How Much House Can I Afford? A Practical Guide for Buyers

"How much house can I afford?" has two answers: the amount a lender will approve, and the amount you can comfortably live with. They are often different. Lenders look at income and debts on paper. Only you know how much you want to spend on travel, childcare, savings and everything else that does not show up on a loan application.

This guide walks through how affordability is usually estimated, the costs that surprise first-time buyers, and how to build a budget you can trust.

How lenders look at affordability

Lenders mainly care about your ability to repay. They typically review your income, existing debts, credit history, savings and the size of your down payment. A key measure is your debt-to-income ratio (DTI), which compares your monthly debt payments to your gross (pre-tax) monthly income.

The 28/36 rule of thumb

You will often see a guideline called the 28/36 rule. As a rough rule of thumb:

• Front-end ratio (about 28%): housing costs, meaning mortgage principal and interest, property taxes, homeowners insurance and any HOA dues, should not exceed roughly 28% of gross monthly income.
• Back-end ratio (about 36%): all monthly debt payments, including housing, car loans, student loans and credit card minimums, should not exceed roughly 36% of gross monthly income.

This is a guideline, not a law. Lenders' actual limits vary by loan type, credit profile and other factors, and some will approve higher ratios. Being approved for a higher ratio does not mean it is wise for your life. Also, these ratios use gross income, so your take-home pay is what really decides how tight things feel.

Quick math to get a ballpark

Here is a simple way to estimate, using round illustrative numbers only:

1. Take your gross monthly income. Say it is $6,000.
2. Multiply by 0.28 to get a rough housing ceiling: $1,680 per month.
3. Subtract estimated property taxes, insurance and HOA dues. What is left is the room for principal and interest.
4. Use a mortgage calculator to see how much loan that payment supports at the interest rate you are quoted.

The mortgage calculator does step four for you. Change the rate, loan term and down payment to see how each shifts the payment. Small rate changes can move the payment noticeably over a long loan, so check what lenders are quoting when you shop, rather than relying on any rate you saw months ago.

The full cost of owning a home

The mortgage payment is only part of the picture. Budget for these too.

Property taxes and insurance

Property taxes vary widely by location, and homeowners insurance depends on the home, area and coverage. Many lenders collect both monthly into an escrow account, so they show up inside your payment. Ask for estimates for the specific homes you are considering, since they can differ a lot between neighborhoods.

PMI (private mortgage insurance)

On many conventional loans, if your down payment is under 20% of the home's price, lenders typically require PMI. It protects the lender, not you, and adds to your monthly cost. PMI typically runs from a fraction of a percent to around 1.5% of the loan per year, and it varies by lender, credit score and down payment. It can often be removed once you have built enough equity, though the rules depend on your loan. Other loan types, such as FHA loans, have their own mortgage insurance rules. Ask any lender to show you the payment with and without mortgage insurance.

Closing costs

Closing costs are the fees to finalize a purchase: lender fees, appraisal, title services, recording fees, prepaid taxes and insurance, and more. A commonly cited rule of thumb is that buyers typically pay roughly 2% to 5% of the loan amount, but it varies by location and lender. Your lender must provide an itemized estimate, so review it carefully and ask about anything unclear.

Maintenance and repairs

There is no landlord to call. A widely used rule of thumb is to set aside roughly 1% of the home's value per year for upkeep, though older homes may need more. This is a guideline, not a guarantee. A big repair like a roof or HVAC system can be much larger than a typical month's budget.

Utilities and moving costs

Larger homes usually mean higher heating, cooling and water bills. Add moving costs and furnishing needs as well.

Down payment and cash needed

A bigger down payment lowers your loan, may reduce or eliminate PMI and can reduce interest over time. But do not drain your savings to get there. You still need cash for closing costs, moving and immediate repairs, and you need an emergency fund so a job loss or surprise bill does not put your mortgage at risk. Read how much to keep in an emergency fund before deciding how much to put down.

If you are still saving, the savings goal calculator shows the monthly amount needed to reach a target down payment by a date. If you keep the money in a savings account while you wait, see high-yield savings accounts explained. Money you plan to spend within a few years generally should not be exposed to stock market swings.

What to include in your monthly housing budget

Start from your budget, not the lender's

A more reliable approach is to work backward from your real spending. Add up what you spend on necessities, debts, savings goals and things you value. Whatever remains, after building in a buffer, is what housing can realistically take. The budget calculator splits your take-home pay 50/30/20 into needs, wants and savings by default. Housing is usually the biggest need, so it is a quick check on whether the total cost of a specific home fits alongside everything else.

Questions worth asking yourself:

• Will I still be able to save for retirement and other goals after paying for this home? See how much to save for retirement.
• Could I handle the payment if my income dropped or my expenses rose?
• Are there variable elements, such as an adjustable-rate loan, that could raise my payment?
• Am I likely to stay long enough to recover the costs of buying? Buying and selling both carry significant transaction costs.

Ways to improve what you can afford

• Pay down debt. A lower DTI helps you qualify and frees monthly cash flow. See debt snowball vs avalanche.
• Strengthen your credit. Paying on time and keeping card balances low can help you get better loan terms.
• Save a larger down payment, as long as you keep an emergency reserve.
• Compare lenders. Get quotes from more than one and compare the total cost, not just the rate.
• Consider a shorter or longer term. A longer term lowers the monthly payment but usually costs more interest overall. A shorter term does the reverse.

Your home affordability checklist

1. Calculate your gross and take-home monthly income.
2. List your current debts and monthly payments.
3. Estimate a ceiling using the 28/36 rules of thumb, then treat it as an upper limit.
4. Sanity-check the total housing cost against a 50/30/20 split in the budget calculator, leaving room for savings and a buffer.
5. Run payment scenarios in the mortgage calculator with current quoted rates.
6. Add property tax, insurance, HOA, PMI, maintenance and utilities to the payment.
7. Plan cash for the down payment, closing costs, moving and repairs.
8. Keep an emergency fund intact after closing.
9. Get pre-approved by more than one lender and compare official estimates.
10. Set your own maximum price and stick to it.

This guide is educational and not financial advice. Consider speaking with a housing counselor or licensed mortgage professional about your situation.

Sources and further reading

• Consumer Financial Protection Bureau: plain-language guidance on loans, credit, debt and home buying.
• IRS: Retirement plans: current contribution limits, deduction rules and distribution rules.
• Federal Reserve: interest rates and the 2% inflation goal.

Frequently asked questions