1. Atomiki Epicheirisi: sole proprietorship
Atomiki Epicheirisi is the simplest form to launch an independent activity in Greece.
Atomiki Epicheirisi (sole proprietorship) is the Greek equivalent of the French micro-enterprise. Registration is done via AADE (tax administration) and e-EFKA (unified social security) in 5 to 10 days. The fiscal number AFM (SIRET equivalent) and e-EFKA number are assigned separately. No share capital required. Atomiki Epicheirisi is widely used by freelancers, liberal professions (doctors, lawyers, architects), individual traders, and craftspeople.
Fiscally, Atomiki Epicheirisi is taxed at personal income tax per the 2025 Greek progressive scale: 9% up to €10,000, 22% from €10,000 to €20,000, 28% from €20,000 to €30,000, 36% from €30,000 to €40,000, 44% beyond. To this add the solidarity contribution (solidaire 2.2% to 10% by income, partially suspended since 2021 for work income). For new Atomiki Epicheirisi independents, a 50% tax reduction applies during the first 3 years under certain income and activity conditions.
e-EFKA contributions (Unified Social Security Fund, created in 2017 by merging former funds) vary by activity and income. For freelancers « ελεύθεροι επαγγελματίες » (liberals), the system combines 6 contribution categories per income declaration. For 2025, monthly amounts are approximately: category 1 (low reference income) ~€230/month, category 6 (high reference income) ~€700/month. The founder chooses their category based on declared income, with possibility of annual adjustment.
Temporary advantage for new independents
Young liberal professionals (« νέοι ελεύθεροι επαγγελματίες ») benefit during the first 5 years from reduced e-EFKA contributions: category 1 flat-rate (~€230/month) instead of real-income calculation. Beyond 5 years, standard regime applies. For very high incomes, this advantage is capped by the contribution balance to pay for subsequent years (progressive catch-up mechanism).