About this tool
Canada has had a federal mortgage stress test since 2018 under OSFI Guideline B-20. To qualify for a mortgage from a federally regulated lender (every big bank), you must demonstrate you can afford the payment not just at the rate the lender quotes you, but at the qualifying rate - the higher of your contract rate plus 200 basis points or the Bank of Canada minimum benchmark of 5.25%. This calculator runs that test and the related GDS and TDS ratios, then layers on CMHC default-insurance for high-ratio mortgages and provincial Land Transfer Tax. All math is local to your browser.
How the math works
- Compute loan = price - down. If down payment is below 20%, the loan is high-ratio and requires CMHC, Sagen or Canada Guaranty default insurance. The premium is added to the loan (so you finance it), not paid upfront. Premium ranges from 2.8% at 80-85% LTV up to 4.0% at 95% LTV.
- Minimum down payment: 5% on the first $500K of price plus 10% on the slice from $500K to $1M. For properties above $1M with the new $1.5M insured cap, 20%+ down is mandatory if uninsured.
- Compute EMI at the qualifying rate and at the contract rate using the semi-annual compounding convention Canadian banks use for fixed-rate mortgages. Variable rates compound monthly but the stress test rate is the same.
- GDS = (mortgage EMI at qualifying rate + property tax + 50% condo fees + heat) / gross monthly income. Ceilings are 35% preferred and 39% maximum. TDS adds all other debt payments and caps at 42% preferred / 44% maximum.
- Verdict passes only if GDS and TDS both fall within max caps. If either fails, the price you can afford is solved backwards from the constraint that bites first.
- Land Transfer Tax: Ontario uses a sliding scale up to 2.5% above $2M, with a separate Toronto municipal LTT layered on top. BC Property Transfer Tax is 1% on the first $200K, 2% to $2M and 3% above. Alberta charges only a land title registration fee. Quebec charges welcome tax (taxe de bienvenue).
Rate sensitivity: same income, different rates
Holding income, debts and down payment constant, here is how the maximum property you can qualify for shifts with the contract rate:
| Contract rate | Qualifying rate | Max property price | EMI at qualifying | EMI at contract |
|---|
CMHC insurance premium tiers
| Loan-to-Value (LTV) | Down payment | CMHC premium | Example on $500K loan |
|---|---|---|---|
| 65% or less | 35%+ | 0.60% | $3,000 |
| 65.01% - 75% | 25% - 35% | 1.70% | $8,500 |
| 75.01% - 80% | 20% - 25% | 2.40% | $12,000 |
| 80.01% - 85% | 15% - 20% | 2.80% | $14,000 |
| 85.01% - 90% | 10% - 15% | 3.10% | $15,500 |
| 90.01% - 95% | 5% - 10% | 3.50% | $17,500 |
| 95.01% (rare, non-traditional) | under 5% | 4.00% | $20,000 |
Premium is added to your loan balance (not paid upfront), so you pay it over the amortization period with interest. Quebec, Ontario, BC, Manitoba and Saskatchewan also charge provincial sales tax on the premium upfront. Premiums quoted apply identically across CMHC, Sagen (formerly Genworth) and Canada Guaranty.
Worked example: $95K income, $80K down, $600K price
This is the default scenario shown above. The numbers build intuition:
- Contract rate: 5.00%. Qualifying rate = max(5.00 + 2.00, 5.25) = 7.00%.
- Loan-to-Value before insurance: ($600K - $80K) / $600K = 86.7%. Triggers CMHC insurance at the 90% LTV tier - premium 3.10% of $520K = approximately $16,120 added to the loan.
- Insured loan: $520,000 + $16,120 = $536,120 financed at 5% over 25 years.
- Contract-rate monthly EMI: approximately $3,116 (Canadian semi-annual compounded).
- Stress-test EMI at 7%: approximately $3,776 - $660 a month higher.
