How Much House Can I Afford on a $100,000 Salary?

On a $100,000 salary you can typically afford a home between $300,000 and $400,000. Your gross monthly income of $8,333 means the 28% rule gives you a maximum housing payment of $2,333 per month. At a 6.75% rate with 20% down, this supports a purchase price of approximately $340,000.

Here is the detailed breakdown for a $340,000 home: with 20% down ($68,000), your loan amount is $272,000. At 6.75% for 30 years, the monthly principal and interest is $1,764. Property tax adds roughly $283 per month (1% of home value) and insurance adds $142 per month. Total: $2,189 per month — comfortably under the $2,333 limit with a small buffer.

At $100k income, lenders will often approve you for more than you should actually spend. Banks routinely approve borrowers at 43% DTI, which on a $100k salary allows up to $3,583 in total monthly debt. If you have minimal other debt, a lender might approve you for a $450,000 home. This is a trap. Just because a bank will lend you the money does not mean you can comfortably afford the payment. The 28% rule exists precisely because the bank's maximum approval often exceeds what you can sustain without financial stress.

The opportunity cost analysis matters more at this income level. A $100k earner putting 20% down on a $400,000 home ties up $80,000 that could be invested. At 8% annual return, that $80,000 grows to $172,000 in 10 years. Meanwhile, PMI on a 10% down payment costs roughly $200 per month. Whether to put 10% or 20% down is not obvious — you need to run both scenarios and compare total cost including investment returns on the money you keep.

Tax implications also shift at $100k. Your marginal federal tax rate is 22%, meaning your $272,000 mortgage generates meaningful interest deductions in early years. In the first year, approximately $18,200 of your payments goes to interest. If you itemize deductions (which requires total deductions exceeding the $15,000 standard deduction), this mortgage interest deduction saves you roughly $4,000 in federal taxes. This effectively reduces your after-tax housing cost by $333 per month.

Common mistakes at the $100k income level: buying the most expensive home the bank approves rather than a comfortable amount, choosing a 15-year mortgage to save interest when the higher payment creates cash flow stress, ignoring HOA fees which can add $200-600 per month in condo and planned communities, and underestimating how much lifestyle inflation happens after buying.

The wisest approach at $100k: buy a home at or below 3x your annual income ($300,000), put 20% down if possible, and invest the difference between your actual payment and the maximum you could afford. This builds wealth two ways simultaneously — home equity appreciation and investment portfolio growth.

Use our free mortgage calculator to see exactly how different price points, down payments, and rates affect your monthly payment.

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 income creates financial stress.

How much house can two people earning $100k total afford? Combined $100k household income follows the same rules: approximately $300k-$400k. Two incomes provide more stability but the math is identical.

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

What are closing costs on a $340k house? Typically 2-5% of purchase price: $6,800 to $17,000. These are due at closing on top of your down payment.

Should I get a 15-year or 30-year mortgage at $100k salary? A 30-year mortgage with extra payments gives you flexibility. The 15-year mortgage saves interest but locks you into a higher required payment.