International Invoicing Guide: Currency, Tax & Compliance

International invoicing adds work that domestic billing doesn't: currencies, cross-border tax treatment, other countries' invoice rules and payment methods that work across borders. Getting them right the first time is what gets you paid without corrections, for a freelancer with one client abroad or a business with clients in several countries. The European Commission's VIES VAT number check and HMRC's guidance on exports and supplying goods abroad are good starting points for EU and UK trade.

This guide covers the main rules, tax implications and practical steps. It is general information, not tax or legal advice; tax treatment depends on what you sell, where you and your client are established and whether either of you is registered. Last reviewed 28 October 2026.

When Does an Invoice Become "International"?

An invoice is international when the supplier and the buyer are in different countries. That raises questions a domestic invoice doesn't:

• Currency: which currency should the invoice be in?
• Tax treatment: do you charge VAT or GST, or does a reverse charge or zero rate apply?
• Compliance: which country's invoice rules apply to you?
• Payment method: how will the client actually send money across borders?
• Exchange rates: how do you convert the amount for your own accounts and tax returns?

Multi-Currency Invoicing

Which Currency Should You Invoice In?

You have three options:

The practical answer: invoice in whatever currency your contract specifies. If it doesn't say, agree one in writing before you invoice. Our multi-currency invoicing guide covers the trade-offs in more detail.

Handling Exchange Rates

When you invoice in a foreign currency, you usually need to convert the amount to your home currency for your accounts and tax returns. Which rates are acceptable is set by your own tax authority:

• UK VAT: if you issue a VAT invoice in a foreign currency, the total VAT must also be shown in sterling, converted using a method HMRC accepts, such as a UK market rate at the time of supply or HMRC's published period rates (HMRC VAT Notice 700).
• US federal tax: you report in US dollars and convert foreign-currency amounts using the exchange rate prevailing when you receive, pay or accrue the item (IRS).
• EU VAT: the VAT Directive lets member states use the latest selling rate on the most representative exchange market or the ECB's rate, and each country sets the detail.
• Contracted rate: if your contract fixes an exchange rate for pricing, invoice at that rate but still convert for tax using a rate your tax authority accepts.

Whatever you use, write down the rate and its source for every foreign-currency invoice. See invoice currency conversion for worked examples.

Exchange Rate Gains and Losses

When the exchange rate moves between invoicing and payment, you have a gain or a loss:

• Invoice for €10,000 when EUR/USD = 1.10: recorded as $11,000
• Payment received when EUR/USD = 1.12: you receive $11,200
• Exchange rate gain: $200

How that gain or loss is taxed depends on your country and accounting method, so ask your accountant. Our guide to hedging currency risk covers ways to reduce the swings.

Cross-Border Tax Rules

Tax treatment is the most complex part of international invoicing. The rules depend on what you sell, where you are established and where your client is.

B2B Services: The General Rule in the EU and UK

Under EU and UK VAT, the general rule for business-to-business services is that the place of supply is where the customer belongs, not where the supplier is (HMRC VAT Notice 741A). Many other VAT and GST systems follow a similar destination principle, but the details and exceptions (land, events, transport and others) differ, so don't assume the rule carries over.

In practice:

• A UK consultant invoicing a US company for general business services usually does not charge UK VAT
• A business client in the EU or UK may have to account for the VAT itself under the reverse charge
• A US designer invoicing a German company has no US federal VAT to charge; whether any state sales tax applies to services depends on the state

EU VAT Reverse Charge

When an EU business supplies general services to a business in another EU country, the customer accounts for the VAT (Article 196 of the VAT Directive, Directive 2006/112/EC):

1. The supplier issues an invoice without VAT
2. The invoice carries the mention "Reverse charge"
3. Both the supplier's and the customer's VAT identification numbers are on the invoice
4. The customer self-assesses VAT in their own country

Before you apply it:

• The customer must be acting as a business (a taxable person)
• Check the customer's VAT number in VIES and keep the result
• The service must fall under the general B2B rule rather than an exception

Our VAT invoicing guide covers the full invoice content for VAT.

