Retail & commerce · Greece · Tax compliance

myDATA — the e-invoicing & e-books fines regime Greek SMEs can't keep clean of.

For the Greek περιπτεριούχος issuing receipts on a tablet, the παντοπωλείο in Chania still pencilling out monthly VAT, the λογιστικό γραφείο running fifty client books across two tax-office portals — myDATA has moved from a voluntary onboarding ramp into a live-fine regime that hits operators on multiple fronts at once. From 2 March 2026 mandatory e-invoicing covers every business with 2023 revenue above €1m — the AADE identifies roughly 38,000 in scope — and around that core sits a stack of myDATA transmission penalties (10% per non-transmitted invoice, €100 per missed digital movement document, €250–€500 per payroll infringement) that applies to every Greek business regardless of size, against a platform whose stability and Friday-afternoon correction guidelines operators publicly call "impossible to understand."

01The pain

The AADE's official myDATA portal sets out the regime in plain terms. "myDATA" — the Independent Authority for Public Revenue's electronic books and electronic invoicing platform — receives a "synopsis and characterisation" of every income and expense document a Greek business issues, and it does so through one of two channels: the certified electronic-invoicing providers (πάροχοι ηλεκτρονικής τιμολόγησης) who push records in real time at the provider's responsibility, or the AADE's own free "timologio" / "myDATAapp" tools the regulator built for the smallest issuers. The same portal records the regime's split into "Books of AADE" on one side and "e-Invoicing" on the other — two obligations layered on top of every Greek operator who issues an invoice, a delivery note or a payroll record.⁴

The athens-times write-up of the 2 March 2026 trigger date pins down the cliff that has just landed on the largest cohort of in-scope operators. From that date, every business whose 2023 revenue cleared €1m — roughly 38,000 firms by AADE's own count — must issue every B2B and B2G invoice electronically through a certified provider or a state-recognised e-invoicing path; the trade-press write-up records that failure is treated legally as "non-issuance", with the consequences operators feel directly on cashflow: 50% of the related VAT on each missed invoice, €500–€1,000 per audit on non-VAT transactions, and — the line that scares the buyer-side — loss of the recipient's input-VAT deduction, which turns "did the supplier file correctly" into a buyer's compliance question. Around that core, the same write-up records the myDATA transmission penalty stack that applies to every Greek business regardless of size: 10% of the net value per non-transmitted invoice (capped €250/day and €100,000/year), €250–€500 per payroll or settlement infringement, €100 per missed digital movement document (ψηφιακό δελτίο αποστολής), late transmissions at 50% of those rates, and a repeat-offence multiplier that doubles within 5 years and quadruples thereafter.¹

A regime operators describe by the day-to-day shape of its fines: 50% of related VAT for non-issuance plus loss of the buyer's input-VAT deduction; 10% per non-transmitted invoice (capped €250/day, €100,000/year); €250–€500 per payroll/settlement infringement; €100 per missed digital movement document; late transmissions at 50% of those rates; repeat-offence ×2 within 5 yrs / ×4 thereafter; and a 2026 state budget that books €1.3bn of AADE penalty revenue as a forward line item.^1,3

The fiscal-requirements industry brief catalogues the operational pain that sits underneath the headline numbers. It records the December 2024 eSend↔myDATA integration push the regulator rolled out without prior notice, and the immediate downstream consequence for double-entry firms: "errors in transfer values and document classifications" that made VAT filings — already the most time-pressured monthly task an accounting office runs — produce mismatches that had to be reconciled line by line before any client return could be filed. It records the correction guidelines published Friday afternoon during the year-end crunch as "impossible to understand by obligated businesses". It records the second-phase rollout of the digital delivery note (ψηφιακό δελτίο αποστολής) launching with unresolved handling for connection loss or QR-scan failure — the everyday operational reality of a delivery van moving through a Greek mountain road where 4G drops and the driver still needs a legally compliant document on hand. And it records the smaller, sharper fines — €250–€500 imposed on environmental-fee mis-attribution worth €3 of underlying value — that turn a clerical error into a penalty several orders of magnitude larger than the value at stake.³

