On a limestone desk, an old brass spike holding receipts and, beside it, a glass tube pouring water into a titanium bowl: the old way and the new.

ServicesSystems & applications

From 1 October, every B2B invoice flows electronically.

E-invoicing & myDATA

From 1 October, every B2B invoice flows electronically.

From 1 October 2026, every business in Greece issues its invoices to other businesses, to the public sector and to customers outside the EU only through a certified provider or the free apps of AADE, the Greek tax authority. Businesses with 2023 revenue up to €1 million can keep the old way in parallel until the end of the year, if they file a declaration by 12 October. Retail receipts stay as they are.

Tell us about yours
1 Oct
From 1 October 2026, every business issues its B2B invoices electronically. Those with 2023 revenue above €1 million have done so since 2 March.Decision A.1128/2025, as amended by A.1044/2026
12 Oct
Last day for the declaration that lets you keep the old way of invoicing in parallel until 31 December, if your 2023 revenue was up to €1 million.AADE press release, 22 September 2026
50%
of the VAT, with a minimum of €250 or €500: the fine for an invoice issued outside a provider or timologio. It counts as not issued.Law 5104/2024, article 57, and circular E.2004/2026

Who it covers, and what stays as it was.

The obligation covers every business that issues invoices: companies, sole traders, freelancers. Size exempts no one. The €1 million threshold on 2023 gross revenue only decided who started first, on 2 March 2026.

It covers three kinds of transaction: sales to businesses in Greece, invoices to the public sector, and sales to businesses in countries outside the EU. Sales to businesses in other EU countries and receipts to consumers stay outside it.

Something changes for buyers too: since 2 March 2026, every business must accept the electronic invoices of its Greek suppliers.

  • Sales to businesses in Greece

    An electronic invoice for every sale of goods and every service. The buyer is obliged to accept it.

  • Invoices to the public sector

    Already electronic in public contracts, and since 1 September 2025 for the other expenses of general government bodies too, with exceptions.

  • Sales to businesses outside the EU

    Mandatory for you. If the customer does not accept an electronic invoice, you send it another way.

  • Sales to businesses in the EU

    Optional for now. Directive (EU) 2025/516 brings e-invoicing here too, from 1 July 2030.

  • Receipts to consumers

    No change. They are issued as they are today, as AADE confirmed on 22 September 2026.

  • Invoices you receive

    Since 2 March 2026 you must accept the electronic invoices of your suppliers in Greece.

Bundles of old invoice books tied with twine on a limestone shelf, beside a brass spike of receipts: the way that is ending.

Provider, ERP or timologio: who does what.

Until now, most invoices came out of the business's own software, the ERP, and their data was then sent to myDATA, the tax authority's e-books platform. For B2B invoices this ends. AADE's circular E.2004/2026 says it plainly: an invoice issued by hand or from an ERP, without a provider or timologio, counts as not issued.

An e-invoicing provider is a company whose software is licensed by AADE. It issues the invoice on your behalf, sends it to myDATA at the same moment, delivers it to your customer and keeps it on file. Your ERP or online shop is not replaced: it still prepares the invoice and hands it to the provider.

For a few invoices a month there are AADE's free apps: timologio on the web and myDATAapp on the phone. They are complete, but you fill them in by hand and they do not connect to your software.

  • Your software

    ERP, online shop or booking system. This is where the invoice is born: customer, items, prices, VAT.

  • The certified provider

    Issues and authenticates the invoice, sends it to myDATA in real time, delivers it and archives it.

  • myDATA

    AADE's platform. It gives the invoice a unique registration number, the MARK, which goes into its QR code.

  • timologio and myDATAapp

    AADE's free apps, equivalent to a provider. They suit businesses that write a few invoices by hand.

  • Your customer

    Receives the invoice electronically, with its MARK and QR code, and also finds it in its own myDATA.

  • Your accountant

    Finds every invoice in myDATA from the moment it is issued, instead of waiting for files at the end of the month.

When it applies to you, and the way it will run.

Two questions for your own date. Then follow one invoice from the software that prepares it to the customer, the old way and the new.

Your own date

Do you issue invoices to businesses or to the public sector?
Was your gross revenue in 2023 above €1 million?

Answer both questions to see when it applies to you and what it means.

The route of one invoice

Invoice A 418 from Skyphos to Aridela Suites: 14 Akrotiri vases, €1,076.32 incl. VAT

  1. Your softwareERP, shop or bookings

    The order becomes an invoice: VAT number, items, VAT. The software does not issue it alone; it sends it to the provider.

  2. The providerlicensed by AADE

    Issues the invoice on your behalf, sends it to myDATA at the same moment and keeps it on file.

  3. myDATAAADE

    Records the invoice and returns the MARK. The invoice's QR code confirms it.

  4. The customerAridela Suites, Naxos

    Receives the invoice electronically, with its MARK and QR code, and also finds it in its own myDATA.

Choose a way and issue the invoice.

A Noria study. Illustrative data.

What changes in practice, business by business.

The rule is one, but every business meets it at a different point. The connection to the provider has to be made where the invoice is born; otherwise someone will be retyping invoices by hand.

