How to Invoice Across Borders: A Practical Guide

Invoicing across borders is one of the most practical day-to-day challenges for international freelancers. An invoice that works perfectly for domestic clients may be incomplete, non-compliant, or confusing when sent to a client in another country. Getting your invoicing right matters not only for getting paid promptly but also for meeting legal requirements in both your country and your client's country. Here is a general guide to the key considerations.

Choosing the right currency

One of the first decisions is which currency to invoice in. You can typically choose to invoice in your own local currency, the client's currency, or a widely used international currency like USD or EUR. Each choice has trade-offs. Invoicing in your own currency shifts the exchange rate risk to the client, which some clients may resist. Invoicing in the client's currency makes it easier for them to pay but means you bear the exchange rate fluctuation. Using a major international currency can be a reasonable middle ground, especially when neither party's local currency is widely traded. Whatever you choose, it is important to agree on the currency upfront and specify it clearly on every invoice. You should also keep records of the exchange rates at the time of invoicing and at the time of payment for your own tax reporting purposes.

Required invoice fields

The specific information required on an invoice varies by country, but most jurisdictions expect at least the following: your full legal name or business name, your address, the client's name and address, a unique invoice number, the date of the invoice, a clear description of the services provided, the amount due, and payment terms. If you are registered for VAT or GST, you will generally also need to include your registration number and any applicable tax amounts. Some countries have additional requirements, such as a tax identification number, bank account details in a specific format, or a reference to the legal basis for any tax exemption. It is worth checking the invoicing requirements in both your country and your client's country to make sure your invoices are compliant.

Reverse charge and tax notes

When the reverse charge mechanism applies to a cross-border service, the freelancer typically needs to include a specific note on the invoice indicating that the client is responsible for accounting for VAT or GST. The exact wording required varies by jurisdiction, but it generally needs to make clear that no VAT or GST has been charged and that the reverse charge applies. Omitting this note, or using incorrect language, can create complications for your client and may raise questions during a tax audit. If you are unsure whether reverse charge applies to your specific transaction, it is advisable to check with a tax professional or your local tax authority.

Dealing with withholding tax

In some countries, clients are required to withhold a percentage of payments made to foreign contractors and remit it to their local tax authority. If your client withholds tax from your payment, you should request a withholding tax certificate or receipt that documents the amount withheld. This certificate is important because you may be able to use it to claim a foreign tax credit in your own country, reducing your overall tax burden. Your invoice should clearly state the gross amount due so that both parties have a clear record, even if the net payment you receive is lower after withholding. The withholding rates and procedures vary by country and may be reduced by an applicable tax treaty.

Invoice numbering and record retention

Most tax authorities require that invoices be numbered sequentially and uniquely. This means each invoice you issue should have a distinct number that follows a logical sequence. Gaps in your numbering sequence can raise questions during an audit. It is also important to maintain copies of all invoices you issue and receive for the retention period required by your jurisdiction, which is typically several years from the date of filing the relevant tax return. Digital storage is generally acceptable, but check your country's specific requirements. Organizing your invoices by client, date, and currency can make tax time significantly easier and help you respond quickly if a tax authority requests documentation.

Practical invoicing checklist

• Agree on currency, payment method, and payment terms with your client before starting work.
• Include all legally required fields for both your jurisdiction and your client's jurisdiction.
• Add the appropriate VAT, GST, or reverse charge notation if applicable.
• State the gross amount clearly, noting any expected withholding separately.
• Use sequential, unique invoice numbers.
• Keep copies of all invoices and related correspondence for the required retention period.
• Record the exchange rate used at the time of invoicing for your own tax reporting.

Invoicing requirements vary by country and change over time. This article provides general guidance only and is not a substitute for professional advice tailored to your specific jurisdictions and circumstances.

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