- Gross monthly income: $95,000 / 12 = $7,917. GDS at stress rate = (3,776 + 350 property tax + 100 heat) / 7,917 = 53%. FAILS the 39% maximum.
- Maximum price the borrower can actually qualify for at this income/down combo: approximately $445K. The $600K target is out of reach until either income rises, down payment grows, or rates fall.
Provincial Land Transfer Tax cheatsheet
| Province | LTT structure | First-time buyer rebate |
|---|---|---|
| Ontario | 0.5% to $55K, 1% to $250K, 1.5% to $400K, 2% to $2M, 2.5% above. Toronto adds matching municipal LTT. | $4,000 ON + $4,475 Toronto |
| BC | 1% to $200K, 2% to $2M, 3% to $3M, 5% above $3M (residential) | Full exemption to $500K, partial to $835K |
| Alberta | No LTT. Land title registration fee only - small ($50 + $2/$5K). | n/a |
| Quebec | "Welcome Tax" (taxe de bienvenue) - 0.5% to $58.9K, 1% to $294.6K, 1.5% above. Montreal has higher brackets. | Varies by municipality |
| Manitoba | 0% to $30K, 0.5% to $90K, 1% to $150K, 1.5% to $200K, 2% above. | None |
| Nova Scotia | Varies by municipality, typically 1-1.5%. Halifax 1.5%. | None |
What changed in 2024-2025 mortgage rules
- August 1, 2024: 30-year amortization on insured mortgages opened to first-time buyers purchasing new builds.
- December 15, 2024: Insured mortgage price cap raised from $1M to $1.5M. 30-year amortization extended to all first-time buyers and all new-build buyers.
- November 2024: OSFI removed the stress test for borrowers switching lenders at renewal (previously only same-lender renewals were exempt). Helps borrowers shop their rate at renewal without re-qualifying.
- February 2024: Foreign buyer ban extended through January 1, 2027.
- April 2024: Home Buyers Plan (HBP) withdrawal cap doubled from $35K to $60K per person.
Common stress-test mistakes
- Forgetting property tax and heat in GDS. Lenders add an annualized property tax estimate (often 1% of price) plus a heat assumption ($100/month default) to the EMI before computing GDS. Many buyers underestimate by missing these.
- Treating contract rate as the qualifying rate. Even at a 4.8% contract you must qualify at 6.8%. At a 2.5% promotional rate you still must qualify at 5.25% minimum.
- Counting variable-rate trigger rate as your stress rate. The trigger rate is when payments stop covering interest; the stress test is separate.
- Treating credit card "available limit" as zero. TDS calc adds 3% of total card limits as phantom monthly debt even if your balance is zero. Two big cards at $30K limit each adds $1,800/month to your TDS denominator.
- Assuming uninsured = no stress test. Uninsured 20%-plus-down mortgages from federally regulated lenders also stress-test.
- Counting non-permanent income. Lenders shade bonus/commission income by 50-70% over a 2-year average. Self-employed see only proven 2-year average net income.
FHSA + HBP stacking for first-time buyers
If this is your first home you have two stackable tax-advantaged vehicles:
| Account | Annual cap | Lifetime cap | Tax on contribution | Tax on withdrawal for first home |
|---|---|---|---|---|
| FHSA | $8,000 | $40,000 | Deductible (like RRSP) | Tax-free, no repayment |
| HBP (out of RRSP) | n/a (uses RRSP room) | $60,000 | RRSP contributions deductible | Tax-free; repay over 15 years |
| Combined per person | - | $100,000+ | - | Tax-free at withdrawal |
| Couple stacked | - | $200,000+ | - | Tax-free at withdrawal |
Open the FHSA first - even if you only contribute $1 it starts your 15-year clock to use the room. Maximize HBP only if you have RRSP balance to draw on. The FHSA wins on withdrawal because there is no repayment, but room is capped at $40K.
