Getting a HELOC Approved in Canada — Qualifying Income, Max LTV, and Payment Rules

OSFI B-20 sets two distinct limits. A standalone HELOC — a revolving credit line secured by a registered charge with no amortizing mortgage component — cannot exceed 65% of the property's appraised value. A readvanceable mortgage (e.g., a Manulife One, TD FlexLine, or RBC Homeline Plan) combines an amortizing mortgage with a revolving HELOC sub-limit; the combined outstanding balance of both components can reach 80% LTV, but the HELOC portion alone is still capped at 65% LTV. As the amortizing component is paid down, the HELOC sub-limit automatically increases dollar-for-dollar up to the 65% ceiling. Borrowers who want maximum revolving access over time benefit from the readvanceable structure; those who want a simple revolving facility without a linked mortgage use the standalone route.

Under B-20, federally regulated lenders must qualify HELOC applicants at the greater of the contract rate plus 200 bps or the minimum qualifying rate (MQR). As of early 2026, the MQR sits at 5.25%, but most HELOC contract rates (prime-based) produce a stress-test floor well above that — a HELOC priced at prime minus 0.50% (~4.95%) stress-tests at 6.95%. The critical underwriting nuance: the stress test is applied to the full authorized credit limit, not the amount drawn at closing. A borrower who requests a $300,000 HELOC but plans to draw $50,000 is still qualified as if $300,000 is fully drawn at 6.95%. This is the single most common reason HELOC approvals come in below the requested limit — lenders reduce the authorized amount until TDS clears.

Lenders are not uniform in how they convert a revolving HELOC limit into a monthly payment obligation for GDS/TDS. Three approaches are in use across the market:

1. Interest-only at qualifying rate. The most common: monthly payment = (authorized limit × qualifying rate) ÷ 12. This is the most borrower-friendly calculation.

2. 3% of outstanding balance. Some lenders use 3% of the authorized limit as a proxy for a fully-amortizing payment, regardless of actual draw. This is materially more conservative and can reduce qualifying mortgage room by 30-40%.

3. Amortized over 25 years at qualifying rate. A minority of lenders apply a full amortization schedule to the limit. Rare but worth confirming before submitting.

Brokers should confirm the payment-calculation method with each lender before submitting, because the same borrower profile can produce a TDS variance of 5-8 percentage points depending on which method applies.

For salaried borrowers, income verification follows standard B-20 requirements: most recent T4, two recent pay stubs, and a letter of employment confirming base salary and tenure. Variable pay (overtime, bonuses) is typically averaged over two years. OSFI's B-20 GDS ceiling is 39% and TDS ceiling is 44% for uninsured files — HELOCs are always uninsured products. The HELOC payment (calculated per the lender's method above) is added to existing mortgage principal and interest, property taxes, heat, and other debt obligations before the TDS ratio is assessed. Borrowers near the 44% TDS ceiling should model the impact of the full authorized limit before requesting a larger facility than they need in the near term.

The LTV calculation anchors to a lender-ordered appraisal, not the purchase price or MPAC assessment. In a declining-value environment, lenders may apply an internal haircut of 5-10% to the appraised value before calculating the available HELOC room. Most major banks register HELOCs under a collateral charge rather than a standard charge — this means the mortgage cannot be transferred to another lender at renewal without a full discharge and re-registration, which carries legal costs of $800-$1,500. Borrowers who anticipate switching lenders at renewal should weigh this friction cost against the HELOC's flexibility. Credit unions and some monolines register under standard charges, preserving portability.

The readvanceable structure's primary advantage is automatic re-borrowing: as the amortizing mortgage is paid down, the HELOC sub-limit increases without a new application. This makes it the preferred vehicle for the Smith Manoeuvre and other leveraged-investment strategies. The trade-off is that the entire facility is registered as a single collateral charge, typically at 100-125% of the property value, which locks the borrower to that lender until discharge. A standalone HELOC registered as a second charge behind an existing first mortgage preserves the first mortgage's portability but requires the first-mortgage lender's consent and typically carries a slightly higher rate (prime flat or prime plus 0.50% vs. prime minus 0.50% for a readvanceable sub-limit). Roughly 60-70% of HELOC volume in Canada flows through readvanceable structures at the major banks.