Estonian CIT (lump-sum tax on corporate income) allows a Polish sp. z o.o. to pay no corporate income tax as long as profits stay in the company. When a dividend is distributed, the combined effective rate (CIT + PIT) is 20% for small taxpayers and 25% for all others — compared with 26.29% and 34.39% under the standard CIT regime. The rules have not changed in 2026, but the regime is not right for every company.
What is Estonian CIT and how does it work?
Estonian CIT is a form of taxation where the company pays no tax on current income. Tax is triggered only when profits are distributed to shareholders — as a dividend or through so-called hidden profits. As long as the money stays in the company, no corporate income tax is due.
The official name is “lump-sum tax on corporate income” (ryczałt od dochodów spółek). The system was introduced in Poland in 2021 and expanded to nearly all capital companies from 2022. It was inspired by the Estonian corporate tax model — hence the popular name. Legal basis: Chapter 6b of the Act of 15 February 1992 on Corporate Income Tax (Journal of Laws 2025, item 278).
Three main advantages of Estonian CIT
- No ongoing corporate income tax. You do not pay monthly or quarterly CIT advances. All cash stays in the business.
- Lower effective rate on distribution. The combined tax burden (company CIT + shareholder PIT) is 20% or 25% instead of 26.29% or 34.39%.
- Simpler accounting. You do not maintain dual tax records. You settle exclusively on the basis of accounting profit, without calculating tax-deductible costs or tax depreciation.
From our experience at Progress Holding, companies that switched to Estonian CIT save an average of 15–20 hours per month on accounting — because they eliminate the dual tax-and-accounting reconciliation process.
What are the Estonian CIT rates in 2026?
The lump-sum rate is 10% for small taxpayers (revenue up to EUR 2 million, i.e. PLN 8,517,000 in 2026) and companies in their first year of operation, and 20% for all others. The rates have not changed in 2026.
When a dividend is paid, the shareholder owes 19% PIT but may reduce it by a portion of the CIT already paid by the company: by 90% at the 10% CIT rate or by 70% at the 20% CIT rate. This mechanism is what makes the combined effective rate lower than under the standard regime.
Effective tax comparison: Estonian CIT vs standard CIT
| Parameter | Standard CIT — small taxpayer | Standard CIT — large taxpayer | Estonian CIT — small taxpayer | Estonian CIT — large taxpayer |
|---|---|---|---|---|
| CIT rate on income | 9% | 19% | 0% (no distribution) / 10% (distribution) | 0% (no distribution) / 20% (distribution) |
| PIT on dividend (19%) | 19% of after-CIT profit | 19% of after-CIT profit | 19% minus 90% of CIT | 19% minus 70% of CIT |
| Combined effective rate | 26.29% | 34.39% | 20% | 25% |
| Saving vs standard CIT | — | — | 6.29 pp | 9.39 pp |
| Monthly advances | Yes | Yes | No | No |
Source: podatki.gov.pl — Estonian CIT, biznes.gov.pl — Estonian CIT.
How much do you save on PLN 1,000,000 of profit?
| Tax model | Company CIT | Shareholder PIT | Total tax | Net amount to shareholder |
|---|---|---|---|---|
| Standard CIT 9% | PLN 90,000 | PLN 172,900 | PLN 262,900 | PLN 737,100 |
| Standard CIT 19% | PLN 190,000 | PLN 153,900 | PLN 343,900 | PLN 656,100 |
| Estonian CIT 10% | PLN 100,000 | PLN 100,000 | PLN 200,000 | PLN 800,000 |
| Estonian CIT 20% | PLN 200,000 | PLN 50,000 | PLN 250,000 | PLN 750,000 |
On PLN 1 million of profit, a small taxpayer on Estonian CIT saves PLN 62,900 compared with standard CIT. A large taxpayer saves PLN 93,900. These amounts scale proportionally with the size of the profit.
Who can opt for Estonian CIT in 2026?
Estonian CIT is available to sp. z o.o., joint-stock companies, simple joint-stock companies, limited partnerships and limited joint-stock partnerships whose shareholders are exclusively natural persons. The company must employ at least 3 people under employment contracts or civil-law contracts.
Full list of conditions
- Legal form: sp. z o.o., S.A., P.S.A., sp.k., sp.k.a.
