Filing a Czech tax return: who must, when and how

There are two kinds of people in Czechia: those who have never seen a tax return and those who file one every spring and talk about it as if it were weather. Which group you belong to depends on how you earn money, not on how long you have lived here.

Employees: often handled for you

If you are an employee with one employer for the whole year and no other taxable income worth declaring, your employer can do the annual settlement (roční zúčtování daně). You ask them to do it, usually by signing a form and handing it in by 15 February, and they recalculate your tax, apply reliefs you have claimed and settle any difference through payroll.

Our guide to taxes for young people and the explainer on gross vs net salary show how payroll tax works. Ask HR for the deadlines and the forms they need; they vary by company.

Who has to file yourself

You generally file your own return (daňové přiznání) in cases such as these:

• You are self-employed, with income from a trade licence or business.
• You have income from several employers at the same time, in some cases.
• You have other income above a legal threshold, such as from renting out property or from certain sales (as of 2026; check the official source for the threshold).
• You earned income abroad that is taxable in Czechia.
• You have income that was not taxed in the usual payroll way.

Some people file even when they do not have to, because the return lets them claim reliefs or a refund that the employer's settlement did not cover. That is a choice, not an obligation.

Whether Czechia taxes your foreign income depends on your tax residency; see Czech tax residency explained. The shape of freelance life is described in freelancing in Prague.

Deadlines

The tax year is the calendar year. Returns for a given year are due in the next spring, with three standard dates (as of 2026; check the Financial Administration).

Deadlines that fall on a weekend or holiday move to the next working day. Late filing can bring penalties, so ask for help early if you are close. The tax is generally due by the same date as the filing deadline that applies to you, so an adviser filing on 1 July means paying by 1 July too.

How to file

Most people file online. The Financial Administration runs an electronic filing system (EPO) and a taxpayer portal called Moje daně. You log in with an accepted electronic identity, such as a bank ID, a data box or a certificate. Paper filing is still possible with the official form.

The self-employed are separate

If you run a trade, you do more than one filing. As well as the income tax return, you submit overviews for health insurance and social security to the relevant insurers. Our health insurance explainer and the social security guide show what these systems are for. Many freelancers hire an accountant for this reason alone. If your income is modest, ask the Financial Administration and ČSSZ about the lump-sum tax regime too (as of 2026; check the official source).

Foreigners and first-year filers

If you arrived part-way through the year, your return covers the part of the year that matters for Czech tax. Your tax residency and treaty position affect what to declare. Keep your contracts, payslips, tenancy agreement and travel records.

If your first year is complicated, an adviser is worth the fee. Our guide to finding a tax adviser explains what to ask for and how to check someone's credentials.

Refunds and underpayment

If you overpaid during the year, you get a refund after filing. If you underpaid, you pay the difference. The tax office can ask questions after you file, and it can correct errors within certain time limits. Respond to letters promptly, and keep copies of what you submit.

Common mistakes

Assuming the employer handles everything when you also had other income. Missing the 1 April or 1 May date by a day. Forgetting to claim a relief with a deadline. Mixing up tax return and insurance overviews. Not telling HR about the annual settlement request in time.

Documents worth gathering

Before you sit down with the form, collect the income statement from each employer, a record of any other income, invoices and receipts if you are self-employed, and confirmations for the reliefs you plan to claim. Keep bank statements that show interest or foreign income. Doing this in a single sitting saves the second and third round of hunting for paper.

If you spot a mistake

Everyone gets something wrong at some point. If you notice an error after filing, a corrected return can be submitted (dodatečné daňové přiznání), and it is better to fix it yourself than to wait for the tax office to find it. Check the Financial Administration guidance for deadlines and how to do it, or ask your adviser.

Frequently asked questions

Do all employees need to file a tax return?

No. If you have one employer and no other income to declare, the employer can usually do an annual settlement for you.

What are the usual filing deadlines?

1 April on paper, 1 May electronically, and 1 July if an adviser files under a power of attorney lodged on time (as of 2026; check the official source).

Can I file online?

Yes. The Financial Administration offers e-filing and the Moje daně portal.

Do I need an accountant?

Not always. Freelancers and people with foreign income often find one helpful.

Today: look at last year's income. If it came from one employer, ask HR about the annual settlement. If it came from anywhere else, check whether you must file.

This is a general explainer, not legal or tax advice.