Do I need Peppoli to send an invoice to a government agency?

No. Peppol is not a legal requirement in Estonia. The requirement is a machine-readable e-invoice. From 1 July 2025, it will be valid Accounting Act § 7¹ subsection 7, according to which any accounting entity that has registered itself as an e-invoice recipient in the e-business register may request an e-invoice; an invoice that complies with EN 16931-1 is deemed to comply with the requirements and the parties may also agree on another suitable standard. According to the explanation of the Ministry of Finance, all public sector entities already registered as e-invoice recipients, so a machine-readable e-invoice must be submitted to a state agency, municipality or public entity by default. Peppol is one network through which this file can be transferred – not the only one or mandatory. It is not necessary to become a member of OpenPeppol. And in E-invoice, commercial and non-profit organizations can send e-invoices to public sector agencies for free.

What exactly is Peppol: a format, a network, a portal or an operator?

The confusion begins with the fact that the word „Peppol“ colloquially means at least three things. OpenPeppol itself puts it quite bluntly: Peppol is not a portal or exchange service provider.. It is a network, a set of document specifications and a management model that each organization uses through an accredited service provider (Peppol-accredited Service Provider) of its choice.

The network itself works on a 4-corner model. The older 3-corner model assumed that the sender and receiver used the same service provider. This meant that the larger customer dictated who you sent your invoices through. With Peppolis, both the buyer and the seller only need one service provider, even across borders.

One thing is important for you here: the law requires format and machine readability, not a specific network. Estonian law does not say anywhere "send via Peppol". Peppol is a technical path chosen by your software or service provider.

Does a PDF attached to an email count as an e-invoice?

No. According to the definition of the Ministry of Finance, an e-invoice is an invoice originally prepared digitally, as a machine-readable file based on a common standard, the data of which moves from the seller's software to the buyer's so that the buyer no longer has to enter them manually. An e-invoice is not just an image of an invoice. A PDF invoice is an image.

In practice, a PDF often accompanies an e-invoice, because the original document must also remain understandable to a human. This companion does not replace a structured file. If you only send a PDF to a public sector buyer, you have not met the requirement. You have hoped that the buyer will make an exception.

What changed on July 1, 2025, and why doesn't it make much difference in the public sector?

Estonia's general e-invoice obligation for public sector buyers was introduced in 2019. In 2025, this obligation was replaced by the buyer's right to choose in which form they want to receive the invoice, and the same "buyer chooses" principle was extended to the private sector: anyone who has publicly registered as an e-invoice recipient in the e-business register can request an e-invoice. According to the Ministry of Finance, Approximately 18,000 companies in Estonia have registered as e-invoice recipients and their number is on the rise.

There is also another side to the law that is worth knowing. Section 7¹, subsection 3 of the Accounting Act allows an accounting entity to notify the commercial register that it wishes to receive only machine-processable invoices. Its contractual e-invoice handler can also do the same for it. There is no limit: no euro threshold, no turnover limit, no VAT liability requirement. Only the buyer's registration is decisive.

For the public sector, the previous regime essentially continued, as all entities are registered. However, there is one real difference: unlike before, a public sector institution is no longer prohibited from making an exception to the rule and accepting invoices in other formats. Read this carefully. This is the buyer's right to make an exception, not your right to send a PDF by email.

Which format to choose: Estonian standard, EN 16931 or Peppol BIS Billing?

There are mainly two e-invoice file formats in use in Estonia: the Estonian e-invoice standard and the European e-invoice standard, also called the Peppol invoice here. The Estonian standard is earlier and more widespread in the local market; the European standard is later, but is increasingly widely used in the European Union and is recommended by the Ministry of Finance. The principle of format freedom applies: the use of both is permitted.

In terms of law, the safest choice is the European standard, because an invoice in accordance with EN 16931-1 is deemed to comply with the requirements according to § 7¹ paragraph 7 without separate verification. Peppol BIS Billing is a profile of this standard used in the Peppol network, i.e. the same content formatted according to agreed rules.