  • Online shops that also sell to businesses

    When a customer asks for an invoice with a VAT number, the shop has to send it to the provider at the moment of the order. Retail receipts stay as they are.

  • Hotels and rentals

    Invoices to Greek travel agencies and companies, and to tour operators outside the EU: electronic. To agencies in the EU: optional. Guest receipts: as before.

  • Wholesale and producers

    Every invoice to a trade customer goes through the provider. With dozens a day, connecting the ERP is the only sensible way.

  • Freelancers

    Service invoices to businesses follow the same rule. For a few a month, timologio is enough.

  • Suppliers to the public sector

    An electronic invoice to the European standard, through a provider or timologio, delivered to the public body through GSIS, the state's IT secretariat.

  • Purchases from suppliers

    Incoming invoices now arrive electronically. They are worth routing into your accounts without retyping.

The dates, in order.

  1. 2 Mar 2026

    Phase A: businesses with gross revenue above €1 million in 2023. From the same day, every business must accept electronic invoices.

  2. 3 May 2026

    Last day of phase A's transition period.

  3. 1 Oct 2026

    Phase B: all other businesses and freelancers.

  4. 12 Oct 2026

    Deadline for the declaration on myAADE, for those who want a transition period until 31 December.

  5. 1 Jan 2027

    No transition left: B2B invoices are issued only electronically, by everyone.

  6. 1 Jul 2030

    Directive (EU) 2025/516 brings e-invoicing to sales between businesses across the EU.

What to do in the coming days.

In the order that matters. Step four has a deadline: 12 October.

  1. Check which phase you are in: gross revenue in your 2023 tax return above or below €1 million.

  2. List where every invoice comes from today: ERP, online shop, booking system, paper pad, a Word file.

  3. Choose a channel: a certified provider if you invoice from software or in volume, timologio or myDATAapp if you write a few invoices by hand.

  4. If you need time and your 2023 revenue was up to €1 million, file the declaration of start of electronic issuance on myAADE by 12 October.

  5. Connect your ERP, shop or booking system to the provider, so every invoice leaves from where it is born.

  6. Issue test invoices: a simple one, one with a discount, a credit note, one to a customer abroad. Check the MARK, the QR code and that each one reaches the customer.

  7. Tell your accountant, customers and suppliers how you will send and receive invoices from now on.

We connect. The provider issues.

Noria is not an e-invoicing provider and does not issue invoices. We connect the systems you already have, shop, ERP, booking system, CRM, to the certified provider of your choice and to myDATA, so every invoice leaves from where it is born, with no retyping.

  • Invoicing map

    Where each of your documents comes from, what kind it is and which connection it needs. Before anything changes.

  • Shop to provider

    The invoice with a VAT number is issued through the provider at the moment of the order. Retail receipts carry on as before.

  • ERP and CRM connections

    Your software sends each invoice to the provider and gets the MARK and QR code back, with no second entry.

  • Bookings and hotels

    From the booking system to the provider: invoices to agencies and companies, with the right details of every booking.

  • Incoming invoices

    Your suppliers' electronic invoices reach your accounts and your ERP without anyone typing them in.

  • Testing and monitoring

    Test invoices before the switch, and an alert if an issue or a transmission fails.

Start with usPart of Systems & applications

The questions we hear most.

For businesses with gross revenue above €1 million in 2023, from 2 March 2026. For everyone else, freelancers included, from 1 October 2026. Those who file a declaration by 12 October can keep using the old way in parallel until 31 December 2026. From 1 January 2027, B2B invoices are issued only electronically.

No. You can issue invoices from AADE's free apps, timologio and myDATAapp. But you fill them in by hand and they do not connect to your ERP or online shop. If your invoices come out of software, or there are many of them, a provider is the practical way.

Yes, if the ERP is connected to a certified provider and the invoice is issued through it. An invoice issued by the ERP alone, even if it is sent to myDATA, counts as not issued, unless the power or the internet was down (circular E.2004/2026).

No. On 22 September 2026 AADE confirmed that e-invoicing changes nothing for receipts to consumers. If a customer asks for an invoice with a VAT number, however, that invoice is issued electronically.

The declaration of start of electronic issuance, on myAADE, in the myDATA section. You need it only if your 2023 revenue was up to €1 million and you want to keep issuing the old way in parallel until 31 December. If from 1 October you issue only from timologio or myDATAapp, you do not. Using a provider is declared separately, as decision A.1112/2025 sets out.

An invoice not issued in the prescribed way counts as not issued. The fine is 50% of its VAT, with a minimum of €250 for single-entry and €500 for double-entry books, rising to 100% and 200% for repeat offences. For invoices without VAT, €500 or €1,000 per audit (Law 5104/2024, article 57).

To businesses outside the EU the e-invoice is mandatory; if the customer does not accept it, you send it another way. To businesses in the EU it is optional for now. From 1 July 2030, Directive (EU) 2025/516 extends it to trade within the EU.

myDATA is the platform where AADE records the documents businesses issue. E-invoicing changes how the invoice itself is issued: through a provider or an AADE app, which sends it to myDATA at the moment of issue and delivers it electronically to the customer.