Almost 4 in 10 people we talk to have already asked ChatGPT or a similar tool. That is a sensible first step, but Czech tax rules change every year, the details are in Czech, and AI tools mix up countries. Here are the five answers we correct most often, with the rule that actually applies in 2026.
1. "Below 183 days in Czechia, you are not tax resident"
What AI says: stay under 183 days a year and you are not a Czech tax resident.
The rule: under Czech law you are a tax resident if you have your home (bydliště) here, meaning a permanent place to live that you intend to keep, or if you usually stay here at least 183 days in a calendar year. The home test comes first: someone who lives in their own Prague flat with their family is resident from day one, however much they travel. When two countries both treat you as resident, the tax treaty decides by looking at your permanent home, then the centre of your life (family, work, assets), and only then where you usually stay. The days are the last test, not the first.
More in tax residency: why the 183-day rule is not the whole story.
2. "An s.r.o. saves tax"
What AI says: a company pays less tax than an individual, so set up an s.r.o.
The rule: an s.r.o. pays 21% corporate income tax on its profit. When you take the profit out as a dividend, the company withholds another 15%. Together that is 32.85% of the profit, plus the costs of double-entry bookkeeping, a yearly financial statement and a corporate tax return. For an employee with side income or a freelancer living here, a company is rarely cheaper; it can make sense for other reasons, such as liability, partners or investors. Compare the numbers with salary or dividends? and the corporate tax calculator, and read paying yourself from your s.r.o.
3. "Your clients are abroad, so no VAT"
What AI says: invoicing foreign clients means Czech VAT does not apply.
The rule: a service invoiced to a business in another EU country has no Czech VAT on the invoice (the client accounts for it under the reverse charge), but it still brings obligations. A company or self-employed person who is not a VAT payer becomes an identified person (VAT-light) with the first such invoice, or when it buys a service from an EU business such as advertising or software. It must register, file VAT returns in the months concerned and EC sales lists. Full VAT registration follows once revenue passes 2,000,000 CZK in a calendar year. See VAT for an s.r.o.
4. "Put your dividends in your tax return"
What AI says: dividends are investment income, so declare them in your return and pay 15%.
The rule: dividends from a Czech company to a Czech tax resident are taxed with a final withholding tax of 15%, deducted by the company before payment. They do not go in your tax return, and you cannot claim the tax back. Dividends from foreign companies are different: they do go in your Czech return, with a credit for the tax withheld abroad under the treaty. See investments, ETFs, crypto and RSUs in your tax return.
5. "Employees never have to file a tax return"
What AI says: your employer handles your tax, so you never file.
The rule: that is only true when your Czech salary is your only income. You must file when, for example:
- you had other income above 20,000 CZK in the year: rent, investments, a side job, income from abroad;
- you had salaries from two employers at the same time;
- you had a salary from a foreign employer while tax resident here.
And even when you don't have to, filing can bring money back: tax credits the employer did not apply, mortgage interest, pension savings, a spouse with low income. See do I have to file a Czech tax return as an employee? and the tax refund estimate.
And always: the amounts are out of date
AI tools often quote limits from earlier years. For 2026, for example: the 23% tax rate starts above 1,762,812 CZK a year; the full VAT limit is 2,000,000 CZK per calendar year (it was 2 million per 12 months until 2024); the DPP agreement limit for insurance is 11,999 CZK a month; and the student credit and kindergarten credit (školkovné) only come back from 2027. Our pages and tools are updated for the current year.
Why Taxbot is different
Our own assistant, Taxbot, answers only from our guides, which we keep up to date, and shows the source for every answer. When the guides don't cover your question, or the answer depends on your own situation, it says so instead of guessing.
This guide is general information, not personal tax advice.
Related
- Tax residency: why the 183-day rule is not the whole story
- Do I have to file a Czech tax return as an employee?
- Paying yourself from your s.r.o.
- VAT for an s.r.o.
Official sources: Income Tax Act No. 586/1992 Coll., §2, §21, §36 and §38g (zakonyprolidi.cz); VAT Act No. 235/2004 Coll., §6 and §6g (zakonyprolidi.cz); Financial Administration (financnisprava.cz).
