Invoicing an Irish Company from the UK: The Complete Guide

You have done the work and agreed the price — but will your invoice make it straightforward for a customer in Ireland to pay you?

Invoicing a business in Ireland can involve a few more moving parts than a domestic invoice. The right VAT treatment depends on what you're supplying, whether it's goods or services, where the customer belongs and whether it's VAT registered. Currency and payment instructions matter too.

This guide walks through the invoice details to check, the VAT questions to resolve before you send it, and a simple template you can adapt. It's a practical starting point, not tax advice: speak to an accountant or tax adviser where the treatment is unclear.

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Invoicing an Irish company from the UK: the quick answer

Before you issue the invoice, work through these points:

What currency does Ireland use?

Ireland uses the euro (EUR). Invoicing an Irish customer in EUR can make the amount due clearer for a customer that budgets and pays in euro, while invoicing in GBP can also work where both parties agree.

The currency choice doesn't decide the VAT treatment. If the invoice is a VAT invoice in a foreign currency, Irish Tax and Customs requires the corresponding figures to be shown in EUR and sets out the exchange-rate approach to use.¹

What information should an invoice to an Irish company include?

According to Irish Tax and Customs’ VAT-invoice guidance, a VAT invoice normally needs details including the date of issue, a unique sequential number, the supplier and customer details, a description of the goods or services, the date of supply where different, VAT information and the total amount due.¹

For a UK business, the practical checklist is:

• Your business name and address.
• Your company number and UK VAT number, where applicable.
• The customer’s legal business name and address.
• The customer’s VAT number, where relevant to the treatment you're applying.
• A unique invoice number, invoice date and tax point or supply date.
• A clear description of the goods or services, plus quantity, hours or units where relevant.
• The net amount, VAT treatment, VAT amount and total due.
• The agreed currency, payment deadline and late-payment terms.
• Payment details and a reference the customer should use.
• Any required wording, such as reverse-charge wording, once you have confirmed it applies.

Do you add VAT when invoicing a business in Ireland?

There isn't one answer for every UK-to-Ireland invoice. Start with whether you're selling goods or services, then check the customer type, the customer’s location, the place of supply and the evidence you hold.

VAT on goods exported from the UK to Ireland

If goods physically leave the UK, VAT Notice 703 explains the conditions and record-keeping required to zero-rate an export.² The evidence needs to show that the goods supplied left the UK; HMRC notes that transport documents alone may not be enough.

Keep the records that support the specific transaction, such as the sales invoice, the customer order, delivery details and appropriate export or transport evidence. If you don't obtain the required evidence within the relevant time limit, HMRC explains that you may need to account for VAT.²

VAT on services supplied to Irish businesses

For many business-to-business services, HMRC’s general rule is that the supply is made where the customer belongs.³ That doesn't remove the need to check the type of service: land-related, event, transport, digital and other services can have different rules.

If you're considering reverse-charge wording, make sure it matches the actual supply and customer facts. A tax adviser can confirm the wording before you issue the invoice.

Sample invoice template: UK business invoicing an Irish company

Use this as a starting point and adapt it to the transaction and confirmed VAT treatment.

If your invoice is in GBP but Irish VAT-invoice rules require EUR figures to be shown, include the EUR equivalent and the relevant conversion basis.¹

Is e-invoicing mandatory in Ireland?

E-invoicing is already relevant in some contexts, including public procurement. Looking ahead, Revenue’s VAT-modernisation paper describes the planned rollout of e-invoicing and real-time reporting in Ireland, including the EU cross-border requirement from 1 July 2030.⁴

For now, ask the customer whether it needs a particular format or structured e-invoice. A PDF may be workable for a commercial relationship, but the customer’s procurement process may require something more specific.

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FAQs

What currency should I use when invoicing an Irish company?

EUR is often the simplest currency for a customer in Ireland, but GBP can work if both parties agree. Check the currency treatment and, for a VAT invoice in a foreign currency, Irish Tax and Customs’ requirement to show corresponding EUR figures.¹

Do UK businesses charge VAT to Irish companies?

It depends on what you're selling and the facts of the transaction. Goods exported from the UK require the conditions and evidence in VAT Notice 703 to be considered, while services require a place-of-supply assessment.^2,3

What reverse-charge wording should I use?

Use wording only after confirming that the reverse charge applies to your particular supply. The service type, customer status and place-of-supply analysis all matter, so an accountant or tax adviser can confirm the wording for your invoice.

Do invoices to Ireland need to show EUR values?

According to Revenue, a VAT invoice issued in a foreign currency must also show the corresponding figures in EUR.¹

Sources:

Sources last checked on 21st July 2026