How Much Income Do You Need for a $400K Mortgage?
Wondering what salary you need to qualify for a $400,000 mortgage? This guide breaks down the income required at different rates, debt loads, and down payments — plus the real difference between qualifying and comfortably affording.
Quick answer
To comfortably afford a $400,000 mortgage with the 28% rule, you typically need a household income of about $100,000–$120,000 per year — slightly less if you have minimal debt.
The short answer
To comfortably afford a $400,000 mortgage at today's ~6.5% rates, most lenders want to see annual household income of about $100,000–$120,000 — assuming moderate other debts and a 20% down payment on a ~$500K home.
Using the 28% front-end DTI rule, the full PITI payment of about $3,100/month requires gross monthly income of around $11,000 — or $132,000/year for a stress-free fit.
How lenders calculate the income requirement
Two ratios drive the decision:
- Front-end DTI (housing only): PITI ≤ 28% of gross monthly income
- Back-end DTI (all debts): total debts ≤ 36–43% of gross monthly income
On a $400K loan at 6.5% over 30 years, principal and interest is about $2,528/month. Add $400 for property taxes, $150 for insurance, and you're at roughly $3,078/month — needing $11,000+ gross monthly income for the 28% rule.
Income required at different interest rates
- 5% rate: ~$95,000 income for $400K mortgage
- 6% rate: ~$105,000 income for $400K mortgage
- 6.5% rate: ~$110,000 income for $400K mortgage
- 7% rate: ~$117,000 income for $400K mortgage
- 8% rate: ~$130,000 income for $400K mortgage
Rate moves of 0.5% can shift the required income by $5,000–$8,000/year. This is why locking a rate matters.
How debt changes the picture
- $0 monthly debts → ~$110,000 income needed
- $400 car payment → ~$125,000 income needed
- $800 in monthly debts → ~$140,000 income needed
Every $100/month in existing debt requires roughly $4,000–$5,000 more annual income to qualify comfortably.
Down payment effect on income required
A bigger down payment shrinks the loan and the income requirement:
- 10% down: $400K loan → income required ~$110K
- 20% down: $400K loan → still ~$110K (but no PMI = lower payment)
- Or buy a $500K home with $100K down: $400K loan, same as above
Lender max vs comfortable max
Lenders may approve a $400K mortgage at $90K income using the 36% back-end limit. That works for the bank but leaves almost nothing for retirement, kids, or repairs. Most planners recommend buying at 20–25% of gross income, not the maximum approval.
Tips to qualify faster
- Pay down credit cards and small loans before applying
- Boost your credit score above 740 for better rates
- Increase your down payment to lower the loan amount
- Document any extra income (bonuses, side gigs) over 2 years
- Shop multiple lenders — qualification standards vary
Use the calculator
Find your comfortable mortgage size
Enter your salary, debts, and down payment to see your exact range.
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Frequently Asked Questions
What salary do I need to qualify for a $400K mortgage?
About $100,000–$120,000 in household income for a comfortable fit at 6.5% rates. Some lenders approve at $85K–$90K but you'll be at the upper end of DTI limits.
Can I buy a $500K house with a $400K mortgage?
Yes — that's a 20% down payment on a $500K home, which avoids PMI and gives you the lowest possible monthly payment for that loan size.
What credit score is needed?
620 minimum for conventional, 740+ for the best rates. FHA loans go down to 580 with 3.5% down, but jumbo loans (typically over $766K) often require 700+.
What about FHA on a $400K loan?
FHA loans are capped by county — most US counties cap at $498K, so a $400K FHA loan is usually allowed. You'll need 3.5% down and pay mortgage insurance.
How does income affect interest rate?
Indirectly — through credit score, DTI, and reserves. Higher income with lower DTI and strong credit gets the best rates.
Should I buy at the maximum I qualify for?
Almost never. Buy at 20–25% of gross income, not the lender's 36% maximum. The cushion protects you from job loss, repairs, and rate changes.