How Much Home Can I Afford Calculator
Calculate your maximum home price based on income, debts, down payment, and current mortgage rates.
How Much Home Can I Afford Calculator
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Formula: Max Housing = min(28% × Gross Income, 36% × Gross Income - Debts)
Worked example — Max home: ~$275,000 | Monthly payment: ~$1,867 | DTI: 28/34%
Formula
Max Housing = min(28% × Gross Income, 36% × Gross Income - Debts)
The 28/36 rule limits your monthly housing payment to 28% of gross monthly income (front-end ratio) and total debt payments to 36% (back-end ratio). The maximum home price is then derived by working backward from the allowable monthly payment, subtracting taxes, insurance, and HOA, then calculating the loan amount that fits.
Worked Examples
Example 1: First-Time Buyer on $80K Salary
Problem:Annual income: $80,000. Monthly debts: $400 (car + student loans). Down payment: $30,000. Interest rate: 6.5%, 30-year term. Property tax: 1.2%.
Solution:Monthly income: $6,667 28% max housing: $1,867 36% max total debt: $2,400 → $2,000 for housing Max housing: min($1,867, $2,000) = $1,867 Subtract tax, insurance, HOA → max P&I ≈ $1,550 Max loan ≈ $245,000 Max home price: $245,000 + $30,000 = $275,000
Result:Max home: ~$275,000 | Monthly payment: ~$1,867 | DTI: 28/34%
Example 2: Dual Income Household
Problem:Combined income: $150,000. Monthly debts: $800. Down payment: $80,000. Rate: 6.25%, 30-year. Tax: 1.5%.
Solution:Monthly income: $12,500 28% max housing: $3,500 36% max debt: $4,500 → $3,700 for housing Max housing: min($3,500, $3,700) = $3,500 Max P&I ≈ $2,900 Max loan ≈ $470,000 Max home: $470,000 + $80,000 = $550,000 DP = 14.5% → PMI applies
Result:Max home: ~$550,000 | Monthly: ~$3,500 | PMI required (14.5% down)
Frequently Asked Questions
How much house can I afford based on my salary?
A common guideline is the 28/36 rule: your monthly housing costs (mortgage, taxes, insurance) should not exceed 28% of your gross monthly income, and your total debt payments (housing plus car loans, student loans, credit cards) should not exceed 36%. For example, with a $75,000 annual salary ($6,250/month), your maximum housing payment would be $1,750/month (28%). Using today's mortgage rates and a 30-year term, this translates to roughly a $275,000-$325,000 home depending on your down payment, property taxes, and insurance costs. More aggressive lenders may approve up to 43% DTI (debt-to-income) for well-qualified borrowers, but financial advisors recommend staying at or below the 28/36 thresholds for long-term financial health.
What is the 28/36 rule for mortgages?
The 28/36 rule is a widely used lending guideline that sets two limits on housing affordability. The front-end ratio (28%) means your total monthly housing costs — including mortgage principal, interest, property taxes, homeowner's insurance, and HOA fees — should not exceed 28% of your gross monthly income. The back-end ratio (36%) means your total monthly debt obligations — housing costs plus all other recurring debts like car payments, student loans, credit card minimums, and personal loans — should not exceed 36% of gross monthly income. These are guidelines, not hard rules: FHA loans allow up to 43% back-end ratio, VA loans can go even higher, and some conventional programs accept up to 45-50% with compensating factors like excellent credit or large reserves.
How does the down payment affect how much home I can afford?
A larger down payment increases your purchasing power in two ways. First, it reduces the loan amount needed, meaning you can afford a higher-priced home with the same monthly payment. Second, putting 20% or more down eliminates the need for Private Mortgage Insurance (PMI), which typically costs 0.5-1% of the loan amount annually. For example, on a $300,000 home, a 10% down payment ($30,000) leaves a $270,000 loan with PMI of approximately $113-$225/month, while a 20% down payment ($60,000) results in a $240,000 loan with no PMI. The extra $30,000 invested upfront saves roughly $1,350-$2,700 per year in PMI alone, significantly improving your monthly cash flow and long-term cost of homeownership.
What other costs should I consider beyond the mortgage?
Homeownership involves numerous costs beyond the mortgage payment. Property taxes typically range from 0.5% to 2.5% of the home's assessed value annually, varying significantly by location. Homeowner's insurance costs $100-$300+ per month depending on location, coverage, and home value. HOA fees range from $100 to $500+ monthly in planned communities or condos. Maintenance and repairs average 1-2% of the home's value annually — a $350,000 home means budgeting $3,500-$7,000 per year. Utilities (electricity, gas, water, trash, internet) typically cost $300-$600/month. Closing costs at purchase are 2-5% of the loan amount. Some areas also have special assessment districts, flood insurance requirements, or Mello-Roos taxes that add further to monthly costs.
How does my credit score affect home affordability?
Your credit score significantly impacts both your ability to qualify for a mortgage and the interest rate you receive, which directly affects how much home you can afford. Borrowers with excellent credit (760+) typically receive the lowest available rates, while those with fair credit (620-679) may pay 1-2% higher rates. On a $300,000 30-year mortgage, a 1% rate difference (say 6% vs 7%) changes the monthly payment from $1,799 to $1,996 — a difference of $197/month or $70,920 over the life of the loan. Minimum credit scores vary by loan type: conventional loans typically require 620+, FHA loans accept 580+ with 3.5% down (or 500-579 with 10% down), and VA loans have no official minimum but lenders usually want 620+. Improving your score before applying can save tens of thousands of dollars.
Which debts count toward the back-end ratio?
Underwriters count the recurring monthly obligations that appear on your credit report or that you must legally pay: car loans and leases, student loan payments, minimum credit card payments, personal loans, and court-ordered alimony or child support. They generally do not count utilities, mobile phone plans, insurance premiums or groceries. That is why a file can pass the 36 percent test and still feel tight, and why clearing one small loan with a large monthly payment can lift your maximum price more than saving the same amount in cash.
How much does the interest rate change the price I can qualify for?
The ratio test caps your monthly payment, so the rate decides how much loan that payment buys. A payment of $1,800 in principal and interest supports roughly $284,800 over 30 years at 6.5 percent, but about $335,300 at 5 percent. A move of a percentage point and a half shifts buying power by roughly 18 percent. Because the cap is on payment rather than price, rate changes move affordability far more than most buyers expect, and they cut both ways during a search.
Why does a lender's approval amount differ from what I can comfortably afford?
Approval is a risk decision based on gross income and reported debts. It does not know your childcare bill, retirement contributions, commuting costs, or whether you want to keep saving. Buying at the top of your approval is what produces a house-poor budget. A practical discipline is to target a housing payment near the 28 percent front-end guideline rather than the maximum the file allows, and to keep three to six months of expenses in reserve after closing.
How do property taxes, insurance and HOA dues reduce the price I can afford?
The affordability ceiling applies to the whole housing payment, meaning PITI plus association dues, not principal and interest alone. If your maximum housing payment is $2,000 and taxes, insurance and dues total $600, only $1,400 is left to service the mortgage, which cuts the supportable loan by 30 percent. This is why identical incomes buy very different homes in a high-tax county versus a low-tax one, and why a condo with heavy dues prices out more buyers than its list price suggests.
How does student loan debt affect the calculation?
Student loans are included in the back-end ratio, and the question is which figure the underwriter uses. When the loan is in repayment, the documented payment normally counts, so an income-driven plan can help. When the loan is deferred, in forbearance, or on a plan showing no payment, most programs substitute an assumed payment derived from the balance rather than using zero. Ask your lender which rule your program applies before assuming deferred loans are free.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
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