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Mortgage Qualification, GDS/TDS & Stress Test Calculator
Found a home? Enter its price to see whether you'd likely qualify at the stress-test rate, your GDS and TDS at that price, and what it would take if you're short.
Your Qualification Inputs
The asking price of the home you want to check.
Max 25 years under 20% down; 30 for first-time buyers, new builds or 20%+ down.
Leave at 0 and we estimate it at 0.75% of the home price (typical for London-area homes). Enter your own figure if you know it.
At $650,000
Possible, but a stretch
GDS at This Price
37.5%
Upper guideline 39%
TDS at This Price
42.9%
Upper guideline 44%
Estimated Maximum Price
$667,000
Your Scenario
- Home price checked
- $650,000
- Buyer type
- Repeat buyer, resale home
- Household income (annual)
- $145,000
- Down payment available
- $85,000
- Other monthly debt payments
- $650
- Interest rate
- 4.79%
- Amortization
- 25 years
- Default insurance premium (added to mortgage)
- $17,515 (3.10%)
- Ontario PST on premium (cash at closing)
- $1,401
- Property tax (annual)
- $4,875 (estimated at 0.75% of price)
- Heating (monthly)
- $120
Can You Buy a $650,000 Home?
Estimate
Possible, but a stretch
Within the 39/44 upper guidelines
Mortgage Amount
$582,515
Estimated Payment
$3,319/mo
At 4.79%
Stress-Test Payment
$4,005/mo
At 6.79%
GDS at This Price
37.5%
Near guideline
TDS at This Price
42.9%
Near guideline
Estimates only. These figures are not an approval, a commitment to lend or a guarantee of qualification.
What It Would Take
At $650,000 you're inside the upper guidelines but above the comfortable range, so the choice of lender matters. Strong credit and stable income help files like this.
Your Estimated Price Range
| Estimate | Purchase Price | Mortgage | Est. Payment | GDS | TDS |
|---|---|---|---|---|---|
| Conservative (35/42) | $610,000 | $541,275 | $3,084/mo | 34.9% | 40.3% |
| Upper guideline (39/44) | $667,000 | $600,042 | $3,418/mo | 38.6% | 44.0% |
Illustrative scenarios based on calculator assumptions and commonly used debt-service ranges.
Understanding Your Debt-Service Ratios
GDS — 37.5%
Near guideline (guideline up to 39%)
TDS — 42.9%
Near guideline (guideline up to 44%)
Gross Debt Service (GDS) compares certain housing-related costs with gross qualifying income. Total Debt Service (TDS) considers housing costs together with other debt obligations.
What this means
Your estimated ratios sit close to commonly used qualification guidelines. Small changes to the mortgage amount, other monthly obligations or the property's carrying costs could affect the result. Actual qualification depends on the lender, mortgage type, credit profile, income verification and other factors.
Mortgage Stress Test Snapshot
Contract Interest Rate
4.79%
Qualifying Rate
6.79%
Estimated Actual Payment
$3,319/mo
Estimated Qualifying Payment
$4,005/mo
Qualifying-rate assumption used: the greater of 5.25% or your contract rate plus 2%. As of: 2026-08-01.
Why this matters
Canadian qualification rules generally require your mortgage application to be assessed at a qualifying rate that is higher than the rate you would actually pay. The qualifying payment shown above is the payment used in that assessment, not the payment you would make.
Testing your file at the higher rate is a way of checking whether the mortgage would still be manageable if rates were higher at renewal. Actual requirements vary by lender, mortgage type and whether the mortgage is insured.
What This Means for You
Lenders qualify you at 6.79%, not your contract rate. Based on the information entered, your estimated qualification falls between $541,275 and $600,042 of mortgage financing.
Your down payment is below 20% of the purchase price, so default mortgage insurance would generally apply. The premium has been added to the mortgage amount shown; Ontario's 8% sales tax on the premium ($1,401) can't be added to the mortgage and is paid in cash at closing. With less than 20% down, the maximum amortization is 25 years unless you're a first-time buyer or buying a newly built home.
Actual qualification depends on the lender, mortgage type, credit profile, income verification, property details and other factors. A licensed mortgage professional can review the complete picture with you.
Your Pathway to Homeownership Starts With Understanding Your Numbers
Your calculator results are estimates. Nandan Bajani can help you review your situation and understand your mortgage options.
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Related Resources
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