How to Invoice International Clients in EUR: Complete Guide

Sending an invoice to a client in another country looks simple. It is not. The VAT treatment changes depending on whether the client is inside or outside the EU. The mandatory fields change depending on the client's country. The payment method changes depending on whether they are inside the eurozone. Get any of these wrong and you either owe tax you did not collect, lose money to FX movements, or wait 90 days for a payment that should have taken three.

This guide walks through every step of invoicing an international client correctly — from currency choice and VAT treatment through to payment rails and what happens when they pay late.

Step 1: Determine the VAT Treatment

The single most important question on any international invoice is: does VAT apply, and if so, whose?

The answer depends on two variables: where the client is located, and whether they are a VAT-registered business (B2B) or a private consumer (B2C).

Intra-EU B2B (reverse charge): The most common scenario for freelancers. If your French client is a registered French business and you are a German freelancer, you issue the invoice with no German VAT. The French client accounts for French VAT in their own return. You must include their French VAT number and add the reverse charge statement.

Outside-EU (zero-rated export): A UK client, a US company, a Canadian agency — all zero-rated. You charge no VAT and they pay nothing extra. Keep evidence of the client's non-EU status.

Intra-EU B2C: If you sell digital services to private individuals in other EU countries, OSS rules apply. See our guide on VAT for digital services for the full breakdown.

Step 2: Include All Mandatory Fields for International Invoices

Standard domestic invoices miss several fields that become mandatory or critical when crossing borders.

Always required for international B2B invoices:

• Your full legal name and registered address
• Your VAT number (in the format of your country — e.g., DE123456789)
• A sequential invoice number unique to your invoice series
• Invoice date and due date
• Full description of services (vague descriptions cause customs and VAT problems)
• Net amount, applicable VAT rate (or zero-rated/reverse charge statement), and total
• Client's VAT number — mandatory for reverse charge invoices
• Your IBAN and BIC for payment
• Currency of the invoice

For reverse charge invoices, add:

"Reverse charge — VAT to be accounted for by the recipient. Article 44, Council Directive 2006/112/EC."

For zero-rated export invoices (outside EU), add:

"VAT not applicable — export of services outside the EU."

Missing the reverse charge statement or the client's VAT number can result in your tax authority treating the invoice as a domestic taxable supply, making you liable for the VAT you did not charge.

Step 3: Choose Your Currency and Manage FX Risk

For clients in the eurozone, always invoice in EUR. There is no FX risk and SEPA payments are fast (one working day for standard SEPA credit transfers).

For non-EUR clients, you have a choice:

Invoice in EUR: Clean for your accounting. The client bears the FX risk. Some clients resist this, particularly US and UK clients accustomed to paying in their own currency.

Invoice in their currency: Faster payment, better client experience. You bear the FX risk. If you invoice £2,000 and sterling drops 5% by the time you convert, you receive the equivalent of £1,900.

Practical middle ground: For recurring clients, agree on a fixed EUR rate reviewed quarterly. For one-off projects, invoice in EUR or add a 3–5% FX buffer to non-EUR pricing.

Your accounting records must always show amounts in EUR (or your domestic currency), so if you invoice in USD, record both the USD amount and the EUR equivalent at the ECB rate on the invoice date.

Step 4: Choose the Right Payment Rail

For EU clients in EUR, SEPA is the standard. Always provide your IBAN (e.g., DE89370400440532013000) and BIC (e.g., COBADEFFXXX). No other details are needed.

For non-EU clients — particularly US companies — SWIFT is the standard. You need your IBAN, BIC/SWIFT code, and your bank's full address. Some US clients paying from US bank accounts also need an ABA routing number; check with your bank's international transfers desk.

For smaller amounts (under €2,000), Wise Business significantly reduces transfer fees compared to traditional SWIFT wires — the client sends in their local currency and you receive EUR.

Specify on the invoice who bears transfer fees: "All bank transfer fees to be borne by the payer" is standard. This protects you from receiving less than the invoiced amount due to intermediary bank deductions.

Step 5: Know the Late Payment Rules

EU Directive 2011/7/EU on combating late payment in commercial transactions provides a powerful legal framework — but it applies only to intra-EU B2B transactions.

Key provisions:

• Default payment term: 30 days if no term is specified in the contract
• Maximum enforceable term: 60 days for most B2B transactions (longer terms are unenforceable unless explicitly agreed and not grossly unfair)
• Statutory late payment interest: 8 percentage points above the ECB's reference rate (approximately 10.65% per annum in early 2026)
• Flat compensation: Minimum €40 automatically due for each late payment to cover recovery costs
• Recovery costs: You can claim reasonable recovery costs beyond the €40 flat fee

For non-EU clients, the Directive does not apply. Your contract's governing law determines late payment remedies. Always specify payment terms, late payment interest, and governing law in your contract or on your invoice terms.

Country-Specific Requirements: What Changes by Destination

Several EU countries have mandatory e-invoicing or structured invoice format requirements that affect how you invoice them — especially for public sector clients.

For private sector clients in most EU countries, PDF invoices remain legally valid in 2026. However, if you regularly invoice German, Italian, or French clients, check whether they are a public body or whether their accounts payable team requires a structured format.

5 Real Mistakes and Their Consequences

Mistake 1: Charging domestic VAT on an intra-EU B2B invoice. You invoice a Dutch client €5,000 plus 19% German VAT (€950). The Dutch client pays €5,950. Later, a VAT audit reveals the reverse charge should have applied — you owe the €950 you incorrectly charged to Germany and must refund the Dutch client. Cost: €950 in tax plus accountant fees.

Mistake 2: Not verifying the client's VAT number. You issue a reverse charge invoice to "Acme BV" using the number they provided. The number is invalid (expired or belongs to a different entity). Your tax authority treats the invoice as a taxable domestic supply. You owe the VAT you did not charge. Cost: up to 23% of the invoice value.

Mistake 3: Using a personal IBAN instead of a business IBAN. Some EU countries (notably Germany and Austria) require invoices to show business bank accounts. A personal IBAN can cause payment processing delays and may not be accepted by corporate clients' finance teams.

Mistake 4: Invoicing outside-EU clients with VAT. A Spanish freelancer charges a US client 21% Spanish VAT. The US client refuses to pay it (correctly — they have no obligation to pay EU VAT). A disputed invoice, a potential bad debt, and an awkward correction are the result.

Mistake 5: No written payment terms for non-EU clients. Without a contract or invoice payment terms specifying currency, due date, and governing law, you have almost no legal recourse if a US or UK client pays late or disputes the amount.

Use our Invoice Generator to create a compliant international invoice with the correct reverse charge wording, fields, and payment details pre-populated. For VAT rate lookups by country, use the EU VAT Calculator.