How Much House Can I Afford? Free Home Affordability Calculator (2026)

Distinct from refinance content — pure first-time-buyer and move-up-buyer affordability angle using the 28/36 rule, real 2026 rate examples, and state-by-state property-tax inputs.

By Editorial Team · Published February 25, 2026 · Updated April 29, 2026

How Much House Can I Afford? Free Home Affordability Calculator (2026)

Person looking at a small house model and reviewing affordability documents

The bank will tell you what you can borrow. That’s a different question from what you can afford. The pre-approval letter is based on your gross income and stated debts; it doesn’t know about your retirement contribution rate, your kids’ upcoming college costs, your appetite for life flexibility, or the property tax shock you’re walking into in some states.

This guide explains the math behind real affordability, walks through the 28/36 rule that mortgage lenders and financial planners actually use, and links you to the most accurate free home-affordability calculators, mortgage pre-approval platforms, and state-specific property tax tools — so you arrive at a personalized affordability range you can defend to yourself, your spouse, and your future self.

The gap between what banks approve and what you can actually afford

A bank pre-approves based on back-end DTI (debt-to-income ratio) — typically capped at 43–50% for conventional loans, and as high as 57% for FHA loans. That’s the maximum, not the recommendation.

Living at 50% DTI means half your gross income — let’s say two-thirds of your take-home — is going to debt service. There’s no margin for:

  • Saving for retirement at the recommended 15% of gross income
  • Building an emergency fund
  • Unexpected expenses (car repair, medical deductible, replacing the water heater)
  • Lifestyle (travel, dining out, hobbies)
  • Future cost increases (property tax reassessments, rising insurance, kids)

Banks make money when you borrow more, not when you live within your means. Their interests align with the maximum approval; yours align with a comfortable approval. The gap is what good affordability calculation captures.

What is a home affordability calculator

It’s a tool that translates your financial inputs (income, debts, savings, location) into a maximum recommended home price that fits within healthy financial guardrails.

The standard guardrails:

  • Front-end DTI ≤ 28% — housing payment (PITI + HOA) as a percentage of gross monthly income
  • Back-end DTI ≤ 36% — all debt service (mortgage + cars + student loans + credit cards) as a percentage of gross monthly income
  • Down payment ≥ 10% (20% to avoid PMI on conventional loans)
  • Cash reserves — 3–6 months of PITI in liquid savings after closing

The calculator solves for the highest home price that satisfies all four constraints simultaneously, given your inputs and the current mortgage rate.

How the 28/36 DTI rule works

The 28/36 rule is the most durable financial heuristic in personal finance. Here’s the mechanism:

Front-end ratio (28%): Total monthly housing cost (PITI + HOA + monthly mortgage insurance if any) ÷ gross monthly income.

Back-end ratio (36%): Total monthly debt obligations (housing + auto + student + credit card minimums + alimony / child support) ÷ gross monthly income.

Both must be satisfied. If you have low non-housing debt, you can stretch front-end up to 30–35% without exceeding back-end 36%. If you have heavy student loans or car payments, your front-end may need to drop to 22–25% to keep back-end under 36%.

A worked example. Combined household gross income $120,000/year ($10,000/month). $400/month student loans, $350/month car payment, $100/month credit card minimums.

  • Allowed back-end DTI: $10,000 × 36% = $3,600/month
  • Existing non-housing debt: $400 + $350 + $100 = $850/month
  • Available for housing: $3,600 − $850 = $2,750/month
  • 28% cap on housing: $10,000 × 28% = $2,800/month

The binding constraint is back-end ($2,750), not front-end ($2,800). So housing stays under $2,750/month.

Tool usage guide with example scenarios

The calculator takes about 90 seconds to populate.

1. Enter income

Combined household gross income from all sources: salary, contract, rental, investment income (the stable parts only — don’t include capital gains).

2. Enter monthly debts

Sum the monthly minimum payments on:

  • Auto loans
  • Student loans
  • Credit cards
  • Personal loans
  • Alimony / child support
  • Any other debt with a monthly obligation

Don’t include: rent (you’re replacing it), utilities, food, gas, subscriptions.

3. Enter cash for closing

Down payment + closing costs + cash reserves you want to keep. Closing costs run 2–5% of the home price. Cash reserves should be 3–6 months of PITI.

4. Pick your state

Property tax varies wildly:

  • Highest: New Jersey (2.21%), Illinois (2.05%), Connecticut (2.0%), New Hampshire (1.93%), Texas (1.74%)
  • Middle: Maryland (1.05%), Florida (0.86%), New York (1.62% but heavily county-dependent)
  • Lowest: Hawaii (0.32%), Alabama (0.40%), Colorado (0.51%), Louisiana (0.55%)

Insurance also varies by state (Florida and Louisiana extremely high due to hurricanes).

5. Enter the current mortgage rate

You can pull this from any rate-tracking site (Bankrate, NerdWallet) for your state and credit profile. The calculator defaults to the national average for your credit tier.

6. Optional: HOA dues

If you’re considering condos, townhomes, or planned communities, HOA dues count toward front-end DTI.

