Retainer Invoice Template for Ireland

A retainer invoice is a specialized billing document that allows you to charge clients for pre-agreed services on a recurring basis. Under Irish law, this document must comply with strict VAT and commercial transaction regulations while providing clear documentation of your ongoing service arrangements. The invoice serves as both a payment request and a legal record of your retainer agreement.

When do you need this document?

You need a retainer invoice when billing clients for ongoing professional services under a retainer agreement. This applies to law firms charging monthly legal fees, consultants providing regular advisory services, marketing agencies on monthly contracts, or any service provider with recurring client relationships. The invoice is typically issued monthly or quarterly, depending on your retainer terms. You'll also need this document when transitioning from project-based to retainer billing, as it establishes clear payment expectations and service boundaries.

Key legal considerations

Your retainer invoice must include specific elements to be legally compliant and enforceable. The invoice header must contain your company details, VAT registration number, and unique invoice number for tracking purposes. Client information should include their full legal name, address, and VAT number if applicable. Clearly describe the retainer period and services covered to avoid disputes about scope of work. Payment terms must specify due dates, accepted payment methods, and any late payment penalties. Include a VAT breakdown showing calculations and total amounts due. Consider adding terms about unused retainer credits and how they're handled at contract end.

Legal requirements in Ireland

Under the Value Added Tax Consolidation Act 2010, your retainer invoice must display the correct VAT rate (currently 23% for most professional services) and your VAT registration number. The invoice must be issued within 15 days of service provision and retained for at least six years for Revenue audits. The Late Payment in Commercial Transactions Regulations 2012 allows you to charge statutory interest on overdue invoices after 30 days, which should be clearly stated in your payment terms. The Companies Act 2014 requires proper record-keeping of all invoices for annual filing obligations. If you're providing services to consumers rather than businesses, the European Union Consumer Rights Regulations 2013 may apply, requiring additional disclosures about cancellation rights and service terms. Electronic invoices are legally valid under the Electronic Commerce Act 2000, provided both parties agree to digital delivery.