Invoicing Czech clients — what you need to include

A quick guide to getting your invoices right when billing Czech companies or customers.

Why it matters

Czech companies care about correct invoices. If your invoice is missing required information, your client may ask you to fix it — or their accountant will. In some cases, an incorrect invoice can cause tax complications for both sides. Getting it right from the start saves time and looks professional.

Do Czech rules apply to you?

It depends:

  • You have a Czech company or VAT registration — yes, Czech invoicing rules apply
  • You’re invoicing from abroad (no Czech entity) — your home country’s rules apply, but your Czech client still needs certain information for their records
  • You’re registered for Czech VAT but based elsewhere — Czech VAT invoice requirements apply

When in doubt, include more rather than less. Czech accountants will thank you.

Required information on Czech invoices

For a standard invoice (faktura) issued by a Czech-registered business:

Seller details

  • Business name
  • Address
  • Company ID (IČO) — 8-digit identification number
  • VAT ID (DIČ) — if VAT registered (format: CZ + number)

Buyer details

  • Business name
  • Address
  • Company ID (IČO) and VAT (if applicable)

Invoice basics

  • Invoice number (unique, sequential)
  • Issue date
  • Due date
  • Date of taxable supply (datum uskutečnění zdanitelného plnění) — often the same as issue date, but not always

What you’re charging for

  • Description of goods or services
  • Quantity and unit price
  • Total amount

VAT details (if applicable)

  • VAT rate(s) — standard 21%, reduced 12%, zero
  • VAT amount
  • Total with and without VAT

Payment information

  • Bank account number (IBAN for international)
  • Payment reference or variable symbol (variabilní symbol) — a number your client uses to identify the payment

The variable symbol (variabilní symbol)

This is a Czech specialty. It’s a numeric code (up to 10 digits) that identifies the payment — usually the invoice number or a client reference.

Czech companies use it to match incoming payments to invoices. If you don’t include one, their accountant may ask for it.

Simple solution: use your invoice number as the variable symbol.

VAT invoice vs. regular invoice

If you’re VAT-registered in Czechia, invoices over a certain threshold need to be “daňový doklad” (VAT invoice) with all VAT details.

For smaller amounts or non-VAT-registered businesses, a simplified invoice may be enough — but including full details never hurts.

Language

No legal requirement for Czech language on invoices. English is fine, especially for international transactions. But if you’re regularly invoicing Czech clients, having at least the key terms in Czech (or bilingual) makes their accountants’ lives easier.

Currency

You can invoice in any currency. EUR and USD are common for international work. Just note that Czech accounting converts everything to CZK for tax purposes. Your Czech clients may prefer CZK if it simplifies their bookkeeping.

Common mistakes

  • Missing Company ID or VAT# — Czech accountants need these for their records
  • No variable symbol — client can’t easily match payment
  • Wrong or missing date of taxable supply — matters for VAT reporting
  • VAT errors — wrong rate, missing VAT number, or charging VAT when you shouldn’t

Sample invoice structure

INVOICE / FAKTURA-DAŇOVÝ DOKLAD
Invoice number: 2026-123
Issue date: 15.1.2026
Date of taxable supply: 15.1.2026
Due date: 14.2.2026

Seller:
Your Company s.r.o.
Street 123, 110 00 Prague
IČO: 123456789
DIČ: CZ123456789

Buyer:
Czech Client a.s.
Another Street 456, 120 00 Prague
IČO: 987654321
DIČ: CZ987654321

Description              Qty     Unit price     Total
Consulting services       10 hrs     €80        €800

Subtotal (without VAT):    €800
VAT 21%:                   €168
Total:                     €968

Payment:
IBAN: CZ65 0800 0000 0012 3456 7890
Variable symbol: 2026123

If you’re invoicing from outside Czechia

Your invoice follows your country’s rules, but make sure to include:

  • Your VAT number (if applicable)
  • Client’s IČO and DIČ
  • Clear description of services
  • Note about VAT if relevant (e.g., “reverse charge” for EU B2B)

Your Czech client may need this for their VAT reporting.

Not sure if your invoices are correct?

We can review your setup and make sure everything is in order for Czech clients.

Get in touch

Footer note:
This guide covers common situations. VAT rules are complex — for specific cases, consult a tax advisor.