How much mortgage can I afford in Canada? (GDS, TDS & stress test)
Maximum purchase price is the lowest of three constraints: down-payment rules, GDS ≤ 39%, and TDS ≤ 44%. Lenders measure those ratios at the qualifying rate of max(contract + 2%, 5.25%), not at the rate you pay. GDS includes mortgage principal and interest, property tax, heating, and 50% of condo fees. Other consumer debts sit only in TDS. Alberta has no provincial land transfer tax — registry fees still apply — but the same GDS and TDS math as every other province. High-ratio purchases add a CMHC premium to the principal. Rules verified 2026-07-13. This is an educational estimate, not a pre-approval.
Rules verified: 2026-07-13 · Methodology · OSFI MQR · CMHC premium schedule
| Income | 5% / min. down | 20% down |
|---|---|---|
| $80,000 | $326,000 | $403,000 |
| $100,000 | $427,000 | $527,000 |
| $120,000 | $528,000 | $651,000 |
| $150,000 | $687,000 | $836,000 |
$0 other debt, tax $350/mo, heat $125, 4.29% / 25 years. Same engine as the form below.