964
15.09.2025
15Estonian CIT is becoming increasingly popular among Polish companies — more than 21,000 companies use it (Ministry of Finance data, January 2026). This tax system lets a company defer tax until profits are distributed, which gives a clear cash-flow advantage.
At the beginning of 2022 the rules of Estonian CIT in Poland were substantially liberalised, so a much larger number of companies could use this form of taxation. The number of companies choosing it rose from about 450 in the first year to as many as 15,000 in the second year. The conditions became more accessible, and this tax is now the most frequently chosen pro-investment option. In practice it mainly benefits companies that invest a lot and rarely distribute profits, with rates depending on the size of the company (10% for small taxpayers and 20% for larger companies — the nominal lump-sum rate).
This article explains how Estonian CIT works in practice, which conditions you must meet to use it, and how to avoid typical mistakes that can cost your company the right to this form of taxation.
Advantages and disadvantages of Estonian CIT in practice
The difference between standard CIT and the Estonian model is fundamental. Below are the advantages and disadvantages that can affect your business decisions.
No tax until profit is distributed
The main advantage of Estonian CIT is that taxpayers do not pay tax on current income. Only the part of the profit that is distributed to the shareholders is taxed. Under standard CIT, tax is paid regularly on the whole income, whether the profit is distributed or reinvested.
In practice the company does not have to pay monthly or quarterly income-tax advances. There is also no duty to prepare annual settlements in the traditional way — the tax charge appears only when the owners decide to distribute the profit.
Lower effective tax
The effective tax burden under Estonian CIT is 20% for small and start-up taxpayers and 25% for others. For a company taxed under the general rules the figures are higher — about 26% for small taxpayers and about 34% for others.
Lower rates leave more funds for the development of the business. For a small taxpayer under Estonian CIT the effective tax on a given profit is PLN 100,000 compared with PLN 130,000 under classic CIT.
Estonian CIT and cash flow
A key benefit of Estonian CIT is better cash flow. Funds that would otherwise go to tax can stay in the company and be used for investment, new equipment or expanding the scope of activity.
This gives more flexibility in budget planning and a faster response to market opportunities. Deferring the moment of taxation lets owners decide on a profit distribution only when the company has reached specific financial or staffing goals.
Estonian CIT — advantages and limitations worth knowing
Despite the advantages, Estonian CIT also has limits. First, only a closed list of companies may use it. General partnerships (spółka jawna) and companies whose shareholders are other companies cannot be taxed in this form.
The rules also require a company on Estonian CIT to employ at least 3 employees on an employment contract or 3 people on civil-law contracts. Hidden profits, which are taxable, can also be a problem. The definition is broad and may cover a lease with a shareholder or a contract of mandate with a shareholder's family member.
By choosing Estonian CIT the company must stay in this system for 4 years. Tax reliefs available under standard CIT cannot be used at the same time.
Estonian CIT conditions — who can use it?
To use Estonian CIT you must meet a set of conditions in the tax rules. Not every company can switch to this system, so it is worth checking carefully whether your company qualifies.
Required legal form
Estonian corporate income tax is available only for selected legal forms. You can use it if you operate as:
- a limited liability company (sp. z o.o.)
- a joint-stock company (S.A.)
- a simple joint-stock company (P.S.A.)
- a limited partnership (sp. k.)
- a limited joint-stock partnership (S.K.A.)
Other forms, including a sole proprietorship (JDG) or a general partnership, cannot choose this form of taxation.
Revenue limit and operating activity
A key requirement is the structure of your company's revenue. Less than 50% of revenue may come from passive sources, such as:
- receivables and interest
- income from loans
- interest portions of lease instalments
- sureties and guarantees
- copyright or industrial-property rights
- financial instruments
- transactions with related parties that do not create added value
For companies starting activity, the revenue-structure condition is treated as met in the first tax year.
Employment and ownership structure
You must employ at least 3 people who are not shareholders, on an employment contract, for at least 300 days in the tax year. Alternatively you may engage 3 people on civil-law contracts, but then monthly salary costs must be at least three times the average monthly wage in the enterprise sector.
For small taxpayers, in the first year of Estonian CIT it is enough to employ one person. Shareholders may only be natural persons — companies with corporate shareholders cannot use Estonian CIT.
Estonian CIT revenue limit — how to calculate it
The passive-revenue limit (less than 50%) is calculated against total business revenue of the previous tax year. Revenue is counted including the amount of VAT due.
Small-taxpayer status (revenue up to EUR 2 million) affects the Estonian CIT rate — small taxpayers apply 10%, others 20%.
