Invoicing US clients from Europe: the fields that actually matter

Most European consultants sending invoices to US clients lose days to one of two problems: the client's accounts payable team kicks the invoice back for a missing field, or the wire arrives three weeks late because the payment reference didn't match. Neither is a billing dispute. Both are fixable before you hit send.

What a US corporate AP team actually needs to see

US companies do not expect VAT on invoices from foreign vendors. What their AP teams do expect is a clean, unambiguous document that maps to a purchase order or SOW. If your invoice doesn't give them that, it sits in a queue.

The non-negotiable fields:

• Your legal name and address (the entity that signed the contract, not a trading name)
• Your tax identification number: for a US-registered entity, an EIN; for a EU-based sole trader or LLC equivalent, include your local tax ID anyway. Many US AP systems have a mandatory vendor TIN field.
• The client's legal entity name exactly as it appears on the PO or MSA. "Acme Corp" and "Acme Corporation" can trigger a mismatch in their ERP.
• A unique invoice number that references the PO or SOW number in a visible field
• Net payment terms written out explicitly: "Net 30 from receipt" rather than just "30 days"
• Wire and ACH details in the body of the invoice. US AP teams prefer ACH (routing + account number) for domestic-equivalent transfers. If you're receiving internationally, include your SWIFT/BIC and IBAN.
• Currency stated once, clearly. If you bill in USD, every line item is in USD. Mixing display currencies on a single invoice breaks automated ingestion.

What about W-8BEN or W-9?

This trips up a lot of European consultants. If your US client pays you more than $600 in a calendar year for services, they are likely required to collect a W-8BEN (for individuals) or W-8BEN-E (for entities) from you before first payment. This is not an invoice field. It's a separate IRS form you complete once per client relationship, certifying that you are a foreign person and not subject to US backup withholding. Keep a signed copy. Send it proactively before the first invoice lands, and you remove one of the most common reasons AP freezes a first payment.

How VAT works when you bill a US client

Short answer: it usually doesn't. If your US client is a business (B2B) and the service is delivered outside the EU, the supply is outside the scope of EU VAT in most member states. You do not charge VAT. You do not write "0% VAT." You write a brief note: "Services supplied outside the scope of VAT per [your country's VAT act reference]."

The reverse-charge rule is for EU-to-EU, not EU-to-US

Reverse-charge VAT (where the buyer accounts for VAT instead of the seller) applies to cross-border B2B supplies within the EU. It does not apply to your $18k monthly retainer billed to a Delaware holding company. Confusing the two leads to invoices with unnecessary VAT notices that confuse US AP teams who have never heard of Article 196 of the EU VAT Directive.

What to write on a USD invoice to a US corporate:

• No VAT line
• A single line: "VAT: not applicable. Services supplied to a non-EU business recipient."
• Your VAT registration number (if you have one), because your own tax authority may still want to see it on outgoing invoices for reconciliation

If your client has a European subsidiary and the contract is with that entity, the rules flip: reverse-charge may apply, and you need a "Reverse charge: VAT to be accounted for by the recipient" notice plus the client's EU VAT number.

Expense reimbursements on the same invoice

Many consultants bundle travel, software, and other out-of-pockets into the same invoice as their retainer fee. This is fine, but structure it clearly.

Use a separate line-item group (an H3 or section break in the invoice) labelled "Expense reimbursements." List each item with the original currency if it differs (for example: "Flight LHR-JFK: £340 / $430 USD at rate 0.791"), and flag that these items are cost pass-throughs, not services. This matters for two reasons:

1. Some US clients have per-category approval limits, and a bundled lump sum will stall in approvals.
2. Your own accountant needs to separate reimbursed costs from taxable revenue.

Sending the invoice and chasing payment without burning the relationship

NET 60 is common for US enterprise clients. NET 90 is not unusual if your contact is at a large tech or media company. The problem isn't the terms themselves. It's the silence between invoice send and payment confirmation.

One practical note on payment references

When you send a wire-payment invoice, include a short reference string (8-12 characters, no spaces) in the "Payment reference" field and tell the client to include it in the wire memo. US banks do pass memo fields through SWIFT. When the payment lands, you match the reference to the open invoice in under a minute instead of emailing your bank and the client's AP team for three days.

Keeping your records clean for both jurisdictions

You are filing tax returns in your home country. Your US client is filing in theirs. The invoice is the only document that connects both records.

Keep PDFs of every invoice, the corresponding W-8BEN on file, and a note of the exchange rate at the date of payment (not the invoice date). If you receive $18,000 in USD and your functional currency is EUR, the EUR equivalent at payment date is what goes on your income statement. ZenPay captures the exchange rate at payment time so your multi-currency wallet and reports reflect the actual received value, not an estimated rate from invoice day.

Export your invoices and payment data to CSV at the end of each quarter. Your accountant will thank you, and you will have what you need if either tax authority ever asks for documentation.

A clean invoice to a US client takes about 90 seconds longer to set up than a domestic one. The fields above are the whole list. Get them right once, save them as a template, and the only thing that changes invoice to invoice is the amount and the PO reference.