Estonian CIT 2026 in Poland — Thresholds, Eligibility & Is It Worth It?

The lump-sum tax on company income — commonly called Estonian CIT after the Estonian model that inspired it — has been available in Poland since 2021 and grows more popular each year. In 2026, companies can still use the regime under the same conditions as before, because the planned legislative changes stalled at the public consultation stage. That's good news for foreign founders considering the switch or already benefiting from it. This article covers the current thresholds, formal requirements, the "hidden profits" mechanism, and shows when Estonian CIT pays off — and when you're better off staying with standard CIT at 9%.

What is Estonian CIT and why didn't it change in 2026?

Estonian CIT is an alternative corporate tax system for Polish commercial-law companies. Its core feature is tax deferral — the company pays no CIT on accounting profit; tax is triggered only by actual dividend payments, hidden profits, and other forms of distribution. As a result, profits reinvested in growth remain completely untaxed for the entire period the company stays in the regime.

For 2026, the Ministry of Finance (MF — Ministerstwo Finansów) prepared draft bill UD116, aiming to tighten Estonian CIT. The bill proposed expanding the catalogue of hidden profits and treating any profit distribution after exiting the regime as originating from the Estonian-CIT period (even after switching back to standard CIT). However, the bill did not enter into force on 1 January 2026 because it failed to meet vacatio legis requirements and remains under consultation. This means 2026 operates under the same, more favourable rules as 2025.

Small-taxpayer threshold for Estonian CIT 2026

Small-taxpayer status determines whether your company applies the preferential 10% rate or the standard 20%. In 2026 the thresholds are:

• Threshold based on 2025 revenue: gross revenue (VAT-inclusive) ≤ 8,517,000 PLN (the PLN equivalent of EUR 2 million at the NBP exchange rate of 1 October 2025).
• In-year threshold (2026): 8,431,000 PLN — if the company exceeds this amount during the year, it loses small-taxpayer status retroactively from 1 January of that year and switches to the 20% rate.

Note that the threshold uses gross revenue including VAT, not net. This is a critical distinction — companies with high VAT-able turnover may exceed the limit despite relatively modest net results. We discuss the small-taxpayer threshold in more detail in our article on CIT 9% for small taxpayers in 2026.

Estonian CIT rates — comparison table

The effective tax burden under Estonian CIT depends on company status and the timing of profit distribution. The table below summarises the rates and their real-world tax consequences:

Parameter	Small taxpayer	Other taxpayers
Lump-sum rate (CIT)	10%	20%
PIT on dividend	19% (after crediting CIT paid)	19% (after crediting CIT paid)
Effective combined tax	approx. 20%	approx. 25%
Gross revenue threshold (based on 2025)	≤ 8,517,000 PLN	> 8,517,000 PLN
Tax on reinvested profits	0% (no distribution = no tax)	0% (no distribution = no tax)

The key advantage of Estonian CIT is shown in the last row: as long as profit stays in the company and is reinvested, the effective CIT rate is 0%. Tax arises only upon distribution.

Who can use Estonian CIT? Legal forms and shareholder requirements

The lump-sum tax on company income is available only to specific legal forms. In 2026, eligible entities are:

• Sp. z o.o. — limited liability company (the most common choice for foreign founders)
• S.A. — joint-stock company
• PSA (prosta spółka akcyjna — simple joint-stock company)
• Sp. komandytowa — limited partnership
• S.K.A. — limited joint-stock partnership

If you're deciding which legal form to use, read our comparison: limited partnership vs. Sp. z o.o. in 2026.

Absolute requirement: all shareholders (partners, stockholders) must be natural persons only. Even a single legal entity in the ownership structure — a holding company, investment fund, or foreign corporation — causes the company to lose its right to the regime at the end of the year in which the breach occurred. This is one of the most common reasons companies lose Estonian CIT eligibility.

Estonian CIT conditions — full list of formal requirements

Beyond legal form and shareholder structure, the company must meet all of the following conditions simultaneously:

1. No use of PIT/CIT reliefs granting tax exemptions (e.g., Special Economic Zone or Polish Investment Zone incentives).
2. Over 50% of revenue from operating activities — passive investment income (interest, royalties, capital gains) must not dominate.
3. Minimum 3 employees on employment contracts (umowa o pracę) at no less than 3/4 of full-time equivalent, with remuneration not lower than 300% of the national average wage. Alternatively: equivalent spending on civil-law contracts (umowa zlecenia / o dzieło).
4. No shareholdings in other entities — a company on Estonian CIT cannot hold shares or interests in other companies.
5. Financial statements under Polish Accounting Standards (not IFRS/MSSF).