The formula explained
This calculator applies four chained formulas:
1. Qualifying rate = max(contract + 0.02, 0.0525)
2. Effective monthly rate i_eff = (1 + i_nominal/2)^(2/12) - 1
3. EMI = L * i_eff * (1 + i_eff)^n / ((1 + i_eff)^n - 1) where n = months
4. GDS = (EMI + tax + heat) / monthly_gross; TDS = GDS + other_debts / monthly_gross
These rules come from OSFI Guideline B-20 and the Bank Act. The Canadian semi-annual compounding convention (factor 2 in the exponent) is a regulatory quirk - your mortgage interest is technically compounded semi-annually but paid monthly, which is why a 5.0% contract rate is slightly cheaper than 5.0% compounded monthly would be.
To verify: with L = $500,000, i_nominal = 0.05, n = 300, the EMI should be approximately C$2,908 per month. Stress-test EMI at 7% should be approximately C$3,510.
Frequently asked questions
What is the Canadian mortgage stress test in 2026[1]?
You must qualify for the mortgage payment at the higher of your contract rate plus 2 percentage points OR the Bank of Canada minimum qualifying rate of 5.25%. The actual loan you receive uses the contract rate; the stress test is only the affordability check. The rule applies to all federally regulated lenders (every Big Six bank). Provincially regulated credit unions can offer products outside B-20 but most apply something similar.
Do uninsured mortgages also have a stress test?
Yes. Under OSFI Guideline B-20 since 2018, both insured and uninsured mortgages from federally regulated lenders must pass the higher-of contract rate + 2% or 5.25% stress test. The initial 2018 rule did not apply to renewals at the same lender, and as of November 2024 the renewal exemption was extended to switches between lenders too.
What is CMHC mortgage default insurance?
If you put less than 20% down, your mortgage is "high-ratio" and must carry default insurance from CMHC, Sagen (formerly Genworth Canada) or Canada Guaranty. The premium ranges 2.80% of the loan at 85% LTV up to 4.0% at 95% LTV. The premium is added to the loan balance, not paid upfront. The lender chooses the insurer; you cannot typically pick.
Can first-time buyers get a 30-year amortization?
Yes. Since August 1, 2024 first-time buyers purchasing newly built homes can access a 30-year amortization on insured mortgages. From December 15, 2024 the 30-year option extends to ALL first-time buyers and to all buyers of new builds, with the insured price cap raised from $1M to $1.5M. Non-first-time buyers of existing properties remain capped at 25-year amortization on insured loans.
Can I stack FHSA and HBP for a first home?
Yes - and you should. The FHSA gives a tax-deductible contribution and tax-free withdrawal up to $40,000 lifetime, plus growth. The Home Buyers Plan (HBP) lets you borrow up to $60,000 from your RRSP tax-free, repaid over 15 years starting 2 years after withdrawal. A couple can stack FHSA + HBP up to $200,000 of first-home funds combined.
What is GDS and TDS ratio in Canada?
Gross Debt Service (GDS) ratio is total housing costs (mortgage payment + property tax + heat + 50% condo fees) divided by gross income, capped at 35% (preferred) or 39% (max). Total Debt Service (TDS) ratio adds all other debt payments (credit cards, car loans, student loans) and is capped at 42% (preferred) or 44% (max). High-ratio insured borrowers must pass the lower (preferred) caps.
Is there a foreign buyer ban in Canada?
Yes. The federal Prohibition on the Purchase of Residential Property by Non-Canadians Act bans most non-citizens and non-permanent residents from buying residential property. Originally a 2-year ban from January 2023, it was extended in February 2024 through January 1, 2027. BC and Ontario impose additional non-resident speculation taxes (BC 20%, Ontario 25%).
Who provides mortgage default insurance in Canada?
Three providers: CMHC (Canada Mortgage and Housing Corporation, a Crown corporation), Sagen (formerly Genworth Canada, privately owned), and Canada Guaranty (private). Premium tables and underwriting criteria are very similar across all three so practically the choice does not affect you as a borrower.