Your tax residency decides almost everything: whether the Czech Republic taxes your worldwide income or only your Czech income, which country gets to tax your salary, and which tax credits you can claim. It is worked out in two steps: first Czech law, then, if another country also claims you, the double tax treaty between the two countries.
Step 1: Czech law has two tests
Under the Czech Income Tax Act you are a Czech tax resident if you meet either of these tests:
- You have your home here (bydliště): a permanent place to live, in circumstances that show you intend to stay. Your family, your children's school, a job here and a lease all count. It does not matter whether you rent or own it, and even a hotel or short-term rental can count while you look for a long-term flat.
- You habitually stay here (obvykle se zdržuje): you are in the Czech Republic for at least 183 days in a calendar year, added up, not necessarily in a row.
So the home test comes first in practice. Someone who moves to Prague with their family in September, rents a flat and starts a job is Czech tax resident from that day, even though they spend fewer than 183 days here that year.
How the 183 days are counted
- Every started day counts, including the day you arrive and the day you leave.
- The days are added up within one calendar year, 1 January to 31 December, not any 12-month period.
- The tax office looks at real presence: bank statements, travel tickets, accommodation, your own records. The dates on your visa or residence permit, and where you pay social or health insurance, do not count as proof.
- If you pass 183 days, you are resident for the whole calendar year, from 1 January, even for the months before you arrived.
One exception: people who are here only to study or for medical treatment do not become resident by staying here. As soon as they also work or run a business here, the normal tests apply.
Step 2: when two countries claim you
Many expats are resident in two countries at the same time under each country's own law: here because of their Czech flat, and at home because they kept a house or a family there. Then the double tax treaty between the two countries decides, with "tie-breaker" tests applied one by one. The first test that gives a clear answer settles it:
- Permanent home: if you have a permanent home available in only one country, you are resident there.
- Centre of vital interests: if you have a home in both, where your personal and economic ties are closer: your partner and children, your work, your social life, your property and investments.
- Habitual abode: if that is unclear, where you actually spend more of your time.
- Nationality: if you live in both equally, your citizenship.
- If even that does not decide, the two tax authorities agree between themselves.
Each treaty has its own wording, so the actual treaty with your country always has to be checked. The days only come third in this list: a person with their only home and family in Prague is Czech resident under the treaty even if they travel for work most of the year.
The year you arrive or leave
If you only meet the home test, your Czech residency starts on the day you set up your home here and ends on the day you give it up. That year is a split year: the Czech Republic taxes your worldwide income for the resident part, and only your Czech income for the rest. A treaty can split the year in the same way when you move from one country to the other.
If you meet the 183-day test, you are resident for the full calendar year, both in the year you arrive and in the year you leave. The treaty then decides which country may tax which income in each part of the year. See your first Czech tax return and leaving the Czech Republic.
What residency means for you
| Czech tax resident | Non-resident | |
|---|---|---|
| What is taxed here | Your worldwide income | Only income from Czech sources |
| Income from abroad | Goes in your Czech return; the treaty prevents double tax | Not declared here |
| Tax credits | All, such as the taxpayer credit of 30,840 CZK a year, children and spouse | The taxpayer credit; the others only if at least 90% of your worldwide income is Czech and you live in the EU or EEA |
How income from abroad is then taxed, and how you avoid paying twice, is explained in foreign income and double tax treaties.
Proving your residency
A foreign tax office, bank or pension fund often asks for proof that you are tax resident in the Czech Republic. The Czech tax office issues a certificate of tax residency (potvrzení o daňovém domicilu) on request, either under Czech law only or with reference to a treaty. The other way round, a certificate from your home country helps the Czech tax office accept that you are not resident here. The burden of proof is on you, so keep travel records, leases and contracts.
Common mistakes
- Counting days and ignoring the Czech flat, partner and job.
- Thinking the residence permit decides tax residency. It does not: immigration status and tax residency are separate questions.
- Leaving a foreign salary or rent out of the Czech return "because tax was already paid there". As a resident you declare it, and the treaty decides how double tax is avoided.
- Assuming you stop being resident the day you leave, while you were here more than 183 days that year.
More about residency and the tax benefits that come with it: tax residency and tax benefits on tradelicense.cz. Quick general questions: ask Taxbot.
Related
- Foreign income and double tax treaties
- Moving to Czechia mid-year: your first Czech tax return
- Leaving Czechia: final tax return, health insurance and what to cancel
- Americans in Czechia
- Your Czech personal income tax return
This guide is general information, not advice on your own situation.
Official sources: Act No. 586/1992 Coll. on income taxes, § 2; Financial Administration, methodological information on determining the tax residency of individuals (2026); OECD Model Tax Convention, Article 4.
