Generally, foreigners considered tax residents are subject to income tax on their worldwide income (dependent upon the double-taxation treaty policy that may exist between the Czech Republic and their country of origin), and non-resident foreigners are subject to income tax only on their Czech source income.

Foreign nationals who have a permanent home in the Czech Republic or who stay in the Republic for more than 183 days per year are considered to be tax residents, and are, as a rule, taxed on their worldwide income.

In the following situations a foreigner is liable for Czech source income tax regardless of the number of days per year spent in the Republic:

- When employed by a Czech company or branch thereof - When his/her salary is paid directly by or subsequently charged to a Czech permanent establishment - When holding the position of Member of the Board of Directors or on the Supervisory Board of a Czech registered company - When conducting business as a private entrepreneur

If a non-resident foreigner is employed by a non-Czech company and works in the Czech Republic for less than 183 days in a year, then that employee is not usually required to pay Czech income tax even though his/her income was earned inside the Republic.

It is always advisable to consult an international tax specialist prior to seeking employment abroad.