Czech tax residency: the two tests that decide where you owe tax

Picture someone who moves from Prague to Lisbon but keeps a flat in Vinohrady for visits. A Portuguese residence permit and tax number later, the Czech tax office may still regard that person as resident, because the flat is a home available here. Tax residency is one of those subjects where common sense and the law part company, and where the cost of being wrong arrives slowly.

This is an explainer on the Czech tests. It is not advice on any individual's situation. If you live between countries, ask a tax adviser who handles both of them.

Why residency matters

Residency decides how much of your income Czechia may tax. A Czech tax resident is liable on worldwide income, wherever it arises. A non-resident is liable only on income from Czech sources, such as wages for work done here, rental income from Czech property or dividends from a Czech company. The difference can be large for anyone with income abroad, such as a freelance contract paid from Germany or rent from a flat in Warsaw.

It also decides which allowances and credits you can claim, and how the annual return is organised. Our guides to employee income tax and to filing a personal tax return assume resident status.

The two domestic tests

The Income Tax Act (no. 586/1992 Coll.) sets two alternative tests for individuals, and meeting either one is enough.

The first is a permanent home (bydliště) in Czechia. This is a dwelling that you have available in circumstances showing you intend to live in it permanently, which is a question of facts, not a registration. A flat you own and keep furnished for your return, or rent long term, can count. A short hotel stay does not.

The second is habitual abode: staying in the country for at least 183 days in a calendar year. Days are counted in aggregate, not consecutively, and in practice any part of a day spent here counts. Two long stays that together pass 183 days make you resident for that year.

Companies have their own test. A company is tax resident in Czechia if its registered office or its place of effective management is here, so a firm registered abroad but managed from Prague can be resident on the second limb.

What residency is not

Three things are commonly confused with it.

Your registered address. The address in the population register (trvalý pobyt for citizens, a registered address for foreigners) is evidence that the authorities may weigh, not the test. Cancelling a registration does not by itself end tax residency, and having one does not by itself create it.

Your immigration status. A long-term residence permit does not decide tax residency, and a person without one can be a tax resident if they live here long enough. See our guide to long-term residence permits for the immigration side.

Social security. Which country's social security system covers you is decided by EU coordination rules, or by bilateral agreements outside the EU, and can differ from your tax residency. The social security guide explains the contribution side.

When two countries both claim you

Two countries can each apply their domestic tests and each conclude that you are resident. Double tax treaties then settle which one wins, using a tie-breaker based on the OECD model. In order, the questions are: where do you have a permanent home available? If both, where is your centre of vital interests, meaning your personal and economic ties? If that is unclear, where do you habitually live? Then nationality. If none decides, the two tax authorities settle it by agreement.

The consequence is that treaty residence, not domestic residence, decides which country has the main right to tax your income. You can be resident under Czech law and treated by a treaty as resident only of Portugal, say, for the purpose of that treaty. Our overview of double tax treaties says more about how treaties work.

A worked example

Take a consultant who rents a flat in Prague on a twelve-month lease and spends about four months of the year working from it, travelling the rest of the time. The 183-day test is not met. The permanent-home test may be, because the flat is available all year and is the only home the person keeps. If the person also has a family home abroad, the treaty tie-breaker would then ask about centre of vital interests. The numbers in this example are illustrative; the point is that days alone rarely settle the question.

The same logic works in reverse for a long-stay visitor with no home here, staying in hotels or short-term lets for seven months. There the 183 days decide, even though the person feels like a guest.

Arriving and leaving

Residency rarely starts or ends on the day you cross a border. Someone who arrives in September and takes up a flat may be resident from the moment the permanent home exists, even if the 183 days are not reached that year. Someone who leaves must think about when the home stops being available, whether the flat is let, and what ties remain. A move abroad is easy to describe and harder to prove.

Employees working across borders face a further rule in most treaties, a limit on days of presence below which the employment income may stay taxable only in the home country. The details, such as the period over which days are counted and who pays the employer's costs, vary between treaties, so read the one that applies.

Proving it

The Financial Administration issues a certificate of tax residency on request, which foreign tax authorities, banks and payers often ask for before applying a treaty rate. It confirms that you are treated as resident for a given year. The form is on the Financial Administration's pages, and the request goes through the portal or the data box. Apply early: payers abroad do not apply a reduced withholding rate on a promise.

Non-residents with mostly Czech income

Czech law includes special treatment for certain non-residents who earn nearly all their income here, so that they can claim some allowances as if resident. The conditions are specific and tied to EU or EEA residence (as of 2026; check the official source). If you live in Bratislava or Vienna and work in Prague, that provision is worth asking about.

Where people go wrong

They assume deregistering from the address register ends residency. They rely on a friend's rule of thumb that only 183 days count. They forget that a home available to them in Czechia matters even when they spend months abroad. They claim treaty relief without a residency certificate. And they treat tax, immigration and insurance as one question.

Frequently asked questions

If I spend fewer than 183 days here, am I automatically non-resident?

No. A permanent home available in Czechia can make you resident regardless of days.

Does cancelling my registered address end Czech tax residency?

Not by itself. The tests look at facts such as a home and days spent, not only registration.

How do I prove I am resident here to a foreign payer?

Request a certificate of tax residency from the Financial Administration.

Can I be resident in two countries at once?

Under domestic laws, yes. A treaty then decides which country treats you as resident for treaty purposes.

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