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Alkinoos Thomas Konis

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Tax Residency & Social Security in Greece for Foreign Residents (2026): AFM, EFKA & Next Steps After Law 5275/2026

By Global Law Experts

– posted 53 minutes ago

Understanding tax residency in Greece for foreigners has become more urgent, and more complex, since Law 5275/2026 reshaped residence‑permit classifications and D‑visa application routes earlier this year. Whether you are a digital nomad who recently relocated to Athens, an investor acquiring property in the islands, or a non‑EU employee transferring to a Greek subsidiary, the compliance steps you take in your first weeks on Greek soil will determine your tax exposure for years to come. Greece’s Independent Authority for Public Revenue (AADE) treats any individual present in the country for a period exceeding 183 days cumulatively during any twelve‑month period as a Greek tax resident from the first day of presence, a rule that catches many newcomers off guard.

This guide walks you through the legal tests for tax residency, the practical process for obtaining an AFM and registering with EFKA, your obligations under double tax treaties, and the specific changes introduced by Law 5275/2026 that every foreign resident needs to act on now.

Quick Checklist: 8 Immediate Steps After Receiving a Residence Permit

At‑a‑Glance Compliance Checklist

Before diving into the detail, use this checklist to prioritise your first actions. Each step is explained in full in the sections that follow.

Apply for an AFM (tax identification number) at your local tax office, allow 1–5 working days.
Activate Taxisnet (the AADE online portal), required for all electronic tax filings; activation codes arrive within 5–7 working days.
Register your address with the municipality (Δήμος) where you reside, needed for tax and EFKA purposes.
Enrol with EFKA (Unified Social Security Fund) if you will work as an employee, self‑employed individual or freelancer, registration is mandatory before commencing work.
Notify your employer (if applicable) of your AFM, EFKA number and residence permit details so payroll withholding and social security contributions begin correctly.
Review double tax treaties between Greece and your country of origin, determine tie‑breaker residency and available credits or exemptions.
Plan your first tax filing, Greek tax returns are due by 30 June of the year following the tax year; advance payments may also apply.
Engage a qualified lawyer or accountant, professional guidance is essential, particularly where Law 5275/2026 changes interact with special tax regimes.

Who Is a Greek Tax Resident? Legal Tests for Tax Residency in Greece for Foreigners

Greek tax residency is governed by Article 4 of the Income Tax Code (Law 4172/2013). AADE applies three principal tests, any one of which is sufficient to establish residency. Understanding these tests is the foundation of every compliance decision a foreign resident must make.

The 183‑Day Rule, Rolling 12‑Month Aggregation

The most widely cited criterion is physical presence. According to AADE’s published guidance, “an individual being in Greece for a period exceeding one hundred eighty‑three (183) days, cumulatively, during any twelve‑month period, shall be considered a Greek tax resident from the first day of his/her presence in Greece.” Several points deserve emphasis. First, the 183‑day count is cumulative, short trips abroad do not reset the clock. Second, the reference period is any rolling twelve‑month window, not the calendar year alone. Third, and critically, residency is backdated: once the 183‑day threshold is crossed, AADE treats the individual as resident from the very first day they were present in Greece during that period.

Consider an example. A non‑EU national enters Greece on 1 March 2026 with a valid residence permit. She travels abroad for two weeks in April and again for ten days in July but otherwise remains in Greece. By late August she will have accumulated more than 183 days of presence within the rolling twelve months, triggering Greek tax residency retroactively from 1 March. Her worldwide income becomes taxable in Greece from that date.

Centre of Vital Interests, Family and Economic Ties

Even if the 183‑day threshold is not met, AADE may classify a foreigner as tax resident where Greece is the person’s centre of vital interests. As the gov.gr portal states, a natural person is a tax resident of Greece if “they have their permanent, main or habitual residence, or their centre of vital interests” in the country. In practice, AADE considers factors such as the location of family members (especially dependants), the place where economic activities are managed, and where social or professional ties are strongest. Investors who purchase property, open businesses, or enrol children in Greek schools may inadvertently satisfy this test even without spending 183 days on Greek territory.

Other Indicators and the AADE Challenge Process

Additional indicators include holding a Greek diplomatic or public‑sector position abroad and maintaining a permanent home in Greece. If AADE issues a residency determination you believe is incorrect, administrative appeal procedures are available under Greek tax law. Retaining detailed travel logs, airline boarding passes, foreign utility bills and evidence of ties to another jurisdiction is essential. Time limits for filing administrative appeals are strict, so obtaining legal counsel at the earliest opportunity is strongly advised. Residents seeking to find a lawyer in Greece with immigration and tax expertise should act before AADE deadlines expire.

