How much house can I afford is the first question every serious homebuyer needs to answer, and the honest answer is almost always different from the number a mortgage calculator spits out. Lenders will tell you the maximum amount they’re willing to lend, but that number doesn’t account for your grocery bill, your weekend plans, your retirement contributions, or the reality that homeownership comes with expenses that never appear on a loan application. This guide helps you find the number that actually works for your life, not just your loan file.
The 28/36 Rule: A Starting Point, Not a Final Answer
The most widely referenced guideline in mortgage lending is the 28/36 rule. It states that your total housing costs, including mortgage principal, interest, property taxes, homeowners insurance, and any HOA fees, should not exceed 28% of your gross monthly income. Additionally, your total debt payments, including housing plus car loans, student loans, credit cards, and other obligations, should stay below 36% of gross income.
On a household income of $90,000 per year, that translates to a maximum monthly housing payment of $2,100 and a total monthly debt load of $2,700. These numbers provide a useful framework, but they don’t tell the whole story. A family with two car payments and student debt will have a very different financial reality than a household with the same income and zero non-housing debt.
Why the 28/36 Rule Often Overstates Affordability
The 28/36 rule uses gross income, meaning your pay before taxes, retirement contributions, health insurance premiums, and other deductions. Your take-home pay could be 25% to 40% less than your gross income depending on your tax bracket and benefit elections. A $2,100 housing payment feels very different when your actual monthly take-home is $5,200 versus $6,500.
A more conservative and realistic approach is to base your housing budget on net income. Many financial advisors recommend keeping total housing costs below 25% to 30% of your take-home pay. This leaves meaningful room for savings, emergencies, and the life you actually want to live outside your front door.
Breaking Down the True Monthly Cost of Owning a Home
Your mortgage payment is only one piece of the monthly puzzle. Understanding every component helps you avoid the trap of being house-poor, where you technically can make your payments but have nothing left for anything else.
Principal and Interest
This is the core of your mortgage payment. The split between principal and interest changes over the life of the loan. In the early years of a 30-year mortgage, the majority of each payment goes toward interest. A $350,000 loan at 6.5% interest results in a monthly principal and interest payment of approximately $2,212.
Property Taxes
Property taxes vary dramatically by location. The national average effective property tax rate is roughly 1.1% of a home’s assessed value, but rates range from as low as 0.27% in Hawaii to over 2.2% in New Jersey. On a $350,000 home, that’s anywhere from $79 to $642 per month. Always research the actual property tax for specific homes you’re considering, as assessments can differ from the purchase price.
Homeowners Insurance
Homeowners insurance is required by all mortgage lenders and protects your property against damage and liability. Average annual premiums vary widely by state and coverage level, typically ranging from $1,200 to $3,500 per year. Homes in areas prone to flooding, hurricanes, or wildfires can cost significantly more, and supplemental policies for flood or earthquake coverage are separate expenses.
Private Mortgage Insurance
If your down payment is less than 20% on a conventional loan, you’ll pay private mortgage insurance. PMI typically costs between 0.5% and 1.5% of the original loan amount per year, adding $146 to $438 per month on a $350,000 loan. The good news is that PMI can be removed once you reach 20% equity. FHA loans have their own mortgage insurance structure, which we detail in our complete guide to PMI.
HOA Fees
If you’re buying a condo, townhome, or a home in a planned community, monthly HOA fees can range from $100 to $800 or more depending on the amenities and services included. These fees typically cover exterior maintenance, landscaping, common area upkeep, and community amenities like pools or fitness centers. They are a fixed monthly expense that directly reduces your purchasing power.
The Costs Mortgage Calculators Don’t Show You
Online mortgage calculators are useful for ballpark estimates, but they consistently understate the true cost of homeownership by ignoring recurring expenses that every homeowner faces.
Maintenance and Repairs
A widely used benchmark is to budget 1% to 2% of your home’s value per year for maintenance and repairs. For a $350,000 home, that means setting aside $3,500 to $7,000 annually, or roughly $290 to $583 per month. Older homes and homes with deferred maintenance will tend toward the higher end of that range.
This isn’t a theoretical number. Roofs need replacing, HVAC systems fail, water heaters die, and plumbing develops issues. Having a maintenance fund prevents these inevitable expenses from becoming financial emergencies. We cover this in greater detail in our article on the true cost of homeownership beyond the mortgage.
Utilities
Moving from a smaller rental to a larger home typically increases utility costs. Electricity, gas, water, sewer, trash collection, and internet can easily total $300 to $600 per month depending on the home’s size, age, energy efficiency, and local utility rates. Ask the seller or the utility company for historical usage data on any home you’re seriously considering.
