Mortgage on a $400,000 House
Put 20% down on a $400,000 home with a 30-year fixed loan at 6.8%, and the monthly payment lands around $2,086/month. Here's how that number breaks down.
Total cost over 30 years
| Item | Amount |
|---|---|
| Total payments (30 years) | $375,509 |
| Principal (loan amount) | $160,000.0 |
| Total interest paid | $215,509 |
| Down payment | $80,000 |
| Total cost of home | $415,509 |
Down payment scenarios
| Down Payment | Amount | Loan Amount | Monthly Payment |
|---|---|---|---|
| 5% | $20,000 | $380,000 | $2,477 |
| 10% | $40,000 | $360,000 | $2,347 |
| 20% | $80,000 | $320,000 | $2,086 |
| 25% | $100,000 | $300,000 | $1,956 |
What income do you need?
Qualifying for that $2,086/month payment under the standard 28% rule takes at least $7,450/month gross ($89,400/year) — a range that fits professionals earning $90k–$120k, or dual-income households pulling in $75k combined. Carrying $500/month in other debt pushes the qualifying income up to roughly $95k.
Some lenders lean on the 36% total-debt rule instead. Car loans, student loans, and credit card minimums all push the required income higher. Try the home affordability calculator for a number tailored to your actual debts.
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What a $400,000 Mortgage Actually Costs Per Month
$400,000 on the listing doesn't tell the whole story. Principal, interest, property tax, homeowners insurance, and — below 20% down — PMI all stack into the real monthly number. Leaving any of those out means underestimating what the mortgage actually costs each month.
A 6.75% rate on a 30-year loan with 20% down ($80,000 down, $320,000 borrowed) puts principal and interest at roughly $2,076/month. Layer in typical property tax and homeowners insurance and total PITI lands near $2,676/month — though property tax swings widely by state and county.
Monthly Payment Breakdown
| Component | 20% Down ($80,000) | 10% Down + PMI |
|---|---|---|
| Principal & Interest | $2,076/mo | $2,335/mo |
| Property Tax (est. 1.2% rate) | $400/mo | $400/mo |
| Homeowners Insurance | $200/mo | $200/mo |
| PMI (est. 0.85%) | — | $255/mo |
| Total PITI | $2,676/mo | $3,162/mo |
Treat these as estimates, not guarantees. Annual property tax runs under 0.5% of home value in states like Hawaii and Alabama, and over 2% in New Jersey, Illinois, or Texas. Your actual bill comes down to your county's assessment and millage rate.
Income Required for a $400,000 Home
Lenders generally want PITI to stay within 28%–36% of gross monthly income. For this $400,000 home with 20% down, that translates to roughly $95,571–$114,686/year in gross income. Drop to 10% down and add PMI, and the requirement climbs to $112,929–$135,514/year.
Total debt-to-income — every debt, not just the mortgage — usually caps out at 43%–45% for lenders. Meaningful student loan, auto, or credit card payments eat into the mortgage amount you'd actually qualify for at any income level.
Total Interest Over 30 Years
A $320,000 loan at 6.75% racks up roughly $427,185 in interest across 30 years, putting the true cost of the home — down payment plus every payment made — around $827,185. That gap is exactly why even modest extra principal payments pay off: an extra $400/month toward principal shaves 4–5 years off the loan and saves tens of thousands in interest.
15-Year vs. 30-Year Mortgage
Switch to a 15-year term at a typical 6.0%–6.25% rate and the monthly P&I jumps to about $2,788 — well above the 30-year payment of $2,076. But total interest falls from roughly $427,185 to about $181,771, a $245,414 difference. Whether that higher monthly payment fits your budget is what decides which term makes sense.
Down Payment Options
| Down Payment | Loan Amount | PMI Required | Monthly P&I (est.) |
|---|---|---|---|
| 3.5% FHA ($14,000) | $386,000 | Yes (MIP) | $2,504 |
| 5% ($20,000) | $380,000 | Yes | $2,465 |
| 10% ($40,000) | $360,000 | Yes | $2,335 |
| 20% ($80,000) | $320,000 | No | $2,076 |
Closing Costs on a $400,000 Home
Closing costs typically run 2%–4% of the purchase price — $8,000–$16,000 on top of the down payment itself. For a 20% down scenario, that puts total cash needed at closing somewhere between $88,000 and $96,000. Plan for this well ahead of making an offer.
