How Much Mortgage Can I Afford in Ontario? Down Payment, Pre-Approval, and Minimum Requirements

You have been saving for years. You know roughly what you have set aside. What you probably do not know is exactly how those savings translate into buying power — because the Ontario market has several layers that other provinces do not.

The stress test compresses your maximum mortgage. The minimum down payment scales by purchase price. CMHC insurance adds to your mortgage principal if you are below 20% down. And closing costs in Ontario — particularly the Land Transfer Tax — require liquid cash that does not help with your mortgage at all.

Let's work through each of these in the right order.

What Drives Your Maximum Mortgage

Your maximum mortgage in Ontario is determined by two things: your lender's qualifying criteria and your debt service ratios.

Every federally regulated lender must qualify you at the "mortgage qualifying rate" — currently the greater of 5.25% or your actual contracted rate plus 2.0%. With 5-year fixed rates sitting around 4.09% to 4.89% in mid-2026, the qualifying rate runs approximately 6.09% to 6.89%.

At that qualifying rate, your Gross Debt Service (GDS) ratio must stay at or below 39%. GDS includes your monthly mortgage payment, property taxes, heating costs, and 50% of any monthly condo fees.

Your Total Debt Service (TDS) ratio must stay at or below 44%. TDS adds all other monthly debt obligations — car payments, student loans, credit card minimums — on top of your GDS.

Here is what this looks like in practice at different income levels, assuming no existing debt, a 25-year amortization, $500/month in property taxes, and no condo fees:

Every car payment, student loan, or line of credit you carry reduces these numbers. A $600/month car payment on a $120,000 household income can reduce your maximum mortgage by $80,000 to $100,000.

Condo fees also cut into affordability. At 50% of the monthly condo fee counted in GDS, a $700/month maintenance fee adds $350/month to your qualifying calculation — reducing your maximum mortgage roughly another $60,000 at typical income levels.

Minimum Down Payment in Ontario: The Sliding Scale

Canada's minimum down payment requirements scale with purchase price. There is no flat 5% rule for all homes.

The critical update: as of December 2024, the CMHC insured mortgage cap rose from $1 million to $1.5 million. Buyers can now purchase properties up to $1.5 million with less than 20% down, provided they qualify for CMHC insurance. Previously, anything above $1 million required a hard 20% down payment regardless of income.

Worked example — $750,000 purchase:

• First $500,000: 5% = $25,000
• Next $250,000: 10% = $25,000
• Minimum total down payment: $50,000

Worked example — $1,200,000 purchase (new rules):

• Because the property is under $1.5M, CMHC insurance is now available
• Minimum 20% down = $240,000 (the old hard requirement still applies here as CMHC doesn't cover below 20% on properties over $1M, but the cap removal allows lenders more flexibility)
• Note: confirm the exact threshold with your lender, as the insured vs. conventional rules at the $1M-$1.5M range have specific conditions

CMHC Mortgage Default Insurance

If your down payment is less than 20%, your mortgage is classified as "high-ratio" and CMHC insurance is mandatory. The premium is added to your mortgage principal, not paid upfront.

On a $700,000 purchase with 10% down ($70,000), your base mortgage is $630,000. The CMHC premium is $630,000 × 3.10% = $19,530. This is added to your mortgage, making the total amortized loan $649,530. You do not pay this upfront, but it does increase your monthly payment and long-term interest cost.

What to Expect from Mortgage Pre-Approval in Ontario

Pre-approval is not the same as mortgage approval. It is a conditional commitment from a lender stating how much they are willing to lend you, based on information you provide. It locks in your interest rate for 90 to 120 days.

What You Need to Provide

• T4 slips or Notice of Assessment for the last two years
• Recent pay stubs (usually 30 days)
• Employment letter confirming your position, salary, and tenure
• Three months of bank statements showing your down payment
• Documentation for any FHSA, RRSP, or HBP funds you plan to use
• Statements for all existing debts (car, student loan, credit cards)

Self-employed buyers face additional scrutiny. Lenders typically want two years of NOAs showing consistent income. If you write off significant business expenses, your qualifying income may be lower than your actual cash flow.

Rate Holds and Shopping Around

A pre-approval rate hold protects you if rates rise before you close. If rates fall, you can renegotiate to the lower rate. Getting pre-approval from multiple lenders is common and allowed — multiple credit inquiries within a 14-day window count as a single inquiry on your credit report under Canadian credit bureau rules.

Mortgage brokers access multiple lenders at once and can be particularly useful if your situation is complex — self-employment, unusual income sources, or credit history that needs explanation.

What Pre-Approval Does Not Guarantee

Your pre-approval is conditional on the property appraisal matching the purchase price, your financial situation not changing materially between pre-approval and closing, and the property meeting the lender's requirements. If you lose your job, take on significant new debt, or make large undocumented deposits between pre-approval and closing, the lender can withdraw their commitment.

The Down Payment Sources Your Lender Will Accept

Lenders document every dollar of your down payment to confirm it is genuinely yours (or a qualifying gift) rather than an undisclosed loan that would increase your actual debt load.

Acceptable sources:

• Personal savings (savings accounts, investments, GICs)
• FHSA withdrawals for qualifying first home purchase
• RRSP under the Home Buyers' Plan (up to $60,000 per person)
• Gifts from immediate family members with a signed gift letter confirming no repayment is expected
• Proceeds from the sale of other property or investments

What lenders scrutinize:

• Large deposits that appear suddenly in your account without explanation
• Transfers from unknown sources
• Gifts from non-immediate family members (CMHC has specific restrictions here for insured mortgages)

For FHSA and HBP funds, your lender will want to see account statements showing the available balance. FHSA withdrawals must be used for a qualifying home purchase as defined by CRA. HBP withdrawals must come from RRSP funds that have been in the account for at least 90 days.

Building Your Budget: The Three Numbers to Know

Before you start viewing properties in Ontario, know these three numbers:

1. Your maximum mortgage — from a pre-approval at a major bank, and if needed, checked again at an Ontario credit union under their criteria.
2. Your minimum down payment — calculated at your actual target price using the sliding scale above.
3. Your closing cost budget — typically 2.5% to 4% of purchase price in Ontario, higher if buying in Toronto due to the Municipal LTT. For a $700,000 Toronto purchase with first-time buyer rebates, budget $16,000 to $20,000 in closing costs on top of your down payment.

Your total liquid cash requirement is your down payment plus your closing cost budget. The Ontario First-Time Home Buyer Guide includes a full closing cost worksheet so you can calculate your complete cash requirement before you start your search.

See more Ontario guides →