How Much House Can You Really Afford?
One of the most critical questions every homebuyer must answer is how much house they can truly afford. The answer isn’t simply the maximum amount a lender will approve—it’s a more nuanced calculation that accounts for your lifestyle, financial goals, and the hidden costs of homeownership that many buyers overlook.
This guide provides a realistic framework for calculating your home buying budget, going beyond the basic pre-approval number to help you find a price range that keeps you financially comfortable for years to come.
The 28/36 Rule: Your Starting Framework
Financial experts and most lenders use the 28/36 rule as a baseline for affordability. This guideline states that your monthly housing costs (mortgage payment, property taxes, homeowner’s insurance, and any HOA fees) should not exceed 28% of your gross monthly income. Your total monthly debt payments—including housing costs plus car loans, student loans, credit cards, and other obligations—should stay below 36% of gross income.
For example, if your household earns $8,000 per month before taxes, your maximum housing payment should be around $2,240 (28%), and your total debt payments should stay under $2,880 (36%). These percentages represent the upper limit, not the target—staying below them provides a financial cushion for unexpected expenses.
Understanding how your debt ratios affect mortgage qualification is essential. For a complete breakdown of mortgage requirements, read our guide to understanding mortgages.
Beyond the Mortgage: Hidden Costs of Homeownership
Many first-time buyers focus exclusively on the mortgage payment and are surprised by the additional costs that come with owning a home. A realistic budget must account for all of these expenses.
Property Taxes
Property taxes vary dramatically by location, ranging from less than 0.5% to over 2.5% of the home’s assessed value annually. On a $400,000 home, that’s anywhere from $2,000 to $10,000 per year. Research the specific tax rates in the areas where you’re considering buying, as this cost alone can significantly impact your monthly budget.
Homeowner’s Insurance
Insurance costs depend on the home’s location, size, age, construction type, and local risk factors like flood zones or wildfire areas. Average annual premiums range from $1,500 to $3,500, but properties in high-risk areas can cost substantially more. Get insurance quotes before finalizing your budget.
Maintenance and Repairs
A commonly cited rule of thumb is to budget 1% to 2% of the home’s value annually for maintenance and repairs. For a $350,000 home, that means setting aside $3,500 to $7,000 per year—or roughly $290 to $580 per month. Older homes or those with aging systems (roof, HVAC, plumbing) may require even more. Understanding the home’s condition through a thorough home inspection can help you anticipate near-term repair costs.
Utilities and HOA Fees
Moving from a smaller rental to a larger home often means higher utility bills. Factor in electricity, gas, water, sewer, trash, internet, and any homeowner association fees. HOA fees can range from $100 to $500+ per month depending on the community and amenities.
Private Mortgage Insurance (PMI)
If your down payment is less than 20%, you’ll likely pay PMI, which adds 0.3% to 1.5% of the loan amount annually. On a $300,000 mortgage, that’s $75 to $375 per month. Learn how different loan types handle mortgage insurance in our FHA vs. conventional loan comparison.
Calculating Your True Monthly Budget
To determine your real affordability, work through this calculation:
Start with your gross monthly income. Include all stable, verifiable income sources for everyone who will be on the mortgage. If you’re self-employed, use your two-year average net income.
Calculate your maximum housing payment. Multiply gross monthly income by 0.28 for the conservative target, or up to 0.31 if you have minimal other debt and strong savings.
Subtract non-mortgage housing costs. From your maximum housing payment, subtract estimated property taxes (monthly), homeowner’s insurance (monthly), PMI if applicable, and HOA fees. The remaining amount is available for your actual mortgage principal and interest payment.
Determine the corresponding home price. Using current mortgage rates, calculate what home price results in a principal-and-interest payment that fits within your remaining budget. Online mortgage calculators can help, but a lender can provide the most accurate figures based on your specific profile.
Verify with the 36% total debt check. Add your housing costs to all other monthly debt payments and confirm the total stays below 36% of gross income.
Factors That Increase Your Buying Power
Several strategies can expand what you can afford without stretching your budget dangerously thin.
A larger down payment reduces your loan amount, lowers your monthly payment, and can eliminate PMI. Even increasing your down payment from 5% to 10% makes a meaningful difference in your monthly costs and the total interest you’ll pay over the life of the loan.
Improving your credit score before applying qualifies you for better interest rates, which directly increases your purchasing power. A half-percent reduction in interest rate on a $350,000 loan saves roughly $100 per month. Our guide on boosting your credit score covers practical steps to maximize your rate.
Paying off existing debt before buying reduces your DTI ratio, allowing a larger portion of your income to go toward housing. Eliminating a $400 monthly car payment, for example, could increase your approved mortgage amount by $70,000 or more.
Choosing the right loan type matters too. VA loans with no down payment and no PMI, USDA loans in eligible areas, and state-specific down payment assistance programs can all stretch your dollar further.
Common Affordability Mistakes
Avoid these pitfalls that lead buyers to overextend financially:
Buying the maximum you’re approved for. Pre-approval amounts represent what a lender will lend, not what you can comfortably afford. Lenders don’t account for your retirement savings goals, children’s education funds, travel, hobbies, or lifestyle preferences. Leave room in your budget for the life you want to live.
Ignoring future expenses. If you’re planning to have children, change careers, start a business, or make other major life changes, factor those into your affordability calculation. A payment that’s comfortable today could become a burden with changed circumstances.
Underestimating closing costs. Closing costs typically range from 2% to 5% of the loan amount and must be paid upfront. On a $350,000 mortgage, that’s $7,000 to $17,500. Make sure your savings can cover both the down payment and closing costs without depleting your emergency fund. Our guide on closing costs breaks down every fee you can expect.
Let a Professional Help You Crunch the Numbers
While online calculators provide useful estimates, a real estate professional can help you develop a truly comprehensive affordability picture based on your local market, available programs, and personal financial situation.
Connect with a knowledgeable agent through NearbyRealtors to get personalized guidance on affordability, financing options, and finding homes that fit your true budget. The right agent helps you buy smart—not just buy the most house possible.