Mortgage Affordability by City Calculator
Calculate how much home you can afford in major US cities. Compares your budget against median home prices with city-specific taxes, insurance, and cost
Mortgage Affordability by City Calculator
Calculator
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Formula: Max Home Price = Max Loan Amount / (1 - Down Payment %) where Max Loan = (Max PITI - Taxes - Insurance) x Mortgage Factor
Worked example — Max affordable price ~$315,000 vs Austin median $450,000 - gap of ~$135,000
Formula
Max Home Price = Max Loan Amount / (1 - Down Payment %) where Max Loan = (Max PITI - Taxes - Insurance) x Mortgage Factor
The maximum affordable home price is determined by calculating the maximum monthly housing payment (28% of gross income), subtracting city-specific monthly property tax and insurance estimates, then converting the remaining principal and interest payment to a loan amount using the mortgage present value factor. The down payment is added to get the total purchase price.
Worked Examples
Example 1: Young Professional in Austin, TX
Problem:Income: $85,000/year, Monthly debts: $400, Down payment: 20%, Interest rate: 6.5%, 30-year term. What can they afford in Austin?
Solution:Monthly income: $85,000 / 12 = $7,083 Max housing (28%): $7,083 x 0.28 = $1,983 Max total debt (36%): $7,083 x 0.36 = $2,550 Max mortgage from DTI: $2,550 - $400 = $2,150 Binding limit: min($1,983, $2,150) = $1,983 After taxes (1.8%) and insurance (1.35%), iterative calculation Austin median: $450,000
Result:Max affordable price ~$315,000 vs Austin median $450,000 - gap of ~$135,000
Example 2: Dual Income Household in Chicago
Problem:Combined income: $140,000/year, Monthly debts: $600, Down payment: 20%, Rate: 6.5%, 30-year. What can they afford in Chicago?
Solution:Monthly income: $140,000 / 12 = $11,667 Max housing (28%): $11,667 x 0.28 = $3,267 Max total debt (36%): $11,667 x 0.36 = $4,200 Max mortgage: min($3,267, $3,600) = $3,267 Chicago has higher property tax (2.27%) reducing purchase power Chicago median: $330,000
Result:Max affordable price ~$430,000 vs Chicago median $330,000 - comfortably affordable
Frequently Asked Questions
How is mortgage affordability calculated for different cities?
Mortgage affordability varies dramatically by city due to differences in median home prices, property tax rates, homeowners insurance costs, and local cost of living. The calculation starts with your gross income and applies standard debt-to-income ratios, typically 28 percent for housing costs and 36 percent for total debt. From the maximum housing payment, monthly property taxes and insurance are deducted based on city-specific rates to determine the maximum principal and interest payment you can afford. This payment is then converted to a maximum loan amount using the mortgage payment formula, and the down payment is added to determine your maximum purchase price. Cities with high property tax rates like Houston and Dallas effectively reduce your purchasing power compared to low-tax cities like Denver or Phoenix.
What debt-to-income ratios do lenders use for mortgage approval?
Lenders typically use two debt-to-income ratio thresholds when evaluating mortgage applications. The front-end ratio, also called the housing ratio, limits your total housing costs including principal, interest, taxes, and insurance to 28 percent of your gross monthly income. The back-end ratio limits your total monthly debt obligations, including housing costs plus car payments, student loans, credit card minimums, and other debts, to 36 percent of gross monthly income. Some loan programs are more flexible, with FHA loans allowing up to 31 percent front-end and 43 percent back-end ratios. VA loans have no front-end limit and allow up to 41 percent back-end. Conventional loans with strong credit scores and compensating factors may stretch to 45 or even 50 percent back-end ratios in some cases.
How do property taxes affect mortgage affordability across cities?
Property taxes significantly impact affordability because they are part of your total monthly housing payment but do not contribute to building equity. Effective property tax rates vary enormously by location, ranging from under 0.5 percent in Hawaii and parts of Colorado to over 2.5 percent in New Jersey and Illinois. In practical terms, a $400,000 home in a city with a 0.5 percent tax rate costs $167 per month in property taxes, while the same priced home in a city with a 2.5 percent rate costs $833 per month in taxes alone. This $666 monthly difference translates to roughly $100,000 less in borrowing power. When comparing affordability across cities, it is essential to factor in property taxes rather than looking solely at home prices and mortgage rates.
