The question ‘how much house can I afford?’ seems simple, but the answer is more nuanced than any online calculator suggests. What a lender will approve you for and what you can comfortably afford are often very different numbers. This guide helps you find the realistic figure—the one that lets you own a home without becoming ‘house poor.’
What Lenders Say vs. What You Should Spend
Lenders may approve you for a mortgage that consumes up to 43-50% of your gross income in total debt payments. That’s their maximum risk threshold—not a recommendation for comfortable living. Many buyers who borrow the maximum find themselves stressed, unable to save, and one unexpected expense away from financial trouble.
A more conservative approach: aim for total housing costs (mortgage, taxes, insurance, HOA, maintenance) at or below 28% of your gross monthly income. This leaves room for other financial goals—retirement savings, emergency fund building, travel, and life’s unexpected costs.
The difference can be dramatic. On a $100,000 gross income, a lender might approve you for $2,800-$3,500/month in housing costs. A comfortable target would be closer to $2,333/month (28%). That gap represents the difference between thriving and merely surviving as a homeowner.
The 28/36 Rule Explained
The 28/36 rule is a time-tested guideline used by financial planners. The ’28’ means your total housing costs should not exceed 28% of your gross monthly income. The ’36’ means your total debt payments (housing plus car loans, student loans, credit cards, etc.) should not exceed 36% of gross income.
Example: If your household earns $8,000/month gross, your housing costs should stay below $2,240 (28%), and your total debt payments below $2,880 (36%). If you have a $400 car payment and $300 in student loans, that leaves $2,180 for housing under the 36% rule—slightly below the 28% housing cap.
This rule isn’t perfect for everyone. In high-cost-of-living areas, many responsible homeowners spend 30-35% on housing. In lower-cost areas, you might comfortably spend less than 25%. Use 28/36 as a starting point, then adjust based on your other expenses, savings goals, and risk tolerance.
Debt-to-Income Ratio: What Lenders Actually Calculate
Your debt-to-income ratio (DTI) is the primary metric lenders use to determine how much they’ll lend you. Front-end DTI measures just housing costs against income. Back-end DTI includes all monthly debt obligations.
To calculate your back-end DTI: add up all minimum monthly debt payments (credit cards, auto loans, student loans, personal loans) plus your proposed housing payment (principal, interest, taxes, insurance, PMI, HOA). Divide by your gross monthly income.
Most conventional loans require a back-end DTI below 43%. FHA loans may allow up to 50% with compensating factors (high credit score, significant savings, stable employment history). But remember: qualifying for a loan doesn’t mean you should borrow that much.
The True Monthly Cost of Homeownership
Your mortgage payment (principal + interest) is just the beginning. Here’s what actually goes into your monthly housing cost:
Property taxes vary enormously by location. In New Jersey, you might pay 2.2% of home value annually. In Hawaii, it’s closer to 0.3%. On a $400,000 home, that’s the difference between $733/month and $100/month. Research your target area’s tax rates before falling in love with a price point.
Homeowners insurance typically costs $100-$300/month depending on home value, location, coverage level, and risk factors (flood zone, wildfire area, claims history). Get quotes for your target areas before finalizing your budget.
Private mortgage insurance (PMI) applies if your down payment is less than 20%. PMI typically costs 0.5-1% of the loan amount annually. On a $360,000 loan, that’s $150-$300/month. The good news: PMI drops off once you reach 20% equity.
HOA fees range from $100-$500+/month for condos and planned communities. These cover shared maintenance, amenities, and reserves. Factor them in—they’re mandatory and tend to increase over time.
Maintenance and repairs should be budgeted at 1-2% of your home’s value annually. On a $400,000 home, that’s $333-$667/month set aside for the inevitable: HVAC replacement, roof repairs, plumbing issues, appliance failures. This isn’t optional—it’s when, not if.
Working Backward: From Budget to Purchase Price
Here’s a practical approach: start with your comfortable monthly housing budget, then work backward to determine your maximum purchase price.
If you can comfortably spend $2,200/month on total housing: subtract estimated property taxes ($400), insurance ($150), PMI if applicable ($200), and maintenance reserve ($350). That leaves approximately $1,100 for principal and interest. At a 6.5% rate on a 30-year fixed mortgage, $1,100/month in P&I supports roughly a $175,000 loan. With 10% down, your maximum purchase price would be about $194,000.
This example illustrates why affordability feels so challenging—the gap between what people want to spend and what homes cost in their desired areas can be significant. Adjusting your down payment, target area, or home type may be necessary to align budget with reality.
Hidden Costs Most Buyers Forget
Beyond the monthly costs, budget for these often-overlooked expenses: closing costs (2-5% of purchase price, due at closing), moving expenses ($2,000-$10,000 depending on distance), immediate needs (window treatments, basic tools, lawn equipment), utility setup fees and deposits, and furniture for additional rooms.
In the first year of homeownership, expect to spend $5,000-$15,000 beyond your down payment and closing costs on these items. Having this cushion prevents you from starting homeownership in financial stress.
How to Increase Your Buying Power
If the numbers don’t work for the home you want, you have several levers to pull: increase your down payment (reduces loan amount and may eliminate PMI), improve your credit score (lowers your interest rate), pay down existing debt (improves DTI and frees up monthly budget), consider a 15-year mortgage (lower rate but higher payment), or look in areas with lower property taxes and insurance costs.
You can also explore first-time buyer programs, down payment assistance, and employer housing benefits. Many buyers qualify for help they don’t know about—ask your lender about available programs.
The Emotional Factor
House hunting is emotional. It’s easy to fall in love with a property that stretches your budget and rationalize the extra cost. Before you start looking, commit to your maximum number and stick to it. Tell your agent your budget ceiling. Don’t look at homes above your range—you’ll only be disappointed by what you can actually afford.
Remember: a home you can comfortably afford brings joy. A home that strains your finances brings stress, regardless of how beautiful it is. Financial peace of mind is worth more than a bigger kitchen or extra bathroom.
For help understanding current mortgage rates and how they affect your payment, see our mortgage rate forecast. If you’re still deciding whether buying is the right move, our rent vs. buy guide provides a clear framework. And when you’re ready to start the process, our first-time homebuyer guide walks you through every step.
Disclaimer: Affordability calculations depend on individual circumstances, local costs, and current market conditions. The examples and guidelines in this article are for educational purposes. Work with a qualified lender to determine your specific borrowing capacity and comfortable budget.