House Affordability Calculator

How Much House Can You Realistically Afford?

House affordability combines your annual income, monthly debts, available down payment, and current mortgage rates into a maximum purchase price. Enter these values in the calculator above to see the maximum home price, maximum loan amount, and maximum monthly payment you qualify for. The result represents the lender ceiling, not necessarily the amount you should spend. A home purchase that stretches your budget to the limit leaves no room for savings, emergencies, or the unexpected maintenance costs every homeowner faces.

Income-Based Affordability Guidelines

Traditional rule: purchase price 3-4x annual household income. At $80,000: $240,000-$320,000. At $100,000: $300,000-$400,000. At $130,000: $390,000-$520,000. These multiples assume moderate debt, standard down payment, and current rate environment. In low-rate periods (3-4%), the multiple stretched to 5-6x income. At current rates (6-7%), 3-4x is more realistic because higher rates consume more income per dollar borrowed. A $300,000 loan at 3.5% costs $1,347/month. At 6.5%: $1,896/month. The $549/month rate impact reduces the affordable purchase price by roughly $80,000-$100,000 at the same income level.

How Does Existing Debt Reduce Your Buying Power?

Every dollar of existing monthly debt reduces the amount available for housing. At a 36% back-end DTI limit on $8,000/month gross income: max total debts $2,880. With $0 existing debt: full $2,880 available for housing. With $400 car payment: $2,480 for housing. With $400 car + $300 student loan: $2,180. That $700 in monthly debt reduces the affordable home price by approximately $90,000-$110,000 at current rates. This math explains why paying off a car loan before house shopping can dramatically increase your purchasing power. The $400/month freed from the car payment translates to roughly $55,000-$65,000 in additional mortgage capacity.

Down Payment Scenarios and Their Impact

With $40,000 available for down payment on a $100,000 income: 3.5% FHA on a $350,000 home: $12,250 down, $27,750 in reserves. 10% on $310,000: $31,000 down, $9,000 in reserves. 20% on $200,000: $40,000 down, $0 in reserves. The 3.5% option buys the most house but carries MIP and a larger loan. The 20% option eliminates PMI but depletes all savings - one emergency and you are in trouble. The 10% middle ground balances purchasing power with financial safety. Financial advisors recommend retaining 3-6 months of expenses after the down payment and closing costs to avoid being "house rich, cash poor."

Hidden Costs of Homeownership Beyond the Mortgage

Annual maintenance: budget 1-2% of home value per year. A $350,000 home: $3,500-$7,000 ($292-$583/month). HOA fees: $200-$800/month for condos and planned communities. Utilities (if renting previously with included utilities): $200-$400/month. Lawn care and landscaping: $100-$300/month. Home improvement projects (the first year always has surprises): $2,000-$10,000+. These costs add $500-$1,500/month above the mortgage payment. A "comfortable" mortgage payment of $2,000/month quickly becomes $2,500-$3,500 in total housing cost when all ownership expenses are included. Budget for total ownership cost, not just the mortgage payment.

Affordability by Major Metro Area

Median home price and income needed (at 28% housing ratio, 10% down, 6.5%): San Francisco ($1.35M): need $340K income. Los Angeles ($850K): $210K. New York metro ($600K): $150K. Boston ($650K): $165K. Denver ($550K): $140K. Austin ($450K): $115K. Atlanta ($380K): $100K. Dallas ($350K): $92K. Indianapolis ($270K): $72K. Cleveland ($195K): $54K. The affordability gap between expensive and affordable metros is staggering - the same $100,000 income buys a comfortable home in Indianapolis but cannot cover a median home in any major coastal city without substantial down payment or dual income.

First-Time Buyer Programs That Expand Affordability

FHA loans: 3.5% down, credit scores 580+. Conventional 97: 3% down for first-time buyers. USDA loans: 0% down in eligible rural areas. State housing finance agency programs: below-market rates and down payment assistance grants ($5,000-$20,000 in many states). DPA (down payment assistance) programs: some cover the entire down payment through forgivable loans. HomeReady and Home Possible (Fannie Mae/Freddie Mac): 3% down with income limits up to 80% of area median. These programs expand affordability by reducing the upfront cash required, effectively turning the down payment barrier from $35,000-$70,000 on a $350,000 home to $10,500-$12,250 or even $0.

When Does Renting Make More Financial Sense?

The buy vs rent calculation depends on the local price-to-rent ratio, your expected tenure, and the opportunity cost of the down payment. In markets where the price-to-rent ratio exceeds 20 (San Francisco, NYC, LA): renting and investing the down payment often produces better wealth outcomes over 5-10 years than buying. In markets below 15 (most Midwest and Southeast cities): buying wins financially within 3-5 years. If you expect to move within 3 years, transaction costs (6% selling commission, 2-5% closing costs on purchase) consume most or all of the equity gained, making renting financially superior. The emotional value of homeownership is real but should not override the math when the numbers strongly favor renting.

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