Tool

Home Affordability Calculator

See the maximum home price and monthly PITI payment that fits your income, debts, and down payment — using real per-state property tax data.

Affordability calculator

Built on the 28/36 rule used by U.S. mortgage lenders. Adjust any input and your results update instantly.

Your finances

State

Property tax: 0.75%/yr (California)


Loan terms

Interest rate6.85%
2.00%12.00%
Down payment$60,000
$0$250,000
Loan term30 years
10 years30 years
You can afford up toDTI 36%
$473,000

Estimated monthly payment $3,150 on a $413,000 loan.

Conservative
$402,000
Recommended
$473,000
Stretch
$520,000
See what mortgage this means

Monthly payment breakdown

Monthly
$3,150
  • Principal & Interest$2,70686%
  • Property Tax$2969%
  • Homeowners Insurance$1485%

Want more buying power?

A 1% lower interest rate on this scenario raises your max price by roughly $40,000. Paying off $200/mo of debt adds about $27,000 more.

Understanding home affordability

Home affordability isn't just about what a bank will lend you — it's about what fits your real-life budget without crowding out savings, retirement, and the unexpected.

What is home affordability?

Affordability is the maximum home price you can comfortably purchase based on your income, recurring debts, down payment, and the cost of the loan itself. The headline number most calculators surface is the price at which your total monthly housing cost — principal, interest, taxes, and insurance, or PITI — stays inside a healthy share of your gross monthly income.

How mortgage lenders calculate affordability

Conforming lenders typically apply the 28/36 rule: housing costs shouldn't exceed 28% of gross monthly income (the front-end ratio), and total debt payments — housing plus credit cards, auto loans, and student loans — shouldn't exceed 36% (the back-end ratio). Government-backed loans like FHA can stretch as high as 43–50%, but stretching to the maximum is rarely advisable.

Underwriters also stress-test your file against the actual mortgage rate, property taxes for your county, homeowners insurance, mortgage insurance if you put less than 20% down, and HOA dues. Our calculator mirrors that math and solves for the highest home price that keeps you within your target DTI.

What is debt-to-income (DTI) ratio?

DTI is the share of your gross monthly income that goes toward debt payments. A DTI under 36% is considered healthy; 37–43% is workable but tighter; above 43% and you'll have a harder time qualifying for the best rates. Lowering your DTI is the single fastest way to raise the price a lender will approve.

Tips to increase buying power

  • Pay down revolving debt. Eliminating a $300/mo card payment can add roughly $50,000 to your approved price at current rates.
  • Boost your credit score. Moving from a 680 to a 760+ tier typically lowers your rate by 0.5–0.75%, worth tens of thousands over the loan.
  • Save a larger down payment. Reaching 20% eliminates PMI and shrinks the loan balance you're paying interest on.
  • Consider a 2-1 buydown or rate lock float-down. These short-term rate reductions can meaningfully expand budget in a high-rate environment.
  • Shop at least three lenders. The CFPB finds borrowers save an average of $1,500+ over the life of the loan by collecting multiple Loan Estimates.

Mortgage tips that actually move the needle

Practical guidance from the underwriting playbook — no fluff.

Target a back-end DTI below 36%

It keeps room for retirement contributions, emergencies, and the lifestyle costs that come with owning vs. renting.

Keep 3–6 months of PITI in reserves

Lenders love it, and you'll sleep better. Reserves beyond the down payment make appraisal gaps and repairs survivable.

Budget for ~1% of home price per year

That's a realistic ongoing maintenance line item most first-time buyers miss when they stretch to their max price.

Get a fully underwritten pre-approval

Stronger than a pre-qualification — sellers treat it like cash, and you'll know your true ceiling before you tour.

Affordability by state

Same household — $120k income, $60k down, $450/mo debts — shown against each state's average 30-year rate and effective property tax. Insurance and HOA held constant.

#StateAvg 30-yr rateProperty taxMax home priceMonthly payment
01California6.92%0.75%$470,000$3,146/mo
02Texas6.88%1.81%$422,000$3,148/mo
03Florida6.95%0.91%$461,000$3,148/mo
04New York6.86%1.72%$427,000$3,153/mo
05Illinois6.90%2.27%$403,000$3,147/mo
06Georgia6.83%0.92%$465,000$3,150/mo
07North Carolina6.81%0.82%$471,000$3,151/mo
08Arizona6.87%0.63%$479,000$3,152/mo

Illustrative averages — actual rates and tax assessments vary by lender, credit profile, and county.

How much house can you actually afford?