Breaching any condition during the tax period results in loss of eligibility and the obligation to settle tax under general rules — retroactively from the beginning of the year of breach.

Hidden profits under Estonian CIT — what to watch out for

Hidden profits (ukryte zyski, defined in Art. 28m(3) of the CIT Act) are one of the most critical concepts for companies on Estonian CIT. These are benefits provided by the company to its shareholders, board members, or related parties that effectively constitute profit distribution — even though they are not formally dividends.

Typical examples of hidden profits:

• Excessive remuneration — payments to shareholder-managers significantly above market rates.
• Personal use of company assets — cars, real estate, or equipment made available to shareholders below market value or free of charge.
• Preferential loans — loans to shareholders without interest or at below-market rates.
• Transactions with related parties — services, leases, or deals with entities controlled by shareholders at inflated prices.

Hidden profits are taxed at the same lump-sum rate as dividend payments (10% or 20%). Companies on Estonian CIT must therefore meticulously document all transactions with shareholders and ensure arm's-length pricing.

When does Estonian CIT pay off?

Estonian CIT delivers the greatest benefits in very specific business scenarios:

• Plan to reinvest profits for 5+ years — the company is growing, buying equipment, expanding infrastructure, and not paying dividends. Throughout this period, the effective CIT rate is 0%.
• Low share of management compensation in costs — the fewer transactions with shareholders, the lower the risk of hidden profits and additional taxation.
• Stable shareholder structure — natural persons only, with no plans to bring in institutional investors or holding entities.
• Technology and manufacturing companies — firms with high operating margins that reinvest in R&D or fixed assets.

Example: a Sp. z o.o. earning 500,000 PLN profit per year that reinvests everything for 5 years saves a total of approximately 225,000 PLN compared to standard CIT 9% + 19% PIT on dividends. More on the costs of setting up a Sp. z o.o. in a separate article.

When does Estonian CIT NOT pay off?

There are scenarios where switching to the lump-sum regime is financially disadvantageous:

• Planning to distribute dividends within 1–2 years — the effective 20–25% tax on rapid distribution can be higher than standard CIT 9% + 19% PIT on dividends (combined approx. 26.3%, but with the ability to optimise through deductible costs).
• Complex corporate structure — companies with legal entities among their shareholders cannot enter Estonian CIT at all. Restructuring ownership can be costly.
• High management salaries — shareholder-managers with large pay packages generate hidden profits subject to the additional lump-sum rate.
• Investment-holding companies — if more than 50% of revenue comes from passive investments, the company fails the operating-activity test.
• Need to hold shares in other entities — corporate groups are disqualified by definition.

Estonian CIT vs. standard CIT — tax burden comparison

The table below shows the difference in total tax burden for a company with 1,000,000 PLN profit, depending on the system and timing of distribution:

Scenario	Standard CIT 9%	Estonian CIT (small taxpayer)	Estonian CIT (large taxpayer)
CIT on profit	90,000 PLN	0 PLN (reinvestment) / 100,000 PLN (distribution)	0 PLN (reinvestment) / 200,000 PLN (distribution)
PIT on dividend (19%)	172,900 PLN	0 PLN (reinvest.) / ~90,000 PLN (distribution)	0 PLN (reinvest.) / ~76,000 PLN (distribution)
Total tax burden	262,900 PLN (26.3%)	0 PLN (reinvest.) / ~200,000 PLN (20%)	0 PLN (reinvest.) / ~250,000 PLN (25%)
Savings on reinvestment	—	262,900 PLN per year	262,900 PLN per year

As you can see, Estonian CIT's advantage is enormous when profits are reinvested, but it shrinks — and for large taxpayers practically disappears — when dividends are paid out immediately.

Entering and exiting Estonian CIT — procedure

Entry into Estonian CIT requires filing a ZAW-RD notification with the tax office by the end of the first month of the tax year in which the company wants to begin using the regime. All conditions must be met on the date of transition.

Exit from Estonian CIT is only possible after a minimum 4-year cycle from the date of election. After the cycle ends, the company may resign by filing a ZAR(R) declaration by the end of the first year after changing systems. Early exit is possible only through loss of eligibility (e.g., introducing a legal entity into the shareholder structure), but this triggers the obligation to pay tax on all undistributed profits accumulated during the entire Estonian-CIT period — which can be extremely costly.

