Quick answer
With 20% down and a 6.5% 30-year mortgage, a $400,000 house needs about $107,398 in gross annual income. The estimated monthly housing cost is $2,506 before HOA dues or unusual local fees. That's about $26,849/year more than a $300,000 house needs. For context, the required income is about 1.4x the roughly $75,000 US median household income.
That monthly cost breaks down to roughly $2,023 in principal & interest on the $320,000 loan, plus about $367/month in estimated property tax and $117/month in estimated insurance.
$400,000 house income table
This table shows the approximate gross annual income needed at common down payments and mortgage rates, using a 28% housing debt-to-income guideline.
| Down payment | 5.5% rate | 6.0% rate | 6.5% rate | 7.0% rate | 7.5% rate |
|---|---|---|---|---|---|
| 3.5% down | $122,914 | $128,169 | $133,548 | $139,046 | $144,656 |
| 5% down | $121,326 | $126,498 | $131,794 | $137,206 | $142,729 |
| 10% down | $116,030 | $120,931 | $125,948 | $131,075 | $136,307 |
| 15% down | $110,735 | $115,363 | $120,101 | $124,944 | $129,886 |
| 20% down | $98,582 | $102,938 | $107,398 | $111,956 | $116,607 |
| 25% down | $93,716 | $97,799 | $101,980 | $106,253 | $110,613 |
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Open affordability calculatorHow the estimate works
- Mortgage: 30-year fixed principal and interest on the $320,000 loan (20% down) comes to about $2,023/month on this $400,000 house.
- Property tax: estimated at 1.1% of the home price - about $367/month here.
- Insurance: estimated at 0.35% of the home price - about $117/month here.
- PMI: estimated when the down payment is below 20%.
- Income rule: housing cost should stay near or below 28% of gross monthly income - 28% of the $107,398 required here is about $2,506/month, matching the total monthly cost above.
Lower the income required
On this $400,000 house specifically: dropping the rate from 7.5% to 5.5% lowers the required income by about $18,024/year, and raising the down payment from 3.5% to 25% lowers it by about $31,568/year (smaller loan, and PMI drops off at 20%). You can also compare the payment directly on the $400,000 mortgage payment table.
This table focuses on income, down payment, mortgage rate, property tax, insurance, PMI and housing debt-to-income math.