Multi-currency invoicing for freelancers, done right

Billing internationally is one of the real advantages of freelancing, and it comes with a specific set of ways to lose money without noticing. Between conversion spreads, transfer fees, and rate movement between invoice and payment, a careless setup costs several percent of everything you earn abroad.

Which currency should you bill in

Three defensible answers, depending on what you are optimising for:

• Your own currency. You always receive exactly what you quoted. The client carries all exchange risk, which some will accept and some will resent.
• The client's currency. Easiest for them to approve and pay, and often the difference between a fast approval and a procurement discussion. You carry the risk of the rate moving between invoice and payment.
• A dominant third currency, usually USD or EUR. Common in international freelancing, neutral, and widely understood. Both sides carry some risk, and both sides usually accept it.

For long projects and retainers, currency movement stops being a rounding error. If a retainer runs a year in a currency you do not spend, agree a review clause rather than absorbing a 10 percent swing silently.

What the invoice itself must show

• The currency code, explicitly, on every amount. A bare dollar sign is ambiguous across at least five currencies and finance teams will ask.
• One currency per invoice. Mixing currencies on a single document creates a total that means nothing.
• If you show a converted equivalent as a courtesy, label it clearly as indicative and state the rate and date used.
• Tax treatment stated where relevant, since cross border services often carry specific VAT or GST wording obligations.

How to handle the rate in your books

Most systems want your records in your home currency, which means every foreign invoice and every foreign expense needs a conversion at a defensible rate.

• Use a consistent source and stick to it. A central bank daily rate or a documented provider rate. Consistency matters more than which one you pick.
• Convert at the right date. Usually the invoice date for income and the transaction date for expenses, though some systems use the payment date. Follow your local rule.
• Record both amounts. Original currency and converted, on every record. If you keep only the converted figure you cannot reconcile against your bank statement.
• Expect a difference between invoice and payment. The gap between the rate on the day you invoiced and the rate on the day you were paid is a real gain or loss and usually needs recording as such.

The fees that quietly add up

• The exchange margin. Almost always larger than the advertised transfer fee. A 2 percent spread on 40,000 of foreign income is 800 a year.
• Intermediary bank fees on wires. Often deducted mid route, which is why a client sends 2,000 and you receive 1,973.
• Receiving fees charged by your own bank on incoming international payments.
• Payment processor conversion, when a processor converts automatically at a poor rate rather than paying you in the invoiced currency.

Two structural fixes: hold balances in the currencies you invoice in rather than converting on every receipt, and give clients local receiving details in their own country so the payment never becomes an international wire in the first place.

Practical setup

• Set the currency at the client level so every invoice for that client inherits it and nobody has to remember.
• Keep receipts in their original currency and convert consistently at capture time.
• Add a line to the contract on who bears transfer fees. The default should be the client.
• Review long running retainers annually against the rate you agreed.

Invoicy sets currency per client and carries it through the invoice, the PDF, and the reports, and Receiptly keeps foreign expenses in the currency you actually paid.

TL;DR

• Pick a billing currency deliberately: yours, theirs, or a neutral third. Review long retainers annually.
• Show the currency code explicitly, one currency per invoice, and label any indicative conversion.
• Use one documented rate source, convert at the correct date, and store both original and converted amounts.
• The exchange margin costs more than the transfer fee. Hold currency and use local receiving details.