Tax Intelligence
A tax engine that actually understands Canada.
Five rates. Ten provinces. Three territories. Two federal regimes (GST and HST). One provincial regime that's completely different (Quebec's QST). And U.S. vendors who sometimes charge tax incorrectly. AcumenInvoice encodes all of it.
Interactive Province Tax Calculator
See exactly what tax should appear on a Canadian invoice
Pick a province, enter the pre-tax amount, and indicate whether the vendor is U.S.-based without a Canadian GST registration. AcumenInvoice applies the same logic on every invoice it processes.
Inputs
Expected tax
What AcumenInvoice validates against
Total expected
$130.00
Rates shown reflect commonly cited general rates and are for illustration only. AcumenInvoice's production engine handles registration validation, place-of-supply rules, exempt categories, and recoverable input tax credits — not all of which can be expressed in a simple slider.
What humans miss
The tax mistakes we catch every week
We've processed enough Canadian invoices to know which errors recur. Most aren't anyone's fault — they're the consequence of overworked AP clerks reviewing 200 invoices a day under time pressure.
U.S. vendor charging Canadian tax with no GST #
Common with smaller suppliers shipping into Canada. Money leaves your account that should not.
PST applied on the GST portion (BC/SK/MB)
A surprisingly frequent calculation error. Both taxes apply to the pre-tax amount.
HST applied at the wrong provincial rate
A vendor billing 13% Ontario HST to a Nova Scotia address (15%) — or vice versa.
Freight bucketed into miscellaneous
"Misc." line that's really fuel surcharge — affects your GL coding and budget reporting.
Invalid or revoked GST registration number
Inputs to your input tax credit claim. CRA may disallow the credit.
Quebec QST compounded incorrectly
QST is administered separately, with its own filing — easy to misroute.
Want a sample audit on your last 100 invoices?
Send us a representative sample (anonymized if you prefer). We'll run it through our tax engine and report what we find — no obligation.