10% vs 20% down payment
$491.93/month difference in monthly payment
$56,094 difference in total interest
10% down: $2,627.35 a month. 20% down: $2,135.42 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. Payment shown is principal, interest and PMI (0.75% of the loan a year until 78% loan-to-value) on a $400,000 price. An average, not an offer.
Side by side
| 10% down | 20% down | |
|---|---|---|
| Amount borrowed | $360,000 | $320,000 |
| Rate | 7.03% | 7.03% |
| Monthly payment | $2,627.35 | $2,135.42 |
| Paid off in | 30 years | 30 years |
| Total interest | $504,845 | $448,751 |
| Total PMI | $26,100 | $0 |
Questions
Which has the lower monthly payment?
20% down, by $491.93 a month ($2,627.35 vs $2,135.42).
Which costs less overall?
20% down saves $56,094 in interest ($504,845 vs $448,751).
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. Payment shown is principal, interest and PMI (0.75% of the loan a year until 78% loan-to-value) on a $400,000 price.
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.
- PMI assumption: 0.75% of the loan a year below 20% down. Typical range 0.5–1.5% (Urban Institute, Freddie Mac); ends at 78% of the original value under the Homeowners Protection Act (CFPB).
Numbers on this page last changed September 26, 2026. How they are calculated: methodology.