The same logic applies at the European level. Article 7 of Directive 2014/55/EU obliges Member States to ensure that public contracting authorities are able to accept and process invoices that comply with the European e-invoice standard. The directive does not mention a mandatory network. Peppoli is not included in this text.

How to send a proper e-invoice to the public sector without purchasing Peppoli access?

• Check buyer status: Check the e-business register to see if the buyer is registered as an e-invoice recipient. According to the Ministry of Finance, the answer is yes for the public sector, but it is worth checking for private sector customers.
• Ask the buyer about the channel and format: There is no confirmed source that every Estonian public sector entity has a Peppol endpoint. So don't assume the channel, just ask. One email to accounting saves two weeks of billing delay.
• Choose shipping method: E-biller is a web-based accounting software located in the e-Business Register portal. It allows all commercial and non-profit organizations to send e-invoices to public sector institutions free of charge, in unlimited quantities and without a deadline. For small invoice volumes, this is the cheapest solution, because a separate operator contract is not required. An alternative is your business software's own e-invoice channel or one of the e-invoice operators listed by the Ministry of Finance (E-arveldaja, Telema, Billberry, Unifiedpost, Finbite).
• Attach a PDF for someone to read: A structured file is for the machine, a PDF is for the processor. Both together are common practice.
• Foreign supplier: They can conclude an e-invoice contract members of the management board of a public limited company, a private limited company, a commercial association, a limited partnership, a general partnership, a non-profit association, a foundation and a European company, and sole proprietors. If your business form does not fit into this list, the invoice will be sent through your own service provider. Here Peppol is the natural choice, because one accredited service provider is sufficient even across borders.

The law does not require you to have a separate Peppoli membership, access point, or expensive operator contract. If someone says that you have to buy "Peppoli access" to send an invoice to the state, ask what provision they are relying on.

Will the 2027 and 2030 amendments make Peppoli mandatory?

No, these are different topics that are often confused. According to the Tax and Customs Board, the VAT return submission to be data-based in 2027: the entrepreneur will no longer submit a report, but transaction data, the file format will be XBRL GL-based XML and the previous XML will no longer be valid. Testing in the MTA training environment will be opened to business software providers on 01.01.2027, file upload in the user interface can be tested from March 2027. This concerns tax reporting, not the invoice sending channel.

The MTA adds that the adoption of data-driven reporting will help prepare for the change to the European Union VAT system that will come into effect on 1 July 2030, which will entail mandatory e-invoices and near-real-time data submission. This also doesn't say "Peppol", but "machine-readable e-invoices and faster data exchange".

In practice, it all comes down to one question: does your invoice reach the buyer's system in a machine-readable format and in a format that they accept. If the answer is yes, it doesn't matter whether the file was transferred via the Peppoli network, via an operator, or from an E-invoicer. If the answer is no, even the most expensive access won't help.

Read also: English

Last checked: September 21, 2026

FAQ

Is Peppol mandatory to send an invoice to an Estonian government agency?

No, Peppol is not legally mandatory in Estonia. The Accounting Act requires a machine-readable e-invoice that complies with the Estonian standard or the European standard EN 16931-1. Peppol is only a transmission network, not the only or mandatory channel.

Does the PDF file sent by email meet the requirements for an e-invoice?

No, a regular PDF invoice is not an e-invoice in the sense of the law, but a digital image. An e-invoice must initially be a structured machine-processable file, the data of which is transferred directly to the buyer's business software. A PDF can only be transferred as a visual supplement to a structured file.

How can I send an e-invoice to the public sector for free?

Estonian companies and non-profit organizations can send e-invoices to state institutions for free through the national E-invoice environment. To use this solution, it is not necessary to sign a contract with a paid e-invoice operator or purchase separate Peppol access.