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Home Affordability Calculator

Find the maximum home price you can afford based on income, debts, down payment, and target debt-to-income ratio.

By UtilityKit Team · Reviewed for accuracy by UtilityKit Editors · Updated May 2026

About Home Affordability Calculator

The Home Affordability Calculator back-solves the largest home price you can afford by working backward from your gross income, monthly debt payments, available down payment cash, and your target debt-to-income (DTI) ratio. Unlike calculators that ask for a target home price upfront, this tool tells you what price actually fits your finances. It iteratively solves for the price where total monthly housing — principal, interest, property tax, homeowner's insurance, PMI (if down payment is below 20%), and HOA — exactly equals what your DTI cap allows after subtracting existing debts. The result includes a full monthly breakdown so you can see exactly how the housing payment splits between mortgage, escrow, and insurance, plus a flag if PMI applies and the down payment threshold needed to remove it.

Why use Home Affordability Calculator

Back-solves the maximum price your finances support — no guessing at a target price.
Includes all components of a real housing payment: P&I, taxes, insurance, PMI, and HOA.
Flags PMI explicitly with the down payment needed to eliminate it.
Uses your actual existing debt payments instead of generic income multipliers.
Lets you adjust DTI to see conservative (28%), standard (36%), or aggressive (43%+) scenarios.
Browser-only privacy — your income, debts, and savings never leave your device.

How to use Home Affordability Calculator

Enter your gross annual income (before taxes — this is what mortgage lenders use).
Enter total monthly debt payments: car loans, student loans, minimum credit card payments, alimony.
Enter your down payment cash available (savings minus reserves you want to keep).
Set your target DTI percentage — 36% is a common target; conventional lenders typically allow up to 43–50%.
Set the loan term, current APR for your credit profile, and local property tax and insurance rates.
Review the maximum home price and the full monthly breakdown — adjust DTI if the result is higher or lower than expected.

When to use Home Affordability Calculator

Pre-shopping: figure out your price range before browsing listings or talking to agents.
Mortgage pre-approval prep: validate the lender's number against your own affordability target.
Comparing 'aggressive' (43% DTI) vs. 'conservative' (28% DTI) buying scenarios.
Evaluating whether saving more for a larger down payment to skip PMI is worth the wait.
Refining your house-hunt budget after seeing real-world property tax rates in target neighborhoods.
Stress-testing affordability against a higher rate scenario before locking a mortgage.

Examples

Standard middle-income buyer

Input: $95K income, $450/mo debts, $40K down, 36% DTI, 30 yr / 6.75% APR, 1.2% tax, 0.4% ins

Output: Max price ~$365K, ~$2,400/mo housing, includes ~$245 PMI

Higher down payment, no PMI

Input: Same as above but $80K down

Output: Max price ~$340K (lower because tax/ins scale with price), ~$2,400/mo, no PMI

Conservative 28% front-end

Input: $120K income, $0 debts, $60K down, 28% DTI, 30 yr / 6.5% APR, 1.0% tax, 0.4% ins

Output: Max price ~$430K, ~$2,800/mo housing, no PMI (20% down)

Tips

Use 28% front-end DTI (housing only) and 36% back-end DTI (housing + debt) as your target. These are the conservative limits banks have used for decades.
Property tax rates vary 5x or more between counties. Check the actual rate in the neighborhood you're buying in — not the state average.
Insurance costs jump in coastal, wildfire, and flood zones. Get a real quote rather than using a generic 0.4% rate.
PMI is roughly 0.3–1.5% of the loan amount per year. A 20% down payment removes it; alternatively, you can request removal once your equity reaches 20%.
Don't max out at 43% DTI just because you can. Aim for 30–35% to leave breathing room for emergencies, repairs, and life events.

Frequently Asked Questions

How accurate is this calculator?▾

The math matches the formulas mortgage lenders use for DTI underwriting. The accuracy of the result depends on your inputs — especially the property tax and insurance rates. Use real numbers from the neighborhood you're buying in. Lenders may approve more or less based on credit score, reserves, and program (conventional, FHA, VA, jumbo).

Is my data shared anywhere?▾

No. Income, debts, savings, and credit profile stay in your browser. The calculator runs entirely on your device. There are no tracking pixels on inputs, no third-party analytics on your numbers, and no data sent to any server.

How does this compare to bank affordability calculators?▾

Bank calculators tend to be either conservative (28% DTI, no debt math) or aggressive (43–50% DTI to maximize the loan). This tool exposes DTI as a slider so you control the conservatism. It also shows the full monthly breakdown rather than just the price ceiling, so you can see what your actual housing budget looks like.

What DTI ratio should I target?▾

Standard guidance: 28% front-end (housing only), 36% back-end (housing + all debt). Aggressive limits are 31% / 43% for conventional and up to 31% / 50% for FHA. Targeting the cap leaves no room for emergencies — most financial advisors suggest staying 5–10 percentage points below the cap.

Why does the price drop when I increase the down payment beyond 20%?▾

Property tax and insurance scale with home price, not loan amount. A bigger down payment doesn't increase your monthly housing budget — it just reallocates from loan to equity. The price ceiling is still set by your DTI cap minus tax + insurance + HOA.

What APR should I expect for my credit score?▾

As of 2026, typical 30-year fixed mortgage APRs by FICO score: 760+ ~6.5%, 700–759 ~6.75%, 660–699 ~7%, 620–659 ~7.5%+, 580–619 (FHA only) ~8%+. Rates also vary by lender, points paid, loan type, and market conditions. Get quotes from 3–5 lenders before locking.

Does this account for closing costs and reserves?▾

No — your down payment cash should be net of closing costs (typically 2–5% of home price) and any reserves you want to keep liquid (most planners suggest 3–6 months of expenses). Subtract those from your total savings before entering the down payment field.

Should I include my spouse's income and debts?▾

Yes if you're applying jointly. Include both incomes and both sets of debt payments. Lenders use combined DTI when both borrowers are on the loan. If only one spouse is on the loan, only count that person's income and debts.

Explore the category

Glossary

DTI (Debt-to-Income ratio): Monthly debt payments (including the new mortgage payment) divided by gross monthly income. Lenders use it to gauge how stretched your finances are.
Front-end DTI: Just the housing payment (PITI + HOA) as a percentage of gross monthly income. Lenders typically cap this at 28–31%.
Back-end DTI: All monthly debt obligations (housing + cars + student loans + credit cards) divided by gross monthly income. Conventional lenders cap this at 43%; FHA goes higher.
PITI: Principal, Interest, Taxes, and Insurance — the four components of a typical mortgage payment. Add HOA on top for condo/townhouse purchases.
PMI (Private Mortgage Insurance): Insurance the lender requires when your down payment is below 20%. Adds 0.3–1.5% of the loan amount per year. Drops automatically when LTV reaches 78%.
LTV (Loan-to-Value): Loan balance divided by home value. PMI applies above 80% LTV. Most refis require LTV below 80% as well.