How Much House Can You Afford on Your Salary?

Figuring out how much house you can afford is one of the first real steps in buying a home, and it is honestly one of the most misunderstood. A lot of people Google a rough multiplier, multiply their salary by some number, and call it a day. But the real answer is more nuanced, and getting it right protects you from becoming "house poor" or from undershooting what you could actually qualify for.

Here is how lenders think about affordability, how you should think about it, and how the two perspectives sometimes differ.

Start With Gross Income, But Don't Stop There

Lenders base their calculations on your gross monthly income, meaning what you earn before taxes and other deductions. If you earn $70,000 per year, your gross monthly income is roughly $5,833.

This is an important distinction: your take-home pay is almost always significantly lower. Federal and state taxes, Social Security, Medicare, health insurance premiums, and retirement contributions can reduce your paycheck by 25% to 40% depending on your situation. When you are budgeting for what you can realistically afford month to month, you need to think about your net income, not just what the lender calculates.

So there are two affordability numbers to keep in mind:

• Lender affordability: what a bank will approve you for
• Real-life affordability: what actually fits your monthly budget and life goals

The 28/36 Rule Explained

The most widely referenced guideline in mortgage lending is the 28/36 rule. Here is what it means:

• 28%: Your total monthly housing costs (mortgage principal and interest, property taxes, homeowners insurance, and HOA dues if applicable) should not exceed 28% of your gross monthly income.
• 36%: Your total monthly debt payments, including housing plus car loans, student loans, credit cards, and other obligations, should not exceed 36% of your gross monthly income.

Example using $70,000/year gross income:

• Gross monthly income: $5,833
• 28% housing limit: roughly $1,633/month
• 36% total debt limit: roughly $2,100/month

If you already have $500/month in car and student loan payments, your housing budget under the 36% rule would drop to around $1,600/month, which is conveniently close to the 28% cap anyway. This is how the two limits work together to set a realistic ceiling.

How Lenders Actually Calculate Debt-to-Income Ratio

In practice, most lenders use a metric called debt-to-income ratio (DTI). Your DTI compares your total monthly debt obligations to your gross monthly income, expressed as a percentage.

Conventional loans typically allow a maximum DTI of around 43% to 45%, though some programs allow higher with strong compensating factors like a large down payment or excellent credit. FHA loans can sometimes allow DTIs up to 50% or slightly above in certain cases.

Two DTI numbers come into play:

• Front-end DTI: housing costs only, divided by gross monthly income
• Back-end DTI: all monthly debt payments (including housing), divided by gross monthly income

Lenders focus most heavily on the back-end DTI. The lower your existing debts, the more room you have for a larger mortgage payment.

The Salary-to-Home-Price Multiplier (And Its Limits)

You may have heard rules like "buy a home that costs 3 to 5 times your annual salary." This is a rough starting point, not a precise formula.

At current interest rate levels (which shift frequently), those multipliers can compress or expand significantly:

• At lower interest rates, buyers can afford homes closer to 4-5x their salary.
• At higher interest rates, the same monthly payment buys a lot less house, often pushing the realistic multiple down to 3-4x or even lower.

This is why mortgage calculators that factor in the actual rate, loan term, taxes, and insurance give you a far more reliable number than any simple multiplier. Always run the real math for your situation.

What Else Affects How Much You Can Borrow

Your salary is only one piece of the puzzle. Lenders also weigh:

• Credit score: A higher score typically unlocks lower interest rates, which directly increases your buying power. Even a 0.5% rate difference can shift your budget by tens of thousands of dollars over a 30-year loan.
• Down payment size: A larger down payment reduces your loan amount and may eliminate private mortgage insurance (PMI), lowering your monthly cost.
• Loan type: Conventional, FHA, VA, and USDA loans all have different DTI limits, down payment requirements, and qualifying criteria.
• Assets and reserves: Some lenders want to see that you have savings left over after closing, not just enough for the down payment.
• Employment history: Lenders generally look for at least two years of stable income in the same field.

The "What You Can Afford" Number Lenders Miss

Here is something important that lenders do not factor in: your personal financial goals.

A lender might approve you for a $400,000 mortgage. But if you are also trying to max out a retirement account, save for your kids' education, travel, or simply keep a comfortable cash cushion, stretching to that maximum approval could make all of those goals harder to reach.

A practical approach many financial planners suggest is to look at your net (take-home) monthly income and aim for your total housing costs to stay at or below 25% to 30% of that figure. This is more conservative than what a lender will allow, but it tends to leave room for life.

Ask yourself: "If I make this mortgage payment every month for the next few years, will I still feel financially comfortable?" If the honest answer is no, consider a lower price range regardless of what you qualify for.

Down Payment Assistance Can Change Your Equation

One factor many first-time buyers overlook: you may not have to come up with the full down payment on your own. Hundreds of state and local programs offer down payment assistance in the form of grants, forgivable loans, or low-interest second mortgages. Qualifying for one of these programs can allow you to buy sooner, preserve cash reserves, or access a home price range that would otherwise be a stretch.

Ready to see the real numbers for your situation? The Homebuyer Toolkit lets you run a free affordability calculation based on your actual income, debts, and target location, and it can match you with down payment assistance programs in your state. Building your personalized home buying timeline takes just a few minutes, and it gives you a clear picture of where you stand today and what steps will get you to the closing table.

A Quick Sanity Check: Your Affordability Checklist

Before you lock in a target home price, run through these questions:

• Have you calculated your front-end and back-end DTI with your real monthly debts?
• Have you factored in property taxes and insurance for the areas you are looking in (not just the mortgage payment)?
• Have you accounted for HOA fees if relevant?
• Have you budgeted for closing costs (typically 2% to 5% of the loan amount)?
• Have you left room for an emergency fund after the down payment?
• Have you stress-tested the payment against your take-home pay, not just your gross income?

If you can check every box with confidence, you are in great shape to start shopping seriously.