Planned changes (draft UD116, not enacted in 2026): any profit distribution after exiting Estonian CIT would be treated as originating from the Estonian-CIT period — even after switching to standard CIT. This would effectively eliminate the "wait it out" strategy of accumulating profits and distributing them later under more favourable rules.

Most common mistakes with Estonian CIT

• Introducing a legal entity into the structure: even a single-person holding company owning 1% of shares disqualifies the company from Estonian CIT at the end of the year of breach. Verify the ownership structure before every share transaction.
• Exceeding the in-year threshold without monitoring: hitting 8,431,000 PLN gross (VAT-inclusive) revenue during the year triggers loss of small-taxpayer status retroactively from 1 January — meaning a surcharge for the entire year.
• Failing to identify hidden profits: a shareholder-CEO earning 50,000 PLN/month when the market rate is 20,000 PLN generates 360,000 PLN in annual hidden profits subject to the lump-sum tax.
• Dropping below the employment minimum: falling below 3 employees on employment contracts (≥ 3/4 FTE) even for one month can result in losing eligibility for the regime.
• Passive income dominance: a company whose rental income exceeds 50% of total revenue fails the operating-activity test — even if property rental is formally its core business.
• Attempting exit before 4 years: leaving before the cycle ends is not a "resignation" — it's a loss of conditions, triggering the obligation to pay tax on all accumulated undistributed profits.

FAQ — frequently asked questions about Estonian CIT 2026

Is Estonian CIT still available in 2026 under the same rules?

Yes. Draft bill UD116, which aimed to tighten the lump-sum tax on company income, did not enter into force on 1 January 2026 because it failed vacatio legis requirements. It remains at the public consultation stage. This means 2026 operates under the same rules as 2025 — no expansion of hidden-profit definitions and no changes to post-exit distribution rules.

What is the small-taxpayer threshold for Estonian CIT in 2026?

The small-taxpayer threshold for 2026 (based on 2025 revenue) is 8,517,000 PLN gross including VAT (equivalent to EUR 2 million at the NBP exchange rate of 1 October 2025). The in-year threshold for 2026 is 8,431,000 PLN. Exceeding the in-year limit triggers a switch to the 20% rate retroactively from the start of the year.

Can a single-shareholder Sp. z o.o. use Estonian CIT?

Yes, a single-shareholder Sp. z o.o. can use Estonian CIT, provided the sole shareholder is a natural person and all other conditions are met (minimum 3 employees, over 50% operating revenue, no shareholdings in other entities). However, a sole shareholder must be especially careful about hidden profits — all transactions between them and the company face heightened scrutiny from tax authorities.

What are hidden profits and how can you avoid them?

Hidden profits (ukryte zyski, Art. 28m(3) of the CIT Act) are benefits provided by the company to shareholders, board members, or related parties that constitute de facto profit distribution. To avoid them: set management remuneration at market levels, document all related-party transactions, never lend to shareholders without market-rate interest, and pay market-rate rent for any personal use of company assets.

How do you exit Estonian CIT, and can you leave before the 4-year cycle ends?

Voluntary exit is only possible after the 4-year cycle expires. You must file a ZAR(R) declaration by the end of the first year after switching systems. Early "exit" is only possible through loss of eligibility (e.g., adding a legal entity to the shareholder structure), but this triggers the obligation to pay tax on all undistributed profits from the entire Estonian-CIT period — which can be extremely expensive.

Summary — who should use Estonian CIT in 2026?

Estonian CIT 2026 remains one of the most powerful tax-optimisation tools for capital companies in Poland — but only for those that meet all conditions and have a clear profit-reinvestment strategy. The 10% rate for small taxpayers (threshold 8,517,000 PLN) combined with zero taxation on reinvested profits delivers an advantage no other Polish tax system can match.

If your company plans dynamic growth without profit distribution for at least 4–5 years, has a stable structure with only natural persons as shareholders, and maintains a low volume of transactions with those shareholders — Estonian CIT is the optimal choice. If, however, you plan rapid dividend payouts or have a complex corporate structure — standard CIT 9% may prove simpler and cheaper to maintain.

Regardless of your decision, keep monitoring draft bill UD116 — if it enters into force in future years, the rules for exiting Estonian CIT could change significantly to taxpayers' disadvantage.