7. Read the result

The calculator returns:

  • Maximum recommended home price (28/36 strict)
  • Stretch maximum (35/45 — only if your career and reserves are exceptionally strong)
  • Monthly PITI breakdown at the recommended price
  • Front-end and back-end DTI gauges
  • 5-year cash flow projection

8. Stress-test the result

Click “Stress test” and the calculator re-runs with: 25% income drop (recession scenario), property tax reassessment 15% higher, insurance 20% higher, mortgage rate 1% higher. If you’re still solvent in this stress test, the original number is conservative. If you’re broke, scale down.

Real-world example: a couple in Seattle

Sarah and James are a married couple, no kids yet, both software engineers.

Inputs:

  • Combined gross income: $260,000/year ($21,667/month)
  • Monthly debts: $0 (paid off student loans, no car loans)
  • Cash for closing: $200,000 (saved aggressively for 5 years)
  • State: Washington (no income tax, ~1.0% property tax in King County)
  • Mortgage rate: 6.25% (their credit profile)
  • HOA: $0 (single-family home plan)

Conservative calculation (28/36 rule):

  • Allowed housing: $21,667 × 28% = $6,067/month
  • Allowed back-end debt: $21,667 × 36% = $7,800/month (housing only since no other debt)
  • Back-end binding: housing capped at $6,067/month

At 6.25% interest with 20% down ($800,000 mortgage on $1,000,000 home):

  • P&I: $4,924/month
  • Property tax: $833/month
  • Insurance: $250/month
  • PITI: $6,007/month ✓ within $6,067 cap

So they can afford up to $1,000,000 by the 28/36 rule.

Stretch calculation (32/40 rule):

  • Allowed housing: $21,667 × 32% = $6,933/month
  • At the same rate and 20% down, that’s about $1,150,000 in home value.

Stress test at $1,000,000:

  • 25% income drop scenario: housing now 38% of income — uncomfortable but survivable for a year while one finds new work
  • Property tax reassessment +15%: PITI rises by ~$120/month — manageable
  • Mortgage rate +1% scenario: doesn’t affect them on a fixed rate

So $1,000,000 is the recommended affordability ceiling, with $1,150,000 as a stretch only if they have strong job security and substantial liquid reserves.

The bank would have approved them up to $1,400,000+. The 28/36 number is meaningfully lower because it preserves financial flexibility.

Benefits: budget realistically, avoid being house-poor

“House-poor” — owning a house but having no money for anything else — is a measurable phenomenon. NerdWallet’s 2023 survey found 28% of homeowners reported delaying retirement contributions because of housing costs, and 22% had no emergency savings.

Honest affordability calculation prevents this by:

  • Forcing total cost transparency. PITI + HOA, not just P&I. Property tax + insurance is often $500–$1,500/month additional.
  • Comparing to lifestyle goals. If your math says you can afford $400K but you also want to retire at 55, the calculator surfaces the trade-off.
  • Stress-testing for realism. A 25% income drop happens to many households at some point in 30 years. Plan for it.
  • Highlighting opportunity cost. Money spent on housing isn’t invested in the market. The calculator shows the 30-year wealth implication.

Use cases: first-time buyer, relocation, second home, downsizing

First-time buyer

Most underestimate ownership costs (maintenance reserve, HOA, taxes) and overestimate appreciation. Use conservative settings: 28/36 strict, 6-month emergency fund maintained post-close, 1% of home value annual maintenance reserve.

Relocation

The same income supports very different home prices in different states. A $200K salary supports ~$700K in Texas, ~$500K in California (after state income tax + higher property tax in some counties).

Second home / vacation home

Triple-check the math. A second home means double everything: mortgages, insurance (vacation rentals get hit harder), maintenance. Most financial planners recommend the second home cost no more than 50% of what a primary home of equivalent price would cost.

Downsizing

Different psychology than upsizing. The calculator’s “Downsize mode” runs the math both directions — what you’ll save on PITI vs the equity you’ll free up to invest, retire on, or fund kids’ education.

Investment / rental property

Different math: focus on cap rate, cash flow after expenses, and tenant DTI not your own. The calculator’s “Investment property” mode applies appropriate underwriting.

Multigenerational household

If multiple incomes contribute, the calculator’s “Multi-borrower” mode handles co-borrowers, plus secondary income (e.g., adult child contributing to parents’ housing).

Hidden costs most calculators miss

The biggest source of “house-poor” stress is costs that show up post-close.

PMI (Private Mortgage Insurance)

Required on conventional loans with less than 20% down. Costs 0.3%–1.5% of loan amount annually. On a $400K loan at 0.7%, that’s $233/month — pure cost, no equity build. Plan to either put 20% down or to remove PMI when LTV crosses 80% (request reappraisal at that point).

HOA dues and assessments

Monthly dues for condos and HOA neighborhoods range from $200 to $2,000+. Special assessments (one-time fees for major repairs, like a $25K assessment to repaint the building) hit irregularly and aren’t in the regular monthly math.

Property tax reassessment

Some states (CA via Prop 13) cap reassessment growth; others reassess at market value annually. A 5–15% reassessment is common in fast-appreciating markets and can add $100–$300/month with no warning.

