15 vs 30-year mortgage calculator
What you'd borrow.
7.4% average, October 15, 2026.
6.71% average, October 15, 2026.
A year, if you invested the difference instead.
A 15-year loan saves
$301,842
in interest on $334,000, and the house is paid off 15 years sooner. The cost is $636 more a month: $2,948 instead of $2,313. After 15 years on the 30-year loan you would still owe $250,999.
15-year at 6.71%
- Monthly payment
- $2,948
- Total interest
- $196,675
- Total paid
- $530,675
- Payments
- 180
30-year at 7.4%
- Monthly payment
- $2,313
- Total interest
- $498,517
- Total paid
- $832,517
- Payments
- 360
Year-by-year table
| After year | 15-year owes | 30-year owes |
|---|---|---|
| 1 | $320,627 | $330,860 |
| 2 | $306,328 | $327,480 |
| 3 | $291,040 | $323,842 |
| 4 | $274,694 | $319,924 |
| 5 | $257,216 | $315,707 |
| 6 | $238,529 | $311,167 |
| 7 | $218,549 | $306,279 |
| 8 | $197,186 | $301,017 |
| 9 | $174,345 | $295,352 |
| 10 | $149,924 | $289,253 |
| 11 | $123,812 | $282,688 |
| 12 | $95,893 | $275,619 |
| 13 | $66,042 | $268,010 |
| 14 | $34,125 | $259,818 |
| 15 | $0 | $250,999 |
| 16 | $0 | $241,504 |
| 17 | $0 | $231,283 |
| 18 | $0 | $220,279 |
| 19 | $0 | $208,433 |
| 20 | $0 | $195,679 |
| 21 | $0 | $181,950 |
| 22 | $0 | $167,169 |
| 23 | $0 | $151,256 |
| 24 | $0 | $134,125 |
| 25 | $0 | $115,683 |
| 26 | $0 | $95,828 |
| 27 | $0 | $74,453 |
| 28 | $0 | $51,442 |
| 29 | $0 | $26,670 |
| 30 | $0 | $0 |
What if you took the 30-year loan and invested the difference?
Both plans spend $2,948 a month for 30 years. The 15-year borrower invests the whole payment once the house is paid off; the 30-year borrower invests the $636 difference from day one. At 6% a year, by year 30:
- 15-year plan invested
- $845,872
- 30-year plan invested
- $619,446
- Ahead by
- $226,426 (15-year)
Investing the difference only wins if it earns more than 8.99% a year after taxes and fees, every year, and you actually invest it.
15 vs 30-year mortgage calculator by Points Frog ↗ · An educational estimate, not financial advice.