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Report earnings payment data comprehensively – avoid additional clarifications

4/3/2025

When you report earnings payment data comprehensively to the Incomes Register when paying wages, it reduces the need for clarifications and streamlines the work of both the employer and the data users.

Complementary data specifies earnings payment data

The earnings payment data reported to the Incomes Register is divided into mandatory and complementary data.

Complementary data is additional information in the earnings payment report. It is almost always related to mandatory information and mainly obtained from companies’ information systems.

Reporting complementary data is voluntary but recommended, as it promotes the easy use of data in the Incomes Register.

Why is complementary data needed?

Several organisations that use the data in the Incomes Register need complementary data to support their decision-making. If a piece of information has not been reported in the earnings payment report, the processing of a case may be delayed and entail requests for additional clarification to the employer.

Complementary data is necessary in situations such as:

  • Implementing the income earner’s statutory benefits, such as unemployment or sickness benefits
  • Determining customer fees
  • Performing the tasks of insurance providers

Examples of complementary data

Complementary data on an employment relationship includes the type and duration of the employment relationship, information related to the termination of the employment relationship, form of payment, part-time percentage, weekly working hours and professional title.

Information on employment relationships is needed in many contexts. For example, if an employee’s employment relationship ends during the probationary period, the reported information on the reason for the termination speeds up the processing unemployment benefit. Similarly, when a person is retiring, the pension insurance provider needs the end date of the employment relationship, which they can get directly from the earnings payment report, to grant old-age pension without delay.

Complementary data related to paid income include earnings period data, which is essential for calculating the amount of earnings-related allowance or other benefits.

Absence data includes the absence period and the cause of the absence. For example, if a sick leave begins in the middle of a pay period, it is important that the information is provided no later than the next wage payment so that the payer of sickness allowance receives the necessary information in time.

Read more about complementary data and how to report it: Reporting data to the Incomes Register: mandatory and complementary data in the earnings payment report

When should complementary data be reported?

There is no deadline for reporting complementary data, but it is recommended to report it simultaneously with the mandatory information. This allows all data users to access the data without delay.

If some complementary data, such as absence data, is not yet available at the end of a pay period, it can be reported with the next pay period.

Include complementary data in your established reporting practice

Include complementary data in your established reporting practice to ensure that all necessary information is reported on time along with wage payments. To avoid technical issues in data reporting, make sure your systems support the automatic reporting of complementary data.

The benefits are visible in our everyday work

  • Smoother payroll administration – Reporting complementary data reduces separate requests for clarification and reduces manual work.
  • Faster processing of benefits and decisions – Data users can make decisions quickly without further clarifications.
  • Better data utilisation – Public authorities and other data users receive all the necessary information at once.
  • Faster and smoother services for the public – Employees and benefit recipients receive decisions and payments without unnecessary delays.
Page last updated 4/3/2025