How much mortgage can I afford?

Buying your first home is exciting — and a little intimidating. You might already have a sense of what homes cost in the area you’re hoping to buy in, what you’re currently spending on housing and even current mortgage rates, but translating that information into a monthly mortgage payment you can afford can feel like a leap. 

The good news: Figuring out how much mortgage you can afford simply requires a little fact finding and then letting a home affordability or mortgage calculator do the rest. You’ll need to understand how your income, debt, housing options and credit score all fit together so you can land on a payment that feels sustainable. 

How much mortgage can I afford… really? 

When people ask this question, they’re usually thinking about the monthly mortgage payment and then working backward to estimate a home price. That makes sense — and it’s a much better option than running out and getting pre-approved for a mortgage you may not actually be able to afford.  

To get a basic idea of how much of a monthly payment you can swing, you need to know your income and debt, so you can determine a debt-to-income ratio (DTI). 

Step 1: Determine DTI with a realistic look at your budget 

Your monthly mortgage payment doesn’t exist in a vacuum. It has to fit alongside your other monthly debt payments like credit cards, student loans or car loans, plus everyday expenses.  

If you haven’t taken a close look at your budget recently, this is a great moment to do it. Understanding your income, fixed bills and spending patterns makes it easier to choose a payment that won’t feel tight every month.  

Once you have tallied up your fixed debt, turn to the 28/36 rule, a good housing costs guideline. This rule suggests that: 

• Your total monthly housing costs (principal, interest, property taxes and insurance) shouldn’t exceed 28% of your gross (pre-tax) income each month. 
• Your total monthly debt payments — including your mortgage, credit cards, student loans and car payments — shouldn’t exceed 36% of your gross monthly income. This is the number lenders care about most in assessing what you can afford and your mortgage rates. 

These aren’t hard limits on what you personally can afford, but they can shape what loan amount and interest rate you may qualify for and can help you choose a payment that leaves room for the rest of your life. 

Keep in mind that your housing costs go beyond the mortgage payment: utilities, internet, HOA fees (if applicable) and ongoing maintenance and repairs. Many financial experts recommend setting aside 1% to 3% of your home’s value each year for upkeep. Planning for those costs now makes unexpected expenses easier to manage. 

Step 2: Research home prices where you want to live 

Affordability depends just as much on your local housing market as it does on your finances. Spend some time browsing listings in the neighborhoods you’re considering so you understand what different home prices actually look like in terms of space, location and features (and property tax rates).  

You can run a few of these price points through a mortgage calculator so you can connect the dots between the homes you like and the monthly payment they’d require. This helps “rightsize” expectations and prevents you from falling in love with homes that stretch your budget too far — a normal part of the process (especially for first-timers). 

But to get a real picture of what you can afford, you need to know exactly what kind of mortgage rates you will qualify for.  

Step 3: Get pre-qualified to learn your mortgage rate 

Even a small difference in interest rate can noticeably change your monthly mortgage payment, so it’s important to work with real numbers. Your credit score plays a big role here, so it’s worth knowing where you stand. While you can often find your credit score (once a year, free on AnnualCreditReport.com or many credit cards offer free credit card monitoring), actually talking to a lender will get you mortgage rates you can feel confident in. 

Ask your lender for a mortgage pre-qualification. This typically involves a soft credit check and a quick review of your income and debts. It helps estimate the loan amount and interest rate you might qualify for without committing you to anything. 

Pre-qualification also gives you the chance to compare lenders and see how rates differ, often without impacting your credit score.  

Use a home affordability calculator to explore your range 

A home affordability calculator (or even a mortgage calculator) helps connect all the dots between home prices and real monthly payments. It’s one of the easiest ways to answer the “how much mortgage can I afford” question in practical terms.  

To get the most accurate estimate, you’ll plug in: 

• Your monthly income 
• Your monthly debt payments 
• Your debt-to-income ratio  
• Estimated home price or purchase price 
• Estimated interest rate  
• Down payment amount (as a percentage of the home price) 
• Loan term (30-year fixed is most common, but there are other types of mortgages) 
• Estimated property tax rate (you can usually find annual property taxes on home listings and divide by the home’s value to estimate the rate) 
• Estimated homeowners insurance cost (we estimate 0.7%) 

Note that if your down payment is less than 20%, you’ll likely pay private mortgage insurance, which increases your monthly cost — our calculator accounts for that. You will also have to pay closing costs, though some can be rolled into the loan. 

Choose a number that fits your life, not just the math 

Now that you have a clearer picture of your finances, you can play around with the calculator, adjusting factors like home price, down payment or mortgage rate until you find a comfortable price range. The home affordability calculator will automatically flag you if these combined factors make a home price point unaffordable — meaning your monthly payment is above your affordability limit. 

The “right” mortgage amount isn’t the highest number you’re approved for. It’s the one that lets you enjoy your home while still saving, handling unexpected expenses and living the life you want outside your front door. 

FAQs about mortgage affordability 

What factors impact your mortgage rate? 

Your credit score, the loan term, current market interest rates, the size of your down payment and overall financial profile all influence the rate you’re offered. 

How can I get a better mortgage rate? 

Improving your credit score, reducing outstanding debt and saving for a larger down payment can all help you secure a better rate. 

Is the maximum amount a lender approves always affordable? 

Not necessarily. Lenders base approvals on debt and income ratios and guidelines, but your personal comfort level and monthly budget matter just as much.