How Much House Can You Really Afford? A Step-by-Step Guide
Before you start touring open houses or browsing Zillow, you need an answer to the most important question: how much house can you actually afford? Your pre-approval letter might say $500,000, but your budget might say $350,000. Here is a practical framework to find the number that works for your life.
The 28/36 Rule
Lenders use the 28/36 rule as a guideline for how much debt you can carry. The rule says: your monthly housing costs (principal, interest, taxes, insurance — PITI) should not exceed 28% of your gross monthly income, and your total debt payments (housing plus car loans, student loans, credit cards) should not exceed 36% of your gross monthly income.
For example, if your household gross income is $8,000 per month, your maximum monthly housing payment is $2,240 (28%), and your total debt payments should stay under $2,880 (36%). If you have $500 in monthly car and student loan payments, you have $2,380 left for housing — still within the 28% cap.
How Much Down Payment Do You Need?
The standard advice is 20% down to avoid private mortgage insurance (PMI), but many first-time buyers put down less. FHA loans allow as little as 3.5% down. Conventional loans can go as low as 3% for first-time buyers. However, putting down less than 20% means paying PMI — typically 0.5% to 1.5% of the loan amount per year — until you reach 20% equity.
A $350,000 home with 10% down ($35,000) leaves a $315,000 loan. At 1% PMI, that is an extra $3,150 per year ($263 per month) tacked onto your payment until you hit 20% equity.
The Hidden Costs of Homeownership
The purchase price is only the beginning. Homeowners face several ongoing costs that renters do not:
- Property taxes: Typically 0.5%–2.5% of the home's value per year depending on location
- Homeowners insurance: $800–$1,500 per year on average
- Maintenance and repairs: Budget 1%–2% of the home value annually ($3,500–$7,000 on a $350,000 home)
- HOA fees: $100–$500+ per month in planned communities
- Utilities: Often 20%–40% higher for a house compared to an apartment
Run the Numbers on Your Salary
Before deciding on a price range, start with your take-home pay. Use CalcInstant's salary calculator to see exactly what your monthly net income is after federal and state taxes, FICA, and other deductions. Then compare that to estimated mortgage payments.
Mortgage Payment Breakdown
Your monthly mortgage payment consists of four parts — often called PITI: Principal (paying down the loan balance), Interest (the cost of borrowing), Taxes (property taxes collected in escrow), and Insurance (homeowners insurance and PMI if applicable). At a 6.5% interest rate on a $350,000 loan, your principal and interest alone is about $2,212 per month. Add taxes and insurance, and you are looking at roughly $2,700–$3,000 per month.
Use the Mortgage Calculator
CalcInstant's mortgage calculator factors in all of these variables. Enter the home price, down payment, interest rate, loan term, property taxes, and insurance to see your true monthly payment at a glance.
Realistic Affordability Check
The bank might approve you for a $500,000 loan, but that does not mean you should take it. A common mistake is borrowing the maximum pre-approval amount without considering other financial goals like retirement savings, emergency funds, travel, or hobbies. A safer approach is targeting a home that costs no more than 2.5–3 times your annual household income. If you earn $120,000 a year, that puts you in the $300,000–$360,000 range regardless of what the bank pre-approves.
Once you have a realistic budget, use the Mortgage Calculator to compare different scenarios and find the monthly payment you are comfortable with before visiting any open houses.