Invoicing Foreign Clients: A General Playbook

Invoicing across borders adds layers: currency, VAT treatment, payment method and language. A checklist keeps it manageable.

Before you invoice

Confirm the currency, the VAT treatment (usually reverse charge for B2B services), the payment method, and the client’s correct legal details and VAT number.

Agree the currency before the work starts and record it on the contract. Changing currency mid-project confuses both sides and complicates your books.

Confirm the VAT treatment for the specific service and client type. For B2B services to foreign businesses this is usually reverse charge, but never assume it blindly.

Collect the client’s complete legal details, including their registered name, address and VAT number. Incorrect details cause rejected invoices and delayed payment.

• Agree the currency.
• Confirm the VAT treatment.
• Collect the client’s VAT number.
• Agree the payment method.

On the invoice

State the currency clearly, add any reverse-charge note and VAT number, and use a payment method that works across borders — a SEPA transfer for EUR, or your QR-bill for Swiss/Liechtenstein clients.

Show the currency on the invoice unambiguously, including any relevant ISO code. An amount without a clear currency is a recipe for a wrong payment.

Include the reverse-charge note and the client’s VAT number where they apply. These two details justify why no VAT was charged.

Choose a payment method the client can actually use. A SEPA transfer for euro clients or a QR-bill for Swiss and Liechtenstein clients removes friction from the payment.

• Show the currency clearly.
• Add the reverse-charge note and VAT number.
• Use a payment method that works for the client.

Make it easy to pay

Foreign clients may not recognise a payment method that is obvious to you. Use a method that is standard in their country rather than one that is only familiar at home.

Provide a clear payment reference and repeat it in the email that accompanies the invoice. A missing reference is one of the most common causes of delayed reconciliation.

Consider writing the invoice in the client’s language or in English when selling abroad. A client who can read the invoice is a client who can approve it quickly.

• Use a method familiar to the client.
• Provide a clear payment reference.
• Write in the client’s language where helpful.

Handle the exceptions

Some countries impose withholding tax or other local requirements on cross-border invoices. Check whether the client’s country has rules that affect you before you send the first invoice.

A few countries require specific invoice wording or registration numbers. A quick check with the client or a local contact can surface these before they block payment.

Keep a short checklist per country or client type so each new invoice follows the same steps. Repeating the work from memory is where mistakes creep in.

When a new country or client type appears, spend ten minutes documenting its rules once. That note pays off every time you invoice that country again.