The year 2026 brings a fundamental change that will affect every employer in the Czech Republic—the introduction of the Unified Monthly Employer Report (JMHZ). This is the most significant modernization of reporting obligations to the state in the last decade. The goal is to simplify administration, unify data, and eliminate dozens of duplicate reports that companies had to submit to various institutions every month.

JMHZ represents a new way for employers to mandatorily and regularly share data about themselves and their employees—electronically, by a single deadline, in one place, and in a standardized format.

What is JMHZ?

The Unified Monthly Employer Report is a new electronic system for mandatory reporting of data on employers and their employees. It was established under a separate law that defines, organizes, and sets out the obligations of this new administrative tool.

With a single monthly report, employers will replace up to several dozen different submissions that were previously sent to the Czech Social Security Administration, the Ministry of Labor and Social Affairs, the Labor Office, the Financial Administration, or the Czech Statistical Office.

The main goal is more efficient use of government data, less paperwork, and a unified flow of information between businesses and public administration.

Why is JMHZ being introduced?

Until now, employers had to submit a number of different registration and insurance reports every month. Some contained duplicates, while others had different deadlines, structures, and definitions of terms. This created a heavy administrative burden and often led to errors and inaccuracies in practice.

JMHZ is intended to provide:

• a single central location for all data,
• a single monthly electronic form,
• fewer errors caused by data duplication,
• simpler communication with the government,
• faster and more accurate data processing,
• the foundation for the future full digitization of employment and tax administration.

Looking ahead, the government anticipates, for example, that thanks to the JMHZ, it will be possible to offer employees pre-filled tax returns or faster processing of social benefits and sick pay.

When will the JMHZ be implemented?

The implementation of the JMHZ will take place in three main phases:

January 1, 2026 – the law takes effect

Employers must begin recording the necessary data in the new structure.

January 1 – March 31, 2026 – transition period

During this time, the JMHZ is not yet submitted, but it is necessary to prepare employer and employee records, update payroll systems, and enter all required data.

April 1, 2026 – Full implementation

Starting in April, employers have a new obligation:

• submit the JMHZ report every month,
• retroactively submit reports for January, February, and March 2026 between April 1 and June 30, 2026.

The first quarter is therefore critical for properly setting up processes.

Who is affected by the JMHZ?

The JMHZ applies to virtually all entities that pay income from employment. Specifically:

• employers with employment contracts,
• entities paying remuneration under DPP/DPČ agreements,
• companies and self-employed individuals, even those with a single employee,
• homeowners’ associations paying compensation to chairpersons or members of governing bodies,
• entities paying remuneration to executives or members of statutory bodies.

This does not apply to self-employed individuals without employees.

What will be included in the JMHZ?

The JMHZ consists of three basic parts:

1) Summary section

Contains identification information about the employer.

2) Insurance section

It lists the total amount of insurance premiums paid by the employer.

3) Individualized section

Contains data on each employee individually—type of employment relationship, duration, employment identification, income, insurance premiums, and other required information.

Thanks to the standardized structure, all authorities receive the same high-quality data, eliminating the need for duplicate filings.

How can an employer prepare for JMHZ?

1) Check your employee records

It is necessary to verify that all your employees are correctly registered with the Czech Social Security Administration (ČSSZ). Any discrepancies would cause errors in reports after the JMHZ goes live.

2) Update your payroll software

JMHZ introduces new data structures that must be implemented into your payroll system.

3) Add employer and employee information

New identifiers for employment relationships and employees will be required.

4) Set up internal processes

It is necessary to clearly define responsible persons and workflows:
HR → Payroll → Review → Submission.

5) Set up control mechanisms

Submissions are sent without the option to amend them later. Incorrect submissions may be rejected as invalid.

What penalties apply?

Failure to submit the JMHZ by the deadline or submitting an incorrect form may be classified as a misdemeanor. Forms with significant errors may be rejected entirely, meaning the obligation will not be fulfilled and authorities may initiate penalty proceedings.

What practical benefits will the JMHZ bring?

Although the first few months will be challenging for employers, the long-term benefits are clear:

• a significant reduction in the number of forms,
• standardization of deadlines and formats,
• faster and more accurate data sharing,
• better control over employment records,
• fewer errors caused by manual data entry,
• more efficient communication with the government.

In the long term, this is a step toward the complete digitization of the relationship between the government, employers, and employees.

Conclusion

The unified monthly employer report is a milestone in the modernization of HR and payroll administration. For the first time, the government is introducing a unified system that will standardize reporting for all key institutions. And although implementation will require preparation, the result will be simpler and more efficient management of employee data.

Companies that prepare for the change in time—by updating their software, adjusting their processes, and providing the required data—will have a head start starting in April 2026 and will avoid unnecessary complications.