What Constans does

Constans (legal entity: Biuro Rachunkowe CONSTANS Sp. z o.o.) is a Polish accounting and tax advisory firm founded in 2004 and headquartered in Katowice, with a branch office in Warsaw. The firm provides a comprehensive portfolio of compliance and advisory services to small and medium-sized Polish businesses — principally sole proprietorships (JDG), limited liability companies (Sp. z o.o.), e-commerce operators, and startups — covering three accounting regimes: simplified tax ledger (KPiR), full double-entry bookkeeping (księgi rachunkowe), and flat-rate taxation (ryczałt), alongside payroll and HR services, ZUS and VAT/CIT/PIT settlements, company formation, and KSeF (National e-Invoice System) implementation support. Tax advisory is delivered under a dedicated licensed sub-brand (Doradca Podatkowy Mariusz Janota, license nr 14981), and the firm offers higher-value external CFO / business restructuring services on retainer or project basis.

The firm's core operating technology is cloud-based rather than proprietary: it integrates Saldeo Pulpit (document management), Portal Biura (client accounting portal), and Subiekt 123 (invoicing), all by third-party Polish SaaS vendor Insert. This stack enables 24/7 online document exchange and nationwide remote service delivery. The business model is primarily subscription / recurring monthly retainer billing, priced by document volume, business type, VAT status, headcount, and service scope; tax advisory and restructuring are billed as professional services. Go-to-market is sales-led and relationship-based, supported by content marketing (a Polish-language tax blog), Facebook and YouTube channels, and SEO targeting local keywords ("biuro rachunkowe Katowice/Warszawa"). Constans merged with Biuro Rachunkowe REVISOR Sp. z o.o. Sp. K. in August 2022, a consolidation play in Poland's highly fragmented SMB accounting market.

Name

Constans

Legal name

Biuro Rachunkowe CONSTANS Sp. z o.o.

Website

https://constans.co

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

Constans is a Polish accounting and tax advisory firm founded in 2004, serving 382 SMB clients — primarily sole proprietors and Sp. z o.o. companies — with bookkeeping, payroll, tax advisory, and business restructuring services across Katowice, Warsaw, and nationwide online.

Ownership category

akta.pro rank

Product category

Accounting Services

NAICS

Offices of Certified Public Accountants (541211), Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121), Agencies, Brokerages, and Other Insurance Related Activities (5242)

SIC

Services-Management Consulting Services (8742), Services-Business Services, Nec (7389)

akta.pro primary industry

Tax Services (Withholding, Reclaims, FATCA/CRS) (FSAAAOAM)

akta.pro secondary industry

Intercompany & Consolidation Support (Eliminations, Group Reporting Support) (BPAAAGAG)

Keywords

• Accounting services
• Tax advisory
• Payroll processing
• Bookkeeping services
• Business consulting

Headquarters

HQ city

Katowice

HQ country

Poland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Accounting Services: Monthly retainer-based accounting services including bookkeeping, tax returns, VAT, CIT, PIT, payroll, and ZUS settlements. Pricing based on document volume, business type, and service scope.
2. Tax Advisory Services: Individual tax consultations, tax planning, interpretation of regulations, and support during tax audits. Provided by Mariusz Janota, Doradca Podatkowy nr 14981.
3. Business Restructuring / External CFO Services: Financial restructuring consulting including audits, profitability analysis, cost optimization, and implementation of controlling and management reporting. Can be project-based or ongoing retainer.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Constans is a Polish accounting and tax advisory firm that delivers ongoing bookkeeping (KPiR, full double-entry accounts, flat-rate taxation), corporate tax filings (VAT, CIT, PIT), payroll and HR services, licensed tax advisory by Doradca Podatkowy Mariusz Janota (nr 14981), company formation, business restructuring/external CFO services, and KSeF e-invoicing implementation support. Services are delivered to sole proprietors and limited liability companies at offices in Katowice and Warsaw, with 382 active clients served nationwide through online document exchange.

Product overview

Constans is a professional accounting office and tax advisory firm offering a comprehensive portfolio of services for sole proprietors (JDG), partnerships, and companies (especially Sp. z o.o.). The core offering is biuro rachunkowe (accounting services) encompassing three main accounting forms: KPiR (simplified tax ledger), Księgi Rachunkowe (full double-entry bookkeeping), and Ryczałt (flat-rate taxation). These are supported by Kadry i Płace (payroll/HR), Doradztwo Podatkowe (tax advisory by licensed tax advisor Mariusz Janota), and Zakładanie Spółek (company formation). The firm also offers specialized services including Restrukturyzacja Działalności (external CFO/business restructuring), KSeF support (e-invoicing), and financial products (insurance, credits, bank accounts). Services are delivered both at physical offices in Katowice and Warsaw and online nationwide. The firm uses third-party accounting tools including Saldeo, Subiekt 123, and Portal Biura (by Insert) for digital document exchange and client access.

