15-year vs 30-year mortgage
$598.19/month difference in monthly payment
$252,678 difference in total interest
15-year: $2,600.15 a month. 30-year: $2,001.96 a month.
Source: Freddie Mac PMMS averages for the week of September 24, 2026: 30-year 7.03%, 15-year 6.42%. 20-year loans are priced at the 30-year average. An average, not an offer.
Side by side
| 15-year | 30-year | |
|---|---|---|
| Amount borrowed | $300,000 | $300,000 |
| Rate | 6.42% | 7.03% |
| Monthly payment | $2,600.15 | $2,001.96 |
| Paid off in | 15 years | 30 years |
| Total interest | $168,026 | $420,704 |
Questions
Which has the lower monthly payment?
30-year, by $598.19 a month ($2,600.15 vs $2,001.96).
Which costs less overall?
15-year saves $252,678 in interest ($168,026 vs $420,704).
What rates are these figures based on?
Freddie Mac PMMS averages for the week of September 24, 2026: 30-year 7.03%, 15-year 6.42%. 20-year loans are priced at the 30-year average.
Can I compare a different amount?
Yes: change the amount above and press Compare. The page recalculates with the same rates.
Sources
- 30-year fixed mortgage average: 7.03%. Freddie Mac Primary Mortgage Market Survey (PMMS), series MORTGAGE30US, as of September 24, 2026; retrieved September 26, 2026.
- 15-year fixed mortgage average: 6.42%. Freddie Mac Primary Mortgage Market Survey (PMMS), series MORTGAGE15US, as of September 24, 2026; retrieved September 26, 2026.
Numbers on this page last changed September 26, 2026. How they are calculated: methodology.