How to choose invoice currency: who carries the FX risk

A fixed USD 1,000 invoice remains a USD 1,000 claim even when you budget in EUR. A EUR 1,000 price payable in USD under an agreed conversion rule is different: the USD payment amount changes under that rule. Do not leave the client to choose whichever conversion date or website produces a lower payment.

Use an unambiguous currency code beside amounts. Agree any permitted alternative settlement currency, the rate source and date, rounding, treatment of bank holidays and the party paying transfer charges before invoicing. These commercial details do not replace local invoice or tax requirements.

Illustration before fees: USD 1,000 converts to EUR 900 at EUR 0.90 per USD. At EUR 0.84 it becomes EUR 840. If the related EUR cost is 800, the remaining amount falls from EUR 100 to EUR 40. A 6.7% fall in the conversion rate reduces this example’s remainder by 60%; it is not a forecast or a tax calculation.

Holding the USD after receipt leaves that EUR exposure open until conversion or matching USD spending. A multi-currency account may allow that choice but does not guarantee a better future rate. Matching the invoice to a known EUR cost removes that particular currency mismatch; late payment, fees, changing prices and costs in other currencies remain.

Start with the currency of the costs this work must fund and the payment routes both parties may actually use. Confirm the provider supports your country, business activity, receiving currency and incoming transfer type. Local account details do not automatically make a transfer free, and not every multi-currency account supplies every currency’s local details.

Compare the net amount available for your bills after all quoted deductions. A mid-market or central-bank reference rate is a benchmark, not necessarily an executable customer quote. Avoid counting a markup twice when it is already embedded in the quoted converted amount.

Agree an invoice currency, amount, due date and fee treatment. If a long project needs exchange-rate review, agree the review trigger and how a revised price is approved in advance. A buffer in your internal budget is not permission to add an undisclosed fee or unilaterally rewrite a signed price.

After payment, reconcile the contractual amount with the actual credited currency, conversion and deductions. Preserve the invoice and settlement evidence; the tax authority may require a different conversion method for reporting. Review future terms when your cost base changes, and verify new bank details separately from the invoice email.