What Is an AFM Number and Why Do You Need One in Greece? (2026 Guide)
An AFM number is Greece’s Tax Identification Number. Official AADE material describes it as a unique nine-digit number that serves as your personal reference number in the Greek tax system and identifies you individually before the tax administration. Gov.gr also makes clear that this AFM can be requested electronically by the interested person regardless of tax residence, which means it is not reserved only for people already living in Greece.
In practice, the AFM is one of the first administrative building blocks you need in Greece. It is closely linked to the issuance of an Authentication Key and digital access to AADE services, and it is commonly needed for steps such as buying property, handling property tax obligations, using online tax services, or starting a sole proprietorship. That is exactly why many non-residents prefer to get it sorted properly from the start instead of discovering later that a missing AFM is blocking a bigger project.
At AFM Greece, this is exactly what we help with: obtaining the right Greek AFM through the correct route, with the right documents, and without unnecessary confusion for applicants abroad.
The quick answer below follows the current official gov.gr and AADE framework on AFM issuance, digital access, property obligations, and business setup.
Quick Answer
An AFM number is your Greek Tax Identification Number.
- It is a unique number used by the Greek tax administration to identify you
- It is commonly needed to interact with Greek tax services and digital portals
- You often need it to buy property in Greece
- You generally need it to handle E9/ENFIA property obligations
- You need it to start a sole proprietorship in Greece
- It is tied to your digital tax access through myAADE/TAXISnet
- Non-residents can also obtain one
For most applicants abroad, the easiest option is to use AFM Greece so the AFM is handled correctly from the beginning, without avoidable delays or guesswork.
The comparison below is based on the current official AFM process and the real-world uses that AADE and gov.gr attach to the AFM, especially for online services, property, and business activity.
| Option | Best for | What you handle yourself | Main drawback | Verdict |
|---|---|---|---|---|
| Apply for the AFM yourself | People comfortable with Greek admin steps and document checks | The application, identification, supporting documents, and follow-up | Easy to underestimate how central the AFM is to later steps | Possible, but not always the smoothest route |
| Get the AFM later only when you suddenly need it | People who think they can postpone the issue | Nothing at first — then everything under time pressure | This is often when property, business, or digital admin becomes stressful | Least strategic option |
| Use AFM Greece | Non-residents who want clarity and the right setup from the start | Usually just providing the requested details and documents | Paid service | Best overall option for most applicants abroad |
If you want to avoid confusion, missing documents, and unnecessary delays, AFM Greece can guide you through the process from start to finish. We help non-residents understand exactly what is needed for their AFM application, so you can move forward with more clarity and less stress.
What is an AFM number?
An AFM is your Greek Tax Identification Number. Official AADE material describes it as a unique nine-digit number issued by the Tax Administration that identifies each taxpayer individually in the tax system. Gov.gr uses the same concept in its official service title: “Attribution of Tax Identification Number (AFM) and key to natural person.”
So, in simple terms, the AFM is the number that links you to the Greek tax administration. It is not just an abstract tax code. It becomes your reference for many official tax and registry interactions in Greece.
Here is an example of the AFM number document
Why do you need an AFM in Greece?
Because many important administrative steps in Greece are built around it.
Gov.gr says that when applying for an AFM, you or your representative enter your personal details, identification document, contact details, and even the desired username for Taxisnet. AADE also states that the AFM application is at the same time a request for an Authentication Key, and after successful processing the applicant receives the TIN issuance certificate and access credentials to AADE’s digital services.
That means the AFM is not only a tax number. In practice, it is often the gateway to your wider digital tax identity in Greece.
You often need an AFM to use Greek tax and registry services
One of the clearest practical examples is the tax registry certificate. Gov.gr says that to issue this certificate, citizens and businesses need their personal Taxisnet credentials and then log in to the relevant Register and Contact application. Since the AFM process is tied to the issuance of the Authentication Key and access credentials, the AFM sits at the center of that digital setup.
This is one reason applicants often underestimate the AFM. They think they just need “a number,” when in reality they are setting up access to a broader Greek tax-admin environment. That is precisely why AFM Greece focuses on helping clients get the AFM correctly from the beginning, not just somehow obtain a number and deal with the confusion later.
You often need an AFM if you want to buy property in Greece
Property is one of the most common reasons non-residents need an AFM.
