How Much Mortgage Can You Afford in Ontario? A Plain-Answer Guide

Short answer: most Ontario households can borrow roughly four to four and a half times their gross annual income, provided their total housing costs stay near 39 percent of gross income and all debt payments stay near 44 percent. A household earning $150,000 with no other debt and 20 percent down typically qualifies for a purchase price in the $650,000 to $750,000 range, depending on the rate used in the stress test, property taxes, condo fees and heating costs.

That is the headline. The rest of this guide explains the mechanics behind it, because the number moves substantially once your income is self-employed, your down payment is under 20 percent, or you carry a car loan.

The two ratios every Ontario lender runs

Lenders assess affordability through two debt service ratios. GDS, gross debt service, is your mortgage payment plus property taxes plus heating plus half of any condo fees, divided by gross monthly income. TDS, total debt service, adds every other monthly obligation: car payments, credit card minimums, student loans, lines of credit, and support payments.

Insured mortgages, meaning less than 20 percent down, generally cap GDS at 39 percent and TDS at 44 percent. Uninsured files at some lenders stretch slightly further, and alternative lenders further still. If your TDS is the binding constraint rather than your income, paying off a car loan before applying can raise your maximum purchase price by more than a raise would.

How the stress test changes your number

You do not qualify at your contract rate. Under OSFI's B-20 guideline, federally regulated lenders qualify you at the greater of 5.25 percent or your contract rate plus two percentage points. On a 4.5 percent offer, you are underwritten at 6.5 percent. That single rule typically trims 15 to 20 percent off the mortgage you would otherwise be approved for.

The practical consequence: shopping for a rate 0.10 percent lower rarely changes how much you can buy. Choosing a lender whose qualifying rules, income treatment or amortization differ almost always does.

Minimum down payment in Ontario

The federal minimums apply across Ontario: 5 percent on the first $500,000, 10 percent on the portion between $500,000 and $1.5 million, and 20 percent on purchase prices above $1.5 million. Anything under 20 percent requires default insurance from CMHC, Sagen or Canada Guaranty, and in Ontario that premium carries 8 percent provincial sales tax, payable in cash at closing rather than added to the mortgage.

Closing costs Ontario buyers underestimate

Budget 1.5 to 4 percent of the purchase price. The largest line is Ontario land transfer tax, and buyers inside the City of Toronto pay a second municipal land transfer tax of roughly the same size. First-time buyers can claim a provincial rebate of up to $4,000 and, in Toronto, a municipal rebate of up to $4,475. Legal fees, title insurance, the status certificate on a condo, and the PST on mortgage insurance make up the rest.

Why self-employed and commissioned buyers see a different number

If you write off aggressively, your line 15000 income does not reflect what you actually earn. Most bank underwriters stop at the notice of assessment. A broker can add back legitimate business expenses, use a two-year average, gross up non-taxable income, or move the file to a lender that accepts bank statement income. On the same tax returns, that difference routinely changes an approval by $150,000 or more.

The same is true for rental income. Some lenders offset only 50 percent of rent against the payment; others use an 80 percent add-back to income. Investors with two or more properties should choose the lender before choosing the property.

The fastest way to raise your maximum

In rough order of impact: clear or consolidate high-payment consumer debt, extend the amortization to 30 years where the lender permits it, add a qualified co-borrower, increase the down payment past the 20 percent threshold to remove insurance premiums, and correct any credit-report errors before the application rather than after a decline.

Run your own scenario on the Blackwood affordability calculator, then bring the output to a call. I hold a licence with BRX Mortgage, work across more than 60 Ontario lenders, and on standard residential files the lender pays me, so the review costs you nothing.