Your paycheck tells a story — but it doesn't tell the whole one. Here's how to figure out your real home buying budget before you fall in love with a listing.
Most first-time buyers fixate on their gross income when trying to figure out what they can afford, then get blindsided when a lender comes back with a number that feels completely disconnected from reality. The truth is, salary is just the starting point. What you actually qualify for depends on a handful of financial ratios, your debt load, your down payment, and the interest rate environment you're buying into.
With mortgage rates still elevated compared to the historic lows of 2020–2021, getting this math right before you fall in love with a home is more critical than ever.
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The 28/36 Rule: The Oldest Affordability Formula That Still Works
Lenders and financial advisors have leaned on the 28/36 rule for decades — and for good reason. It's simple, conservative, and has kept a lot of buyers out of trouble.
28% — Your monthly mortgage payment (principal, interest, taxes, and insurance — PITI) should not exceed 28% of your gross monthly income.
36% — Your total monthly debt payments (mortgage + car loans + student loans + credit cards) should not exceed 36% of your gross monthly income.
Real Example
You earn $75,000/year — that's $6,250/month gross.
28% rule → $1,750 max housing payment
36% rule → $2,250 max total debt payments
If you already pay $400/month on a car and $200/month in student loans, your actual mortgage room drops to $1,650 — not $1,750. That gap can mean $20,000+ less in purchase price.
Debt-to-Income Ratio: What Lenders Actually Look At
When you apply for a mortgage, your lender will calculate your debt-to-income ratio (DTI) — and this number carries more weight than your credit score in many cases. It's simply your total monthly debt obligations divided by your gross monthly income, expressed as a percentage.
Most conventional loans want to see a DTI of 43% or below. FHA loans can sometimes stretch to 50%, but that comes with trade-offs. The lower your DTI, the more house you can realistically qualify for.
What counts toward your DTI?
Minimum credit card payments
Auto loan payments
Student loan payments (even if deferred — lenders often use 1% of the balance)
Personal loan and other monthly obligations
Child support or alimony
Your proposed new mortgage payment (including taxes and insurance)
What doesn't count: utilities, groceries, subscriptions, or insurance premiums. Those hit your real budget hard every month, but they don't factor into lender calculations — which is why many buyers technically qualify for more than they can comfortably live on.
⚠️ Common Mistake
Many first-time buyers calculate DTI without including property taxes and homeowner's insurance — both of which are typically wrapped into your monthly payment through escrow. Always use your full PITI payment, not just principal and interest, or your estimate will be off by hundreds per month.
Salary-to-Home Price: Quick Reference Benchmarks
Use these as a starting range. Your actual number shifts based on down payment, existing debts, credit score, and current interest rates.
Annual Salary
Estimated Home Price Range
Max Monthly Payment
$50,000
$150,000 – $185,000
~$1,167
$75,000
$225,000 – $275,000
~$1,750
$100,000
$300,000 – $370,000
~$2,333
$125,000
$375,000 – $460,000
~$2,917
$150,000
$450,000 – $550,000
~$3,500
Assumes 3–5% down, ~7% rate, 28% housing ratio. Taxes and insurance not included. Use the calculator above for your actual number.
Down Payment Size Changes Everything
The size of your down payment doesn't just affect your loan amount — it affects your monthly payment, your interest rate, and whether you'll owe Private Mortgage Insurance (PMI).
Put down less than 20% on a conventional loan, and you're typically looking at PMI — usually 0.5% to 1.5% of the loan amount annually. On a $300,000 loan, that's $1,500 to $4,500 per year added to your housing costs. Sometimes putting 10% down instead of 5% eliminates PMI entirely and actually lowers your monthly payment enough to qualify for a higher purchase price.
What Salary Rules Miss: The Real Cost of Homeownership
The 28% rule doesn't tell you that owning a home costs significantly more than your mortgage payment. Budget-conscious buyers often forget to account for:
Property taxes — Vary wildly by state. New Jersey averages over 2% of home value annually; Alabama is under 0.5%.
Homeowner's insurance — Typically $1,000–$2,500/year, though coastal and high-risk areas can run much higher.
HOA fees — Can range from $100 to $1,000+/month. Often completely overlooked by first-time buyers.
Maintenance and repairs — Budget 1% of home value per year. On a $300,000 home, that's $250/month that never appears on your mortgage statement.
A buyer earning $80,000 a year might technically qualify for a $280,000 home. But if property taxes are high in their area and they're buying an older property, stretching to that limit could leave them financially exposed within the first year. Affordability isn't just about qualifying — it's about staying comfortable after you close.
Using the 28% rule, your maximum housing payment is around $1,400/month. Depending on your debts, down payment, and local tax rates, that typically translates to a purchase price in the range of $175,000–$220,000 at current rates. Use the affordability calculator above to plug in your actual numbers.
Does my gross or net income determine mortgage affordability?
Lenders use gross income (before taxes) to calculate DTI and qualifying amounts. But when budgeting for what you can comfortably afford day-to-day, run your numbers against your net take-home pay — because that's what you'll actually be paying with each month.
Can I afford a house if I have student loans?
Yes — but your student loan payments count toward your DTI and reduce how much mortgage you can qualify for. If you're on an income-driven repayment plan, ask your lender specifically how they're calculating the student loan portion, as it can vary significantly between loan types.
What credit score do I need to buy a house in 2026?
Most conventional loans require a minimum score of 620, though you'll get noticeably better rates with 740 or above. FHA loans allow scores as low as 580 with a 3.5% down payment. The difference between a 680 and a 760 credit score can translate to 0.5–1% in interest rate — which adds up to tens of thousands over a 30-year loan.
Is the 3x salary rule still a reliable guide for home buying?
The old "buy a home that costs 3x your annual income" rule is outdated in most markets. At 2026 interest rates, a more accurate range is 2.5x to 4x your salary — with your DTI, existing debts, and down payment determining where in that range you land.
Know Your Number Before You House Hunt
Scroll back up and use the free calculator — enter your income, debts, and down payment to get a purchase price ceiling based on your real financial picture.