Differentiator

Problem solved

Functional benefit

Brands

• Doradca Podatkowy Mariusz Janota: Separate tax advisory practice operated by Mariusz Janota (Doradca Podatkowy nr 14981), accessible via doradca-podatkowy.co

Products and services

• Biuro rachunkowe (Accounting Services) Full-service accounting office providing ongoing bookkeeping, tax return preparation, VAT, CIT and PIT settlements, and financial reporting for businesses. Covers full accounting (księgi rachunkowe), KPiR and flat-rate taxation (ryczałt), aimed at sole proprietors (JDG), partnerships and limited liability companies (Sp. z o.o.).
• Księga Przychodów i Rozchodów (KPiR) Simplified tax ledger (Revenue and Expense Register) accounting service for sole proprietors and partnerships. Includes income/expense tracking, tax calculations, VAT records and fixed assets management under Polish KPiR rules.
• Księgi Rachunkowe (Full Accounting) Full double-entry bookkeeping for companies — primarily Sp. z o.o. and other entities required to maintain księgi rachunkowe. Includes preparation of financial statements, balance sheets and P&L reports, plus CIT/PIT compliance.
• Ryczałt (Flat-Rate Taxation)

Quantifiable outcome

• 382 actively served clients
• +1 more outcomes

Segments6 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature3 records

Partnerships

Seven partnerships are on record, tiered minor and core.

• Centrum Informacji KsięgowejminorOthersIndustry association membership providing access to professional standards, best practices, and industry information for accounting professionals.
• Stowarzyszenie Księgowych w Polsce (Polish Accountants Association) & European Accounting AssociationminorOthersProfessional accounting association memberships demonstrating adherence to professional standards and connection to European accounting community.
• Krajowa Izba Biur Rachunkowych (KIBR)minorOthersNational Chamber of Accounting Offices membership representing and supporting Polish accounting firms.
• SaldeocoreTechnology or IntegrationTechnology partner providing document management platform (Saldeo Pulpit – Dokumenty) for electronic document exchange between clients and the accounting office.
• Insert (Portal Biura, Subiekt 123)coreTechnology or IntegrationTechnology partner providing accounting portal (Portal Biura – Podgląd ksiąg) for client record access and invoicing system (Subiekt 123 – Faktura) for billing processes.
• Mariusz Janota – Doradca PodatkowycoreStrategic or Co-development PartnerTax advisor (nr 14981) providing expert tax advisory services, tax planning consultations, and tax audit support. Collaborates with the accounting office to provide comprehensive tax advisory to clients.
• Biuro Rachunkowe REVISOR Sp. z o.o. Sp. K.minorOthersAccounting firm that merged with CONSTANS to combine experience, knowledge, and team potential, expanding service capabilities for clients.

Scale indicators3 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• InFakt: Polish accounting and invoicing SaaS platform serving SMBs and sole proprietors with automated bookkeeping, tax filing, and invoicing — directly competitive with Constans' online accounting and KPiR/round-rate services.
• Fakturownia: Polish invoicing and accounting platform targeting small businesses, overlapping with Constans in KPiR, invoicing, and SMB compliance workflows.
• RSM Poland: Mid-tier accounting and advisory network in Poland offering bookkeeping, payroll, and tax advisory to SMBs and mid-market — comparable services and client overlap.
• Biuro Rachunkowe Online (BR Online): Polish online accounting office serving SMBs nationwide, directly competitive with Constans' nationwide online delivery model.
• Tax Care (Rödl & Partner / independent Polish tax advisory firms): Polish tax advisory and accounting firm serving individual entrepreneurs and SMBs with tax filings, advisory, and bookkeeping — comparable to Constans in segment and service mix.

Broad incumbents

• BDO Poland: Global mid-tier accounting network with Polish operations providing audit, tax, and advisory services — broader portfolio but competes for the same SMB and sp. z o.o. compliance mandates.
• PwC Poland: Big Four firm in Poland delivering audit, tax, and consulting — adjacent incumbent that competes for tax advisory and restructuring work.
• Deloitte Poland: Big Four firm in Poland offering audit, consulting, and tax services — a broad incumbent competing for the same advisory, restructuring, and compliance mandates.
• EY Poland: Big Four firm in Poland providing tax, transaction, and advisory services — competes for advisory mandates and indirectly for outsourced accounting at scale.
• KPMG Poland: Big Four firm in Poland offering audit, tax, and advisory across enterprise and mid-market — a broader incumbent overlapping with Constans' tax advisory and restructuring offerings at the larger end.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@biurorachunkoweconstans9406
• Facebookfacebook.com/Biuro.Rachunkowe.Constans.Katowice
• LinkedInlinkedin.com/company/constans-biuro-rachunkowe

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Constans