"How much can I afford" has two very different answers: the number a lender will approve you for, and the number you can comfortably live with. They're rarely the same. A lender looks at ratios on paper; it doesn't know about your car payment stress, your savings goals, or how much cushion helps you sleep at night. This tool aims at the second number — what actually fits your life — not just the maximum a bank will sign off on.

The 28/36 rule, and why it's a starting point, not a law

Most affordability math is built on two ratios lenders use. The front-end ratio says your housing payment should stay around 28% of your gross monthly income. The back-end ratio says all your debt payments together — housing plus car loans, student loans, credit cards — should stay near 36%. These are useful guardrails, but they're maximums, not targets. Plenty of people are approved at these limits and end up house-poor, with a home they technically qualified for but can't comfortably afford once real life shows up. Treat the ratios as a ceiling to stay under, not a goal to hit.

Gross income lies a little

Affordability rules use gross income — what you earn before taxes and deductions. But you pay your mortgage with take-home pay, which can be 20-30% lower after federal tax, state tax, Social Security, Medicare, and things like health insurance and retirement contributions. A payment that looks fine against your gross salary can feel much tighter against what actually lands in your account. This is why a realistic affordability number leaves room — and why it's worth checking your actual take-home pay before deciding what you can spend.

The down payment changes everything

Your down payment does more than lower the loan amount. Below 20% down, you'll pay PMI, which adds to the monthly cost. A larger down payment shrinks the loan, removes PMI, and lowers your monthly payment on two fronts at once. But there's a real tradeoff: draining your entire savings into a down payment to avoid PMI can leave you with no emergency fund, which is its own kind of risk. The healthiest position is usually enough down to keep the payment manageable while still keeping months of expenses in reserve. Adjust the down payment above and watch how the affordable price and the monthly payment move together.

Where you buy quietly reshapes the number

Two buyers with identical incomes can afford very different homes depending on location. Property tax rates swing from under 0.6% of home value per year in some states to over 2% in others, and homeowners insurance has risen sharply in coastal and disaster-prone areas. Those recurring costs eat into the same monthly budget that would otherwise go toward the mortgage itself — so in a high-tax, high-insurance state, the home price you can afford is meaningfully lower for the same paycheck. Selecting your state above folds these real local costs into the estimate.

The costs that don't show up in the ratio

Lender ratios cover the mortgage payment, but owning a home costs more than the payment. Maintenance runs roughly 1% of the home's value per year as a rule of thumb — a $400,000 home means budgeting around $4,000 annually for repairs and upkeep that a renter never sees. Add closing costs upfront, potential HOA dues, higher utility bills than an apartment, and the furniture and fixes a new place always seems to need. A home you can afford on paper but that leaves nothing for these realities isn't truly affordable. Building a buffer for them is what separates a comfortable purchase from a stressful one.

How to use this number

The figure above is a realistic ceiling, not a shopping target. A few honest ways to use it: shop below your maximum, not at it, so you have room for the costs the ratio ignores. If the affordable number is lower than you hoped, the levers are clear — raise your down payment, pay down existing debt to free up your back-end ratio, or look at areas with lower property taxes. And before you commit, pressure-test the monthly payment against your actual take-home pay and your other goals. The best home isn't the most expensive one you can get approved for; it's the one that still lets you live the rest of your life.

Frequently asked questions

How accurate is this home affordability calculator?

It uses the standard amortization formula and the 28/36 lender DTI rule, the same math underwriters use. Real loan approval also depends on credit score, employment history, and the specific lender's overlays, but the price range here is a strong working estimate.

What's the difference between pre-qualification and pre-approval?

Pre-qualification is a soft, self-reported estimate. Pre-approval involves verified documentation — pay stubs, W-2s, bank statements, a credit pull — and is what sellers and agents take seriously when you make an offer.

Should I put 20% down?

20% removes PMI and lowers your monthly payment, but it isn't required. FHA loans go as low as 3.5%, conventional loans as low as 3%, and VA/USDA loans can be 0%. The right number balances PMI cost, cash reserves, and your investment alternatives.

How much house can I afford on $100k a year?

With typical debts of ~$400/mo, $50k down, a 6.85% rate on a 30-year term, and average property taxes, most $100k earners can comfortably afford a home in the $330k–$360k range. Our calculator gives you a personalized number in seconds.

Does the calculator include PMI?

Not yet — it intentionally focuses on PITI plus HOA so the output mirrors most lender 'maximum home price' tools. If your down payment is under 20%, plan for roughly 0.5–1.5% of the loan amount per year in PMI on top of the monthly payment shown.

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