Buying a home in 2026 means navigating mortgage rates that are still elevated compared to the bargain-basement era of 2020-2021, alongside home prices that have stayed stubbornly high in many markets. The good news is that "how much house can I afford" is a question you can answer with a handful of numbers and a few well-established rules. This guide walks you through the math the way a lender does, covers the specific differences between the United States and Canada, and shows you how to pressure-test your budget before you fall in love with a listing you can't comfortably carry.
Before you start touring open houses, run your own numbers with our mortgage calculator so you walk in with a price ceiling you actually trust.
Start With the Rules Lenders Actually Use
Affordability is not just about your salary — it's about the relationship between your income, your debts, and your housing costs. Lenders measure this with debt-to-income (DTI) ratios, and so should you.
- The 28/36 rule (USA): Spend no more than 28% of your gross monthly income on housing (the "front-end" ratio) and no more than 36% on all debt combined including the mortgage (the "back-end" ratio). Many lenders stretch the back-end to 43% for qualified borrowers.
- GDS/TDS ratios (Canada): Canadian lenders use Gross Debt Service (housing costs ÷ income, typically capped near 39%) and Total Debt Service (all debt ÷ income, typically capped near 44%).
Housing costs include principal, interest, property taxes, and insurance — often abbreviated PITI in the US. In Canada, heating costs and half of any condo fees also count toward the GDS calculation. The 28/36 rule is conservative on purpose; just because a bank will approve you at 43% does not mean a 43% housing-and-debt load leaves room for retirement saving, daycare, or a leaky roof.
2026 Mortgage Rates and Why They Matter So Much
Interest rates are the single biggest lever on affordability. In mid-2026, 30-year fixed rates in the US have hovered around 6.5%-7%, while Canadian five-year fixed rates have generally sat in the 4.5%-5.5% range as the Bank of Canada eased policy. A single percentage point of rate change can swing your maximum purchase price by tens of thousands of dollars.
Consider a borrower who can afford a $2,500 monthly payment toward principal and interest. At 5%, that supports roughly a $465,000 loan over 30 years. At 7%, the same payment supports only about $375,000 — a difference of $90,000 in buying power from rate alone. This is why locking a rate, improving your credit score, and shopping multiple lenders pay off so dramatically.
Plug different rates into the loan calculator to see exactly how your monthly payment and total interest shift across rate scenarios.
How Much Down Payment Do You Really Need?
Your down payment changes both how much you can borrow and what extra costs you'll carry.
- United States: Conventional loans can start at 3% down, FHA loans at 3.5%, and VA/USDA loans at 0% for eligible buyers. Below 20% down on a conventional loan, you pay private mortgage insurance (PMI), which typically runs 0.5%-1.5% of the loan annually.
- Canada: The minimum is 5% on the first $500,000 of the price and 10% on any portion above that, up to $1.5 million (the 2024 cap increase still applies in 2026). Below 20% down, you must buy mortgage default insurance from CMHC or a private insurer, with premiums of roughly 2.8%-4% of the loan that are added to your balance.
A larger down payment shrinks your loan, eliminates insurance premiums at 20%, and gives you a cushion against price dips. But don't drain your emergency fund or retirement accounts to hit 20% — being house-rich and cash-poor is a fast track to financial stress.
Don't Forget Closing Costs and Carrying Costs
The sticker price is only the beginning. Budget for:
- Closing costs of roughly 2%-5% of the price in the US (appraisal, title, lender fees, prepaid taxes).
- Land transfer taxes in Canada, which in cities like Toronto can stack a municipal tax on top of the provincial one — though first-time buyer rebates can offset part of this.
- Ongoing costs: property taxes, homeowner's insurance, utilities, HOA or condo fees, and a maintenance reserve of about 1% of the home's value per year.
A $500,000 home can easily carry $12,000-$18,000 a year in taxes, insurance, and upkeep before you've paid a cent of principal. Build these into your affordability number, not as an afterthought.
The Canada Mortgage Stress Test
Canadian buyers face an extra hurdle: the mortgage stress test. Federally regulated lenders must qualify you at the greater of your contract rate plus 2% or a 5.25% floor. So even if your actual rate is 4.8%, you must prove you could afford payments at 6.8%. This deliberately lowers your maximum mortgage and protects you against future rate hikes. US borrowers don't face a formal stress test, but applying the same logic — asking "could I still pay if my rate were 2 points higher?" — is smart risk management on both sides of the border.
Buy or Keep Renting? Run the Comparison
Affordability isn't only about whether you can qualify — it's about whether buying beats renting for your situation. The math hinges on how long you'll stay, your local price-to-rent ratio, and opportunity cost on your down payment. As a rule of thumb, if you'll move within three years, renting often wins; past five years, buying usually pulls ahead as equity builds and rent inflates. Compare the full picture with our rent vs buy calculator before committing.
A Quick Worked Example
Say a Toronto-area couple earns $140,000 combined, has a $35,000 down payment, no car loans, and a $400 monthly credit card minimum. Using a 39% GDS limit and qualifying at the stress-tested rate, they can likely carry a home in the low-$400,000s. Move that same income to a lower-cost US metro at 6.75% with 10% down, and the affordable range climbs because property taxes, insurance, and prices differ market to market. The lesson: your number is local, and it changes with rates, debts, and down payment — so recalculate whenever any of those move.
Related Calculators
- Mortgage Calculator — estimate your monthly payment and maximum price.
- Rent vs Buy Calculator — see whether buying actually beats renting.
- Loan Calculator — test how different rates and terms change your costs.
Frequently Asked Questions
What income do I need to afford a $400,000 house in 2026?
With 2026 rates near 6.5%-7%, a $400,000 home with 10% down and typical taxes and insurance usually requires roughly $105,000-$120,000 in annual household income to stay within a 36% debt-to-income ratio. Lower rates, a bigger down payment, or no other debt can reduce the income needed.
How much down payment do I need in the USA and Canada?
In the USA you can buy with as little as 3% (conventional) or 3.5% (FHA), though 20% avoids private mortgage insurance. In Canada the minimum is 5% on the first $500,000 and 10% on the portion above, and mortgage default insurance is required below 20% down.
What is the mortgage stress test in Canada?
Canadian lenders must qualify you at the greater of your contract rate plus 2% or 5.25%. This stress test confirms you could still make payments if rates rise, which lowers the maximum mortgage you can be approved for compared with your actual rate.
Should I buy or keep renting in 2026?
It depends on how long you will stay, local price-to-rent ratios, and your down payment. If you plan to stay five or more years and can cover the down payment and closing costs without draining your emergency fund, buying often wins. Use a rent vs buy calculator to compare the true long-run cost.