How to Invoice International Clients (Currency & Wise)

SL
SmoothLedger Editorial TeamVerified financial & SaaS content
Published December 15, 20259 min read
Guide Summary & Key Takeaways

Billing a client in London while you are in New York? Avoid massive bank fees by choosing the right currency and transfer method on your invoice.

The internet is global, but banking is stubbornly local. Landing a client in the UK, Europe, or Australia is great for a freelancer, but getting paid can be a headache of hidden fees, terrible exchange rates, and delays.

If you send a standard invoice without thinking about borders, you might lose 5-10% of your paycheck to "intermediary bank fees." On a $5,000 invoice, that's $250-$500 you'll never see again. Here is how to invoice internationally the right way.

Rule 1: Agree on the Currency First

Before you sign the contract, decide: are you getting paid $1,000 USD or €900 EUR? Exchange rates fluctuate daily.

  • If you bill in YOUR currency (USD): You receive exactly $1,000. The client pays the conversion fee. This is the safest option for you.
  • If you bill in THEIR currency (EUR): You are being nice to the client, but you take the currency risk. If the Euro drops 5% before they pay, you lose $50.
Pro Tip: For ongoing client relationships, agree on a currency upfront and add a clause to your contract: "All invoices are denominated in USD. Payment must be in USD or the equivalent in [currency] at the exchange rate on the payment date."

Rule 2: Use the Right Invoice Template

Formatting matters in international invoicing.

  • Date Format: The US uses MM/DD/YYYY. The rest of the world uses DD/MM/YYYY. A due date of "05/04/2026" could mean April 5th or May 4th. Use text dates (e.g., "5 April 2026") to avoid confusion.
  • Paper Size: The US uses "Letter." Europe uses "A4." A professional generator handles this sizing automatically.
  • VAT/Tax Number: If billing EU clients, they may need your tax identification number on the invoice.

If you are billing a UK client, use our UK Invoice Template. It automatically formats the currency symbol (£) and date format correctly.

Rule 3: Avoid Bank Wires (SWIFT)

Traditional bank wires are slow (3-5 business days) and expensive—often $30-$50 per transaction on each side, plus a hidden 2-4% exchange rate markup.

The Solution: Use a service like Wise (formerly TransferWise). You can open a "local" bank account in the client's country. Your UK client pays you in Pounds using local UK bank details (free for them—it's a domestic transfer). You then convert to USD inside the app at the real mid-market exchange rate, saving 3-5% on every payment.

Put these "Local" bank details directly on your invoice notes to get paid faster and keep more of your money.

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