Model an explicit half-loss rule on zero
A half-loss-on-zero rule changes the zero outcome for the eligible bet, not every bet on the table.
The distinction that matters
Assume 18 winning, 18 losing and one zero outcome. A one-unit even-money bet wins one unit, loses one unit, or loses half a unit on zero. Expected net result is (18 − 18 − 0.5) / 37 = −0.5/37, approximately −1.35135%. The derivation depends on that exact settlement rule.
A worked example
On hypothetical C$370 turnover consisting solely of eligible bets, expected cost is C$5. Applying the same percentage to single-number bets would be unjustified unless their own rules produced the same outcomes. The source must state which wagers qualify.
Your next steps
- Confirm that zero returns half the stake for this bet.
- Keep eligible and ineligible bets separate.
- Check for additional conditions or exceptions.
- Use the stated rule rather than relying on a table's marketing name.
Where this answer stops
This calculation does not assert that any Ontario operator offers the rule. A hold-over or 'en prison' rule is a different process and must not be substituted without a separate derivation.
Sources & reading
Original Northline explanation. Worked examples use stated assumptions; they do not establish an operator’s policy or predict personal results. Read how we handle evidence.
An editorial review date is not a new policy effective date. Always check the current source for operator-specific conditions.
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