Insurance increases

Florida and Louisiana saw 50–100% homeowners insurance premium increases in 2023. California faces similar pressure. Build in 5–10% annual insurance growth assumption.

Maintenance reserve

Roof every 20–25 years ($10–25K). HVAC every 15 years ($8–15K). Water heater every 10 years ($1–2K). Appliances every 10–15 years. Average annual maintenance: 1% of home value. On a $500K home, that’s $417/month nobody calls out at closing.

Utilities

Bigger house = bigger utility bills. Upgrading from 1,200 sqft to 3,000 sqft typically doubles HVAC and lighting costs. Budget for it.

Furnishing and improvements

The first 12 months in a new home typically include $10–30K of furnishing, upgrades, and projects. Most calculators ignore this entirely.

The calculator’s “Full ownership cost” mode adds these so the affordability number includes the real total monthly impact, not just the loan payment.

Pro tips

Build the down payment in a high-yield savings account. 4–5% APY in 2026 means a $50K down payment fund earns $2,000–$2,500/year while you’re searching.

Get pre-approved with multiple lenders within 14 days. Credit bureaus bundle multiple mortgage inquiries within 14–45 days as a single inquiry. Shop 3+ lenders.

Keep your finances stable in the 60 days pre-close. Don’t change jobs, take on new debt, or make large purchases. Lenders re-pull credit before closing.

Account for the 5-year transaction-cost minimum. Buying and selling a home each cost ~6% of the price. Plan to stay 5+ years to amortize those costs.

Don’t drain your emergency fund for the down payment. Keep 3–6 months PITI in cash post-close. The first year of homeownership often surfaces surprise repairs.

Lock the rate strategically. Most lenders offer 30–60 day rate locks. Lock when you’re under contract, not before. Rate-shopping for 0.05% improvement rarely justifies the lock-expiration risk.

Get the inspection. $400–$700 inspection cost averts $5–50K in surprise post-close repairs. Always get one.

Negotiate seller concessions. In buyer’s markets (which we’re returning to in 2026), sellers often pay $5–15K in closing costs to make the deal. Don’t leave that on the table.

Best home affordability calculators and mortgage tools (2026)

A complete home-buying workflow uses an affordability calculator + a property tax estimator + a closing cost calculator + lender pre-approval. Here are the best in each category.

Free home affordability calculators

Mortgage pre-approval platforms

Closing cost and down payment calculators

Property tax and insurance estimators

Government and educational resources

Frequently asked questions

How much house can I afford on $80,000 a year?

Using the 28/36 rule with no other debt, $80,000 supports about $260,000–$310,000 of home value at 2026 mortgage rates (6.0–6.5%) with 10–20% down. Higher down payments, lower property tax states, and lower interest rates push that range higher. The calculator personalizes this based on your debts, down payment, and state.

What is a healthy debt-to-income ratio for a mortgage?

Conventional lenders cap front-end DTI at 28% (housing payment as percent of gross income) and back-end DTI at 43–50% (all debt obligations). Below 36% back-end DTI is the comfort zone where you have margin for emergencies. Above 45%, lenders may approve but you’ll be financially stretched.

Is the 28/36 rule still realistic in 2026?

It’s more important than ever. Mortgage rates in 2026 (5.5–6.5%) are roughly double the 2020–2021 lows, so the same monthly payment buys far less house. Strict adherence to 28/36 prevents over-leverage.

Does the calculator include property tax and homeowners insurance?

Yes. PITI (Principal, Interest, Tax, Insurance) is the full monthly housing cost. Property tax varies dramatically by US state and county (NJ at 2.5% vs Hawaii at 0.3%) and the calculator uses your state’s average. Homeowners insurance is estimated based on home value and state.

Should I use FHA, VA, conventional, or jumbo?

FHA: 3.5% down, more lenient credit (580+), but lifetime mortgage insurance (annoying). Best for first-time buyers with limited savings. VA: 0% down, no PMI, military service required. Best deal in the market for eligible borrowers. Conventional: 5–20% down, PMI removable at 80% LTV. Best for most buyers with savings. Jumbo: Loan above conforming limits ($766,550 in 2026 most areas). Stricter underwriting, typically 20% down.

What are typical closing costs?

2–5% of purchase price in the US. On a $400K home, expect $8K–$20K in closing costs covering: lender fees, title insurance, escrow, appraisal, attorney (some states), prepaid property tax/insurance reserves.

Should I buy now or wait for rates to drop?

Buy when affordability works. “Marrying the house, dating the rate” — refi when rates drop later. Trying to time the bottom of rate cycles has cost most buyers more than it’s saved.

What credit score do I need?

Conventional: 620 minimum, 740+ for best rates. FHA: 580 with 3.5% down, 500–579 with 10% down. VA: Typically 580–620 lender minimum. Jumbo: 700+, often 740+.

The bank’s number is the maximum, not the recommendation. Use the affordability calculator to find your actual comfortable price, stress-test it, and shop within that range. The home you can afford and the home you’d be approved for are very different questions.