Law 5275/2026, What Changed for Immigration and Why It Matters for Tax Residency

Key Administrative Changes: D‑Visa Flows and In‑Country Applications

Law 5275/2026, published in the Government Gazette (FEK) in early 2026, introduced significant procedural reforms affecting non‑EU nationals. Industry observers note that among the most impactful changes is the abolition of in‑country applications for certain residence‑permit categories, notably the digital nomad residence permit. Applicants are now required to obtain a national (D‑type) visa from a Greek consulate before entering the country, rather than converting status after arrival. This administrative tightening alters the timeline on which a foreign national begins accumulating days of lawful presence in Greece.

Direct Implications for Tax Residency Timing and Evidence

The interaction between Law 5275/2026 and tax residency is practical rather than statutory, the Income Tax Code’s 183‑day rule has not been amended. However, because Law 5275/2026 changes when and how a non‑EU national enters Greece on a valid long‑term basis, it indirectly affects the accumulation of presence days and, therefore, the point at which tax residency is triggered. Under the prior regime, an individual might have arrived on a short‑stay (Schengen) visa, applied in‑country for a residence permit, and begun accumulating presence from the arrival date. Under the new law, the D‑visa requirement means the formal entry‑for‑residence date is typically later, but once the individual is on Greek soil with a valid visa, every day counts.

Early indications suggest that AADE will continue to count all days of physical presence regardless of visa type, so travellers who spend time in Greece on a tourist visa before switching to a D‑visa should be particularly careful. The likely practical effect is that anyone planning to register for tax in Greece should coordinate their travel dates with their D‑visa issuance to avoid unintended early accumulation of residence days.

AFM, Taxisnet & Local Tax Registration, Step‑by‑Step to Register for Tax in Greece

How to Apply for an AFM in Greece

The AFM (Αριθμός Φορολογικού Μητρώου) is your Greek tax identification number. Without it, you cannot open a bank account, sign a lease, receive employment income or register with EFKA. The process is administered by local tax offices (DOY, Δημόσια Οικονομική Υπηρεσία). For non‑EU nationals, the designated office is usually the DOY for foreign residents in your municipality, in Athens, this is typically the DOY Katikon Exoterikou. You must attend in person or through an authorised legal representative.

Document	Who Provides It	Notes
Valid passport (original + copy)	Applicant	Must be current; some offices require a certified translation
Residence permit or D‑visa	Applicant / Greek authorities	Present the original; photocopy retained by DOY
Proof of address in Greece	Landlord / utility provider	Lease agreement, utility bill, or municipal registration certificate
Completed M1 form	DOY (available on‑site or via gov.gr)	Fill in Greek or have your representative complete it
Power of attorney (if applicable)	Applicant / notary	Required if an authorised representative applies on your behalf

Processing typically takes one to five working days. In busy urban offices, same‑day issuance is possible if all documents are in order.

Taxisnet Activation and Representation

Once you hold an AFM, you must activate Taxisnet, AADE’s electronic tax portal. Taxisnet is essential for filing annual income‑tax returns, receiving tax assessments and managing withholding certificates. Activation requires submitting a request through the AADE website or at the issuing DOY. Activation codes are typically mailed to your registered Greek address within five to seven working days. Foreign residents who do not read Greek should appoint a tax representative (an accountant or lawyer with Taxisnet access) who can file on their behalf. The representative’s appointment is formalised through a specific AADE authorisation procedure.

Sample Timelines

From the date you first visit the DOY, expect the following approximate timeline: AFM issuance (1–5 days), Taxisnet activation code receipt (5–7 days), first electronic filing capability (within 2 weeks). If a power of attorney or certified translation is needed, add an additional 3–5 days for notarisation. For a deeper walkthrough, including opening a Greek bank account and proof‑of‑income requirements, see our forthcoming guide on how to get an AFM, open a Greek bank account and proof of income for residence permits.

EFKA Registration and Social Security Contributions for Tax Residency in Greece for Foreigners

Registration with EFKA (Ενιαίος Φορέας Κοινωνικής Ασφάλισης) is mandatory for any person gainfully employed or self‑employed in Greece, regardless of nationality. EFKA registration for non‑EU residents follows the same procedural pathway as for Greek nationals, but requires additional immigration documentation.

