How Much House Can I Afford? The Complete Affordability Guide
By Daniel Ramirez
Key Takeaways
- Most lenders use the 28/36 rule, suggesting housing costs should not exceed 28% of gross monthly income, and total debt payments should not exceed 36%.
- Your monthly mortgage payment typically includes Principal, Interest, Taxes, and Insurance (PITI).
- Factors like your down payment, credit score, debt-to-income ratio, and current interest rates significantly impact your home affordability.
- Maximizing buying power involves improving credit, reducing debt, saving a larger down payment, and getting pre-approved for a loan.
How Much House Can I Afford?
One of the first questions every homebuyer asks is "How much can I afford?" The answer depends on several factors, from your income and debts to current interest rates and your down payment.
The 28/36 Rule
Most lenders use the 28/36 rule as a guideline:
- 28% Rule: Your monthly housing costs (mortgage, taxes, insurance) should not exceed 28% of your gross monthly income
- 36% Rule: Your total monthly debt payments should not exceed 36% of your gross monthly income
Affordability by Income
Annual Income Max Monthly Housing Estimated Home Price
$60,000 $1,400 $250,000 - $290,000
$80,000 $1,867 $330,000 - $380,000
$100,000 $2,333 $400,000 - $470,000
$120,000 $2,800 $480,000 - $560,000
$150,000 $3,500 $600,000 - $700,000
$200,000 $4,667 $800,000 - $950,000
Estimates based on 20% down payment, current average rates, and moderate property taxes.
What's Included in Your Monthly Payment
Your monthly mortgage payment consists of four main components, often called PITI:
- Principal — The amount going toward your loan balance
- Interest — The cost of borrowing
- Taxes — Property taxes (varies by location)
- Insurance — Homeowner's insurance and possibly PMI
Factors That Affect How Much You Can Afford
1. Down Payment
A larger down payment means a smaller loan and lower monthly payments. It can also help you avoid PMI.
Down Payment On $400K Home Loan Amount PMI Required?
3% $12,000 $388,000 Yes
5% $20,000 $380,000 Yes
10% $40,000 $360,000 Yes
20% $80,000 $320,000 No
2. Credit Score
Your credit score directly impacts your interest rate, which affects affordability. A higher score means a lower rate and more buying power.
3. Debt-to-Income Ratio
Lenders calculate your DTI by dividing your total monthly debt payments by your gross monthly income. Lower DTI means you can qualify for more.
4. Interest Rates
Even small rate differences significantly impact affordability:
Rate Monthly Payment ($400K) Total Interest (30yr)
6.0% $2,398 $463,353
6.5% $2,528 $510,177
7.0% $2,661 $558,036
7.5% $2,797 $606,872
How to Maximize Your Buying Power
- Improve your credit score — Even 20 points can make a difference
- Pay down existing debt — Lower DTI means higher approval amounts
- Save a larger down payment — Reduces loan amount and eliminates PMI
- Consider all loan types — FHA, VA, and conventional loans have different requirements
- Get pre-approved — Know exactly what you qualify for before shopping
Common Affordability Mistakes
- Maxing out your budget — Just because you qualify doesn't mean you should borrow the maximum
- Forgetting additional costs — HOA fees, maintenance, utilities, and repairs add up
- Ignoring future changes — Consider career changes, family growth, and lifestyle needs
- Skipping the emergency fund — Keep 3-6 months of expenses saved after your down payment
California-Specific Considerations
California's housing market has unique factors:
- Higher median home prices require larger down payments or jumbo loans
- Property taxes are relatively low thanks to Proposition 13
- Many areas qualify for high-balance conforming loans
- State programs like CalHFA offer down payment assistance
Get Your Personalized Affordability Analysis
Every buyer's situation is unique. Our team can provide a detailed analysis of your specific financial picture and help you understand exactly how much home you can comfortably afford.
Get your free pre-approval today and take the first step toward homeownership.
Frequently Asked Questions
What is the 28/36 rule for home affordability?
The 28/36 rule is a common guideline where your monthly housing expenses (PITI) should ideally not exceed 28% of your gross monthly income, and your total monthly debt payments, including housing, should not exceed 36%. It helps lenders assess your ability to manage a mortgage.
What factors influence how much home I can afford?
Several key factors influence your home affordability. These include your gross monthly income, existing debts, the size of your down payment, your credit score, and current interest rates. Lenders evaluate these to determine your loan qualification and terms.
How can I increase my home buying power?
You can increase your home buying power by improving your credit score, paying down existing debts to lower your debt-to-income ratio, and saving for a larger down payment. Exploring various loan types and getting pre-approved also helps you understand your options.
Related: See our monthly-updated Mortgage Rates 2026 forecast — what drives rates and whether they may go down this year.