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Tax calendar 2026

Complete overview of tax deadlines

All key tax deadlines for 2026 in one place. Filter by taxpayer type and category to see only deadlines relevant to you.

Note for employers

Monthly social insurance reporting and payment does not have one universal fixed date. For regular payroll it is tied to the payday, if no payday is set then no later than the last day of the following month, and for irregular income typically by the 8th day of the following month.

The monthly overview of withheld payroll tax advances is filed by the end of the calendar month following the month in which taxable employment income was paid. The date list below therefore shows only fixed deadlines that are not tied to an employer’s individual payroll cycle.

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January 2026

January 26

VAT return and control statement for December 2025

Filing the VAT return and VAT control statement for December 2025 (monthly VAT payers).

LLC (s.r.o.)
Sole trader (SZČO)
VAT
January 26

VAT return and control statement for Q4 2025

Filing the VAT return and VAT control statement for Q4 2025 (quarterly VAT payers).

LLC (s.r.o.)
Sole trader (SZČO)
VAT

February 2026

February 25

VAT return for January 2026

Filing the VAT return and VAT control statement for January 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT

March 2026

March 25

VAT return for February 2026

Filing the VAT return and VAT control statement for February 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT
March 31

Annual settlement of tax advances for 2025

Performing the annual settlement of income tax advances upon an employee’s request.

Employer
Income tax
March 31

Income tax return for individuals and companies for 2025

Standard deadline to file the 2025 income tax return. Extension by 3 or 6 months may be available.

Sole trader (SZČO)
LLC (s.r.o.)
Income tax
March 31

Payment of income tax for 2025

Payment of the 2025 income tax (if you are not using a filing extension).

Sole trader (SZČO)
LLC (s.r.o.)
Income tax

April 2026

April 27

VAT return for March 2026

Filing the VAT return and VAT control statement for March 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT
April 27

VAT return for Q1 2026

Filing the VAT return and VAT control statement for Q1 2026 (quarterly VAT payers).

LLC (s.r.o.)
Sole trader (SZČO)
VAT
April 30

Annual payroll tax report for 2025

Submission of the annual payroll tax settlement report.

Employer
Income tax

May 2026

May 25

VAT return for April 2026

Filing the VAT return and VAT control statement for April 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT

June 2026

June 25

VAT return for May 2026

Filing the VAT return and VAT control statement for May 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT
June 30

Income tax return (extension +3 months)

Deadline to file the income tax return when using the 3-month extension.

Sole trader (SZČO)
LLC (s.r.o.)
Income tax

July 2026

July 27

VAT return for June 2026

Filing the VAT return and VAT control statement for June 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT
July 27

VAT return for Q2 2026

Filing the VAT return and VAT control statement for Q2 2026 (quarterly VAT payers).

LLC (s.r.o.)
Sole trader (SZČO)
VAT
July 31

OSS – VAT return for Q2 2026

Filing the OSS return and paying the tax under the One Stop Shop scheme for Q2 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT

August 2026

August 25

VAT return for July 2026

Filing the VAT return and VAT control statement for July 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT

September 2026

September 25

VAT return for August 2026

Filing the VAT return and VAT control statement for August 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT
September 30

Income tax return (extension +6 months)

Deadline to file the income tax return when using the 6-month extension (foreign income).

Sole trader (SZČO)
LLC (s.r.o.)
Income tax

October 2026

October 26

VAT return for September 2026

Filing the VAT return and VAT control statement for September 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT
October 26

VAT return for Q3 2026

Filing the VAT return and VAT control statement for Q3 2026 (quarterly VAT payers).

LLC (s.r.o.)
Sole trader (SZČO)
VAT
October 31

OSS – VAT return for Q3 2026

Filing the OSS return and paying the tax under the One Stop Shop scheme for Q3 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT

November 2026

November 25

VAT return for October 2026

Filing the VAT return and VAT control statement for October 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT

December 2026

December 28

VAT return for November 2026

Filing the VAT return and VAT control statement for November 2026.

LLC (s.r.o.)
Sole trader (SZČO)
VAT
December 31

Payment of income tax advances for Q4 2026

Payment of quarterly income tax advances for individuals and companies.

Sole trader (SZČO)
LLC (s.r.o.)
Income tax

Important notice

This calendar is provided for guidance. Always verify current deadlines on the websites of the Financial Administration and the Social Insurance Agency. If a deadline falls on a weekend or a public holiday, it is shifted to the next working day.

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