Employee vs Self‑Employed vs Freelancer, Who Pays What

The structure of social security contributions under EFKA depends on your employment status. Employees have contributions split between employer and employee, with the employer bearing the larger share. Self‑employed individuals and freelancers bear the full cost of their own contributions, calculated on declared income classes.

Worker Type	EFKA Registration Trigger	Typical Contributions & Notes
Employee (dependent employment)	Employer registers the employee with EFKA before the first day of work; requires AFM and residence permit	Total contributions are split: employer pays approximately 22–24% of gross salary; employee pays approximately 13–14%. Exact percentages vary by insurance branch (main pension, supplementary, healthcare, unemployment).
Self‑employed / Freelancer (independent activity)	Individual registers at the local EFKA branch upon commencement of activity; requires AFM, residence permit, and a business start declaration (start at DOY)	Self‑employed pay the full contribution on declared income categories. Monthly contributions include main pension, healthcare and supplementary pension. Check the current EFKA contribution tables for exact rates, as these are updated periodically.
Investor / Landlord (passive income only)	Generally no EFKA obligation if no active employment or self‑employment in Greece	Rental income and investment returns are subject to income tax but typically do not trigger EFKA contributions unless the individual also engages in professional activity.

The documents required for EFKA registration typically mirror those needed for AFM: valid passport, residence permit, AFM number, proof of Greek address, and, for employees, a copy of the employment contract. Self‑employed individuals must also present their business start notification from the DOY.

Voluntary Contributions and Options for Non‑EU Residents

Non‑EU residents who are not employed or self‑employed in Greece but wish to build social security entitlements (for example, to access public healthcare or accumulate pension credits) may explore voluntary EFKA enrolment. Eligibility criteria and contribution categories for voluntary insurance are set out on the EFKA official website. In practice, voluntary registration is uncommon among short‑term residents, but it may be strategically valuable for individuals planning long‑term stays. More detailed guidance is covered in our planned article on EFKA registration for non‑EU residents and contribution options.

When Coverage Starts and Coordination With Foreign Systems

EFKA coverage commences on the date of registration. For employees, the employer’s notification to ERGANI (the labour‑market information system) triggers the EFKA obligation simultaneously. For EU/EEA nationals, Regulation (EC) No 883/2004 coordinates social security entitlements across member states, preventing double contributions and preserving accrued rights. Third‑country nationals may benefit from bilateral social security agreements between Greece and their home country, where such agreements exist.

Tax Obligations for Foreign Residents in Greece, Filing, Withholding, Rates and Special Regimes

Resident vs Non‑Resident Tax Treatment

Issue	Resident Individuals	Non‑Resident / Short‑Term Visitors
Taxable income	Worldwide income	Greek‑source income only
Filing obligation	Annual return + possible advance tax payments	Return required if Greek‑source income or withholding applies
Social security	EFKA contributions if employed or self‑employed	May be exempt if no Greek employment / coordination applies

The distinction is stark. A foreign resident classified as a Greek tax resident under Article 4 of Law 4172/2013 must declare and pay tax on worldwide income, including salaries, business profits, rental income and investment returns earned outside Greece. Non‑residents, by contrast, are liable only on income sourced within Greece. This makes the determination of tax residency the single most consequential compliance question for any foreigner living in the country.

2025–2026 Tax Rate Changes and Implications

Greece taxes personal income on a progressive scale. Industry observers note that reforms effective from the beginning of 2026 adjusted several tax brackets, broadly reducing rates by approximately two percentage points across most income bands. The practical effect for newly arrived foreign residents is that while the marginal rates remain progressive (ranging from 9% on the lowest bracket up to 44% on the highest), the overall burden has eased modestly. Foreign residents should consult the latest published tax tables from AADE and the relevant Government Gazette announcements to confirm the rates applicable to their specific income levels.

Special Regimes: Non‑Dom and Expat Incentives

Greece offers several special tax regimes designed to attract foreign investment and talent. The non‑dom regime allows qualifying individuals who transfer their tax residence to Greece and invest a minimum amount to pay a fixed annual levy on foreign‑source income rather than at standard progressive rates. Separately, the expat regime provides a 50% income‑tax exemption on Greek‑source employment income for qualifying individuals who were non‑Greek tax residents for at least five of the six years preceding their application. Eligibility conditions, investment thresholds and application deadlines are strictly enforced. For details on the non‑dom programme, see the Greece practice hub on our site. A dedicated guide to special tax regimes is in preparation.

