What is the main difference between VAT, GST, and US Sales Tax?

VAT and GST are multi-stage value-added taxes levied on consumption across supply chains, whereas US Sales Tax is a single-stage tax collected at final retail sale by individual states.

When does the Reverse Charge mechanism apply in cross-border B2B invoicing?

The Reverse Charge applies when a business sells services to a tax-registered business in another EU member state or jurisdiction. The seller charges 0% tax and notes 'VAT Subject to Reverse Charge'.

Why is seller Tax ID verification mandatory for business expense deductions?

Tax authorities require verified seller Tax IDs (EIN, VAT, GSTIN) on invoices to confirm the expense is legitimate and prevent unrecorded shadow economy transactions.

Global Invoicing & International Tax Compliance Guide

Master international invoicing standards: EU cross-border VAT, UK HMRC requirements, US 1099-NEC rules, and Indian GST calculations.

Global Invoice Tax Compliance — VAT, GST, US 1099 & Cross-Border Rules

Each country's tax authority has its own invoice field requirements. An invoice that's compliant in the US might be missing the VAT registration numbers required in Germany, or the GSTIN needed in India. This guide breaks down the mandatory fields by jurisdiction, with direct citations to the relevant regulations.

We cover EU cross-border VAT directives (Council Directive 2006/112/EC), UK HMRC tax invoice requirements (Notice 700), US 1099-NEC contractor reporting (IRS Pub 15), and India GST split calculations (CGST/SGST/IGST).

Written by the Invio Team — invoicing tools built for freelancers and small businesses worldwide

Last updated: July 2026

This guide is for informational purposes only. For tax or legal advice specific to your jurisdiction, consult a qualified accountant or tax professional.