How Can a Small Business Start E-Invoicing in Estonia?

A small business in Estonia can start e-invoicing in four steps: choose a sending-and-receiving channel, make the recipient entry in the e-Business Register, check your partners’ readiness, and send the first e-invoice. In most cases you do not need new software: Estonian invoicing and accounting programs typically issue e-invoices either directly or through an operator (an e-invoicing service provider), and for the smallest volumes the state-run e-arveldaja is free for the first year. An e-invoice here means a machine-readable XML invoice compliant with the European standard EN 16931 – Estonia’s primary format since 1 July 2025.

1. Choose a channel that fits your volume

There are three options. The state e-arveldaja suits very low volumes: free for the first year, then per the official price list €5 per year for low transaction counts or from €5 per month for larger ones, VAT added; invoicing only public-sector buyers carries no monthly fee at all. A private operator suits businesses already using accounting software – the operator integrates with it and invoices flow automatically. The third path is your software’s built-in e-invoicing support, which may not require a separate operator contract. The criteria that matter (integrations, pricing model, Peppol support) are covered in our operator selection guide.

2. Make the register entry

To receive e-invoices, a person with representation rights confirms your channel in the e-Business Register on the “E-invoice services” page. Without the entry, e-invoices sent to you have nowhere to go. The sender’s software cannot find your channel. The exact procedure is in our guide to registering as an e-invoice recipient. The entry also strengthens your hand: since 1 July 2025 a registered recipient may demand e-invoices from suppliers.

3. Check your partners’ readiness

Before the first invoice, search the Business Register: a customer registered as a recipient shows an e-invoice handler in its public data. If your customer is a public-sector body, the answer is always yes – the Estonian public sector has accepted only e-invoices since 2019.

4. Send the first e-invoice and review the result

Pick a regular customer for the first e-invoice so you can confirm the outcome together: did it arrive, did the lines and totals come through correctly. An operator’s portal shows the invoice’s journey; in e-arveldaja the status is visible in the same view. From then on the process is what it always was – minus the PDFs and the manual data entry.