Tax number register

The tax numbers of people working at a shared construction site must be listed in the public register of tax numbers.

You can use the public register to check that the names and tax numbers printed on the name tags of the people working at the site are on the Tax Administration’s register. In addition, the employer or the provider of the name tag can use the public register to ensure that the tax number given by the worker matches the one in the register.

Entry into the tax number register must be requested separately

Even if a worker has a tax number, they are not automatically listed in the register of tax numbers.

Registration can be requested by

  • the worker
  • the employer
  • the project supervisor at the construction site

In addition, the Tax Administration may also enter individuals in the register on its own initiative.

If you have a Finnish personal ID

You can request that your tax number be entered in the public register.
Call the service line for tax numbers 029 497 070 (standard call rates) or visit a Tax Administration office.

If you do not have a Finnish personal ID

Visit a tax office in person in order to receive a personal ID and a tax number. After you have a personal ID, you can request that your tax number be entered in the public register.

You can ask the Tax Administration to register a tax number in the Ilmoitin.fi e-service.

  • Tax numbers are only listed in the public register automatically if you use the e-service to request tax numbers for at least 20 workers.
  • You can also make the registration request before the workers are in the tax number register, if you already have the tax numbers.

You can also register a tax number by calling the service number 029 497 070 (standard call rates) or by visiting a Tax Administration office.

Specifications - Direct data transfers and other e-filings > Requests for individual tax numbers.

Removal from the register

Workers can ask for their records to be removed from the public register of tax numbers. The worker must provide a statement that they no longer work in construction. For example, the worker may have moved on to work for an employer outside the construction industry.

The Tax Administration may also remove a worker from the register if no employee details have been filed for the worker in the past 2 years. The Tax Administration does not send the worker any notifications of the removal. If necessary, workers can be re-registered with the same tax number.

The worker’s employer or some other party who had originally asked for the worker to be entered in the register cannot ask for them to be removed. Every employer has their own identifiers that the tax numbers are registered to, but each tax number is personal to each worker. Therefore, the employer or the construction site’s main contractor cannot have the right to request a worker’s removal from the register. Only the worker can determine whether they wish to remain in the register even if their work in construction ends.

Check the register of tax numbers

Check the registration with the employee’s name and tax number

The tax number register is a public and open register in the construction sector. You must enter the person’s full name (first name and last name) and tax number into the register.

The search result shows whether the person is listed in the register with the tax number you entered. Just the name or the tax number is not enough – first name, last name and tax number are all required. The search result shows whether the name and the tax number match. The search result does not have any additional information, such as the individual’s personal ID.