Your company’s accounting in one place

You grow your business, we take care of the accounting. Our service makes it easy to manage your company’s accounting and finances – conveniently, on a single platform:

  • issue and receive invoices compliant with KSeF,
  • settle taxes and pay social security (ZUS) – the system automatically prepares declarations and filings to authorities,
  • automate accounting processes, including recurring invoice sending, document posting, and month-end closing control,
  • access accountant support whenever you need it.
Planning to start your own business? Set up your company and open a Konto Mój Biznes account with us – you can get up to 6,000 PLN in promotions. We’ll guide you through the entire process step by step.

Legal note

The Millennium Księgowość service is provided by CashDirector S.A. with head office located in Warsaw, at Al. Jerozolimskie 96, 00-807 Warszawa. Promotion “Accounting for 1 PLN for 2 Months” is valid from 1 October 2026 to 28 February 2027 and consists of reducing the monthly fee for the Basic or Standard Accounting Services Package to 1 PLN net per month for the first two months of using the service. The promotion does not cover any additional accounting services that are charged in accordance with the Terms and Conditions of the Millennium Accounting service.

The promotion is available to sole traders who either hold or open a ‘Mój Biznes’ Account with Bank Millennium and who meet the conditions set out in the Terms and Conditions of the ‘Accounting for 1 PLN for 2 Months’ promotion. In particular, the promotion is intended for individuals who have not previously used any Accounting Services Packages within the Millennium Accounting service and who, during the preceding 24 months, have not used accounting services provided by CashDirector S.A. under any promotion organised by CashDirector S.A.

The promotion cannot be combined with other promotions relating to paid Accounting Services Packages offered by CashDirector S.A., with the exception of the ‘Entrepreneur Starter Pack’ promotion.

The detailed terms and conditions of the promotion are set out in the Regulations of the ‘Accounting for 1 PLN for 2 Months’ Promotion, available at www.bankmillennium.pl/delegate/managedfiles/136005/latest. The Regulations of the Millennium Accounting service are available at www.bankmillennium.pl/delegate/managedfiles/34005/latest.

Detailed principles of keeping business accounts, information about fees and interest rate are stipulated in General Conditions of Opening and Keeping Bank Accounts for Business Clients in Bank Millennium S.A. and the Service Price List, the said documents being available in the Bank’s branches and at www.bankmillennium.pl.