Double Taxation in Greece, Using Tax Treaties as a Foreign Resident

How to Check Whether a Treaty Applies (Tie‑Breaker Rules)

Greece has concluded double tax treaties with more than 50 countries. These treaties, which generally follow the OECD Model Tax Convention, contain tie‑breaker rules (typically in Article 4) that resolve cases where an individual qualifies as tax resident in both Greece and another state simultaneously. Tie‑breaker criteria are applied in a specific hierarchy: permanent home, centre of vital interests, habitual abode, and nationality. If none of these resolves the question, the treaty provides for a mutual agreement procedure between the two states’ tax authorities.

Withholding, Credits and Relief, Stepwise Approach

Once the applicable treaty is identified, the foreign resident should determine which income types are allocated to each state (employment income, dividends, interest, royalties, pensions) and whether relief is provided through exemption, credit or reduced withholding rates. In practice, this means filing the correct forms with AADE to claim foreign tax credits, ensuring that foreign taxes paid are documented with official certificates from the other state’s revenue authority, and, where applicable, requesting reduced withholding at source by submitting a certificate of tax residence issued by AADE.

Example Notes: UK, Germany, USA

The Greece–UK and Greece–Germany treaties broadly follow the OECD Model and provide for credit relief. The Greece–US treaty pre‑dates the current OECD Model but remains in force with its own specific provisions. In all three cases, residents should review the treaty text, consult AADE guidance, and retain all foreign tax documentation. Further country‑specific examples will appear in our forthcoming article on using double tax treaties when moving to Greece.

Common Scenarios and Worked Examples

The following four scenarios illustrate how tax residency in Greece for foreigners, EFKA obligations and treaty planning interact in practice.

Scenario 1, Digital nomad (non‑EU). A software developer from Brazil obtains a D‑visa and digital nomad residence permit. She arrives in September 2026 and plans to stay 12 months. She will cross the 183‑day threshold in March 2027, at which point her worldwide income becomes taxable from the first day of presence. She must obtain an AFM immediately, register for Taxisnet and, depending on her employment structure, register with EFKA. She should review whether the digital nomad tax regime offers special treatment for remote‑source income.
Scenario 2, Relocating employee (UK national). A marketing director transfers to a Greek subsidiary on a local contract. His employer registers him with EFKA before his first day. He obtains an AFM and activates Taxisnet within two weeks. The Greece–UK double tax treaty’s tie‑breaker provisions determine that Greece is his residence state because his family home and centre of vital interests have moved. He must declare worldwide income in Greece and claim credit for any UK tax withheld.
Scenario 3, Property investor (US national). An American purchases a villa and spends four months per year in Greece. She is below the 183‑day threshold and maintains her centre of vital interests in the US. She is a non‑resident for Greek tax purposes but must still obtain an AFM and file a Greek tax return for rental income earned from the property. EFKA registration is unnecessary because she has no employment or self‑employment activity in Greece.
Scenario 4, Family relocation (non‑EU). A family of four relocates from Canada. The working spouse obtains a residence permit and employment. The non‑working spouse has no Greek income but may trigger tax residency through centre‑of‑vital‑interests criteria (family home, children enrolled in Greek school). Both spouses should obtain AFMs and file individual returns. The working spouse registers with EFKA; the non‑working spouse does not, unless she begins employment or self‑employment. Red flag: AADE may audit if only one spouse declares residency while the family lives together in Greece.

Practical Q&A and Next Steps

The most common operational questions from newly arrived foreign residents relate to timing: When exactly do I become tax resident? How quickly must I register? The answer, in every case, is that the clock starts on the first day of physical presence. There is no grace period. Registering for an AFM and activating Taxisnet should be treated as day‑one priorities, not tasks to defer until tax‑filing season. If you are working, whether employed or self‑employed, EFKA registration must happen before (or simultaneously with) the commencement of work.

For case‑specific guidance tailored to your nationality, visa type and income profile, consult a qualified immigration and tax lawyer in Greece. You can find a lawyer in Greece through our directory.

