Why Currency Risk Is a Real Problem for EU Freelancers

If you invoice in a currency that isn't your own, you face three distinct types of FX risk:

  1. Rate movement risk: The exchange rate between invoice date and payment date moves against you
  2. Spread risk: The rate you actually receive when converting is worse than the reference rate
  3. Late payment compounding: The client is slow to pay and the rate has also moved — both losses stack

Currency clauses on invoices address risks 1 and 3 directly. Risk 2 is managed by choosing a better payment platform (Wise, Revolut) instead of a retail bank conversion.

How significant is rate movement risk? EUR/GBP moved from 0.8320 to 0.8780 between January and August 2024 — a 5.5% swing in eight months. On a £10,000 contract, that's a £550 difference in EUR value depending purely on when the client got around to paying. Without a currency clause, you have no legal basis to recover that loss.

Types of Currency Clauses

1. Fixed Rate Clause

Lock in a specific exchange rate at contract signing. Both parties know the EUR-equivalent from day one, regardless of market movements.

Best for: Long-term contracts and fixed-price projects over three months or more.

Sample language:

"All amounts shall be settled in GBP. For financial reporting and VAT purposes, the EUR equivalent is calculated at a fixed rate of 1 EUR = 0.8450 GBP, agreed at contract signature on [date]. This rate applies throughout the contract term regardless of subsequent exchange rate movements."

Trade-off: If rates move significantly, one party ends up disadvantaged. Clients may push back on a fixed rate clause for long contracts. Consider splitting the difference with a rate band clause (triggered only if the rate moves beyond ±5%).

2. Rate-at-Invoice-Date Clause

The conversion rate is fixed at the invoice date. If the client pays late, they owe the same EUR-equivalent — you're protected from post-invoice rate movements.

Best for: Project-based work with clear, discrete invoice dates.

Sample language:

"Payment is due in EUR. The EUR amount stated on this invoice is calculated using the ECB reference rate on the invoice date ([date]: 1 EUR = [X] GBP). Payment of the stated EUR amount is required regardless of subsequent exchange rate movements. Clients choosing to pay in GBP must ensure the EUR-equivalent is received in full."

3. Rate-at-Payment-Date Clause

The EUR-equivalent adjusts based on the ECB rate when payment is actually received. FX risk is shared — you benefit if rates move in your favour, client benefits if they move in theirs.

Best for: Short payment terms (7–14 days) where rate risk is limited.

Sample language:

"The GBP amount stated is indicative. Final settlement requires the EUR equivalent, calculated at the ECB reference rate on the date payment is received. Any shortfall versus the invoiced EUR amount arising from exchange rate movements is payable on demand within 7 days of notification."

4. EUR-Only Clause

The simplest approach: you invoice in EUR, accept only EUR, and the client converts on their end.

Best for: Any situation where your client has access to EUR accounts or can instruct their bank to send EUR.

Sample language:

"All invoices are denominated in EUR. Payment must be made in EUR via SEPA transfer to [IBAN]. Payments received in other currencies will not be treated as full settlement. Re-conversion costs and any exchange losses from payment in an alternative currency are the client's responsibility."

Template Currency Clause for EU Freelancers

Add this block to your invoice footer or standard terms and conditions. Adapt the bracketed fields to your situation:

Currency and Exchange Rate Terms

This invoice is issued in [EUR / GBP / USD].

Where the invoice currency differs from EUR:

  • The EUR equivalent for VAT reporting is calculated at the ECB reference rate on the invoice date.
  • The ECB reference rate applicable is: 1 EUR = [X] [currency], published [date]. Source: ecb.europa.eu/stats/eurofxref
  • Full settlement must be received in the invoiced currency. Exchange losses arising from payment in an alternative currency are the client's responsibility.
  • Where payment is received after the due date, the EUR-equivalent is recalculated at the ECB rate on the date of actual receipt. Any shortfall against the invoiced EUR amount is due immediately, in addition to statutory late payment interest.

Late Payment and FX Compounding: How to Quantify Your Claim

EU Directive 2011/7/EU entitles you to statutory interest on overdue B2B invoices at the ECB's main refinancing rate plus 8 percentage points. With the ECB rate at 2.65% in early 2026, that's 10.65% annual interest — automatically applicable to business-to-business invoices with no need to specify it.

The Directive does not address FX losses. Your currency clause fills this gap. Here's how to calculate a combined claim when a client pays late in a depreciating currency:

Example:

  • Invoice: £4,000 due 1 February (ECB EUR/GBP on 1 February: 0.8400 → EUR equivalent: €4,761.90)
  • Payment received: 1 April (ECB EUR/GBP on 1 April: 0.8650 → EUR received at conversion: €4,624.28)
  • FX loss: €137.62
  • Statutory interest at 10.65% annual on £4,000 for 59 days: approximately £69 (€80)
  • Total additional claim: approximately €218

Send a formal notice referencing both your invoice currency clause and EU Directive 2011/7/EU. Keep ECB rate screenshots for both dates as evidence.

What to Do if a Client Pays in the Wrong Currency

When a client pays GBP despite a EUR-only invoice:

  1. Do not mark the invoice as settled in your accounting system
  2. Calculate the EUR amount received (GBP received × ECB EUR/GBP rate on date received)
  3. Calculate the shortfall against the invoiced EUR amount
  4. Send a written notice within 5 business days referencing your invoice terms
  5. Issue a supplementary invoice for the shortfall
  6. If using Wise or Revolut, you can return the incorrect currency payment and ask the client to resend correctly

Prevention is more effective than recovery. On every invoice, make your EUR IBAN the most prominent payment detail. Add a bold line: "EUR payments only — payments in other currencies will not be accepted as full settlement." Most clients pay in EUR if you make it frictionless and the instruction is unambiguous.

Building Currency Protection Into Your Workflow

For ongoing client relationships, address currency terms in your initial contract or onboarding documentation rather than introducing them retrospectively on invoices. A signed contract clause is harder to dispute than invoice footer terms, especially with clients in non-EU countries where invoice terms may carry less legal weight.

For one-off projects above €5,000, consider requesting a 50% deposit in EUR before commencing — this locks in at least half your income at a known rate and eliminates the late-payment FX risk on that portion entirely.

Track the live ECB rate for any open GBP or USD invoices using the EU Biz Tools Currency Converter — so you know in real time what your outstanding receivables are worth in EUR, and when a rate movement is serious enough to follow up on payment.