The lump-sum tax on company income, known as Estonian CIT, allows you to defer tax until the moment profit is distributed. Check whether your spółka meets the conditions and when this form is truly worthwhile.
Estonian CIT is one of the most widely discussed tax instruments available to Polish spółki. Its greatest advantage is straightforward: you pay tax only when you actually distribute profit from the spółka, not at the moment it is earned. In theory it sounds ideal — in practice many companies abandon this form after the first year because they did not anticipate the hidden obligations. In this article we explain who can use Estonian CIT in 2026, what conditions must be met upon entry and throughout the period, and what pitfalls to watch out for.
The lump-sum tax on company income — commonly known as Estonian CIT — is a system in which the tax base is not the income earned in a given year, but distributed income, i.e. income actually paid out to shareholders or allocated to other specified purposes. As long as profit remains in the spółka and is reinvested, CIT does not arise. The moment of taxation shifts to the point at which a decision is made on a dividend, covering losses from prior years, or an expenditure unrelated to business activity. The rates are: • 10% for small taxpayers and new companies (revenue up to EUR 2 million) • 20% for other spółki Additionally, when a dividend is paid the shareholder pays PIT, however under Estonian CIT they are entitled to a deduction — so the effective tax burden is lower than in the classical model.
Not every spółka can use this form of taxation. In 2026, the lump-sum tax on company income is available to: 1. Spółki z o.o., spółki akcyjne, proste spółki akcyjne, spółki komandytowe and spółki komandytowo-akcyjne. 2. Entities whose shareholders are exclusively natural persons (no shareholders that are companies or funds). 3. Spółki employing at least 3 people under employment contracts (or incurring equivalent expenditure on contracts of mandate). 4. Companies whose passive income (interest, licences, receivables from leasing) does not exceed 50% of total revenue. 5. Entities that do not hold shares in other spółki and do not own foreign permanent establishments. The spółka must file notification ZAW-RD with the US — no later than the end of the first month of the tax year from which it wishes to apply the lump-sum tax.
Choosing the lump-sum tax is only the beginning. Throughout the entire period of applying Estonian CIT, the spółka must continuously satisfy the entry conditions. Losing even one of them results in falling out of the system and the obligation to settle tax for the entire period. The most common reasons for losing the right to Estonian CIT are: • A change in the ownership structure — the addition of an entity that is not a natural person to the group of shareholders. • A drop in employment below the required minimum. • Exceeding the passive income threshold. • Acquiring shares in another spółka or establishing a foreign branch. In addition, the spółka is required to maintain accounting records in a manner that enables the separation of distributed and undistributed profit — which in practice means additional requirements for the accounting department or biuro rachunkowe.
Estonian CIT brings the greatest benefits to spółki that: • Plan to reinvest profits in the development of the company rather than distributing them annually as a dividend. • Operate in capital-intensive industries — manufacturing, technology, e-commerce — where the accumulation of funds is key. • Have a stable, uniform ownership structure composed of natural persons. • Want to simplify tax settlements and avoid monthly CIT advance payments. On the other hand, spółki that regularly pay dividends or those planning dynamic ownership changes (e.g. the entry of a VC fund) are unlikely to benefit from the Estonian model. In such cases, classical CIT or the tax transparency of a spółka komandytowa may prove to be a better solution.
Despite its simple premise, the lump-sum tax on company income conceals several significant pitfalls that catch entrepreneurs off guard. 1. Hidden profits — the regulations define in detail what constitutes taxable income beyond a dividend. This includes, among other things, loans granted to shareholders, expenditure on the private needs of shareholders, and inflated remuneration. 2. Opening adjustment — upon entering Estonian CIT, the spółka must carry out a so-called opening adjustment of temporary differences, which may generate a one-off tax liability. 3. JPK_CIT from 2026 — Estonian spółki are also subject to the obligation to submit the new JPK_CIT structures, which requires adapting accounting software. 4. No possibility of deducting losses from prior years — upon entering the Estonian system, the spółka loses the right to settle losses incurred before choosing the lump-sum tax. 5. Punitive exit from the system — if the spółka fails to meet the conditions, it must pay tax on the entirety of the profit earned during the Estonian period, together with interest.
In 2026, spółki using the lump-sum tax must take into account two additional obligations. First, JPK_CIT — the new structure for reporting accounting book data to the US — also covers Estonian taxpayers. This means the need to maintain records in a format compliant with the requirements of the Ministry of Finance and to transmit data on a regular basis. Second, shareholders of Estonian spółki remain subject to the health insurance contribution on their remuneration. The deferral of CIT itself does not affect ZUS obligations or the health insurance contribution calculated on the remuneration paid to the president or a member of the management board. These costs should be factored into the cost-benefit analysis before making the decision to choose the lump-sum tax.
Estonian CIT can be a very advantageous solution for spółki focused on reinvesting profits and with a stable ownership structure. However, the complexity of the conditions, the risk of hidden profits and the new JPK_CIT obligations mean that the decision to choose the lump-sum tax should be preceded by a thorough analysis. The Danexis team will help assess whether this form of taxation is right for your spółka, carry out the opening adjustment and ensure correct reporting. Contact us by phone at +48 780 760 666, write to kontakt@danexis.pl or visit us at ul. Braniborska 74/20 in Wrocław.