Conclusion

Tax residency in Greece for foreigners is determined by clear but strictly enforced rules, the 183‑day physical presence test and the centre‑of‑vital‑interests analysis. Law 5275/2026 has not changed these tax rules directly, but its reforms to D‑visa flows and residence‑permit procedures alter the practical timeline on which non‑EU nationals begin accumulating days of presence. The compliance sequence is straightforward: obtain your AFM, activate Taxisnet, register with EFKA if working, and plan your double‑taxation position from day one. Failure to act promptly risks retroactive tax assessments, penalties, and complications with social security entitlements.

Greece’s special regimes, including the non‑dom programme and the expat income‑tax exemption, offer meaningful benefits for qualifying individuals, but eligibility windows are narrow and application deadlines are firm. Whether you are a remote worker, an investor or a relocating professional, the interaction between immigration status, tax obligations and social security contributions deserves careful, case‑specific analysis. For personalised guidance on tax residency in Greece for foreigners and all related compliance steps, consult a qualified Greek immigration and tax lawyer through our Greece lawyer directory.

Need Legal Advice?

This article was produced by Global Law Experts. For specialist advice on this topic, contact Alkinoos Thomas Konis at Nexus Law Firm, a member of the Global Law Experts network.

Sources

FAQs

When does a foreign resident become a tax resident in Greece?

Under Article 4 of the Income Tax Code (Law 4172/2013), an individual becomes a Greek tax resident if present in Greece for a period exceeding 183 days cumulatively during any twelve‑month period. AADE applies this rule retroactively, residency status is deemed to exist from the first day of presence in Greece during the relevant period. Alternatively, if Greece is the person’s centre of vital interests (family home, main economic activity), tax residency can arise regardless of the number of days spent in the country.

How do I get an AFM and register with EFKA after receiving a residence permit?

Apply for an AFM at the competent local tax office (DOY) by presenting your passport, residence permit, proof of Greek address and a completed M1 form. Once you have your AFM, activate Taxisnet online. For EFKA, employees are registered by their employer before work begins; self‑employed individuals register at their local EFKA branch with their AFM, residence permit, and business start declaration. Processing for AFM issuance typically takes one to five working days.

Do digital nomads have to pay Greek income tax and social security?

If a digital nomad meets the tax residency criteria, primarily the 183‑day rule or centre‑of‑vital‑interests test, then worldwide income is subject to Greek income tax. EFKA registration may also apply depending on whether the individual is classified as self‑employed in Greece. Non‑resident digital nomads (those below 183 days and without a Greek centre of vital interests) are liable only for tax on Greek‑source income, if any. The interaction between the digital nomad visa regime and the special Article 5C tax regime warrants professional advice.

How do double tax treaties affect new residents?

Double tax treaties allocate taxing rights between Greece and the treaty partner and contain tie‑breaker rules for individuals who qualify as resident in both countries. In practice, treaties provide relief through foreign tax credits (the most common method in Greek treaties), exemptions for certain income types, or reduced withholding rates on dividends, interest and royalties. New residents should identify the applicable treaty, determine which income types are affected, and file the correct documentation with AADE to claim credit for foreign taxes already paid.

What are the EFKA contribution rates for employees vs self‑employed?

For employees, total social security contributions are split between employer and employee. The employer’s share is approximately 22–24% of gross salary, while the employee’s share is approximately 13–14%, covering main pension, supplementary pension, healthcare and unemployment insurance. Self‑employed individuals pay the full contribution themselves, calculated on declared income classes. Rates are updated periodically, check the current EFKA contribution tables published on the EFKA official website for the exact percentages applicable in 2026.

Can I challenge an AADE residency determination?

Yes. Greek tax law provides administrative appeal procedures against AADE residency determinations. An individual who disagrees with a classification as Greek tax resident may file an administrative appeal within the time limits prescribed by the Tax Procedures Code. Supporting evidence is critical, retain travel records, boarding passes, foreign utility bills, employment contracts, and any documentation establishing your centre of vital interests in another country. Engaging legal counsel before the appeal deadline is essential, as late submissions are generally not accepted.

What immediate steps should I take after arrival to avoid tax problems?

Apply for an AFM within the first few days of arrival. Activate Taxisnet as soon as you receive your AFM. If you will be working in Greece, register with EFKA before or on the first day of work. Begin documenting your arrival date and every subsequent entry and exit, this travel log is your primary evidence for the 183‑day calculation. Review any applicable double tax treaty between Greece and your home country and seek professional advice on whether a special tax regime (non‑dom, expat incentive) applies to your situation. Early planning is far less costly than retroactive corrections.