CalculynWhat is the monthly payment on a $800k mortgage?
At a 6.5% interest rate on a 30-year fixed loan, a $800,000 mortgage costs about $5,057 a month in principal and interest. Property tax, insurance and PMI usually add more on top.
Monthly payment by rate
Principal and interest only. Example rates for 2026, not a quote.
| Rate | 30-year | 20-year | 15-year |
|---|---|---|---|
| 5.5% | $4,542 | $5,503 | $6,537 |
| 6% | $4,796 | $5,731 | $6,751 |
| 6.5% | $5,057 | $5,965 | $6,969 |
| 7% | $5,322 | $6,202 | $7,191 |
| 7.5% | $5,594 | $6,445 | $7,416 |
Total interest paid
| Rate | 30-year total interest | 15-year total interest |
|---|---|---|
| 5.5% | $835,232 | $376,600 |
| 6% | $926,706 | $415,154 |
| 6.5% | $1,020,356 | $454,395 |
| 7% | $1,116,071 | $494,313 |
| 7.5% | $1,213,738 | $534,898 |
Income needed
A common guideline keeps housing costs under 28% of gross monthly income. At 6.5% over 30 years, a $800,000 loan suggests an income of roughly $270,886 a year, assuming taxes and insurance add about 25% to the payment.
How it's calculated
Monthly payment = P × r ÷ (1 − (1 + r)^−n), where P is the loan amount, r the monthly rate (annual rate ÷ 12) and n the number of monthly payments.
Change the numbers →
Open the Mortgage Calculator with these values filled in.
These figures are educational estimates, not financial advice.
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