Application for using the technical interface

An organisation that uses the technical interface of the Incomes Register needs a certificate available from the Incomes Register’s certificate service. Such a certificate is used to authenticate an organisation reporting income data or using data reported to the Incomes Register. Additionally, the integrity of records is ensured with a certificate. Certificates are issued in accordance with the purpose of use.

 Using the technical interface has three stages:

1. The authorised signatory of the organisation fills in the application for using the technical interface in the Incomes Register's e-service.

2. The authorised signatory of the organisation subscribes for a certificate in the Incomes Register's e-service.

3. The certificate's technical contact person, specified on the certificate subscription, retrieves the certificate from the Certificate service's technical interface

Who should apply for using the technical interface?

The certificate is required by a company or an accounting firm that uses payroll software from which the technical interface has been established between the Incomes Register and the system. Applications for using the technical interface can only be made by an authorised signatory of the organisation applying for a certificate, i.e.

Applications for using the technical interface can be made by the organisation's authorised signatory who has the right to sole representation. An authorised signatory can make an application for the certificate only if the authorised signatory has been granted the necessary right to sole representation in the organisation's signature clause.

If the application is made by an accounting firm or other outsourcing partners, it must have a valid contract and the authorisation to act on behalf of its customer. The accounting firm can use the same certificate to act on behalf of all of its clients. Different software within an accounting firm or company can use the same certificate for different programs, if the same type of certificate is compatible with the requirements of the different programs. Alternatively, an accounting firm or company can obtain a separate certificate for each software. The purpose of use of the certificate must be stated on the application for using the technical interface.

How is an application for using the technical interface submitted?

An authorised signatory of the organisation submits an application for using the technical interface via the Incomes Register's e-service.

You can sign in to the Incomes Register's e-service using online banking codes, a mobile certificate or a certificate card.

Please indicate the following on the application

  • the purpose of use of the interface and certificate
  • the services and channels the applicant intends to use
  • the details of the certificate's technical contact person (name, email address and telephone number).

Also indicate whether your organisation will report data to the Incomes Register on its own behalf or on behalf of another party.

On the application, the authorised signatory must accept the terms and conditions and information security requirements.

After this, the authorised signatory subscribes for the certificate in the Incomes Register's e-service. Based on the information given on the application, the organisation's designated technical contact person for the certificate will receive instructions on retrieving the certificate.

Incomes Register certificate 

Replacement application

A replacement application is made when changes or corrections are made to the original application, for example, due an error in the original application.

Make a replacement application in the following situations

  • changing the original application (e.g. deployment of a new channel). Enter all the channels you wish to use, including those that are already valid, in the application
  • correcting an error in the original application (a wrong channel was requested).

Example of accounting firms applying for certificates

Accounting firm A, which has the following customers:
Customer 1 Oy
Customer 2 Oy
Customer 3 Oy

Accounting Firm B, which has the following customers:
Customer 2 Oy
Customer 4 Oy, wants to make record subscriptions itself

An authorised signatory of the accounting firm submits an application for using the technical interface via the Incomes Register's e-service and retrieves a single certificate.

In conjunction with obtaining a certificate, a representative of the software house, for example, can be designated as the technical contact person who will, in practice, retrieve the certificate on behalf of the accounting firm. In practice, the certificate can be generated for the accounting firm by the party whom the authorised signatory of the accounting firm has named as the technical contact person.

Customer 2 Oy’s payrolls are managed by Accounting Firm A and Accounting Firm B. Both accounting firms have their own certificates and handle transactions on behalf of their customers normally, as agreed with Customer 2 Oy.

Customer 4 Oy wants to make record subscriptions itself, but with Accounting Firm B reporting wages. Customer 4 Oy can use the e-service for record subscriptions, or obtain its own certificate. Accounting Firm B has its own certificate, which is used in reporting.

If Customer 4 Oy uses the e-service to make a record subscription, the required persons must be authorised to use the e-service, via either the Suomi.fi e-Authorisations service or the Katso service.

Read more about the certificate