How Much House Can I Afford on $100,000 a Year?
On a $100,000 salary, you could afford roughly a $369,159 home. That is based on the 28% rule — keeping housing costs at or below $2,333 a month — using an example 6.5% 30-year mortgage rate and a 20% down payment ($73,832). Change any of those and the number moves, so treat this as a starting point, not a limit.
The math on a $100,000 income
| Gross monthly income | $8,333 |
| Max housing payment — 28% rule | $2,333/mo |
| Example loan amount — 6.5%, 30 yr | $295,327 |
| Down payment — 20% | $73,832 |
| Estimated home price | $369,159 |
Assumes about 20% of the monthly payment covers property taxes and insurance. Rates change constantly — use today's rate below.
Adjust the assumptions to your situation
Uses the 28% front-end and 36% back-end rules, whichever is lower.
How home affordability is calculated
Lenders and financial planners use two guardrails together, known as the 28/36 rule. The front-end number says your monthly housing payment — principal, interest, property taxes, and insurance — should stay at or below 28% of your gross monthly income. The back-end number says all your debt payments combined (housing plus car loans, student loans, and minimum credit card payments) should stay under about 36%. Whichever limit is lower sets your budget.
For a $100,000 salary, gross monthly income is $8,333, so the 28% housing cap is about $2,333 a month. Working backward from that payment at an example 6.5% 30-year rate — and setting aside roughly a fifth of it for taxes and insurance — supports a loan near $295,327. Add a 20% down payment and the home price lands around $369,159.
What changes the number most
Three levers move your budget more than anything else. The interest rate: a higher rate means a bigger share of each payment goes to interest, shrinking the price you can afford. Your down payment: more cash down means a smaller loan for the same payment. Your other debts: a large car payment or student loan eats into the 36% back-end limit and can cap your budget below the 28% figure. The calculator above lets you test all three.
Buying on $100,000 a year when you are self-employed
I bought while running a restaurant, so I went through the version of this process that the calculators do not describe. If your income is W-2 and steady, most of what follows will not apply to you. If it is not, it will.
Budget for the gap between mortgage and cost of ownership. The payment is the part everyone plans for. Property tax, insurance, and maintenance are the part that arrives afterward, and on a $369,159 house they routinely add several hundred a month. My first year of ownership went about 30% over what I had modeled, entirely on things I had not thought to include. Keep a reserve separate from the down payment.
One thing worth knowing regardless: lenders weight consistency over size. Two steady years at $100,000 is treated better than one great year and one bad one that average to more. If you control how you pay yourself, that is a lever most owners never think to pull.
Frequently asked questions
How much house can I afford on $100,000 a year? Using the common 28% rule, your maximum monthly housing payment is about $2,333. At an example 6.5% 30-year rate with 20% down, that supports a home price around $369,159. A higher rate or smaller down payment lowers that figure.
What mortgage can I afford on $100,000? After a 20% down payment, the loan in this example is about $295,327. Your actual limit depends on your credit score, other debts, property taxes, and insurance in your area.
Is the 28% rule strict? It is a guideline, not a hard limit. Lenders also apply a back-end rule (total debt payments under about 36% of gross income). Keeping housing costs at or below 28% leaves more room for savings and other goals.
This is a general educational estimate, not a mortgage pre-approval or personalized financial advice. Rates, taxes, insurance, and lending rules vary. Confirm your real budget with a lender.
Method & source: based on the standard 28/36 debt-to-income guideline used by U.S. mortgage lenders, combined with a fixed-rate amortization formula. The headline figure uses an example 6.5% 30-year rate and 20% down; use the calculator above for your own numbers.
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