AADE’s property manual states that the TIN is a unique nine-digit number and explains that, whether you live in Greece or abroad, buying property in Greece comes with tax obligations before and after the purchase. Current AADE guidance also says that in every purchase and sale of property in Greece, transfer tax is imposed and its payment is the responsibility of the buyer, while foreign residents who acquire property must generally submit E9 and are then subject to ENFIA for property held in Greece.
So if someone is planning to buy a house, apartment, or investment property in Greece, the AFM is usually one of the first practical administrative steps to sort out. This is exactly the kind of case AFM Greece is built for.
You need an AFM to start a sole proprietorship in Greece
Gov.gr’s page for starting a sole proprietorship is very direct: one of the listed requirements is that you need to have a valid and active Greek Tax Identification Number (AFM).
So if your plan involves freelance work, self-employment, or starting a small business in Greece, the AFM is not optional background paperwork. It is one of the official prerequisites.
Non-residents can also get an AFM
This point is important because many foreign applicants assume the AFM is only for Greek residents.
Gov.gr explicitly states that the request can be submitted by the interested person themselves as a natural person irrespective of their tax residence. AADE’s page for Greeks abroad and non-residents says the same process is available electronically through the “TIN & Authentication Key” application.
So the AFM is not reserved for people already established in Greece. It is also relevant for non-residents who need to interact with the Greek tax system for property, business, or other administrative reasons.
Does having an AFM make you a Greek tax resident?
No, not by itself.
AADE’s FAQ for Greeks abroad and non-residents explains that Greek tax residence depends on criteria such as your permanent or principal residence, usual place of residence, centre of vital interests, or extended physical presence in Greece. Simply having an AFM is not listed as a standalone criterion for becoming a Greek tax resident.
That is a useful reassurance for many applicants abroad. You may need an AFM for practical reasons in Greece without that automatically meaning you have become a Greek tax resident.
Why many applicants prefer AFM Greece
Because the AFM is more important than it first looks.
Officially, it is your Greek Tax Identification Number. Practically, it often becomes the foundation for property tax obligations, digital tax access, certificates, and business setup. The process exists online and is workable, but many applicants still want help choosing the correct route, preparing the right file, and avoiding mistakes that create delays later.
That is exactly what AFM Greece proposes: helping non-residents get the AFM properly, with clarity on why they need it and how it fits into the bigger picture.
Final word
So, what is an AFM number and why do you need one in Greece?
It is your Greek Tax Identification Number: a unique number that identifies you in the Greek tax system. You often need it to interact with Greek tax services, to access digital tax tools, to buy and hold property, and to start a sole proprietorship. Non-residents can also obtain one, and having one does not automatically make you a Greek tax resident.
For many applicants abroad, the smartest move is not to wait until the AFM becomes urgently necessary. It is to get it sorted early and correctly. That is precisely what AFM Greece is here to help with.
Ready to apply for your Greek AFM? Let AFM Greece help you handle the process with clear guidance and the right documents from the start. Submit your request today and take the next step with confidence.
The FAQ below follows the same current official framework on AFM definition, non-resident access, property, business setup, and tax-residence distinction.
FAQ
What is an AFM number in Greece?
An AFM is the Greek Tax Identification Number used by the tax administration to identify you individually.
Is an AFM the same as TAXISnet?
No. The AFM is your tax number, while TAXISnet/myAADE is the digital access environment linked to your tax profile.
Do non-residents need an AFM in Greece?
Often, yes. Non-residents may need an AFM for property, tax-admin, or business-related steps in Greece.
Do I need an AFM to buy property in Greece?
In practical terms, yes. Property acquisition in Greece involves tax obligations such as transfer tax and later E9/ENFIA administration.
Do I need an AFM to start a business in Greece?
Yes, if you want to start a sole proprietorship, a valid and active Greek AFM is one of the official requirements.
Does having an AFM make me a Greek tax resident?
No. Greek tax residence depends on separate legal criteria and not simply on having an AFM.
Can I apply for an AFM online?
Yes. The current official process allows electronic application, with identification completed through the available official routes.
What is the easiest option for most non-residents?
For many applicants abroad, the easiest option is to use AFM Greece so the AFM is handled correctly from the start and fits the real reason they need it in Greece.