- Shareholders: natural persons only (no corporate shareholders, foundations or funds).
- No equity stakes in other entities: the company must not hold shares, stock or general partnership interests in other companies.
- Employment: at least 3 natural persons under employment or civil-law contracts (for at least 300 days per year or 82% of a tax year shorter than 12 months).
- Revenue structure: passive income (from receivables, interest, guarantees, sureties, etc.) must not exceed 50% of total revenue.
- Financial reporting: the company must not prepare financial statements under IAS/IFRS.
- Notification: form ZAW-RD filed with the head of the tax office by the end of the first month of the tax year in which you want to use Estonian CIT.
New companies enjoy a grace period: the employment requirement does not apply in the first year of operations and the following two years. The revenue-structure condition is deemed met in the first year.
Who benefits from Estonian CIT?
Estonian CIT works best for companies that reinvest profits and do not distribute them to shareholders on an ongoing basis. The longer profits remain in the company, the greater the benefit from the tax deferral.
Profile of the ideal candidate
- A company investing in growth. You are buying equipment, expanding the team, entering new markets. You need cash — Estonian CIT lets you keep 100% of income for reinvestment.
- A business with volatile income. Under standard CIT you pay advances on current income — even if you incur a loss three months later. Under Estonian CIT you pay nothing until you distribute profits.
- A family-owned company with a long-term outlook. The shareholders do not need immediate dividends. They are building company value. They will pay tax in a few years when they decide to distribute.
- A newly established sp. z o.o. Exemption from the employment requirement for 3 years and preferential entry conditions. In the early years, zero tax means faster capital accumulation.
Among our clients at Progress Holding, we see the greatest benefits in IT companies, marketing agencies and consulting firms — industries with low material costs and high margins that can afford to reinvest profits.
Who does not benefit from Estonian CIT?
Estonian CIT is not optimal for companies that regularly distribute all profits to shareholders, have a complex ownership structure or plan to bring in external investors that are not natural persons.
5 situations where Estonian CIT is disadvantageous
- Shareholders need a regular dividend. If you distribute all profit every year, the deferral benefit is zero. You save only on the lower effective rate (20% vs 26.29% for a small taxpayer) but lose the main advantage of the system — deferral.
- A shareholder is not a natural person. A foundation, investment fund or another company as a shareholder automatically disqualifies your firm from Estonian CIT.
- You plan to bring in an institutional investor. The entry of a VC fund or another corporate entity means you lose the right to the lump-sum regime. You will have to return to standard rules and settle the so-called initial adjustment.
- The company holds equity stakes in other entities. A holding with several subsidiaries cannot use Estonian CIT. Even a 1% stake in another company excludes you from the system.
- Numerous related-party transactions with shareholders. Office rent from a shareholder, loans to or from a shareholder, a company car used privately — all of these are potential “hidden profits” subject to taxation. If your company has many such transactions, the effective benefit of Estonian CIT shrinks.
What are hidden profits and why are they the biggest risk?
Hidden profits are monetary and non-monetary benefits provided by the company to shareholders or related parties, which are taxed under the lump-sum regime — even if the company does not formally pay a dividend.
The catalogue of hidden profits includes, among others: loans granted to shareholders, excessive remuneration for shareholder services, car expenses for private use (50% of costs), benefits for the shareholder’s family, and above-market rent paid to a shareholder for property.
We have carried out dozens of Estonian CIT implementations at Progress Holding and know that hidden profits are the most common cause of unexpected tax charges. Companies that did not review their related-party transactions before entering the system end up paying tax they did not expect.
Planned changes to hidden profit rules — what happened?
In September 2025, the Ministry of Finance published a draft amendment that was supposed to broaden the definition of hidden profits and remove the condition linking them to the right to a share in profit. However, the draft was not adopted by the government before the end of 2025. As a result, the Estonian CIT rules remain unchanged in 2026.
How to switch to Estonian CIT?
Switching to Estonian CIT requires filing a ZAW-RD notification with the head of the tax office by the end of the first month of the tax year in which you want to use the lump-sum regime. For companies with a calendar tax year, the deadline is 31 January.
Step-by-step procedure
- Verify the conditions. Check whether your company meets all formal requirements (legal form, shareholders, employment, no equity stakes in other entities).