Exclusions and limits
Estonian CIT cannot be used by:
- financial undertakings (banks, credit institutions, SKOK credit unions)
- lending institutions
- taxpayers operating in special economic zones
- companies in bankruptcy or liquidation
- companies created as a result of a merger or division
In addition, a company on Estonian CIT may not prepare financial statements under IFRS and may not hold shares in other companies.
How to switch to Estonian CIT, step by step
Switching to Estonian income tax requires a few formal steps. Below is a guide through the process.
Filing the ZAW-RD notification
The first step is to file the ZAW-RD notification with the competent head of the tax office. You must do this by the end of the first month of the tax year in which you want to apply Estonian CIT. The form can be filed electronically (e-Deklaracje or e-PUAP) or on paper. ZAW-RD requires a special authorisation PPS-1 or PPO-1 — it cannot be filed on the basis of a UPL-1 power of attorney.
Estonian CIT during the year — what to do
You can also switch to Estonian CIT during the tax year. In that case you must:
- settle classic CIT for the period before the change
- close the accounting books on the last day of the month preceding the change
- prepare financial statements
- file the ZAW-RD notification by the end of the first month in which you will use Estonian CIT
Financial statements and closing the books
The financial statements must be prepared under the Accounting Act within three months of the balance-sheet date. The document must bear a qualified electronic signature, a trusted signature or a personal signature. A missing signature on time means the choice of Estonian tax is treated as ineffective.
Estonian CIT — how to count tax periods
The lump-sum taxation covers four consecutive tax years indicated in the ZAW-RD notification. After that period it is automatically extended for another 4 years if you do not resign from this form of taxation.
The most common mistakes and risks in Estonian CIT
Companies using Estonian CIT often hit traps that can lead to losing this form of taxation. The most common mistakes are listed below so that they can be avoided.
Hidden profits and expenses unrelated to the business
One critical risk area is hidden profits — benefits connected with the right to share in the profit. They include:
- amounts of loans granted to shareholders
- interest on loans granted by shareholders
- shareholders' trips unrelated to the company's activity
- repairs of fixed assets owned by the shareholders
Expenses unrelated to the business are mainly penalties, fines and interest on late tax payments. Remember that 50% of expenses connected with cars used for mixed purposes is also taxed under Estonian CIT.
Incorrect calculation of the passive-revenue limit
A common mistake is an incorrect calculation of the passive-revenue limit, which must not exceed 50% of total revenue. Passive revenue includes income from receivables, interest, copyright and financial instruments.
A particular risk concerns IT companies: revenue from the transfer of copyright must be classified entirely as passive if the market value of those rights has not been separated. The limit is counted including VAT due.
Problems with employment and ownership structure
The requirement to employ at least 3 people who are not shareholders for 300 days a year is often breached. For civil-law contracts, monthly costs must be three times the average wage. People working on a B2B basis cannot be counted towards the employment requirement.
The right to Estonian CIT is also lost when other companies become shareholders or when your company acquires shares in other entities. This risk appears even on inheritance of shares or in restructuring proceedings.
Estonian CIT — booking costs, what to watch
Incorrect booking of costs can lead to tax problems. Use proper analytics for operating and financial costs so that expenses that are hidden profits or unrelated to the business can be identified easily.
Pay attention to the correct booking of 50% of the costs of cars used for mixed purposes. You do not have to exclude these costs from the accounting books — a proper record and timely payment of the tax (by the 20th day of the month following the month of the expense) is enough.
Conclusions: can your company save on tax?
Estonian CIT is an attractive alternative to the traditional tax system, especially for companies focused on growth and reinvestment of profits. By deferring tax until profit is distributed, the company can keep better cash flow and plan investments more effectively. Lower effective rates (20% for small taxpayers and 25% for others) also give measurable savings compared with standard CIT.
Before deciding to switch, analyse the specifics of your activity. Check whether the company meets all formal requirements — legal form, ownership structure, employment and the passive-revenue limit. Then assess whether the benefit of deferred tax outweighs the limits connected with hidden profits and the inability to use other tax reliefs.
Effective use of Estonian CIT also requires proper accounting preparation. Set up cost analytics that make it easy to identify expenses that may be hidden profits. This helps avoid the most common mistakes that can lead to losing the right to this form of taxation.
This form of CIT works best for companies that generate significant profits and plan to reinvest them rather than distribute them to shareholders. If your strategy assumes intensive growth and limited profit distribution, this form of taxation can bring real financial and competitive benefits.
We keep the company's books under Estonian CIT as part of accounting for limited liability companies If you want to check whether this form makes sense for your company at all — an accounting consultation.
