Once a year, you’re obliged to do your tax return. In most cases, your employer will fill up and submit the forms for you.  There are some exceptions, though – in some cases, you’ll have to do it on your own. You can also choose to do it on your own because you prefer it that way or you have your own business. We would strongly recommend you to hire a registered tax adviser or accountant in case you do not want your employer to fill up the tax forms for you. The deadline to file a tax return in a paper form is April 1.

Income tax is 15% calculated from the gross salary and your employer automatically reduces your monthly tax for up to 2 570 CZK per taxpayer.

Further information and all the requested documents can be found here:

https://www.financnisprava.cz/en/tax-forms/forms-and-information/personal-income-tax