Poland’s Estonian CIT: an increasingly attractive option for domestic and foreign investors

Poland’s Estonian-style corporate income tax (CIT) regime has become an increasingly popular choice among taxpayers. Introduced in 2021 and significantly liberalised in 2022, the system has already been adopted by over 20,000 companies operating in Poland.

The Estonian CIT offers a compelling alternative to the traditional concept of corporate taxation, where profits are taxed on a current basis, regardless of whether they are retained or distributed. Under the classical model, tax liability arises as soon as income is earned by the company.

In contrast, the Estonian CIT is built on a distribution-based taxation model, in which tax is payable only at the moment profits are actually distributed to shareholders. As long as profits remain within the company, no tax obligation arises. This creates significant advantages for long-term capital accumulation and investments. Importantly, the deferral of tax payment is maintained even if the company decides to opt out of the Estonian CIT model.

Following the 2022 amendment, several of the previously strict entry requirements were removed or simplified and the effective tax burden was reduced. These changes made the Estonian CIT regulations considerably more accessible and attractive, particularly to small and medium-sized businesses.

The Estonian CIT is not limited to Polish resident investors. Foreign individual investors are equally entitled to benefit from this taxation model, provided they operate through a Polish corporate vehicle. No distinction is made based on the investor’s country of origin – whether the US, EU member states, or other jurisdictions – as long as the investment is carried out through a Polish CIT payer, such as a limited liability company (sp. z o.o.), limited partnership (sp.k.), or joint-stock company (S.A.).

The benefits of the Estonian CIT regime are not limited to the corporate level. One of its key advantages lies in the preferential tax treatment of dividends distributed to shareholders. Polish tax regulations allow shareholders to deduct 90% or 70% of the CIT previously paid by the company applying the Estonian CIT. The level of this deduction depends on the scale of the company’s operations, with smaller entities generally entitled to a 90% deduction and larger ones to a 70% deduction.

Foreign shareholders who are not subject to Polish personal income tax (PIT) may still benefit from the Estonian CIT regime, as the deduction can be applied to the withholding tax (WHT) levied on dividends. In such cases, the tax relief is effectively implemented by lowering the WHT payable on dividend distributions, rather than through a PIT deduction.

This means that the standard WHT rates provided under double tax treaties (DTTs) – typically 5%, 10%, or 15% – are significantly reduced in practice, depending on the applicable deduction level (90% or 70%) linked to the company’s size.

However, it is important to note that when the total amount of dividends paid to a single foreign shareholder exceeds PLN2 million in a given tax year, the Polish WHT regime triggers a ‘pay and refund’ mechanism. Under this procedure, the domestic WHT rate of 19% must be initially applied at source, with the possibility of claiming a refund based on the reduced DTT rate.

The tables below summarise the effective WHT rates depending on taxpayer size and the amount of distributed dividends.

Table 1: Effective WHT rates – small taxpayer

Standard DTT WHT rate	Effective WHT rate (dividend ≤ PLN2 million)	Effective WHT rate (dividend > PLN2 million)*
5%	0%	10%
10%	1%	10%
15%	6%	10%

* Assuming application of the pay and refund mechanism

Table 2: Effective WHT rates – large taxpayer

Standard DTT WHT rate	Effective WHT rate (dividend ≤ PLN2 million)	Effective WHT rate (dividend > PLN2 million)*
5%	0%	5%
10%	0%	5%
15%	1%	5%

* Assuming application of the pay and refund mechanism

As shown, the Estonian CIT model enables a significant reduction of WHT burdens in Poland, often allowing investors to effectively avoid WHT. Importantly, the relief does not affect the investors’ obligation to pay dividend tax in their country of residence.

The Estonian CIT model represents a strategic shift in corporate taxation – moving away from immediate profit taxation towards a cash-based, deferred system that rewards reinvestment and long-term value creation. Its design makes it well suited to both Polish entrepreneurs and foreign investors seeking to minimise corporate and shareholder-level taxation in a compliant, transparent framework.

The Estonian CIT mechanism not only allows for the deferral of taxation on company income but also reduces WHT charges in the event of dividend payments. In some situations, the effective WHT rate may be 0%.

With over 20,000 companies already applying the regime and growing international interest, Poland’s Estonian CIT has become a credible and efficient tax planning solution – one that merits serious consideration in cross-border structuring.