Furnishing and Setup Costs
First-time buyers often underestimate how much it costs to furnish and equip a home. You may need a lawn mower, basic tools, window treatments, additional furniture, and appliances that weren’t included in the sale. Budget at least $5,000 to $10,000 for initial setup costs, even if you plan to furnish gradually over time.
How to Calculate Your Realistic Home Budget
Here’s a practical approach to determining a purchase price that fits your real financial life.
Step 1: Start With Your Take-Home Pay
Add up the net monthly income for everyone who will be on the mortgage. This is your after-tax, after-deduction income that actually hits your bank account.
Step 2: Subtract Your Non-Housing Expenses
Account for existing debt payments, groceries, transportation, childcare, insurance, subscriptions, dining, entertainment, savings goals, and retirement contributions. Be honest. Underestimating your actual spending is the fastest path to financial stress as a homeowner.
Step 3: Determine Your Comfortable Housing Budget
The amount remaining after your non-housing expenses is the maximum you should consider for total housing costs. Most buyers find that a comfortable range is 25% to 30% of take-home pay. If that number is significantly lower than what lenders tell you you’re approved for, trust your own math.
Step 4: Work Backward to a Purchase Price
Once you know your comfortable monthly housing payment, work backward to determine the maximum purchase price. Subtract estimated property taxes, insurance, PMI if applicable, and HOA fees from your total housing budget. The remaining amount is available for principal and interest. Use a mortgage calculator with your estimated interest rate to determine what loan amount produces that payment.
For example, if your comfortable total housing budget is $2,200 per month, and property taxes, insurance, and PMI total $650, that leaves $1,550 for principal and interest. At 6.5% interest on a 30-year mortgage, that supports a loan of approximately $245,000. With a 5% down payment, your target purchase price would be around $258,000.
How Your Down Payment Affects Affordability
A larger down payment doesn’t just reduce your loan amount. It also eliminates or reduces PMI, lowers your monthly payment, and may qualify you for a better interest rate. However, depleting your savings to maximize your down payment creates its own risks.
Financial advisors generally recommend maintaining an emergency fund of three to six months of expenses after closing. If making a 20% down payment would leave you with insufficient reserves, a smaller down payment with PMI may actually be the smarter financial move. Our guide on saving for a down payment offers strategies to accelerate your savings without sacrificing financial security.
Income Scenarios and Affordability Estimates
The following estimates assume a 30-year fixed mortgage at 6.5% interest, a 5% down payment, property taxes at 1.1%, homeowners insurance at $1,800 per year, and PMI at 0.7%. Actual numbers will vary based on your specific financial situation and local costs.
A household earning $60,000 per year can generally afford a home in the $200,000 to $230,000 range. At $80,000 per year, that range expands to $260,000 to $310,000. Households earning $100,000 can typically target $330,000 to $400,000, and at $120,000, the comfortable range is approximately $400,000 to $480,000.
These are broad estimates. Your actual affordability depends on your specific debts, down payment, credit score, local tax rates, and the interest rate you qualify for. Getting pre-approved for a mortgage gives you personalized numbers based on your real financial profile.
Common Affordability Mistakes to Avoid
Buying at the top of your pre-approval amount is the most common affordability mistake first-time buyers make. Lenders approve you based on the maximum debt load you can theoretically support, not the amount that leaves you comfortable. Treat your pre-approval as a ceiling, not a target.
Another frequent mistake is ignoring future expenses. If you’re planning to start a family, change careers, go back to school, or make a major purchase within the next few years, factor those anticipated changes into your budget now. Your mortgage payment is locked in for 30 years, and your flexibility to adapt to life changes is directly tied to how much margin you leave yourself.
Finally, don’t overlook the opportunity cost of tying up too much capital in your home. Money that goes toward a larger down payment or higher monthly mortgage is money that isn’t being invested, saved for retirement, or available for emergencies. Homeownership is an important financial tool, but it works best as part of a balanced financial plan.
Next Steps
The best way to move from estimates to real numbers is to get pre-approved by a mortgage lender. Pre-approval gives you a clear picture of what you can borrow, at what rate, and with what monthly payment. Armed with that information and the budgeting framework in this guide, you’ll be able to shop for homes with confidence.
When you’re ready, connect with a vetted local real estate agent through our free matching service. A great agent will help you find homes within your true budget and negotiate the best possible deal. For a complete overview of every step that comes after setting your budget, visit our step-by-step guide to buying your first home.