IT professionals and programmers in Slovakia and the Czech Republic usually choose between operating as a sole trader and setting up a limited company (s.r.o.). With ordinary income and low costs the sole-trader route with flat-rate expenses typically wins; with higher profits and a need to separate risk a company makes more sense. The thresholds, however, differ between the two countries – especially for VAT and flat-rate expenses.
Sole trader or limited company?
In both countries most developers start as sole traders on a trade licence, because programming falls under a free trade that only requires a simple notification. The trade-off is the same on both sides of the border: a sole trader is cheap and simple to run but is personally liable for debts, whereas an s.r.o. separates that risk and looks more credible to larger clients.
The practical trigger for switching is a stable, higher profit where you want to keep part of the money in the company and limit personal liability. For a side-by-side view of the forms you can read our comparison of a single-member s.r.o. in Slovakia and Czechia.
Flat-rate expenses or real accounting?
This is where the two systems diverge. In Slovakia, a sole trader can claim flat-rate expenses of 60 % of income, capped at EUR 20,000 per year, plus paid social and health contributions. In the Czech Republic, the 60 % flat rate for a free trade is limited by an income ceiling of CZK 2 million, and many developers instead use the flat tax (paušální daň), a single monthly payment covering income tax and both contributions.
In both countries a sole trader can keep simple records, while an s.r.o. must keep full double-entry accounting regardless of size. That means more paperwork and usually an external accountant, which should be factored into any decision to incorporate.
How does VAT work with foreign clients?
IT is an area where VAT comes into play quickly even when you invoice abroad. The mandatory registration thresholds differ: in Slovakia it is EUR 50,000 of turnover in a calendar year (with immediate registration above EUR 62,500), while in the Czech Republic it is CZK 2 million over twelve consecutive months.
When you invoice a business in another EU state (B2B), you issue the invoice without VAT and the customer accounts for the tax under the reverse charge, with the supply reported in an EC Sales List; we walk through the mechanics in our guide on how to invoice abroad from a VAT perspective. The reverse also matters: buying services from the EU – cloud, SaaS tools or online advertising – triggers a registration duty even for a non-payer (Slovak §7a registration, Czech identified-person status under §6g), and you must self-assess the tax.
How much tax and contributions will you pay?
For a sole trader, contributions are often a bigger item than the tax itself, and both countries set a minimum monthly amount. The headline income-tax rates differ: a Slovak sole trader pays 15 % on business income up to EUR 100,000 a year, while a Czech sole trader pays 15 % with a 23 % rate on the part of profit above 36 times the average wage.
Example: if the same developer runs the business through a company, the profit is first taxed at the corporate rate (10 % up to EUR 100,000 of taxable income in Slovakia, 21 % in the Czech Republic) and the shareholder then pays dividend tax on the pay-out (7 % in Slovakia, 15 % in the Czech Republic). This two-step taxation is the key number to run before incorporating.
What can an IT contractor deduct?
Under a flat rate or flat tax you do not track individual receipts. If you keep real records or company accounts, the costs commonly accepted in IT include:
- a laptop, monitor, peripherals and other workplace equipment,
- software licences, development tools, hosting and cloud services,
- internet and a share of home-office or rent costs,
- professional literature, online courses, certifications and conferences.
Each item must relate to your business and be documented. For things also used privately (phone, car, internet) you deduct only the proportionate business share.
Which mistakes cost IT businesses the most?
The most common slip is not watching the VAT turnover – a well-paid project reaches the threshold faster than expected, and late registration brings penalties. The second is overlooking the registration duty when buying foreign services. A sensitive issue in both countries is disguised employment: invoicing a single client long-term while working under their instructions and inside their team can be reclassified as an employment relationship. Clean, continuously kept records are the best protection against all of these.
Not sure whether to stay a sole trader or set up an s.r.o. as a developer, and how to handle VAT with foreign clients?
FAQ
Is a flat rate better than real expenses for a developer?
Usually yes, because IT businesses tend to have low real costs. In Slovakia the flat rate is 60 % of income up to EUR 20,000 a year; in the Czech Republic it is 60 % capped by an income ceiling of CZK 2 million, with a flat-tax scheme as an alternative. Real expenses pay off only when you have significant costs such as expensive equipment or office rent.
When do I have to register for VAT if I invoice clients abroad?
Mandatory registration starts at EUR 50,000 of turnover per calendar year in Slovakia and CZK 2 million over twelve months in the Czech Republic. Separately, buying services from the EU (cloud, advertising) triggers a registration duty even for a non-payer, and you must self-assess the tax. B2B invoices to the EU are issued without VAT under the reverse charge.
When is an s.r.o. worth it for a developer?
Typically at a stable higher profit, when you want to separate business risk from personal assets or work with large clients who prefer a company. A company must keep full accounting and its profit is taxed twice – first at company level, then as dividend tax. Base the decision on a concrete calculation of tax and contributions in your situation.