Today is the last day for businesses and self-employed people to check and, if necessary, correct their new Activity Codes (KAD) in the Tax Register of the Independent Authority for Public Revenue (AADE) without incurring a fine. The register was updated automatically last March as part of the process of matching the old KAD codes (2008 edition) with the new European classification framework (2025/2026 edition).
The check is considered necessary because the automatic process does not necessarily mean that every business now has the correct entries.
The matching process revealed significant problems, including businesses being assigned unrelated KAD codes, the loss of secondary activities that were needed, and duplicate entries or ambiguities that affect participation in NSRF programmes and access to financing.
In some cases, an old code may correspond to more than one new code, while in others the new description may not fully cover the actual activity.
The Economic Chamber of Greece (OEE) has formally asked the Ministry of National Economy and Finance and AADE to extend the deadline for correcting KAD codes to 31 December 2026.
The OEE says businesses and accountants-tax advisers need sufficient time to check and correct any errors resulting from the automatic matching of old KAD codes with the new ones.
The review
Whether or not an extension is granted, those concerned should be familiar with the key steps in the review process. The first step is to log in to the myAADE platform and select “Register & Communication > Register Certificates > Current Entity/Business Details”. Businesses can see there which KAD codes were entered after the automatic matching process.
The review should be comprehensive and include:
- The primary KAD code, to confirm that it corresponds to the business’s main activity.
- All secondary KAD codes, to check whether they cover the other activities actually carried out.
- The KAD codes for the registered office and each branch, since activities may differ from one location to another.
- Whether the descriptions are correct, as well as whether there are codes that are no longer needed or activities that have not been registered.
Taxpayers can also look for relevant updates in the “My Messages” section of myAADE and in the email account they have registered with AADE.
Reporting errors
If an incorrect match, a missing activity or a KAD code for an activity that is no longer carried out is identified, those concerned should submit the appropriate correction, change or cessation declaration through the “Change Register Details” section of myAADE.
Today’s deadline (30 October 2026) applies to the relevant corrections without a fine arising from the automatic matching process, provided no change to the KAD codes for the registered office or a branch has been made since 1 March 2026.
Where automatic matching is not possible, a request can also be submitted through the “My Requests” service, using form D211 and any required supporting documents. The process depends on the type of request and whether it concerns the registered office or a branch.
Particular care is needed to distinguish between an error resulting from automatic matching and a new change in business activity. The usual procedures and deadlines for reporting genuine new changes remain in force.
The tables
To help businesses select the correct code, AADE provides official tables matching KAD 2008 codes with KAD 2025 codes, an alternative presentation of the tables and explanatory notes. A certificate matching old KAD codes with the new ones is also available through the myBusinessSupport platform.
The consequences
If a business leaves incorrect or incomplete KAD codes on its records and the deadline passes, the consequences are not only financial (a €100 late-filing fine) but also operational (exclusion from NSRF programmes and subsidies, problems with myDATA and invoicing, tax audits and tax presumptions).