What is a cost of living index and how does it relate to housing?
A cost of living index measures the relative expense of living in a particular area compared to a national baseline, which is typically set at 100. A city with an index of 150 means living there costs approximately 50 percent more than the national average. Housing is usually the largest component of the cost of living index, often accounting for 30 to 40 percent of the total index weight. Other components include food, transportation, healthcare, utilities, and goods and services. Cities like San Francisco with indices above 170 have extremely high housing costs that drive up the overall index. Conversely, cities like Houston with indices near 96 offer below-average costs. Understanding the cost of living index helps you evaluate not just whether you can afford a mortgage in a particular city but whether your overall finances will be comfortable there.
Should I buy the maximum home I can afford?
Financial experts generally advise against purchasing the maximum home your budget allows. Just because a lender approves you for a certain amount does not mean that amount is financially comfortable for your lifestyle. The 28 percent debt-to-income ratio used by lenders does not account for other important financial goals like retirement savings, emergency fund building, college savings for children, vacations, and lifestyle expenses. Many financial planners recommend keeping housing costs closer to 25 percent of gross income, or even 20 percent if you have aggressive savings goals. Buying below your maximum also provides a buffer for unexpected expenses like major repairs, property tax increases, or income disruptions. Consider future plans such as starting a family or career changes that might affect your income when making your decision.
Why does a one point rise in the interest rate cut buying power so much?
Affordability is capped by a payment, and the payment is converted to a loan through the present-value annuity factor, which falls as the rate rises. On a 30-year term that factor is about 158 at 6.5 percent and about 143 at 7.5 percent, so the same monthly principal and interest supports roughly a tenth less loan after a one point increase. Escrowed property tax and insurance do not move with the rate, so they absorb a fixed slice of the housing budget and the maximum purchase price falls by somewhat less than that tenth.
How does private mortgage insurance change what I can afford?
When the down payment is under 20 percent, a conventional lender adds private mortgage insurance, modelled here at roughly half a percent of the loan per year. PMI protects the lender, not you, and it competes for the same 28 percent housing allowance as principal, interest, taxes and insurance, so it directly shrinks the loan you qualify for. On conventional loans PMI can generally be cancelled once the balance falls to about 80 percent of the original value and terminates automatically a little below that; FHA mortgage insurance follows different rules.
Are HOA dues and condo fees counted in the debt-to-income test?
Yes. Lenders include homeowners association or condominium fees in the front-end housing ratio alongside principal, interest, taxes and insurance, and special assessments can be counted too. Mortgage Affordability by City Calculator does not model them, so in markets where much of the inventory is attached housing the affordable price will be optimistic. A useful check is to subtract the expected monthly dues from the maximum housing payment before reading the result, since every dollar of HOA fee displaces a dollar of principal and interest.
Why are insurance costs so much higher in some cities than others?
Homeowners insurance is priced on catastrophe exposure, rebuild cost and claims history, not on the sale price of the home. Coastal and hurricane-exposed markets such as Miami carry far higher rates than inland ones, and hail-prone or wildfire-prone regions have seen similar pressure, often with separate percentage deductibles for named storms. Because insurance sits inside the escrowed monthly payment, a high rate reduces qualifying loan amount exactly the way property tax does, which is why two cities with the same median price can differ sharply in real affordability.
Do lenders use gross or net income, and how is bonus or self-employment income treated?
Debt-to-income ratios are computed on gross qualifying income before tax, which is why take-home pay feels tighter than the 28 percent figure suggests. Variable compensation such as bonus, commission or overtime is usually averaged over a documented history rather than annualised from a single good year, and self-employed applicants are commonly assessed on net profit after business deductions from filed returns. Entering optimistic income here will overstate affordability, so use the figure a lender could actually document.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
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