- Run a profitability analysis. Compare effective taxation under both models. Factor in planned profit distributions, related-party transactions and investment plans.
- Close the books. Prepare financial statements for the final year under standard rules. Include the CIT/KW appendix with the CIT-8 return.
- Settle transitional differences. The initial adjustment covers differences between the tax and accounting results. Any resulting tax can be paid in instalments.
- File ZAW-RD. Notification to the tax office — by the end of the first month of the tax year.
At Progress Holding we run the full profitability analysis and handle the entire transition process — from the tax simulation through book closing to the ZAW-RD filing.
What we see in practice — the Progress Holding perspective
Based on the accounting support we provide to dozens of companies that have switched to Estonian CIT under our guidance at Progress Holding, we have collected data on typical benefits and pitfalls.
Who gained the most?
- IT companies with 2–3 shareholders that reinvested profits in team and product development. Eliminating CIT advances freed up PLN 100,000–300,000 in cash per year.
- High-margin service firms that did not distribute dividends for 2–3 years. Effective tax rate: 0% throughout that period.
- Newly established sp. z o.o. companies that took advantage of the employment exemption and entered the system from day one.
Three most common mistakes with Estonian CIT
- No related-party transaction audit before entering. Around 40% of companies we consulted had active lease agreements, loans or service contracts with shareholders — potential hidden profits that would trigger tax under Estonian CIT.
- Underestimating the initial adjustment cost. Transitional differences (e.g. from accounting vs tax depreciation) can generate a one-off tax liability on entry. Companies that overlooked this were caught off guard.
- No 4-year plan. Estonian CIT is a minimum 4-year commitment. Early exit triggers the obligation to pay tax on the initial adjustment and on profit from the entire period. Companies without a long-term strategy entered the system prematurely.
How much does the transition cost with Progress Holding?
Accounting services for an sp. z o.o. on Estonian CIT at Progress Holding start from PLN 799 net per month. Annual financial statement preparation starts from PLN 1,500 net. The profitability analysis, tax simulation and full transition support are priced individually. The current price list is available at progressholding.pl.
Frequently asked questions
Does Estonian CIT mean 0% tax?
Yes, but only as long as you do not distribute profits. When a dividend is paid, the company pays a lump-sum of 10% or 20%, and the shareholder pays additional PIT (reduced by a portion of the CIT). The combined effective rate is 20% or 25% — still lower than under standard CIT.
Can I switch to Estonian CIT mid-year?
Yes. You must close the books, prepare financial statements for the period up to the day before the switch, file the CIT-8 with the CIT/KW appendix, and submit the ZAW-RD notification by the end of the first month of the new tax year.
What happens if I exit before 4 years?
Early exit triggers the obligation to pay tax on the initial adjustment (transitional differences) and on profit earned during the Estonian CIT period. You can pay immediately or upon future distribution of the profit.
Can a single-shareholder sp. z o.o. use Estonian CIT?
Yes, provided the sole shareholder is a natural person. You still need to meet the employment requirement of at least 3 people (with an exemption for new companies in the first 3 years). Single-shareholder companies face a higher risk of hidden-profit issues in transactions with the owner.
Do I file a CIT-8 return under Estonian CIT?
Not in the traditional form. You file a CIT-8E return by the end of the third month after the tax year ends. You do not calculate taxable income — you only report events subject to the lump-sum tax (dividends, hidden profits, non-business expenses).
Did the planned changes to Estonian CIT take effect in 2026?
No. The draft amendment from September 2025 (broadening the definition of hidden profits, changing exit rules) was not adopted by the government before the end of 2025. The Estonian CIT rules in force in 2026 remain the same as in 2025.
Estonian CIT in 2026 is a genuine tax-saving tool — but it is not for every company. If you reinvest profits and do not plan regular distributions to shareholders, you can legally defer corporate income tax for years and lower the effective rate by 6–9 percentage points. If, however, you distribute all profit annually, have a complex ownership structure or many related-party transactions — standard CIT may turn out to be simpler and safer.
Want to check whether Estonian CIT makes sense for your company? Contact us at Progress Holding: +48 603 232 418 or office@progressholding.pl. We will run a tax simulation, assess the hidden-profit risk and handle the entire implementation process. We serve over 500 companies and have been helping businesses in Poland file their taxes correctly and on time for over 20 years.
