Mortgage Analysis
Monthly Payment on a $300,000 Home
With a 20% down payment ($60,000) at a 6.67% interest rate, a $300,000 home has a monthly principal and interest payment of $1,544 on a 30-year mortgage, or $2,021 on a 15-year mortgage.
Latest rate: 6.67% (30-yr) / 5.97% (15-yr) from Freddie Mac via FRED for week of 2026-08-13 | Principal and interest only — excludes taxes, insurance, and private mortgage insurance | Use the live calculator to enter your exact rate
Monthly (30-yr)
$1,544
20% down | 6.67% rate
Monthly (15-yr)
$2,021
20% down | 5.97% rate
Total Interest (30-yr)
$315,802
over life of loan
Breakdown by Down Payment
Monthly principal and interest only at 6.67% (30-yr) and 5.97% (15-yr) | Freddie Mac data via FRED for week of 2026-08-13
| Down Payment | Down Amount | Loan Amount | 30-yr Payment | 15-yr Payment |
|---|---|---|---|---|
| 3% | $9,000 | $291,000 | $1,872 | $2,451 |
| 5% | $15,000 | $285,000 | $1,833 | $2,400 |
| 10% | $30,000 | $270,000 | $1,737 | $2,274 |
| 20% | $60,000 | $240,000 | $1,544 | $2,021 |
The Inflation Connection
Mortgage rates are closely tied to inflation. When inflation runs high, the Federal Reserve raises interest rates to cool the economy — which pushes mortgage rates up and increases your monthly payment. A 1-point rate increase on a $240,000 loan adds approximately $162 to your monthly payment. Tracking inflation helps you understand where mortgage rates may be headed.
Get a Live Rate Estimate
The figures above use the latest weekly rate from Freddie Mac (6.67% as of 2026-08-13). Use the full calculator to enter your exact home price, down payment, and loan term — with the rate pre-filled from the Federal Reserve each week.
Open Live Calculator →Other Home Prices
Data Source
Mortgage rate uses the 30-year fixed-rate average published weekly by Freddie Mac via the Federal Reserve Bank of St. Louis (FRED series MORTGAGE30US), last updated week of 2026-08-13. The 15-year rate is estimated at approximately 0.7 percentage points below the 30-year rate, consistent with the typical spread. Figures are principal and interest only — property taxes, homeowners insurance, and private mortgage insurance are excluded. fred.stlouisfed.org | Money & Prices