Determining tax residency is one of the key elements of proper personal income tax compliance in Poland, especially for individuals working abroad, moving between countries, or earning international income. In practice, many people associate tax residency solely with the 183-day rule. However, Polish tax regulations provide for additional criteria, which are often more important.

Tax residency - basic principles

Under Polish PIT regulations, an individual is considered a Polish tax resident if at least one of the following conditions is met:

• they have their centre of vital interests (personal or economic ties) in Poland,

• they stay in Poland for more than 183 days during the tax year.

Importantly, meeting just one of these conditions is sufficient. This means that even a shorter stay in Poland does not exclude tax residency if the individual’s personal or economic ties are primarily located in Poland.

Centre of vital interests - a key but not clearly defined concept

In practice, the most important factor is the so-called centre of vital interests, which is often more difficult to determine than the number of days spent in a given country. It includes both personal aspects (such as the place where one’s family lives, social ties) and economic factors (place of work, business activity, sources of income, or assets).

Assessing this criterion requires looking at the overall situation of the taxpayer, rather than focusing on individual elements in isolation. In practice, this means that a person working abroad may still be considered a Polish tax resident if their personal or economic life remains closely connected to Poland.

Tax residency in an international context

For individuals with ties to more than one country, it is possible to be considered a tax resident in two jurisdictions at the same time. In such cases, double taxation treaties apply.

These agreements introduce additional tie-breaker rules, which help determine the country of tax residency. In practice, the following criteria are analyzed in sequence:

• permanent home,

• personal and economic ties (centre of vital interests),

• habitual abode,

• and ultimately – citizenship.

Only such a multi-step analysis allows for the correct determination of tax residency in international situations.

Why is correct determination of tax residency so important?

Tax residency determines the scope of taxation. As a rule, a Polish tax resident is subject to taxation on their worldwide income, regardless of where it is earned.

In contrast, non-residents are taxed in Poland only on income sourced within the country. An incorrect determination of tax residency may therefore lead to underreporting income, double taxation, or disputes with tax authorities.

If you are unsure where you should report your income or how to determine your tax residency, it is worth approaching this issue carefully. Feel free to contact us – we will help you analyse your situation and identify the right solution.