Key takeaways
- Budgets and invoices can differ by the tax amount.
- Registered businesses often recover GST/HST.
- Compare ROAS on a pre-tax basis.
Why ad tax matters for planning
A platform budget of $10,000 can become a bill of $11,300 after 13% HST. If you compare revenue with the tax-inclusive bill, ROAS looks worse than it is. Use a consistent basis in every report.
What to check in Canada
Keep the math clean
Record ad spend net of recoverable tax when you calculate ROAS and break-even. Track tax-inclusive cash out separately for cash flow planning.
Practical checklist
Use this list each quarter.
- Confirm your registration status
- Store invoices with the tax breakdown
- Set platform budgets before tax
- Report ROAS on a net basis
Free tool / Accounting
ROAS Calculator How much revenue does each ad dollar bring back?
Questions about Paid Media Math
Is the tax shown in the ad platform budget?
Usually no. Platform budgets exclude tax, and invoices add it.
Can I use one rate for all provinces?
No. Rates depend on your billing location.
Is this tax advice?
No. It is general information. Speak with a qualified Canadian accountant.
Key terms
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