Where a $400,000 Home Fits in Your Budget
A $400,000 purchase is often a middle-ground target: large enough that taxes, insurance, and maintenance materially affect affordability, but still within reach for buyers who have a solid income and meaningful savings. The key is to evaluate the full ownership cost rather than focusing only on the $2,076 principal-and-interest estimate.
Test the payment against take-home pay
With estimated PITI near $2,676 per month, the housing payment alone could consume a large share of net income after payroll taxes, retirement contributions, and other deductions. Add utilities, maintenance, HOA dues, and commuting costs before deciding that the lender's approval amount is comfortable.
Protect the emergency fund
A 20% down payment is $80,000, and estimated closing costs add another $8,000–$16,000. Do not use every dollar available to reach the 20% threshold. Keeping several months of expenses after closing can be more valuable than eliminating PMI if the alternative leaves no reserve for repairs or job changes.
$400,000 Buyer Checklist
- Cash target: plan for roughly $88,000–$96,000 at closing with 20% down, plus an emergency reserve.
- Payment stress test: run the home at a rate 0.5%–1% above your quoted rate and see whether the budget still works.
- County-level costs: replace the sample tax and insurance figures with quotes for the exact property.
- Maintenance reserve: set aside about $333–$500 per month based on a 1%–1.5% annual maintenance budget.
- Offer discipline: leave room for inspection findings, moving expenses, and the first year of ownership.
Common $400,000 Home-Buying Mistakes
Using the down payment as the entire savings plan
Putting $80,000 down does not mean the purchase is fully funded. Closing costs, prepaid taxes, moving, furnishing, and early repairs can require additional cash. A buyer who reaches 20% down but has no reserve may be less financially secure than a buyer who puts 15% down and retains a healthy emergency fund.
Comparing homes by price instead of total monthly cost
Two $400,000 homes can have very different carrying costs. A higher-tax county, expensive insurance market, HOA fee, or older roof can change affordability more than a small difference in the mortgage rate.
Assuming a $400,000 approval is a $400,000 comfort level
Lenders use underwriting ratios and gross income. Your personal budget should use take-home income and include goals such as retirement saving, travel, childcare, or paying down other debt.
Related Calculators
- Mortgage Calculator — custom rate, term, and down payment scenarios.
- Home Affordability Calculator — what price range your income supports.
- Closing Costs Calculator — estimate total cash needed at closing.
- Refinance Calculator — when to refinance if rates change after purchase.
- Property Tax Calculator — look up rates for your specific county.
Frequently Asked Questions
What income do I need to afford a $400,000 home?
Covering $2,676/month in PITI (20% down, 6.75% rate) takes roughly $114,686–$100,350/year in gross income under the 28%–32% PITI-to-income guideline — assuming no other major debt. Existing student loans or car payments would lower the mortgage amount that income supports.
How much do I need saved before buying a $400,000 home?
On the low end: a 3.5% FHA down payment ($14,000), plus 2%–4% closing costs ($8,000–$16,000), plus 3–6 months of reserves after closing — realistically $34,028–$42,056 all in. With 20% down instead, that range shifts to $100,028–$108,056.
Is $400,000 a lot for a house?
It comes down to the local market. $400,000 sits close to the 2024 median US home price of roughly $420,000 — a studio in San Francisco, but a full 4-bedroom suburban home in much of the Midwest. There's no national answer, only a local one.
What credit score do I need for a $400,000 mortgage?
620 is typically the floor for conventional loans, 580 for FHA with 3.5% down. But a genuinely competitive rate — the gap between 6.5% and 7.25% on this loan size is $107/month — usually calls for a 720+ score, with the very best pricing reserved for 760+.
How long does it take to pay off a $400,000 mortgage?
Standard terms run 30 or 15 years. Adding one extra payment a year on a 30-year loan trims it down to roughly 26 years and cuts a meaningful chunk of interest. Biweekly payments — half the payment every two weeks, which works out to 13 full payments a year — achieve much the same thing automatically.
Key Takeaways
Buying a $400,000 home takes more planning than just the sale price: cash for the down payment and closing costs, income that covers the full PITI payment (not merely principal and interest), and a reserve for ongoing maintenance. The monthly payment itself is a straightforward function of rate and down payment — model your specific scenario with this calculator, then check that the resulting number actually fits your real monthly budget once taxes, existing debt, and savings goals are accounted for, not just a lender's DTI ceiling.