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Duty Calculator

3 min readUpdated March 26, 2026
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Using the Duty Calculator

Path: Tariff Engine > Duty Calculator

  1. Enter the following:
    • HS Code -- 10-digit tariff classification number
    • Country of Origin -- 2-letter ISO country code (e.g., US, CN, DE)
    • Value for Duty (CAD) -- The customs value of the goods
    • CUSMA Claimed -- Toggle on if claiming CUSMA preferential treatment (US or Mexico origins only)
  2. Click Calculate.

Understanding the Landed Cost Breakdown

The result shows the following components:

ComponentHow It Is Calculated
MFN DutyValue for Duty x MFN rate from the Canadian Customs Tariff. Reduced to the CUSMA preferential rate if CUSMA is claimed and eligible.
SurtaxValue for Duty x applicable surtax rate. Shows 0% if no surtax order applies. Each matching order is listed separately.
GST5% of (Value for Duty + MFN Duty + Surtax)
Total Landed CostValue for Duty + MFN Duty + Surtax + GST

Provincial sales taxes (PST/HST) are not included -- they vary by province and are assessed at the point of sale, not at the border.

Example Calculation

For a $10,000 shipment of steel bolts (HS 7318.15.00.00) from the US, without CUSMA:

Value for Duty:         $10,000
MFN Duty (0%):          $0
Surtax (25% + 25%):     $5,000  (stacking: SOR/2025-66 + SOR/2025-148)
GST (5% on $15,000):    $750
Total Landed Cost:       $15,750

With a valid CUSMA claim, the surtaxes are exempted and the total landed cost drops to $10,500.

Dataset Versions

Every calculation includes the exact dataset versions used:

Version TypeFormatExample
Tariff datasetT-RT2026-R3
Surtax registryS-S2026-047
CUSMA datasetC-RC2020-R1

These stamps allow you to trace the calculation back to the specific data that was active at the time.

Landed Cost Comparison (Enterprise)

Path: Tariff Engine > Compare

Enterprise users can compare the total landed cost of a product across up to four origin scenarios side by side. The comparison table shows CUSMA availability, applied duty rate, surtax rate, duty amount, GST, and total landed cost for each origin. The lowest-cost origin is highlighted.

Tariff Lookup

Path: Tariff Engine > Tariff Lookup

If you need to verify an HS code or find the MFN rate before running a calculation, use the Tariff Lookup tool. Search by full or partial HS code, or by product description keyword.

PlanMonthly Lookups
Free10
ProfessionalUnlimited
EnterpriseUnlimited

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This article provides compliance information only. It does not constitute legal advice or customs brokerage services.

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