The short answer
Interac debit is typically priced per transaction — often $0.04 to $0.12 — rather than as a percentage. Surcharging Interac is prohibited. For debit-heavy merchants, Interac volume pulls the blended effective rate down substantially, which is why a credit-only quote misrepresents Canadian costs.
Watch for percentage-priced debit
Some providers price Interac as a percentage, which is far more expensive on larger tickets. On a $200 sale, $0.07 versus 1.5% is $0.07 versus $3.00.
Interac Flash and mobile
Contactless Interac has transaction limits set by the network and issuers. For high-ticket merchants that means chip-and-PIN remains the primary debit path.
Key takeaways
- Interac should be priced per item, not as a percentage
- Surcharging Interac is prohibited
- Debit share materially changes your blended rate
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