How Much House Can I Afford? A Simple Way to Find Your Number
Before you fall in love with a listing, work out what you can actually afford. Here's how lenders think about it and how to find a number you'll be comfortable with.
It’s easy to start house hunting by browsing listings, but the smarter first step is figuring out what you can actually afford — comfortably, not just on paper. The home price a lender will approve and the price that fits your real life are often two different numbers, and the gap between them is where a lot of financial stress lives. Here’s a clear way to find a price range you can live with, and how to pressure-test it before you commit to the biggest purchase of your life.
Start with the 28/36 rule
Lenders and financial planners often use the 28/36 rule as a starting guide. It says your total monthly housing payment should stay under about 28% of your gross (pre-tax) monthly income, and all your debt payments combined — housing plus car loans, student loans, credit cards — should stay under about 36%. So if you earn $6,000 a month before tax, that’s roughly $1,680 for housing and $2,160 for all debt. These aren’t hard limits, but crossing them well is a warning sign that a home may strain your budget.
Remember housing is more than the mortgage
A common mistake is thinking only about the loan payment. Your real monthly housing cost includes principal and interest plus property tax, homeowner’s insurance, possibly PMI if you put down less than 20%, and HOA fees if applicable — not to mention maintenance, which owners often underestimate. When you test affordability, use the full payment, not just the loan. Our mortgage calculator includes tax, insurance, and PMI so you see the complete monthly figure rather than a misleadingly low one.
Work backward from a comfortable payment
Rather than asking “what’s the most I can borrow,” flip it: decide on a monthly payment you’d feel genuinely comfortable with, then work backward to the home price that produces it. Plug different prices into the mortgage calculator until the full monthly payment lands in your comfort zone. This approach keeps you in control and stops a lender’s maximum approval — which is based on ratios, not your actual lifestyle — from setting your budget for you.
Factor in your whole financial picture
The ratios don’t know about your life. Do you have childcare costs, a goal to travel, an unstable income, or big savings targets? A payment that’s “allowed” might still leave you house-poor — owning a home but with nothing left for anything else. Be honest about your spending and goals, and lean toward a payment that leaves comfortable breathing room. It’s far better to buy a slightly cheaper home and keep your financial flexibility than to stretch and feel trapped.
Test it before you commit
A great trick: for a few months before buying, set aside the difference between your current rent and the projected new housing payment. If you can live comfortably while saving that gap, the payment is realistic; if it pinches, you have your answer before signing anything. This “financial test drive” turns an abstract number into lived experience, and it doubles as a head start on your down payment.
The bottom line
How much house you can afford isn’t just what a lender approves — it’s the price that fits your full budget and goals with room to breathe. Use the 28/36 rule as a guide, count the complete housing cost, work backward from a comfortable payment, weigh your whole financial picture, and test-drive the payment first. Run your numbers through the mortgage calculator to find your range, and you’ll shop with confidence instead of anxiety.
Get pre-approved before you shop
Once you have a target price in mind, getting pre-approved by a lender turns your estimate into something concrete and makes you a serious buyer. Pre-approval involves a lender reviewing your income, debts, and credit to tell you how much they’ll actually lend and at what rate — far more reliable than guessing. It also shows sellers you’re ready to act, which matters in competitive markets. Just remember the crucial distinction we keep coming back to: the amount a lender pre-approves is the maximum they’ll allow based on ratios, not the amount you should necessarily spend. Treat pre-approval as the ceiling and your own comfortable-payment number as the real target, and shop at or below it. Comparing pre-approval offers from a few lenders is also worth it, since even a small rate difference changes both your payment and what you can afford over the life of the loan.
Frequently asked questions
How much of my income should go to a mortgage?
A common guideline is the 28/36 rule: keep your total monthly housing payment under about 28% of your gross monthly income, and all debt payments combined under about 36%. These aren't hard limits, but going well beyond them is a sign a home may strain your budget.
What costs should I include when checking affordability?
Use the full housing payment, not just the loan: principal and interest, property tax, homeowner's insurance, PMI if your down payment is under 20%, and any HOA fees. Also budget for maintenance, the down payment, and closing costs (typically 2–5% of the loan).
Should I borrow the maximum a lender approves?
Not necessarily. Lender approvals are based on ratios, not your actual lifestyle, goals, or comfort. It's often wiser to choose a payment that leaves breathing room so you're not 'house-poor.' Work backward from a payment you're comfortable with rather than borrowing the maximum.
How can I test if a mortgage payment is affordable?
Try a 'financial test drive': for a few months, set aside the difference between your current rent and the projected new payment. If you can live comfortably while saving that gap, the payment is realistic — and you've started building your down payment too.