Mortgage Stress Test Calculator Canada 2026
Estimate the OSFI / Finance qualifying rate, GDS/TDS, and CMHC insurance premium before you buy.
By Sammy S. · Founder · AuthorUpdated for 2026
Run the stress test
Purchase price, down payment, rate, income, and housing costs. Results update live.
Purchase & rate
Canada · 2026
25 standard · 30 Home Start (FTHB/new build)
ON 8 · SK 6 · QC 9
Stress test & CMHC result
GDS ≤ 39% · TDS ≤ 44% at qualifying rate
Likely passes stress test
GDS 33.2% · TDS 35.8%
Qualify at 6.49% · pay 4.49%
- Qualifying rate
- 6.49%
- Contract payment
- $2,731.41/mo
- Stress-test payment
- $3,305.94/mo
- Housing @ qualify (GDS)
- $3,872.61/mo
- LTV
- 95.00%
- Loan before premium
- $475,000
- CMHC premium
- $19,000.00
- Mortgage amount
- $494,000
- Min down payment
- $25,000
Est. max purchase (same down %)
$500,000
- CMHC premium 4.00% of loan before premium.
We apply the OSFI / Finance minimum qualifying rate — the greater of the contract rate + 2 percentage points or 5.25% — then test Gross Debt Service (≤39%) and Total Debt Service (≤44%) using Canadian semi-annual compounding payments at that qualifying rate. Housing costs follow CMHC: P&I (including financed premium), property tax, heat, and 50% of condo fees. For high-ratio loans we add CMHC homeowner premiums from the published LTV table (or Home Start 30-year tiers). Your actual payment still uses the contract rate.
| Tax / rule year | 2026 |
|---|---|
| MQR floor | 5.25% |
| $500k · 5% down premium | $19,000 |
| Example qualify rate | 6.50% |
Formulas
- Qualifying rate (MQR):
max(contract% + 2%, 5.25%) - Canadian monthly payment:
r = (1 + i/2)^(1/6) − 1; P × r(1+r)^n / ((1+r)^n − 1) - GDS (CMHC):
(P&I @ qualify incl. financed premium + tax/12 + heat + 50% condo) / monthly gross income - TDS (CMHC):
(GDS housing costs + other monthly debts) / monthly gross income - CMHC premium:
premium rate(LTV) × loan before premium (optionally added to mortgage)
Steps
- Check minimum down payment. 5% to $500k; 5% of first $500k + 10% of remainder for prices below $1.5M; 20% at/above $1.5M (high-ratio not available).
- Price CMHC insurance if LTV > 80%. Apply published homeowner premium tiers (or Home Start +0.20 pp for eligible 30-year).
- Compute qualifying rate. Greater of contract + 2% or 5.25%.
- Test GDS / TDS. Housing and total debt service at the qualifying payment vs 39% / 44%.
Not included
- • Lender-specific overlays stricter than 39%/44%
- • Credit score, employment, and appraisal underwriting
- • Sagen / Canada Guaranty private insurer pricing differences beyond CMHC tables
- • Closing costs, land transfer tax, and lawyer fees
- • Auto-estimating revolving credit at ≥3% of card/LOC balances (enter the payment yourself)
- • 100% site/ground rent for chattel or leasehold loans
- • Rental-income add-backs to gross income
- • Variable-rate payment triggers or HELOC blends
- • Portfolio loan-to-income (LTI) limits at the lender level
- • Straight-switch renewal MQR exemptions (OSFI Nov 2024) — this tool models new purchases
Key takeaways — stress test & CMHC
- The stress test qualifying rate is the greater of your contract rate + 2% or 5.25% (OSFI for uninsured; Finance uses the same formula for insured).
- Lenders test Gross Debt Service ≤ 39% and Total Debt Service ≤ 44% using the qualifying-rate payment — your actual payment still uses the contract rate.
- High-ratio mortgages (LTV > 80%) need default insurance. CMHC premiums run from 0.60% (≤65% LTV) to 4.00% (90.01–95%), and can be added to the loan.
- Minimum down payment (1–2 units): 5% to $500,000; then 5% of the first $500k + 10% of the rest for prices below $1,500,000; 20% at or above $1,500,000 (high-ratio insurance not available).
- 30-year high-ratio amortization generally requires CMHC Home Start (first-time buyer or newly built) with Home Start premium tiers (+0.20 percentage points vs the standard table).
