The flat tax (or single-rate tax) is one of the most attractive fiscal promises for European expats. A single rate, applied to all income, without degressivity or complexity. Several European countries have adopted this system, with significant variations in terms of rates, tax base, and eligibility conditions.

This guide provides a comprehensive overview of European flat tax countries in 2026: which are they, what rates do they apply, for which profiles are they suited, and what are the limitations to know before settling there?

Disclaimer: The tax information below is indicative. Tax laws evolve. Consult an expert before making any expatriation decision.

Flat Tax vs Progressive Scale: What Are We Talking About?

The Progressive Scale: The French Model

In France, income tax follows a progressive scale: the more you earn, the higher the percentage you pay. In 2026, the brackets range from 0% (up to 11,497 EUR) to 45% (above 177,106 EUR). This means an entrepreneur earning 150,000 EUR per year will be taxed at different rates across their income brackets.

This system is considered equitable (high earners pay proportionally more), but it is complex, unpredictable, and can reach marginal rates that discourage high earners.

The Flat Tax: Simplicity and Predictability

In a flat tax system, a single rate applies to all taxable income, sometimes above a certain threshold. If the rate is 10%, you pay 10% whether you earn 20,000 EUR or 200,000 EUR.

Main advantages:

  • Simplicity: one box, one calculation
  • Predictability: you know exactly how much you will pay
  • Neutrality: no threshold effects, no disincentive to increase your income
  • International attractiveness: attracts entrepreneurs and investors

Limitations:

  • Relative regressivity: high earners pay the same rate as low earners (in percentage terms)
  • Variable tax base: the displayed rate does not tell the whole story, as what is included in the taxable base is crucial
  • Social contributions on top: the flat tax rarely covers social contributions, which can be significant

European Flat Tax Countries in 2026

Bulgaria: 10%, Europe’s Champion

Bulgaria has applied a flat tax of 10% on personal income since 2008. It is the lowest rate in Europe for an EU country. Details of the Bulgarian tax regime are published by the National Revenue Agency (nra.bg).

What the Bulgarian flat tax covers:

  • Employment income
  • Self-employment income
  • Dividends (separate rate of 5%)
  • Rental income

Social contributions: The flat tax does not cover social contributions. For a self-employed person in Bulgaria, contributions are calculated on a minimum monthly base (approximately 800 BGN in 2026, about 410 EUR). The annual amount is around 2,000-3,000 EUR depending on the situation, a fixed and predictable amount.

Ideal profile: Freelancer or entrepreneur with medium to high income (50,000 EUR+), wishing to remain in the EU with a low cost of living and simple taxation.

Read our complete guide: Moving to Bulgaria.

Romania: 10%, The Attractive Newcomer

Romania has adopted a flat tax of 10% on personal income. The regime for micro-enterprises (PFA and SRL-micro) is particularly advantageous. Official information is available on the ANAF (National Agency for Fiscal Administration) website.

The micro-enterprise regime: Romanian companies with turnover below 500,000 EUR can opt for a CIT of 1% (service activities) or 3% on turnover. This is a turnover-based tax, not a profit-based one, particularly advantageous for high-margin activities.

Dividends: Taxed at 8% in Romania.

Ideal profile: Entrepreneur with a high net margin, wishing to benefit from both very low CIT and a flat tax on personal income.

Read our complete guide: Moving to Romania.

Estonia: 20%, The Reinvented Flat Tax

Estonia has a flat tax of 20% on personal income. The rate is higher than Bulgaria or Romania, but with a major distinguishing feature.

The deferred distribution system: Estonian companies (OU) do not pay tax on profits as long as they are not distributed. The 20% tax (calculated on 20/80 of the gross amount distributed, i.e., an effective rate of 25%) is only due when dividends are distributed.

This means you can accumulate and reinvest your profits without tax friction, and only pay tax when you choose to distribute income to yourself.

For resident individuals:

  • 20% flat tax on all income
  • Basic allowance: 7,848 EUR/year (in 2026)
  • Income up to ~14,400 EUR: reduced progressive rate
  • Above: 20% flat

Ideal profile: Entrepreneur in a growth phase reinvesting profits, or digital nomad with an Estonian structure (e-Residency + OU).

Read our complete guide: Moving to Estonia.

Hungary: 15%, In the Most Competitive Tax Context

Hungary applies a flat tax of 15% on personal income. It is one of the most competitive rates in Central Europe.

What you need to know:

  • Hungarian CIT is 9%, the lowest in the EU
  • The employer social contribution (SZOCHO) is 13%
  • The minimum contribution base is approximately 266,800 HUF/month (about 700 EUR)

Dividends: Subject to the 15% flat tax + 13% social contribution (with a cap).

Ideal profile: Entrepreneur wishing to combine low CIT (9%) and flat tax income tax (15%), with a Central European presence.

Serbia: 15%, Outside the EU but Accessible

Serbia, while not an EU member, applies a flat tax of 15% on personal income. Its tax system is generally stable and predictable.