The Chania local-press write-up of the regional accountants' association meeting captures the human side that does not show up in the regulator's own bulletins. Λογιστές χανίων — the practitioners who sit between the platform and the operator — formally demanded intervention from the central tax administration, telling regulators in their own words that the platform's behaviour during the December 2024 push and through the year-end correction window made compliant filing impossible for double-entry clients. The lawspot legal-news brief records, separately, that a preliminary reference has been put to the Council of State (Συμβούλιο της Επικρατείας) challenging the proportionality of the fines themselves — a case operators will not benefit from for years, but one that confirms the live-fine regime is being litigated in public. Sitting on top of all of it: a 2026 state budget that books €1.3bn of AADE penalty revenue as a forward line item, telegraphing — to every operator who reads the trade press — that enforcement is not a side-effect of the regime but its policy intent. For the παντοπώλης issuing twenty invoices a month, the cleaner running a one-van μεταφορική, the σερβιτόρα clearing tables in a taverna whose owner is now paying €60/month for a certified e-invoicing provider on top of the existing accounting-software bill, the regime stops being a compliance ramp and becomes a continuous, stackable, multi-channel exposure they cannot insure against.^2,3

For the παντοπώλης issuing twenty invoices a month, the cleaner running a one-van μεταφορική — the regime stops being a compliance ramp and becomes a continuous, stackable, multi-channel exposure they cannot insure against. — Greece · Retail forum threads

02Who solves this today

Greek-market vendors that publicly self-market to the myDATA / AADE / ηλεκτρονική τιμολόγηση niche on their own homepage — certified electronic-invoicing providers (πάροχοι ηλεκτρονικής τιμολόγησης) whose front page names the AADE regime as their core operator promise, and SME-pitched invoicing tools whose headline is real-time transmission to myDATA. Each entry verified live and self-marketed in the niche on the date of writing. The free AADE timologio / myDATAapp is the regulator's own tool and is cited in section 01 as part of the regime, not as a third-party vendor. The list is intentionally narrow.

e-timologiera

Greek certified electronic-invoicing provider whose homepage names the regime in plain terms — "Electronic Invoicing Provider for B2B, B2G & B2C in Greece" as the lead, "certified electronic invoicing provider by the Greek Tax Authority (AADE)" as the regulatory framing, "offering complete and reliable solutions for transmitting invoices and accounting documents to myDATA" as the operator promise, and "Fully Compliant with B2G & myDATA" as the explicit positioning statement. The route a Greek operator takes when they want a certified πάροχος that handles the AADE transmission as the vendor's own problem.

etimologiera.gr

ILYDA

Athens-based software house whose Meg myData platform is pitched as a "πιστοποιημένου παρόχου ηλεκτρονικής τιμολόγησης (Υ.ΠΑ.Η.Ε.Σ.)" with explicit "διασύνδεση με την υπηρεσία myDATA" and "αμφίδρομης επικοινωνίας με την ΑΑΔΕ" as the operator promise — a cloud service the vendor markets as eliminating the obligation to use a fiscal mechanism or a cash register, with delivery of certified electronic documents direct to the AADE's electronic books. The route a mid-sized Greek SME takes when they want a Greek-built, AADE-certified invoicing surface that already absorbs the e-books obligation.

ilyda.com

Timologic

Greek online invoicing platform pitched directly at the smallest issuer — "Έκδοση τιμολογίων με απευθείας σύνδεση με την πλατφόρμα myDATA της Α.Α.Δ.Ε." as the front-page lead, "Online Πρόγραμμα ηλεκτρονικής τιμολόγησης MyData" as the operator promise, and "Διασύνδεση Timologic & ηλεκτρονικών βιβλίων myDATA της ΑΑΔΕ" as the explicit readiness statement. The route an αυτοαπασχολούμενος, a small λογιστικό γραφείο or an SME takes when they want a low-overhead invoicing tool that issues into myDATA in real time and returns the M.A.R.K. registration number per document.

timologic.gr

Listed providers publicly market to the Greek myDATA / AADE / ηλεκτρονική τιμολόγηση niche on their own homepages. Inclusion is not endorsement. Adjacent Greek-market vendors were considered and excluded where their public homepage was unreachable for verification at the date of writing — Epsilon Smart's marketing portal returned a 403 to our verifier and was therefore dropped per the two-or-three-verified-beats-a-longer-list precedent. Workadu and Cloudo Cloud are visible in the Greek e-invoicing market and may be considered in a future revision; the three above were chosen as the strongest first cohort on the strength of their front-page positioning. The official AADE portal (aade.gr/mydata) is cited above in section 01 as the source of the regulatory regime and the publisher of the free timologio / myDATAapp tools, not as a third-party solution provider.

Listed companies — manage your entry. If you are one of the providers above and anything here is wrong, missing, or out of date — or you'd rather not be listed — let us know. Removal is processed within 24 hours; corrections within 7 business days. We do not contact listed companies first; we publish what your own public marketing claims and respond when you reach out. Email contact@aikraft.com.