How to Invoice International Clients: Currency and Tax

International invoices are routine until they aren't: then you discover withholding tax, reverse charge VAT or a national e-invoicing system you didn't plan for. The fix is to research each country before the first invoice and build what you learn into your terms and templates.

Start with our international invoicing guide and invoice tax compliance guide, and see invoicing in a foreign currency for exchange rates. The OECD's International VAT/GST Guidelines explain why cross-border business services are usually taxed in the customer's country; your invoice wording should follow the rules of the countries involved and your adviser's advice.

Currency and bank details

Invoice in the contract currency and show the currency code. Give bank details clearly (for example IBAN and BIC/SWIFT for international transfers) and state who pays transfer fees. If you quote an equivalent in another currency, name the rate source; our currency converter uses a dated snapshot of rates, so enter your own current rate.

Tax identification

Collect the client's legal name, address and tax ID before you invoice, and show your own tax ID where the rules require it. State plainly whether tax is charged, zero-rated or not charged because the customer accounts for it (reverse charge), using the wording the relevant country requires. EU businesses can check a customer's EU VAT number on VIES.

Withholding tax

Some countries require the client to withhold tax from payments to foreign suppliers and pay it to their tax authority. Your contract may then need to say whether fees are quoted gross or net of withholding, and your invoice may need to show the gross fee, the withholding and the net amount payable. Ask the client early and confirm with an adviser in that country, because withholding reduces the cash you receive.

Invoices vs statutory e-invoicing

In some countries a PDF is not a valid invoice for domestic transactions. Examples from our reviewed country guides:

• Italy: if you hold an Italian VAT number and invoice a customer in Italy, the invoice must be an XML e-invoice sent through the Sistema di Interscambio (SdI) (Italy guide).
• Mexico: an invoice is a CFDI, an XML file certified by an authorised provider or the SAT (Mexico guide).
• India: businesses whose turnover has exceeded ₹5 crore in any financial year since 2017-18 must register B2B invoices on the Invoice Registration Portal (India guide).
• Singapore: IRAS is phasing in a requirement to send invoice data through InvoiceNow, starting with some new GST registrants from 1 November 2025 (Singapore guide).

These rules mostly apply to suppliers registered in those countries. If you are a foreign supplier, ask whether your client also needs a document in a local format or a submission to a procurement portal.

Payment methods abroad

Cards, PayPal and bank transfers differ in fees, speed and refund rules: see invoice payment methods. For larger business payments, bank transfers are common.

Contracts and terms

Write payment terms that cover late payment (late payment guide), interest, where the law allows it (overdue invoice interest), and how disputes are raised (handling disputed invoices). Say which country's law governs the contract.

Recordkeeping

Keep exchange rates, tax evidence (such as the customer's VAT number check) and any portal confirmations in your audit trail, and back up your records (backup strategy).

Operational due diligence

Before the first invoice, confirm who deals with any withholding and whether you can reclaim it, for example as a credit in your own country. Keep a one-page note per country with the invoice wording, tax treatment and usual payment method, and link it to the official sources. If you ship goods or software, check sanctions and export rules as well as tax. Review each note at least yearly, because e-invoicing rules change often.

Closing checklist

• Register with any e-invoicing system you are required to use before your first deadline.
• Translate what the law requires; keep the rest simple.
• Keep withholding certificates with the related invoices.
• Review your currency policy when exchange rates move sharply.
• Update your invoice template footers after any legal review.
• Log sanctions checks with the date.

Metrics and cadence

Track withholding against what you expected, since surprises hit cash. If you send e-invoices, log rejection reasons by country; patterns point to template fixes. Compare revenue in your home currency quarter by quarter for your main currencies. Note when clients' supplier records need refreshing, because expired records can block payments.

Final takeaway

International billing is research plus discipline. Build a short playbook per country from official sources instead of one-off searches, and when rules and speed conflict, follow the rules: penalties and blocked payments cost more than a day's setup. Revisit the playbook when you start billing a new country or a client adds a local entity.

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Cross-border invoicing essentials

Payment times vary by client and country, so agree terms per contract rather than assuming a standard. If you expect slower international transfers, allow for them in the due date, for example 45 days instead of net 30.

Step-by-step: issuing a cross-border invoice

Step 1: Get the client's tax ID and details up front

Ask for the legal entity name, address and tax number before quoting, for example an EU VAT number (checked on VIES), a UK VAT number, an Australian ABN or an Indian GSTIN. Under the EU and UK rules for most business-to-business services, evidence that your customer is in business is what lets you treat the supply as taxed in their country, so get it before you invoice.

