Full compliance with Revenu Québec Tax Rounding Rules

Pelcro’s tax calculation must comply fully with Revenu Québec’s GST/QST rounding standards. Current rounding may not align precisely with their official rule requiring fractions equal to or greater than $0.005 to be rounded to the nearest cent ($0.01).

User Story
As a merchant operating in Québec,
I want Pelcro to calculate and round taxes according to Revenu Québec’s guidelines,
so that my invoices, receipts, and transactions remain compliant with provincial tax regulations.

Definition of Done (DoD)

• Tax rounding follows Revenu Québec’s rule:

  • Fractions ≥ $0.005 → round up

  • Fractions < $0.005 → round down

• Applied consistently to GST and QST.

• Implemented at the total level (sum of goods/services before rounding).

• Reflected across API, UI, invoices, and SDK tax previews.

• Validated against official examples (e.g., 4.5875025 → 4.59).

References
Revenu Québec: Calculating the taxes