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About us

Our business operations are carried out by separate entities dedicated to providing specific types of accounting services:

GWARANT FINANSE I KSIĘGOWOŚĆ Spółka z ograniczoną odpowiedzialnością Spółka komandytowa is a licensed accounting and tax office that renders bookkeeping, tax, HR and payroll services based on certificate No. 17563/00 issued by the Minister of Finance.

KANCELARIA BIEGŁEGO REWIDENTA GWARANT Spółka z ograniczoną odpowiedzialnością is an entity entered into a list of the National Board of Auditors which groups entities authorised to audit financial statements under entry No. 3885; it provides audit, tax advisory and other relevant audit-related services.

Both companies continue the business activities and traditions of Biuro Rachunkowe i Podatkowe, Kancelaria Biegłego Rewidenta Gwarant Renata Gruszka which started its operations in 2000.

Our offices stand for reliability with a professional, state-of-the-art approach to every single issue, even the most complex one. Partnership in business is our underlying principle, and the success of our clients is a priority for us. Our clients appreciate it, which is evidenced by their references.

In order to provide top-quality services, our employees constantly improve their skills and develop professionally, participating in relevant courses and training sessions. In the case of the most complicated issues, we consult our associates running legal offices and audit firms.

We work using advanced equipment, including the latest release of CDN OPTIMA developed by COMARCH S.A. so as to provide: ​

  • software always compliant with the regulations in force
  • free of charge invoicing software
  • direct connection between our office and our clients’ ERP systems.

We recommend our accounting and HR & payroll outsourcing services.

Six reasons in favour of outsourcing

  • Direct costs reduction and improved control over costs
  • Focus on core activities
  • Access to the best and latest solutions
  • Availability of released resources to be assigned for other purposes
  • No relevant in-house resources
  • Risk split with a service provider

Comparison of accounting services provided by a third-party company and by in-house staff:

Third-party company

In-house employee

low contract management costs

high maintenance costs (remuneration premiums)

high competences and objectivity in the selection of methods to be applied

use of methods most convenient from a personal perspective

no costs to increase qualifications

necessity to incur costs to consistently enhance professional competences (training)

ensured work continuity

holidays, sick leave, staff rotation

experience is a sum total of the team’s experience

individual experience

experience in dealing with tax and fiscal inspections

contact with inspections once every several years or less frequently

guarantee of data processing security

potential loss of an employee in possession of vital information


SFG Holding s.r.o.

"Based on our long-year pending cooperation – professional, reliable and willing partner".

Aesseal Polska Sp. z o.o.

“AESSEAL Polska has been a client of Gwarant since the start of its operations launched in Poland in 2005. Gwarant provides us with efficient and dependable bookkeeping services and supports us in keeping track of changes in any pertinent regulations. The accounting office to use!”

SPETECH Sp. z o.o.

“We are pleased to recommend the services provided by Gwarant which has been reliably keeping our accounts for over 18 years, always in conformity with applicable provisions of law, which is evidenced by audits conducted at our company on an annual basis and by tax inspections.”

BELSE  Sp. z o.o.

“We highly appreciate Gwarant’s long-term, professional and dependable bookkeeping services rendered for our company. The staff is well-mannered, professional and reliable.”

Flex Work Sp. z o.o.

“Based on our experiences with Gwarant, we can vouch that it is a trustworthy partner. We recommend the services provided by this accounting office”.