An e-invoice is not a PDF attached to an email. It is a data file in a European standard format (EN 16931), sent through the Peppol network straight from one accounting system into another, with the key details reported to Revenue at the same time. PDFs and scanned invoices will not count once a business is in scope.
The timeline
| 1 Nov 2028 | Large corporates (businesses whose tax affairs Revenue's Large Corporates Division manages) must send e-invoices for domestic business-to-business sales and report them in real time. From the same date every business must be able to receive e-invoices. |
|---|---|
| Nov 2029 | The obligation extends to all VAT-registered businesses that trade with businesses in other EU countries. |
| 1 Jul 2030 | EU-wide (ViDA): e-invoicing and digital reporting for sales between businesses in different EU countries, with invoices due within 10 days of the sale. |
Sources: Revenue, implementation of e-invoicing (8 Oct 2025); Revenue press release (10 Feb 2026). Revenue has not yet published the full technical specifications, and it is still exploring a free option for small businesses to receive e-invoices. This page is reviewed every six months.
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