Specific advantages:

  • 15% CIT rate
  • No foreign exchange controls for foreign currency flows
  • Growing startup ecosystem (Belgrade)
  • Very low cost of living

Limitations:

  • Outside the EU: no freedom of movement for non-Serbian nationals
  • More limited international banking access

Ideal profile: Digital nomad or entrepreneur seeking a base in Southeast Europe at low cost, willing to be outside the EU.

Lithuania: The Patent and Self-Employment Regime

Lithuania is not a classic flat tax in the strict sense, but its patent regime allows self-employed individuals to pay a fixed lump sum instead of standard income tax. This system resembles a flat tax in its effects.

The patent regime:

  • Fixed annual payment based on the activity (between 50 and 2,000 EUR depending on the sector)
  • No income tax on income from the activity in question
  • Turnover cap: 45,000 EUR/year

Beyond the patent regime, Lithuania applies a progressive scale (20% up to approximately 100,000 EUR, 32% above).

Ideal profile: Freelancer with modest to medium income (<45,000 EUR), seeking administrative simplicity.

Latvia: 20% with a Micro Regime

Latvia applies a rate of 20% on income up to 20,004 EUR, then 23% above (in 2026). This is not a flat tax in the strict sense, but the micro-enterprise regime (25% on turnover for income up to 40,000 EUR/year) offers a simplified alternative.

Georgia: 1%, The Extra-European Case Worth Knowing

Although geographically located outside Europe in the traditional sense (but a member of the Council of Europe), Georgia deserves special mention for its small business regime: self-employed individuals with turnover below 500,000 GEL (approximately 170,000 EUR) can opt for a rate of 1% on their turnover.

This is technically a turnover tax rather than a flat income tax, but the practical result for a freelancer or consultant is extremely low taxation.

Furthermore, Georgia applies a territorial system: foreign-source income received by Georgian residents is not taxed locally (subject to conditions). The Georgia Revenue Service (rs.ge) publishes the official texts for the Small Business and Virtual Zone regimes.

Read our complete guide: Moving to Georgia.

European Flat Tax Comparison Table

Country Income Tax Rate (flat tax) CIT Dividends EU Social Contributions
Bulgaria 10% 10% 5% Yes ~2,500 EUR/year (self-employed)
Romania 10% 1-3% (micro turnover) 8% Yes ~5,000 EUR/year
Hungary 15% 9% 15% + 13% Yes Variable
Estonia 20% 0% (undistributed) 20/80 Yes ~4,800 EUR/year
Serbia 15% 15% 15% No Mandatory minimum
Lithuania (patent) Fixed lump sum 15% 15% Yes Reduced
Georgia 1% (turnover) / 20% standard 15% 5% (Georgian source) No None (no mandatory social contributions)

For Which Profile Is the Flat Tax Suited?

Freelancer and Consultant (Income 50,000-150,000 EUR/year)

The flat tax is particularly advantageous for medium-to-high-income freelancers. In France, a freelancer earning 100,000 EUR net is taxed at marginal rates of 41-45% + social contributions. In Bulgaria, the same individual pays 10% income tax + ~2,500 EUR in social contributions, a substantial saving.

Recommended destination: Bulgaria (10% income tax, EU, low cost of living) or Romania (10% income tax + micro CIT).

Entrepreneur with Reinvested Profits

For an entrepreneur who reinvests profits rather than distributing them, Estonia is often the best option: 0% CIT on undistributed profits, even though the final rate on dividends (25%) is higher than the Bulgarian flat tax.

Recommended destination: Estonia (OU, e-Residency).

Investor with Passive Income (Dividends)

If you primarily receive dividends from foreign companies, the choice depends on tax treaties. Cyprus (Non-Dom, 0% on dividends) or Georgia (0% on foreign source) may be more advantageous than a European flat tax.

Recommended destination: Cyprus (Non-Dom), Georgia.

High Income (>200,000 EUR/year)

For very high incomes, the Bulgarian flat tax at 10% remains competitive, but the calculation must include social contributions, setup costs, and quality of life. Dubai (0% income tax, 0% dividends) remains a reference for this profile, despite its higher cost of living.

Flat Tax Limitations Not to Overlook

1. Social contributions are not included. The displayed income tax rate represents only part of your total tax burden. Social contributions (health, retirement) come on top and can be significant.

2. Quality of social protection. In Bulgaria or Romania, social contributions give access to local health and pension systems that are not equivalent to the French system. This is a trade-off to make consciously.

3. Required substance. To benefit from the local flat tax, you must be a genuine tax resident of the country. This means spending at least 183 days on site, having a real address there, and in some cases having your center of interests there.

4. Possible legislative instability. Eastern European countries have sometimes modified their tax regimes. Romania, for example, reduced the micro regime in 2023. There is no guarantee that current rates will remain stable.

Flat Tax and International Taxation: Going Further

The flat tax is one of the most powerful tools for expats seeking to optimize their tax burden while staying in Europe. Bulgaria and Romania at 10% offer the best rate-to-quality-of-life ratio for the majority of profiles. But the displayed rate is just a starting point: the tax base, social contributions, and tax treaties with France determine your actual burden.