Selling to EU Consumers (B2C)

If you sell telecommunications, broadcasting or electronic services (such as software downloads or streaming) to consumers in other EU countries, VAT is generally due in the consumer's country at that country's rate. You can declare it through the One Stop Shop (OSS) instead of registering in each country. A supplier established in one EU member state whose cross-border sales of these services and intra-EU distance sales of goods stay under €10,000 a year can apply its home country's VAT instead. That threshold does not apply to suppliers established outside the EU (EU VAT One Stop Shop).

UK Post-Brexit Rules

Since Brexit, the UK is outside the EU VAT system:

• UK to EU B2B services: generally no UK VAT is charged on general services, and the EU customer accounts for VAT under the reverse charge
• EU to UK B2B services: no EU VAT is charged on general services, and the UK business accounts for VAT under the UK reverse charge
• UK to EU goods: export rules and evidence apply, and import VAT is due in the destination country

See HMRC's guidance on the place of supply of services and our UK invoice requirements.

US Sales Tax and International Invoices

The US has no federal VAT. Sales tax is set by states (and some local governments), applies mainly to goods, and covers some digital products and services in some states. For international invoicing:

• US business selling services abroad: whether state sales tax applies depends on the state and the service; many services delivered abroad are outside its scope
• Foreign business selling to US clients: a state can require you to collect its sales tax if you have nexus there, which can include economic nexus from sales alone
• Goods shipped internationally: may face customs duties and import taxes in the destination country

GST in Australia, India and Canada

Australia: many services supplied to overseas clients and consumed outside Australia are GST-free, but there are conditions. Check the ATO's guidance on GST and exports before you leave GST off. See our Australian invoice requirements.

India: exports of services are zero-rated supplies under the IGST Act when the conditions are met, including payment in convertible foreign exchange or in Indian rupees where the Reserve Bank of India permits. See our Indian invoice requirements.

Canada: many supplies of services to non-residents are zero-rated for GST/HST, but not all. Check the CRA's rules for your service. See our Canadian invoice requirements.

For how VAT and GST systems differ, see VAT vs GST.

Country-Specific Invoice Requirements

Invoice rules come from the tax law that applies to the supplier, so start with your own country's rules, then check anything the client's country adds (for example, e-invoicing for government clients). Highlights for some common jurisdictions, as summarised on our reviewed country guides:

For more on tax-specific requirements, see our invoice tax compliance guide and tax invoice vs regular invoice.

What to Include on an International Invoice

Beyond standard invoice elements (covered in our how to write an invoice guide), international invoices usually need:

1. The currency clearly stated: use the three-letter ISO code (USD, EUR, GBP, AUD) next to amounts
2. Both parties' full addresses, including country
3. Tax identification numbers where the rules require them: for example both VAT numbers on an EU reverse-charge invoice
4. The tax treatment: the tax amount and rate, or the reason none is charged, such as "Reverse charge" or a zero-rating reference
5. The exchange rate used, where your tax authority requires a converted amount (for example, total VAT in sterling on a UK VAT invoice)
6. Country of origin for goods, for customs
7. Bank details for international transfers: IBAN and SWIFT/BIC, or the account and routing details your bank requires

International Payment Methods

Getting paid across borders means choosing a method your client can use:

Bank Wire (SWIFT Transfer)

The traditional method for international business payments. The client needs your IBAN (or account and routing number for US accounts) and your bank's SWIFT/BIC code.

Pros: widely available, handles large amounts, leaves a clear record. Cons: transfer fees can be charged by the sending, receiving and intermediary banks; transfers can take several business days; banks may add a margin to the exchange rate. Agree who pays which fees.

Online Payment Platforms

Card processors and payment platforms such as Stripe, PayPal and Wise can make cross-border payment easier. Their fees depend on the country, the payment method and whether currency conversion is involved, and they change over time, so check each provider's current pricing page for your country before you choose.

