How to register as a taxpayer, an aid recipient or a small producer

If you have activities subject to excise taxation that require registration as a taxpayer, an aid recipient or a small producer under the act on excise duties (Valmisteverotuslaki 182/2010), submit a registration notification to the Tax Administration. The Tax Administration issues an appealable decision on the registration. 

You can submit the registration notification to the Tax Administration in MyTax 

Go to MyTax  

Who must file a registration notification and an excise duty return?

Some parties have to submit only a registration notification to the Tax Administration. Others must also file an excise duty return for each tax period following the registration.

The following parties must submit a registration notification and excise duty returns:

  • natural gas network operators
  • producers of biofuel oil
  • users of fuel peat and users of tall oil
    • power plants and heating plants, when heat produced with peat exceeds
      5,000 MWh a year
    • industrial producers using tall oil for heating
  • electricity network operators
  • electricity producers
  • small electricity producers
  • landfill operators
  • State aid recipients using coal, natural gas, fuel oil, biofuel oil, LPG, bio-LPG or heavy fuel oil in combined production of electricity and heat.

  • Note: A party using natural gas for tax-exempt purposes can register as a registered natural gas user. However, registration is not mandatory.

See filing deadlines: How to file an excise duty return


The following parties must submit a registration notification but no excise duty returns:

  • small producers of beverage containers
  • small producers of soft drinks
    • after registration, small producers must file an estimate of their annual production volume by the end of January every year
  • State aid recipients using electricity of tax category II in industry or data centres.

When must the registration notification be filed?

The registration notification must be filed before the activities subject to excise duty begin.

Registration at the authority’s initiative

Registration can also be done at the authority’s initiative if the Excise Duty Act prescribes the obligation to register but the obligated party has not filed a registration notification.

Time of registration

Taxpayers are entered in the register as of the date when their activities subject to excise duty begin.

Aid recipients and small producers are entered in the register as of the date when their activities qualifying for the aid begin. However, aid recipients and small producers cannot be registered retroactively: the start date of registration cannot be earlier than the date of registration decision.

If the company’s activities change during the tax period

If the details given in the registration notification change or if the activities requiring registration end, you must inform the Tax Administration without delay. File a report as soon as you know the date of change or date of termination. At the latest, you must file the report during the day when the activities change or end.

For example, if a registered electricity producer starts conducting activities in a plant not recorded in the register, the change must be reported.

The Tax Administration changes the registration entry or removes the taxpayer, aid recipient or small producer from the register as of the date when the activities requiring registration changed or ended.

In addition, a registered natural gas user must cancel the registration if the tax-exempt use ends. The registered natural gas user is removed from the register as of the date when the removal request was made.

Small producers and users of fuel peat should estimate the extent of their activities and the registration role at the beginning of the year.

Example 1: A power plant has registered as a small electricity producer. The power plant closes down permanently during the calendar year. The tax period ends on the date when the activities end. The company must file an excise duty return for the tax period by the general due date of the second month following the month of termination. For example, if the month of termination is March, the excise duty return must be filed by 12 May.

Example 2: If a power plant has registered as a small electricity producer and its activities change during the tax period such that the volume of electricity produced during the calendar year is more than 800,000 kWh, the plant must register as an electricity producer. The Tax Administration registers the plant as an electricity producer as of the beginning of the calendar year. The company must also submit excise duty returns retroactively for the tax year’s preceding tax periods. The company must also pay a late-filing penalty and late-payment interest.

Example 3: A power plant has registered as an electricity producer. The activities change during the tax period such that the 800,000 kWh limit for small production is not reached. The Tax Administration registers the power plant as a small electricity producer as of the beginning of the current year. The company can correct the excise duty returns already filed for the year by submitting replacement returns (‘zero’ returns) in MyTax. Based on the corrections, the Tax Administration pays back the excess amount of tax paid by the power plant.

Example 4: Use of peat in the production of heat. A power plant must make an advance estimate of how must fuel peat it will use during the year. If the power plant estimates that the volume of heat produced with peat during the calendar year is more than 5,000 MWh, it must register as a registered fuel peat user as of the beginning of the calendar year. If the volume of heat produced with peat is less than 5,000 MWh, the use of peat is exempt from tax and no registration is required. If more than 5,000 MWh is used, all the use of peat is subject to excise duty, not only the use that exceeds the threshold. On the other hand, if the company estimates that its use of peat in heat production exceeds the 5,000 MWh threshold but in fact it does not, then the company can correct its excise duty return in MyTax.

If the registration details change, you can report them in MyTax. If necessary, you can also correct your excise duty returns in MyTax.

Detailed guidance

Energy taxation

Waste tax

Transparency obligation related to State aid

(available in Finnish and Swedish, link to Finnish)