What the Canadian mortgage stress test is
Federally regulated lenders must confirm you could still afford the mortgage if rates rise. They qualify you at a higher “minimum qualifying rate” (MQR), then check debt-service ratios. Passing the stress test sets how large a mortgage you can get — it does not change the rate you pay day to day.
The same qualifying formula is used for insured (high-ratio) mortgages under federal rules and for most uninsured mortgages under OSFI Guideline B-20.
Qualifying rate, GDS, and TDS
Qualifying rate = max(contract rate + 2%, 5.25%). Example: 4.49% contract → 6.49% qualify. A 3.00% contract still qualifies at 5.25%.
GDS covers mortgage P&I (at the qualifying rate), property taxes, heating, and 50% of condo fees (CMHC). TDS adds other monthly debts. CMHC guideline caps are 39% / 44%; some lenders are stricter.
CMHC insurance and down payments
If you put less than 20% down, lenders generally require mortgage default insurance (CMHC, Sagen, or Canada Guaranty). Premiums are a one-time % of the loan based on LTV and are often financed into the mortgage (CMHC: include the financed premium in the loan amount used for GDS/TDS). Provincial sales tax on premiums (Ontario, Québec, Saskatchewan) cannot be added to the loan.
High-ratio purchase prices must be below $1,500,000. Standard high-ratio amortization maxes at 25 years; Home Start can allow 30 years for eligible first-time buyers or newly built homes.
CMHC homeowner premium (total loan)
| LTV | Premium |
|---|---|
| ≤65% | 0.60% |
| 65.01–75% | 1.70% |
| 75.01–80% | 2.40% |
| 80.01–85% | 2.80% |
| 85.01–90% | 3.10% |
| 90.01–95% | 4.00% |
| 90.01–95% non-traditional DP | 4.50% |
CMHC Home Start 30-year premiums
| LTV | Premium |
|---|---|
| 80.01–85% | 3.00% |
| 85.01–90% | 3.30% |
| 90.01–95% | 4.20% |
| 90.01–95% non-traditional DP | 4.70% |
Worked examples
$500k · 5% down · 4.5% contract
Loan $475,000; CMHC $19,000 (4%); mortgage $494,000. Qualify at 6.50%. GDS 33.2% on $140,000 income.
$600k · 20% down (conventional)
No required insurance. Mortgage $480,000. Still stress-tested at 6.50% for federally regulated lenders.
Minimum down on $1.2M
5% of first $500k + 10% of $700k = $95,000 (~7.9%).
Myths vs facts
“The stress test rate is what I pay each month.”
You pay the contract rate. The higher qualifying rate is only used to size the mortgage and test GDS/TDS.
“20% down means no stress test.”
Uninsured mortgages at federally regulated lenders still use the OSFI MQR for new originations (straight-switch renewals can be exempt).
“CMHC premium disappears if I renew.”
The premium is usually paid once up front (often financed). It is not a monthly CMHC bill, but it increases the principal if financed.
“Anyone can get 30 years on a high-ratio mortgage.”
Standard high-ratio max is 25 years. 30 years generally needs Home Start eligibility (first-time buyer or newly built).
Who this helps
First-time buyers
See CMHC premium + stress-test payment before you shop.
Switching from rent
Estimate max purchase at your income under the MQR.
High-ratio borrowers
Price insurance tiers and Home Start 30-year options.
Conventional 20%+ down
Still model the OSFI stress test on federally regulated loans.
Common mistakes
- •Forgetting heating and condo fees in GDS
- •Using US-style monthly compounding instead of Canadian semi-annual
- •Ignoring that financed CMHC premium raises the stress-test payment
- •Assuming PST on the premium can be added to the mortgage
- •Planning 30-year high-ratio without Home Start eligibility
Checklist
- Get a contract-rate quote and compute your qualifying rate
- Confirm minimum down payment for the purchase price
- Estimate property tax, heat, and condo fees
- List other monthly debts for TDS
- Ask whether the insurer premium will be financed
- Compare lender overlays — some use tighter than 39%/44%
Glossary
- MQR
- Minimum qualifying rate — max(contract + 2%, 5.25%).
- GDS
- Gross debt service — (P&I + tax + heat + 50% condo fees) ÷ gross income; CMHC max 39%.
- TDS
- Total debt service — housing costs plus other debts ÷ gross income; CMHC max 44%.
- LTV
- Loan-to-value — mortgage ÷ purchase price before insurance premium.
- High-ratio
- LTV above 80% — default insurance required.
- Home Start
- CMHC product allowing up to 30-year amortization for eligible FTHB / new builds.
Frequently asked questions
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