"Should I register for VAT?" is one of the questions Czech sole traders ask most often. The answer is not simple, because it turns on what you do, who your clients are and how much VAT you pay on your own purchases. This article goes through the differences between being registered for DPH (value added tax) and not being registered — the legal duties, the effect on your prices, and the situations where registering actually pays.
When registration is compulsory
Under Section 6 of the VAT Act (Act No. 235/2004 Coll.), a taxable person becomes a VAT payer once turnover for the calendar year exceeds 2,000,000 CZK. Registration is then mandatory, and you must file the application within 10 working days of the day you crossed the threshold (since 2025).
Turnover counts the consideration for taxable supplies with the place of supply in Czechia — in other words, what you earn for services and goods supplied here. It does not include supplies exempt from VAT without the right to deduct, such as financial services or insurance activity.
Working out your turnover
Suppose you are a freelance programmer and your income for the calendar year looks like this:
- invoices to Czech clients: 1,800,000 CZK
- invoices to clients registered for VAT elsewhere in the EU (reverse charge): 400,000 CZK
- e-book sales through your own website: 50,000 CZK
Income under the reverse charge mechanism — services for a VAT-registered business in another member state — does not count towards the turnover, because the place of supply is in that other state. Your turnover is therefore 1,850,000 CZK, still under the two million. But it would take only one more sizeable project to cross the line.
When voluntary registration pays
Even below the threshold, registering voluntarily can work in your favour. There are three typical cases.
High input costs that carry VAT
If you buy goods or services with VAT on them — software, equipment, office rent — you cannot recover that VAT as a non-payer. You pay the full price including tax. As a registered payer you deduct the input VAT, which effectively cuts those costs by 21%.
For example: you buy a laptop for 30,000 CZK including VAT (a base of 24,793 CZK plus 5,207 CZK of VAT). As a non-payer you pay the whole 30,000 CZK. As a payer you deduct the 5,207 CZK, so the laptop costs you 24,793 CZK.
B2B clients who are themselves VAT payers
If your clients are mostly VAT-registered companies, the VAT on your invoice is neutral for them — they deduct it. Your net price stays the same and you gain the right to deduct your own input VAT. In this situation registering is almost always the better option.
A planned investment
Ahead of a large purchase — a car, an office refit, expensive equipment — it can be worth registering first so that you can deduct the VAT on it.
What changes once you register
Registration brings a set of new obligations. It is worth knowing what you are taking on.
Invoicing
As a VAT payer your invoices must carry the fuller set of particulars required by Section 29 of the VAT Act:
- your DIČ (tax ID) and the customer's DIČ, if the customer is registered
- the DUZP — the date of the taxable supply
- the tax base, the VAT rate and the amount of VAT
- the total including VAT
As a non-payer the requirements are lighter: your name, address, IČO, a description of what you supplied, the date and the amount. You do not state a DUZP, VAT rates or a split between base and tax.
The VAT return
A VAT payer files a regular VAT return, form DPHDP3. How often depends on turnover:
- monthly — turnover above 10 million CZK, and always in the year of registration and the following calendar year
- quarterly — turnover for the previous calendar year up to 10 million CZK, at the earliest from the second calendar year after the year of registration (Section 99a of the VAT Act)
The return is filed electronically by the 25th day of the month following the end of the tax period. The tax is due on the same day.
The control report
Since 2016 every VAT payer has also had to file a control report, form DPHKH1. It sets out the individual invoices in detail and allows the Financial Administration to cross-check them against your counterparties. It is filed monthly — or quarterly, for a sole trader who files the VAT return quarterly — by the 25th of the month.
The penalties are real: filing the control report late costs 1,000 CZK (filed late without being prompted), 10,000 CZK (filed within the substitute period after the tax administrator asks for it), 30,000 CZK (not filed in response to a request to change or add data) or 50,000 CZK (not filed even within the substitute period). For individuals and quarterly payers the three higher fines have been halved since 2023 — 5,000, 15,000 and 25,000 CZK.
Records and archiving
A payer must keep VAT records, retain every tax document received and issued for at least 10 years, and be able to produce them for the tax administrator on request.
Staying a non-payer: simpler, but not free
Not being registered is easier, and it has a price. Here are both sides.
