Tax Compliance

How to Invoice International Clients: Complete Guide for US, UK & EU

Landing your first international client feels amazing—until you sit down to create the invoice and realize you have no idea what information is legally required, how to handle taxes, or whether you should charge in USD, EUR, or GBP.

Here’s the reality: 34% of international payments are delayed or rejected due to incorrect invoicing—often for simple mistakes like missing VAT numbers or wrong currency formatting.

Whether you’re a US freelancer working with European clients, a UK consultant serving American companies, or an EU service provider with global reach, this guide will walk you through everything you need to know about international invoicing in 2025.