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MOJE daně

online portal of the Financial Administration

What does “MOJE daně” mean in Czechia?

MOJE daně is the Financial Administration's online portal for submitting tax documents.

Three ways to submit your tax return electronically

the MOJE daně portal;
datová schránka (data box);
the Financial Administration's app.

🔑 Why electronic submission is better

For the year 2025, the deadlines are: paper — April 1, 2026, electronic — May 4, 2026. The extra month is only for the submission method.

🔴 But remember the main trap: the tax must be paid by the same deadline as the tax return is submitted. If you submit electronically on May 4, you must pay by May 4.

For OSVČ (self-employed status), it's not a choice, it's a duty

You opened a živnost (sole-trader licence) and got an IČO (company ID number) → you became OSVČ → your datová schránka (data box) is created automatically and is mandatory (from 01.01.2023), and with it comes a mandatory electronic tax return. The paper route is closed for you.

Important. 🔴 The data box has two dangerous mechanics: according to § 10, paragraph 2, the box activates itself on the 15th day after the login is delivered, even if the envelope is not opened; according to § 17, paragraph 4, there is a fiction of delivery – 10 days from the day of delivery. Together, this is ~25 days from sending the login, after which the document is considered delivered even if you do nothing, and the deadlines for appeal start running.

Examples of use

I submitted the tax return through the MOJE daně (MY taxes) portal.

I submitted the declaration through the MOJE daně (MY taxes) portal.

Electronic submission has a deadline of May 4.

Electronic submission has a deadline until May 4.

Frequently asked questions

Can I submit my tax declaration on paper as an OSVČ (Czech self-employed status)?

No. Together with your IČO (company identification number), you automatically received a data box, and with it, mandatory electronic tax returns. You will have to submit them through MOJE daně (MY Taxes), your data box, or the Financial Administration's application.

The deadline is May 4. Can I also pay the tax then?

Yes — but at the same time, not later. The tax is paid at the same time as the tax return is filed. The grace period is 5 working days.