Advantages
- No VAT return — no monthly or quarterly return, and no control report
- Simpler invoices — fewer mandatory particulars
- Less administration — no rates to track, no tax to calculate, fewer deadlines to watch
- An edge with consumers — you can quote end customers a price with no VAT on top, so 21% lower
Disadvantages
- No input VAT deduction — everything you buy costs you the VAT-inclusive price
- A drawback with B2B clients — a VAT payer cannot deduct anything from your invoice, so your service effectively costs them more
- The threshold to watch — you have to keep track of your turnover for the calendar year
The effect on your prices
The most important practical question is what registration does to your prices and your competitiveness. The answer depends entirely on who buys from you.
B2B clients (VAT payers)
For a VAT payer, the VAT on your invoice is neutral — they deduct it — so they compare prices excluding VAT. If you charge 1,000 CZK as a non-payer, that is the equivalent of 1,000 CZK excluding VAT to them. If you register, you invoice 1,000 CZK plus 210 CZK of VAT, so 1,210 CZK, and the client deducts the 210 CZK. The result for the client is the same 1,000 CZK. For you, though, registration is worthwhile, because you now deduct your own input VAT.
B2C clients (end consumers)
For end consumers, who are not VAT payers, VAT is a straight cost. If you charge 1,000 CZK as a non-payer, they pay 1,000 CZK. If you register and want to keep the same net income of 1,000 CZK, you have to invoice 1,210 CZK. Your service has become 21% more expensive for them. The alternative is to cut your margin and keep charging 1,000 CZK including VAT, in which case your net income falls to 826 CZK.
Side by side
The key differences in one place:
- The document — non-payer: a simplified invoice with no VAT information. Payer: a full tax document with the DUZP, the rate and the VAT.
- VAT return — non-payer: none. Payer: monthly or quarterly, by the 25th.
- Control report — non-payer: none. Payer: monthly, or quarterly for sole traders, by the 25th.
- Input VAT deduction — non-payer: not available. Payer: full entitlement.
- Price to B2B — non-payer: no VAT, which makes you effectively dearer for the client. Payer: base plus VAT, which the client deducts.
- Price to B2C — non-payer: no VAT, so cheaper. Payer: 21% on top, so dearer for the end customer.
- Administration — non-payer: minimal. Payer: significantly heavier.
How Taxorio handles both
Taxorio is built for either status.
If you are not registered
- a simpler invoice form, with no mandatory VAT fields
- invoices that carry every particular a non-payer is required to state
- the note "I am not a VAT payer" on the invoice
- income records, so you can watch the 2,000,000 CZK threshold
- a CSV book of income and expenses to support the tax return
If you are registered
- a full tax document with the particulars required by Section 29 of the VAT Act
- VAT calculated automatically at the 21% and 12% rates
- the control report (DPHKH1) exported as XML for EPO (PRO plan)
- the VAT return (DPHDP3) exported as XML (PRO plan)
- VIES checks on foreign VAT IDs for reverse charge
- records of documents received, with AI recognition, for the input VAT deduction
- a tax calendar with the VAT filing dates
Switching between the two in Taxorio is straightforward: change your VAT status in the settings and the invoice forms and available exports adjust themselves. Bear in mind, though, that the setting applies to the whole year: the app does not record the date of the change, so if you become a VAT payer part-way through a year, go through that year's figures with a tax adviser.
Deciding: register or not?
A short decision guide:
- Turnover above 2,000,000 CZK for the calendar year? Registration is compulsory; there is nothing to decide.
- Are most of your clients VAT payers (B2B)? Voluntary registration is probably worth it — the VAT is neutral for them and you get your input deduction.
- Are most of your clients end consumers (B2C)? Registration either makes you 21% dearer or eats your margin. Better not to register.
- Do you pay a lot of VAT on your own purchases? The higher the input VAT, the more registration saves. Work out the annual figure.
- Is a large investment coming? Consider registering before you buy, so you can deduct the VAT on it.
Whichever way you go, Taxorio will invoice correctly in both modes. You can try it at app.taxorio.cz — free, with no commitment.
For the particulars and a worked example of a non-payer's invoice, see Invoice as a non-VAT payer in 2026. If the threshold itself is what concerns you, see VAT limit 2026.
Taxorio scope: Taxorio provides invoicing and income/expense records for Czech sole traders. It is not full accounting or personalised tax advice. For an unsupported or unusual case, verify the treatment with a Czech accountant or tax adviser before filing.