Cross-Border Invoicing Is Normal — and Messy
If you work remotely, export goods, or freelance for clients in other countries, you will invoice internationally. The work itself is no different. The invoicing is significantly more complicated.
You're dealing with multiple currencies, exchange rate fluctuations, international transfer fees, foreign tax rules, withholding tax, and payment methods that vary by country. Get any of these wrong and you lose money — not to the client, but to fees, bad exchange rates, or tax obligations you didn't account for.
This guide covers the practical mechanics. No theory, just the decisions you need to make and the mistakes that cost real money.
Which Currency to Invoice In
This decision affects how much you actually receive. Three options:
Your local currency. You invoice in GBP, USD, or whatever you use domestically. The client handles the conversion and pays the equivalent in their currency (or sends the foreign currency directly). You receive a predictable amount; the client absorbs the exchange rate risk.
The client's currency. You invoice in their local currency. The client pays the exact amount shown. You absorb the exchange rate risk — the GBP or USD equivalent may be slightly more or less than you expected by the time the transfer arrives.
A major reserve currency (USD, EUR, GBP). For contracts between two countries where neither uses a major currency, invoicing in USD or EUR is common. It simplifies things for both parties.
Whatever you choose, write the three-letter ISO code (USD, GBP, EUR, AUD, CAD) on every invoice. A bare "$" sign is ambiguous — it could mean US, Canadian, Australian, Hong Kong, or Singapore dollars.
Payment Methods: Costs and Speed
International payments carry fees that domestic transfers don't. Here is what to expect from the main options:
| Method | Typical Fee | Speed | Best For |
|---|---|---|---|
| SWIFT bank wire | £15-45 sender + intermediary fees | 2-5 business days | Large invoices (£5,000+) |
| Wise (TransferWise) | 0.4-1.5% of amount | 1-2 business days | Small to mid invoices; best rates |
| PayPal | 2.9-4.4% + fixed fee | Instant to 1 day | Small invoices; clients who prefer it |
| Stripe | 1.5-3.5% (cross-border surcharge applies) | 2-7 business days to your bank | Card payments; payment links |
| Payoneer | Up to 2% on FX; $1.50 withdrawal | 2-5 business days | Marketplace payouts; emerging markets |
On a £5,000 invoice, the difference between Wise (roughly £40) and PayPal (roughly £170) is £130. That adds up fast over a year of monthly invoices.
Include at least two payment options on your invoice. A client in Germany may find a SEPA transfer trivial but a SWIFT wire to your Australian bank account expensive and slow. Wise details plus a SWIFT option covers most situations.
Tax on Cross-Border Services
International tax is where things get genuinely complicated. These are the rules that apply most often — but tax law is jurisdiction-specific, so confirm anything material with your accountant.
UK to EU (B2B): services supplied to a VAT-registered business in the EU are outside the scope of UK VAT. You do not charge UK VAT. The client accounts for the tax under the reverse-charge mechanism — they self-assess the VAT on their own return. You must include the client's VAT number on your invoice and note "Reverse charge: customer to account for VAT" (or similar wording). You still report these supplies on your UK VAT return as zero-rated exports.
UK to non-EU (B2B): generally outside the scope of UK VAT. You invoice without VAT and note it as an export of services.
EU to EU (B2B): reverse charge applies. No VAT charged; the buyer self-assesses.
US clients (you're non-US): if you are not a US person or entity, your US client may ask you to complete a W-8BEN form (for individuals) or W-8BEN-E (for entities). This certifies your non-US status and can reduce or eliminate US withholding tax on your payments. Without it, the client may be required to withhold 30% of your payment and remit it to the IRS. Complete the form promptly — it's straightforward and saves you a significant chunk of your invoice amount.
Withholding tax generally: some countries require the paying company to withhold a percentage (often 10-30%) of cross-border service payments and remit it to their local tax authority. This is common in India, Brazil, and several other countries. Check whether a tax treaty between your country and the client's country reduces the rate. You can usually claim a credit for foreign withholding tax on your own tax return, but the cash flow impact is real.
Structuring the Invoice for International Clients
An international invoice includes everything a domestic invoice does, plus a few extras:
- Currency code — ISO three-letter code (GBP, USD, EUR) on every amount.
- Your tax ID — VAT number, ABN, BN, EIN, as applicable.
- Client's tax ID — particularly for EU reverse-charge invoices.
- Payment instructions for international transfers — SWIFT/BIC code, IBAN (for European banks), routing number + account number (for US banks), or Wise/PayPal details.
- Tax treatment note — "Zero-rated export of services," "Reverse charge applies," or "No VAT — supplier not registered," depending on the situation.
- Country of supply — stating both your country and the client's country makes the tax treatment clear.
Our invoice generator includes fields for all of these. For UK-specific formatting, see the UK freelance template.
Dealing with Exchange Rate Differences
You invoice €5,000. By the time the client pays two weeks later, the exchange rate has moved and you receive £4,180 instead of the £4,250 you expected. That £70 difference is an exchange rate loss, and it's a normal cost of international invoicing.
Strategies to manage FX risk:
Invoice in your own currency. Simplest solution. The client takes the FX risk.
Add an FX buffer. If you must invoice in the client's currency, add 2-3% to your rate. This covers typical short-term fluctuations.
Get paid quickly. Shorter payment terms (Net 7 or Net 15) reduce the window for rate movements. This is one of the strongest arguments for short terms on international invoices.
Use Wise multi-currency accounts. If you invoice in EUR regularly, hold a EUR balance and convert when rates are favourable rather than on each transaction.
For your bookkeeping, record the invoice at the exchange rate on the date of issue. When payment arrives, the difference (positive or negative) is an FX gain or loss. Your accounting software should handle this automatically.
Mistakes That Cost Money on International Invoices
- Missing the W-8BEN for US clients. Without this form, the client may withhold 30% of your payment. Complete it before the first invoice.
- Charging VAT on reverse-charge supplies. If you charge UK VAT to a VAT-registered EU business, the client can't reclaim it (it's not their country's VAT) and you've overcharged. Issue a credit note and re-invoice correctly.
- Not specifying who pays transfer fees. A £5,000 SWIFT payment can arrive as £4,955 after intermediary bank deductions. Specify fee responsibility on every invoice.
- Using the wrong currency symbol. "$" without "USD" or "AUD" creates genuine ambiguity. Always use the ISO code.
- Ignoring withholding tax. If your client is in a country that requires withholding, the net amount you receive will be less than the invoice total. Factor this into your pricing or claim treaty relief.
For the basics of invoice writing, see our step-by-step invoice guide.