For the end consumer, whether you're calculating US sales tax or European VAT, the math is identical:
US businesses selling into the EU
If you sell digital goods or services to EU consumers, you must charge VAT at the buyer's country rate once you exceed €10,000 in EU-wide sales. Register for the OSS scheme to simplify cross-border compliance. Use the VAT Reverse Calculator for rate lookups.
EU businesses selling into the US
You must collect US sales tax if you exceed economic nexus thresholds in US states. Most states use the $100,000/200-transaction threshold. See the Economic Nexus Guide for state-by-state thresholds.
Input Tax Credit (ITC) Management
The primary operational burden of VAT is the management of Input Tax Credits. Businesses must maintain meticulous records of VAT paid on business inputs (software, materials, logistics) to offset the VAT collected from customers. In a 2026 audit, failing to produce a valid VAT invoice for an expense results in the immediate loss of the credit, effectively turning the tax into a cost rather than a pass-through liability.
B2B Reverse Charge Mechanisms
In B2B cross-border transactions, the "Reverse Charge" mechanism simplifies compliance. Instead of the seller charging VAT, the buyer "self-assesses" the VAT in their own country. This eliminates the need for sellers to register in every country where they have business clients, provided they capture the buyer's valid VAT ID for the audit trail.
Canadian GST/HST
Canada uses a hybrid approach: federal GST (5%) plus provincial sales taxes that are either harmonized into HST (13–15%) or levied separately as PST. Functionally similar to VAT at the federal level with sales-tax-like complexity at the provincial level. Use the Canadian GST/HST Calculator.