Accounting outsourcing Poland arrangements have become a default setup for foreign companies that operate a Polish sp. z o.o., a branch office, or a payroll-only presence, because Polish statutory bookkeeping is not something a lean local team can safely run on the side. The Polish Accounting Act sets out detailed rules on how books must be kept, which entities qualify for simplified versus full accounting, and how financial statements are formatted and filed with the National Court Register. Layered on top of that are monthly VAT obligations, JPK structured file submissions to the tax authority, and the phased rollout of KSeF, the mandatory national e-invoicing system that is reshaping how every VAT-registered business in Poland issues and receives invoices. Getting any of this wrong carries real financial exposure, from late filing penalties to VAT audit flags, which is why so many international finance leaders choose accounting outsourcing in Poland rather than building an in-house compliance function from scratch.
The providers on this list are not the same names that dominate a generic global accounting outsourcing roundup. Each one has been checked against its own website for a specific, published claim of Polish statutory accounting capability: local bookkeeping under the Accounting Act, VAT and JPK filing, statutory financial statement preparation, and in most cases explicit KSeF readiness work. Some are pan-European corporate services groups with a Polish office among dozens of jurisdictions; others are Polish-headquartered accounting outsourcing companies that built their entire practice around serving foreign-owned entities. Both models show up here because buyers have genuinely different needs: a US parent company setting up its first Polish subsidiary wants something different from a German manufacturer that already has an ERP system and just needs a compliant local ledger. If you want the broader picture of remote accounting outsourcing services outside Poland, our companion roundup of top remote accounting services and solutions covers that global landscape, while this list stays narrowly focused on firms with genuine Polish statutory accounting expertise.
Below, you will find a quick-reference comparison table, followed by detailed write-ups of each firm covering their history, Polish office footprint, service scope, certifications, and who they are the best fit for. A buyer’s guide at the end walks through the specific questions worth asking before signing a contract with any accounting outsourcing services provider active in the Polish market, from KSeF integration timelines to how pricing scales with transaction volume.
Accounting Outsourcing Companies In Poland At A Glance
The table below summarizes headquarters, published team size where available, and the buyer profile each firm serves best, in the same order the full write-ups follow.
| Company | Headquarters | Team Size | Best For |
|---|
| Accace | Bratislava, Slovakia (Poland office in Warsaw) | 800+ experts group-wide | Multi-country CEE entities wanting one accounting and payroll platform |
| TMF Group | Amsterdam, Netherlands (Poland offices in Warsaw and Katowice) | 13,000+ globally | Global enterprises needing entity management plus statutory accounting |
| Grant Thornton Poland | Warsaw, Poland | 1,200+ in Poland | Mid-size to large subsidiaries wanting audit-adjacent accounting rigor |
| Rödl & Partner Poland | Nuremberg, Germany (six Polish offices) | Not published | German-speaking parent companies and DACH-linked investors |
| RSM Poland | Poznan, Poland | Not published | Mid-market firms needing ERP-integrated outsourced bookkeeping |
| BDO Poland | Warsaw, Poland | Not published | Companies needing multi-GAAP bookkeeping (PSR, IFRS, US GAAP, HGB) |
| Crowe Poland | Poland (multiple offices) | Not published | Long-term clients wanting continuity and dedicated account teams |
| Forvis Mazars Poland | Warsaw, Poland | Not published | Groups needing GAAP conversion and consolidated management reporting |
| getsix | Wroclaw, Poland | Not published | Foreign-owned SMEs wanting a dedicated Polish accounting bureau |
| ASB Group | Prague, Czech Republic (Poland office) | Not published | Companies needing coordinated VAT compliance across the CEE region |
| VGD Poland | Poland (Belgian-founded network) | 40 experts | Smaller foreign subsidiaries wanting a boutique, hands-on team |
| GLC Business Services | Katowice, Poland | 160 specialists | Manufacturing and logistics clients wanting a combined legal-accounting bureau |
Best Accounting Outsourcing Companies In Poland Options In 2026
1. Accace — CEE-Wide Outsourcing Built For Multi-Jurisdiction Finance Teams
Accace runs its Polish accounting practice out of a Warsaw office on al. Jana Pawła II, as one node in a network the firm says covers more than a dozen countries across Central and Eastern Europe. Group-wide, Accace states it employs over 800 experts and serves more than 80,000 companies, with more than half its client base drawn from Fortune 500 organizations, which signals a practice built to standardize accounting across several subsidiaries rather than handle a single one-off engagement.
The Polish service scope is detailed: day-to-day bookkeeping maintained in line with Polish requirements, processing of supplier, customer, bank, and internal transactions, month-end and year-end closing with accruals and reconciliations, CIT and VAT return preparation, and coordination of JPK (SAF-T) file submissions. Accace also offers accounting supervision for companies that keep some function in-house but want a second set of eyes, record reconstruction for companies with incomplete documentation, and e-invoicing implementation support tied to Poland’s KSeF rollout. English-language reporting is built into the offer, aimed at headquarters teams that need to understand Polish output without a translator.
This is a strong fit for a company already running finance operations in two or three CEE countries that wants one outsourcing partner rather than a patchwork of local firms, particularly where headquarters staff need clean English summaries of what a Polish accountant produced.
