EUR to GBP for EU Freelancers: Which Exchange Rate to Use on Invoices

The Three Rates EU Freelancers Encounter

When you invoice a UK client in GBP — or when a client pays you in GBP and you need to record the euro equivalent — you will run into three distinct types of exchange rate, each with different implications.

ECB Reference Rate The European Central Bank publishes a reference EUR/GBP rate every working day at approximately 16:00 CET. It is derived from a daily concertation procedure between central banks and represents the mid-market rate at a specific point in time. It is free, authoritative, and accepted by tax authorities across the EU as a legitimate conversion reference. For invoicing purposes, it is usually your best choice.

Mid-Market Rate The mid-market rate (also called the interbank rate) is the midpoint between the buy and sell rates on wholesale currency markets. It is what you see on Google Finance, XE.com, or the EU Biz Tools currency converter. It moves in real time and is typically within 0.1–0.2% of the ECB rate at any given moment. Using a mid-market rate is perfectly valid for invoicing — just document the source and timestamp.

Bank Retail Rate This is the rate your bank offers when you convert currency, and it includes a markup — typically 1.5–4% on top of the mid-market rate. It is not appropriate to use as your reference rate on an invoice, because it does not reflect the true market exchange rate. You may receive funds at something close to your bank's rate if you do nothing, but that is a separate issue from what you state on the invoice.

A Practical Example: €5,000 Invoice to a London Design Agency

Suppose you are a German graphic designer invoicing a UK client for €5,000 worth of work, and they want to pay in GBP.

On the invoice itself, you state the ECB rate of 0.8540 and show both £4,270.00 and the EUR equivalent. When the client pays, you receive the funds via Wise, which converts at approximately 0.8515 — a 0.3% fee rather than a 4% bank margin. Your actual euro receipt is €5,000 × (0.8515 ÷ 0.8540) ≈ €4,985. Compare that to receiving via a bank at 0.82: you would get approximately €4,807 — a loss of €178 on a single invoice.

How to Document the Exchange Rate on Your Invoice

Good documentation protects you in client disputes and tax audits. Include the following on any invoice where a conversion is shown:

1. The foreign currency amount clearly stated (e.g., £4,270.00 GBP)
2. Your functional currency equivalent (e.g., €5,000.00 EUR)
3. The rate applied (e.g., 1 EUR = 0.8540 GBP)
4. The rate source (e.g., "ECB reference rate, 14 April 2026")
5. The date the rate was fixed — ideally the invoice date

A simple line at the bottom of the invoice does the job: "Exchange rate: 1 EUR = 0.8540 GBP (ECB reference rate, 14 April 2026). Final GBP amount may vary by up to 1% due to payment processing."

The disclaimer on the final line is important — it sets realistic expectations if the client's bank converts at a slightly different rate, preventing disputes over a few pounds.

Invoice in EUR or GBP? Understanding Who Carries the Risk

This is a strategic decision that affects both your cash flow and your client relationship.

Invoice in EUR (your currency) You know exactly what you earn. The client bears the FX risk — they may pay more or fewer euros depending on when they convert. This is simpler for your bookkeeping and tax reporting, and appropriate when:

• You have pricing power with the client
• GBP/EUR volatility is elevated (as it often is around UK budget announcements)
• The client is large and accustomed to paying in supplier currencies

Invoice in GBP (client's currency) The client has a simpler experience — they see a pound amount and pay it. But you bear the FX risk. The GBP you receive must be converted to EUR, and the rate you get depends on when you convert and through which channel. This approach makes sense when:

• You are competing with UK-based freelancers on price
• The client insists on GBP invoicing
• You have GBP expenses to offset (natural hedging)

Protecting Yourself from Rate Fluctuation

EUR/GBP is not a stable pair. Between January 2024 and April 2026 it has traded in a range of roughly 0.82–0.88, a swing of about 7%. On a €50,000 annual billings base, a 5% adverse move is €2,500 you did not budget for.

Practical risk-reduction strategies:

• Bill in EUR where possible. The simplest hedge is making it the client's problem.
• Convert frequently, not in bulk. Converting monthly rather than quarterly reduces the chance that one bad rate wrecks a quarter.
• Use rate alerts. Wise, Revolut, and XE.com all offer alerts when EUR/GBP hits a target. If it climbs above 0.87 and you have GBP sitting in an account, convert then.
• Hold a GBP buffer. If you regularly work with UK clients, keep one to two months of expected GBP income in a multi-currency account and convert when the rate is favourable.
• Consider forward contracts for large or long-running projects. If you sign a six-month contract worth £20,000, many fintech providers (including Wise and Revolut Business) offer forward rates. You lock in today's rate for a future conversion.

Step-by-Step: Setting the Rate on Your Next Invoice

1. Go to the ECB's exchange rate page or use a mid-market tool on the invoice date.
2. Note the EUR/GBP rate and the date.
3. Calculate the GBP equivalent of your EUR fee (or vice versa).
4. Add both currency amounts to the invoice, along with the rate and source.
5. Receive payment via Wise or Revolut Business to minimise the gap between the stated rate and your actual receipt.
6. Record the actual EUR received in your accounting software — this is the figure that matters for tax, not the stated invoice rate.

Need to convert EUR to GBP before you raise your next invoice? Use the EU Biz Tools Currency Converter for a real-time mid-market rate with no sign-up required. It shows you the ECB reference rate alongside live data so you can pick the most appropriate figure for your records.