offer rates 0.25-0.75% lower than 30-year mortgages.
Does a shorter term mean less house?
Possibly. The higher payment reduces how much you qualify for under debt-to-income guidelines.