How Much House Can I Afford on a $100K Salary?

On a $100,000 salary with a 20% down payment, manageable debt, and a 6.75% mortgage rate, you can comfortably afford a home priced between $300,000 and $400,000. With minimal existing debt you can stretch toward $450,000, but anything above $400,000 starts pushing beyond the 28% housing cost threshold that financial advisors and lenders use as the standard for affordability.

Your gross monthly income at $100,000 is $8,333. The 28% rule says your total housing payment — including mortgage principal, interest, property tax, homeowners insurance, and PMI if applicable — should stay under $2,333 per month. At 6.75% on a 30-year mortgage with 20% down, that $2,333 budget supports a purchase price of approximately $340,000. The math: $340,000 home, $68,000 down payment, $272,000 loan, $1,764 monthly P&I, $283 property tax ($340K times 1% divided by 12), $142 insurance — total $2,189. That sits comfortably under the $2,333 ceiling with a $144 monthly buffer.

The 36% rule — your second guardrail — says total monthly debt payments including housing should stay under $3,000 on a $100K salary. If you have a $400 car payment and $250 in student loan minimums, that $650 in existing debt reduces your available housing budget from $2,333 to $2,350 ($3,000 minus $650). In this case, the housing ratio still works at $340,000 because your front-end number ($2,189) is under $2,333. But if your existing debt is $1,000 per month, your back-end maximum housing payment drops to $2,000 — reducing your affordable price to roughly $290,000.

Here is what different price points look like on $100K with 20% down at 6.75%. At $300,000: P&I $1,556, total housing $1,953 (23.4% of income — very comfortable). At $350,000: P&I $1,816, total $2,264 (27.2% — comfortable). At $400,000: P&I $2,076, total $2,576 (30.9% — stretching). At $450,000: P&I $2,336, total $2,886 (34.6% — house-poor territory). The sweet spot is $320,000 to $380,000, where you have enough room for maintenance surprises, retirement contributions, and life. Use the [mortgage calculator](/calculators/mortgage) to run the exact math with your specific numbers.

At $100K income, lenders will often approve you for far more than you should spend. Banks routinely approve borrowers at 43 to 45% DTI, which would allow a $480,000 to $520,000 home on $100K. This is a trap. Just because a bank will lend you the money does not mean you can sustain the payment without sacrificing retirement savings, emergency reserves, and quality of life. The 28% rule exists because decades of data show that households exceeding it face significantly higher rates of financial stress, missed payments, and foreclosure.

One important consideration at the $100K level: opportunity cost. Putting $80,000 down on a $400,000 home ties up capital that could be invested. At 8% annual return, $80,000 grows to $172,700 in 10 years. Whether to put 10% or 20% down depends on comparing PMI cost (typically $150 to $250 per month on a $360K loan) versus investment returns on the retained cash. For many $100K earners, putting 10% down and investing the difference produces a higher net worth over 10 years than putting 20% down — even after accounting for PMI. For more on this tradeoff, read our guide on [how much to put down on a house in 2026](/blog/how-much-down-payment-house-2026).

If you are earlier in your career and currently earning less, our guides on [house affordability at $60K](/blog/how-much-house-afford-60k-salary) and [at $80K](/blog/can-i-afford-400k-house-80k-salary) walk through the same analysis at lower income levels. Use the [affordability calculator](/calculators/can-i-afford) for a personalized verdict on any price point.

Frequently Asked Questions:

Can I afford a $500K house on $100K salary? Only with an unusually large down payment (30%+), very low interest rate, and no other debt. For most people, $500K on $100K creates financial stress with 35%+ of income going to housing.

What if my spouse also earns $100K? Combined $200K household income changes the math dramatically — you can comfortably afford $600K to $800K using the same 28% rule. Combined income is what lenders use for qualification.

Is it better to buy a cheaper house and invest the rest? Often yes. Buying at 2.5x income instead of 3.5x and investing the monthly difference has historically produced higher total net worth over 20 years than maximizing home purchase price.

How much do I need saved to buy on $100K salary? For a $350K home: $70K down (20%) plus $10K to $17K closing costs plus a $15K emergency fund buffer. Total: $95K to $102K ideal. At minimum: $12K FHA down plus $10K closing costs.

Should I get a 15 or 30-year mortgage at $100K? A 30-year gives flexibility — you can always pay extra. A 15-year at $350K saves approximately $150K in interest but requires $2,700+ per month, leaving less room in the budget.