Payment Links on Invoices

Clear payment instructions reduce friction on international invoices. State the bank, transfer service or processor details, and who pays any conversion or transfer fees. On InvoiceQuickly's Pro plan you can connect your own Stripe or PayPal account and add a payment link for the invoice's remaining balance; the client pays on Stripe's or PayPal's hosted page in the invoice currency, and the money goes to your account. InvoiceQuickly does not convert currencies or hold funds.

Letters of Credit

For large international sales of goods, especially with new trading partners, a letter of credit from the buyer's bank promises payment when specified documents are presented. They are common in trade in goods and rarely used for services.

Managing International Invoicing Compliance

Keep Records of Everything

Tax authorities may examine your international transactions. Keep:

• Copies of all invoices issued and received
• Proof of the client's business status (VAT number checks, with the date)
• Exchange rates used and their source
• Payment confirmations showing amounts received
• Contracts specifying the agreed currency and payment terms

VAT Registration in Foreign Countries

You may need to register for VAT or GST in another country if you, for example:

• Hold goods in that country (such as stock in a fulfilment warehouse)
• Sell digital services to consumers there above any threshold that applies to you
• Have a fixed establishment (office, warehouse, staff) there
• Are otherwise required to register under local rules

E-Invoicing Mandates

A growing number of countries require structured electronic invoices for some or all transactions, often through a government platform. Examples:

• Italy: invoices between parties established in Italy go through the SdI
• India: businesses above the turnover threshold must register B2B invoices on the Invoice Registration Portal
• France: e-invoice reception since 1 September 2026; issuing phased in through 1 September 2027
• Saudi Arabia: ZATCA's e-invoicing (Fatoora) rules apply to resident VAT-registered businesses, in phases (ZATCA)
• Mexico: invoices must be CFDI electronic invoices validated through SAT's system. See Mexican invoice requirements

If you invoice in these countries, or hold a tax registration there, check whether their e-invoicing system applies to you. InvoiceQuickly produces PDF invoices only and does not support e-invoicing formats or government platforms such as SdI, CFDI or the Indian IRP.

Common International Invoicing Mistakes

Charging VAT when you shouldn't. If the reverse charge applies, do not add VAT. Charging it anyway means issuing a credit note and a corrected invoice.

Not verifying the client's VAT number. Before applying the EU reverse charge, check the number in VIES or the relevant national database. If the client is not a registered business, you may have to charge VAT yourself.

Forgetting to state the tax treatment. EU rules require the mention "Reverse charge" on reverse-charge invoices. More generally, say why no tax is charged rather than leaving the tax line blank.

Ignoring exchange rate documentation. Record the exchange rate used and its source (central bank, HMRC, payment provider) for every foreign currency invoice.

Using an ambiguous currency symbol. Use ISO 4217 codes: USD rather than $, which could also mean CAD, AUD or SGD.

Leaving out bank details. Missing SWIFT/BIC or IBAN details force the client to ask, which delays payment.

Tools for International Invoicing

Create invoices in seven currencies: in InvoiceQuickly you can invoice in USD, EUR, GBP, CAD, AUD, INR or PKR and add one tax rate per invoice; tax is calculated on the discounted subtotal. Know the limits for international work: the PDF is in English with US-style number and date formats, it labels tax generically as "Tax (x%)", and it copies saved business and client tax IDs to new invoice PDFs or add reverse-charge wording. Put VAT numbers, a "Reverse charge" note and any sterling VAT total in the invoice notes or terms, and check local requirements before sending.

Browse country templates: our template library includes reference layouts for many countries. Use them alongside the country guides above, and check the official rules yourself; a template does not make an invoice compliant.

Calculate interest on late payments: our late fee calculator computes simple interest from an amount, the annual rate you enter and the number of days late. It does not look up statutory rates, so check the rate that applies in the governing jurisdiction (see the late payment guide).

Check conversions: our currency converter is a quick reference; for tax, use the rate your tax authority accepts.

Start Invoicing Internationally with Confidence

International invoicing is manageable once the currency, tax treatment and required details are settled. After that, standard invoicing practice applies.

Create your next international invoice with InvoiceQuickly: type or say what you did and it drafts the client, line items, rates and terms into an editable invoice that you review before saving. The Free plan includes 5 invoices with no card required. Start free.