Step 2: Choose your billing currency

Three common patterns: bill in your home currency (simple for you; the client carries the exchange risk), bill in the client's currency (easier for the client; you carry the risk), or bill in a major currency such as USD or EUR. Write the choice into the contract and keep it for the engagement.

Step 3: Work out where the supply is taxed

For UK and EU suppliers, most B2B services are supplied where the customer belongs, and the customer accounts for VAT under the reverse charge (VAT Notice 741A; EU VAT Directive Article 44 and Article 196). Services to consumers, land-related services, events and digital services have special rules. Goods exported from Great Britain can generally be zero-rated with evidence of export (VAT Notice 703). The US has no federal VAT; state sales tax depends on what you sell and where (see the sales tax nexus guide). Getting this wrong can leave you owing the tax yourself.

Step 4: Include the fields each jurisdiction requires

The EU's list is in Article 226 of the VAT Directive (supplier and customer names, addresses and VAT numbers where required, sequential number, dates, description, amounts per rate, and "Reverse charge" where the customer pays the VAT). The UK's list is in VAT Notice 700. For other countries, use our reviewed guides for Australia, Canada, Japan, Singapore, India and others on the regional invoicing page.

Step 5: Send it in a way you can track

Email with a PDF attached is the usual method. On InvoiceQuickly Pro, the invoice is emailed with the PDF attached and delivery events are recorded, and an invoice is marked "viewed" when the client opens it in the client portal. If a client needs an e-invoice or uses a procurement portal, you will need a tool that supports that format.

Common international invoicing scenarios

US freelancer billing a UK business $10,000: bill in USD. Charge no UK VAT if you are not UK VAT-registered; a UK VAT-registered business customer generally accounts for UK VAT on services bought from abroad under the reverse charge (VAT Notice 741A). A note such as "UK customer to account for any UK VAT under the reverse charge" is common. The fee is still income for US tax purposes.

EU consultant billing a US company $50,000: under Article 44 of the EU VAT Directive, B2B services are generally taxed where the customer is established, so no EU VAT is charged to a US business customer. The exact invoice wording is set by your own country: see, for example, the Germany, France or Netherlands guides. Agree the currency and longer payment terms if the client's payables process needs them.

Australian business billing a Singapore client: check both sides. Our Australia guide covers what an Australian tax invoice must show, and the Singapore guide covers the client's side. Confirm the GST treatment of the export with the ATO's guidance or an adviser before you invoice.

Client in a country with currency controls: ask how and when the client can pay in your currency before you sign, and allow extra time in the payment terms, for example net 60.

Doing this in InvoiceQuickly

InvoiceQuickly creates English-language PDF invoices in USD, EUR, GBP, CAD, AUD, INR or PKR, with one tax percentage per invoice, labelled "Tax". It does not convert currencies. New invoice PDFs copy your saved business tax ID and the selected saved client's tax ID, so type them, and any reverse-charge wording, into the invoice notes. It does not produce e-invoice formats such as Peppol, SdI XML or CFDI, so it is not suitable where those are required.

Frequently asked questions

What's reverse charge and when does it apply?

Under the reverse charge, the customer rather than the supplier accounts for the VAT. In the EU and UK it applies to most business-to-business services bought from a supplier in another country, where the service is taxed in the customer's country (EU VAT Directive Articles 44 and 196; VAT Notice 741A). Where EU rules apply, the invoice must say "Reverse charge" and show the customer's VAT number (Article 226). Some countries also use domestic reverse charges for particular sectors.

Do I need to register for VAT or GST in the customer's country?

Often not for B2B services covered by the reverse charge, but it depends on the country and what you sell. Selling to consumers, selling digital services, holding stock or having staff abroad can each create a registration duty. Check the country's tax authority or our country guides before you start.

How do I get paid faster cross-border?

Agree the currency, payment method and who pays fees in the contract, send the invoice promptly to the right contact with the client's reference, and include complete bank details. Offering a card or PayPal link (on InvoiceQuickly Pro, through your own Stripe or PayPal account) gives clients a quicker option; provider fees apply.

What if the client requires a specific invoice format?

Ask for format and portal requirements when you sign the contract. Some public bodies and large companies require structured e-invoices or uploads to their procurement portal. If the client needs a format InvoiceQuickly doesn't produce, use a tool that does.

What should I do about FX risk on long invoices?

Choose one approach and write it into the contract: fix the invoice amount in one currency, allow payment in another currency at a named rate on a named date, or fix a rate for the contract's term. Hedging products only make sense when the amounts justify the cost; see hedging currency risk.

Last reviewed: 28 October 2026. General information, not legal or tax advice. Rules differ by country and change; check the official sources and country guides linked above.