How to Invoice International Clients from the UK

When invoicing international clients, the first question is which currency to bill in. You have three main options, each with trade-offs.

Invoice in GBP (£) — The simplest option for you. Your income is already in pounds, making bookkeeping and tax reporting straightforward. The downside is that your client bears the exchange rate risk and may incur conversion fees on their end.

Invoice in the client's currency — For example, USD for American clients or EUR for European ones. This makes it easier for the client to pay, which can speed up payment. However, you'll need to convert the amount to GBP for your tax records, and the exchange rate may have moved between invoicing and receiving payment.

Invoice in a neutral currency — Some international freelancers invoice in USD regardless of the client's location, as it's the most widely used business currency. This works well if you have multiple international clients.

For HMRC purposes, if you invoice in a foreign currency, you must convert the amount to GBP using the exchange rate on either the date of the invoice or the date of payment — pick one method and apply it consistently. HMRC publishes monthly exchange rates you can use, or you can use the spot rate from a recognised source like the Bank of England.

Consider the fees too. Receiving USD or EUR into a standard UK bank account often incurs conversion charges of 2-4%. Services like Wise (formerly TransferWise) offer multi-currency accounts that let you hold and convert foreign currencies at much lower rates, typically around 0.4-0.6%.

Standard UK bank transfers (Faster Payments via sort code and account number) don't work for international payments. You'll need to offer alternative payment methods that work across borders.

• Wise (TransferWise) — The best option for most freelancers. You get local account details in USD, EUR, AUD, and other currencies, so clients can pay as if they're making a domestic transfer. Conversion fees are transparent and low (typically 0.4-0.6%). Transfers usually arrive in 1-2 business days.
• PayPal — Widely used and familiar to clients globally. The main downside is fees: PayPal charges around 2.9% + a fixed fee per transaction, plus an additional conversion fee of 3-4% if currencies don't match. For a £1,000 invoice, that's roughly £60-70 in fees.
• International bank transfer (SWIFT) — The traditional option. You provide your IBAN and BIC/SWIFT code. Transfers take 3-5 business days and typically cost £15-30 in fees on each end, plus exchange rate margins. Best for large invoices where the fixed fees are proportionally small.
• Stripe — If you send invoices with a payment link, Stripe lets clients pay by card. Fees are 1.4% + 20p for UK cards and 2.9% + 20p for international cards. Convenient for clients but adds up on large invoices.

Whichever method you choose, state it clearly on your invoice. Include all necessary details: Wise account details, PayPal email, or IBAN/SWIFT for bank transfers. Making it easy to pay you is the single best thing you can do to get paid quickly.

VAT treatment of international invoices depends on what you're selling and where your client is. Get this wrong and you could over-charge your client or under-report to HMRC.

Services to business clients outside the UK — Under the "place of supply" rules, most services supplied to business customers (B2B) outside the UK are outside the scope of UK VAT. This means you don't charge VAT at all. On your invoice, note: "Outside the scope of UK VAT — reverse charge applies".

Services to individual consumers outside the UK — The rules vary by service type. For most digital and professional services supplied B2C to EU consumers, you may need to register for the EU's One Stop Shop (OSS) scheme and charge local VAT. For non-EU consumers, services are generally outside the scope of UK VAT.

Goods exported outside the UK — Physical goods exported from the UK are zero-rated for VAT purposes. You charge 0% VAT but must keep evidence of export (shipping documents, tracking). Zero-rated is different from exempt — zero-rated supplies still count as taxable turnover and you can reclaim input VAT.

If you're not VAT-registered, international invoicing is simpler: you don't charge VAT to anyone, domestic or international. But you still need to monitor your turnover — if your total taxable turnover (including zero-rated international sales) exceeds £90,000 in any 12-month period, you must register.

When in doubt about VAT on international services, check VAT invoice requirements or consult an accountant. Getting the VAT treatment wrong can result in penalties from HMRC.

The reverse charge is a VAT mechanism that shifts the responsibility for reporting VAT from the supplier (you) to the customer (your client). It applies to most B2B services supplied to clients in other countries.

Here's how it works in practice:

1. You supply a service to a business client in, say, Germany.
2. Instead of charging UK VAT on your invoice, you issue the invoice without VAT.
3. Your German client "self-accounts" for the VAT — they report it on their own VAT return as both output tax and input tax. The net effect for them is zero, but it keeps the VAT reporting in the correct country.
4. On your invoice, you include the note: "Reverse charge: customer to account for VAT".
5. You also need your client's VAT number (or tax ID) on the invoice.

For your UK VAT return, you include the sale value in Box 6 (total value of sales excluding VAT) but not in Box 1 (VAT due on sales). If you file a Making Tax Digital (MTD) return, ensure your software handles this correctly.

The reverse charge applies to most "general rule" services — consulting, design, development, marketing, and other professional services. Some services have special rules (e.g. land-related services are taxed where the property is located), so check the specific rules for your service type.

If your client is a consumer (not a business), the reverse charge does not apply. You may need to charge UK VAT or the local VAT rate depending on the service type and the customer's location.

Beyond currency and VAT, here are practical tips that make international invoicing smoother.

Agree currency and payment method upfront. Discuss this before you start work, ideally in your contract. Specify who bears conversion fees — typically the client pays their bank's fees and you pay yours.

Include all payment details. International clients can't use a UK sort code and account number. Always include your IBAN, BIC/SWIFT code, and bank address for wire transfers. If using Wise, include the local account details for their currency.

Use clear, simple English. If your client's first language isn't English, keep invoice descriptions straightforward. Avoid idioms, abbreviations, or UK-specific jargon.

State the payment currency on the invoice. Make it unambiguous: "Total due: USD 2,500.00" is clear. Just "2,500" could be interpreted as pounds, dollars, or euros depending on who's reading it.

Factor in transfer times. International payments take longer — 2-5 business days is typical. Set your payment terms accordingly. If you normally use Net 14, consider Net 21 or Net 30 for international clients to account for processing time.

Keep records of exchange rates. For your Self Assessment tax return, you'll need to report all income in GBP. Record the exchange rate you used for each invoice conversion and keep a note of where you sourced the rate (e.g. HMRC monthly rates or Bank of England spot rate).

Consider time zones for follow-ups. If you're chasing a late payment, send your follow-up during the client's business hours, not yours. A reminder that lands at 3am their time may get buried.