Invoicing in the Helen Group

We will process only e-invoices as of 1 April 2020 due to the EU directive on e-invoicing and the Electronic Invoicing Act (241/2019). If you still have not started using e-invoicing, you can send e-invoices to us via the free Basware Portal service. Our e-invoicing addresses and instructions for using Basware Portal are available at the end of this page.

Use of reference numbers

A reference number is needed in the payment of all invoices. The reference number is the order or contract number provided in connection with the order (starting with PO, PP or H). The reference number must also be added to the e-invoice data.

Invoices arriving without a reference number will be returned to the sender. More information in the Notice (PDF).

Helen Group payment terms

The general Helen Group payment terms are 30 days net (net 30). Please note this term of payment when invoicing Helen Group companies, unless otherwise agreed in a mutual contract with you. More information in the Notice (PDF).

Helen Group’s e-invoice addresses

The operator is Basware, operator ID: BAWCFI22.

Helen Ltd
Business ID 2630573-4
EDI identifier 003726305734

Helen Sähköverkko Oy
Business ID 2035428-7
EDI identifier 003720354287

Oy Mankala Ab
Business ID 0158738-4
EDI identifier 003701587384

Helsingin Energiatunnelit Oy
Business ID 2640207-5
EDI identifier 003726402075

Kiinteistöosakeyhtiö Helsingin Sähkötalo
Business ID 1901114-8
EDI identifier 003719011148

Tuulipuisto Lakiakangas 3 Oy
Business ID 2915705-2
EDI identifier 003729157052

Kristinestad Tupaneva Oy
Business ID 3007070-4
EDI identifier 003730070704

Basware Portal – send e-invoices for free

If you still have not started using e-invoicing, you can send e-invoices through the Basware Supplier Portal service. This requires an Internet connection and registration in the service. The service is free of charge. When you register in the supplier portal, you can send e-invoices to Helen Group companies and also to over 10,000 other organisations.

The service is aimed especially at small suppliers who do not have an invoicing system enabling e-invoicing. Banks, e-invoice operators and accountancy firms also offer several alternative methods for e-invoicing.

Register in the Basware Supplier Portal service 

In user/technical problems related to the Supplier Portal, please contact Basware: 


Reverse value added tax

Helen Oy applies a reverse VAT on the purchase of construction services.
Helen Sähköverkko Oy, Helsingin Energiatunnelit Oy, Kiinteistöosakeyhtiö Helsingin Sähkötalo, Oy Mankala Ab, Tuulipuisto Lakiakangas 3 Oy and Kristinestad Tupaneva Oy do not sell construction services and follow normal VAT practice.

Further information about reverse VAT (PDF)

Inquiries regarding purchase invoices

Inquiries, balance confirmations and comments regarding invoices sent to Helen Group should be made by e-mail to ostolaskut(at)

See also

Contact details for Helen

Here you can find the contact details for various parts of Helen, as well as a map of Helen’s places of business, charging points and cultural sites.

Invitations to tender

We announce current calls for tender through the supplier portal.

For the media

We serve the media in energy-related issues and offer the services of our experts for interviews.