2. TMF Group — Global Entity Management Paired With Statutory Accounting
TMF Group has operated in Poland for more than 30 years, with offices in Warsaw and Katowice, and the firm marked that milestone with an anniversary event referenced on its own site. Globally, TMF describes a footprint of roughly 13,000 colleagues across more than 125 offices in 87 jurisdictions, which places its Polish accounting practice inside one of the largest corporate services networks operating in the country.
Its accounting and tax service line covers statutory bookkeeping, corporate income tax and VAT return preparation, JPK filings, and annual financial statement filings, alongside entity formation and management for both sp. z o.o. and S.A. structures. Because TMF’s core business is corporate secretarial and legal entity management, its accounting offer is frequently bundled with company formation, registered office services, and liquidation support, making it a natural choice for companies establishing a Polish entity for the first time. TMF holds an ISAE 3402 Type II qualification and ISO/IEC 27001:2022 certification, both relevant to buyers with strict data security and internal controls requirements.
TMF is best for multinational groups that want a single vendor to both stand up and maintain a Polish legal entity, with statutory accounting as one part of a broader compliance package rather than a standalone bookkeeping engagement.
3. Grant Thornton Poland — Audit-Network Rigor Applied To Outsourced Bookkeeping
Grant Thornton has operated in Poland for 32 years and now runs seven offices with more than 1,200 employees serving upwards of 2,500 clients, giving its accounting outsourcing division a scale that few Polish-focused competitors can match. The firm sits inside a global Grant Thornton network the company describes as over 40,000 employees across 140 countries.
Its accounting outsourcing service covers bookkeeping compliant with both the Polish Accounting Act and IAS/IFRS standards, tax filings, statistical reporting to GUS and NBP, Intrastat declarations, financial statement preparation, invoice issuance, and document archiving. Grant Thornton has publicly named client engagements including MS Towarzystwo Funduszy Inwestycyjnych, Dutchmed, Wind Service, and the National Stadium in Warsaw, and the firm has received “Reliable Outsourcer” and “Outsourcing Star” industry recognitions in Poland.
This firm suits mid-size to large subsidiaries that want the discipline and documentation standards of an audit-network firm applied to their day-to-day bookkeeping, especially where dual PSR/IFRS reporting is required for group consolidation.
4. Rödl & Partner Poland — German-Standard Accounting For DACH-Linked Investors
Rödl & Partner is headquartered in Nuremberg and has operated in Poland for more than 30 years, with six offices spread across Warsaw, Cracow, Wroclaw, Gdansk, Poznan, and Gliwice. The firm positions its Polish practice explicitly around serving German-speaking clients, offering accounting outsourcing in Polish, English, and German and describing its approach as pairing in-depth knowledge of Polish regulations with German reporting standards.
The accounting outsourcing line covers bookkeeping intended for companies looking to cut costs and increase efficiency, along with accounting audit support, accounting supervision, financial statement preparation, and document workflow systems. Partners Aneta Bolka and Tomasz Balcerak are named as the primary contacts for the finance and accounting practice, and the broader firm layers tax compliance advisory into the same offering.
Rödl & Partner is the clearest choice for a German, Austrian, or Swiss parent company that wants a Polish accounting team fluent in German reporting conventions and comfortable communicating directly with a DACH-based finance department, without needing a separate translation layer.
5. RSM Poland — ERP-Integrated Outsourced Accountancy For Growing Mid-Market Firms
RSM Poland operates from offices in Warsaw, Poznan, Katowice, and Szczecin, and lists four dedicated Accounting and Payroll Partners by name across those locations, including Anna Ramut in Katowice and Radoslaw Osmolski in Warsaw. RSM’s global network is a well-established mid-market audit and advisory brand, and its Polish outsourcing arm reflects that same mid-market positioning, sitting a tier below the largest global networks while still offering multi-office national coverage.
Its outsourced accountancy service includes everyday bookkeeping, VAT statement preparation, purchase and sales register maintenance, fixed asset record-keeping and depreciation planning, and annual and interim financial statement preparation under Polish accounting regulations. RSM Poland explicitly lists KSeF e-invoicing integration support and reporting to statistical offices and the National Bank of Poland. On the technology side, the firm supports clients running Oracle NetSuite and Microsoft Dynamics 365, which matters for companies that want their outsourced bookkeeping to plug directly into an existing group ERP rather than run on a separate system.
RSM Poland fits mid-market companies that already run a modern ERP platform and want an outsourcing partner able to work inside that system, rather than handing over a spreadsheet-based process.
6. BDO Poland — Multi-GAAP Bookkeeping Under One Warsaw-Based Team
BDO Poland’s accounting outsourcing division is led by Piotr Gracz, Vice-President of BDO and Managing Partner of the Business & Outsourcing Department, and the firm operates as part of the global BDO network, one of the larger international audit and accounting alliances active in Poland.
What distinguishes BDO’s Polish offer is its explicit multi-standard bookkeeping capability: the firm advertises full books and simplified books maintained under Polish Accounting Standards (PSR), international standards (MSR/MSSF, i.e., IFRS), US GAAP, and German HGB. Beyond bookkeeping, the service scope covers VAT record-keeping and settlement, VAT refund applications, statutory and consolidated financial statement preparation, tax returns, CIT handling, audit preparation support, management reporting, and assistance during tax inspections.
BDO Poland is the strongest option for a company whose parent reports under a GAAP other than Polish or IFRS standards and needs a Polish accounting team that already knows how to reconcile local books to that framework, rather than treating the conversion as a bespoke project.
7. Crowe Poland — Three-Decade Continuity With Direct KSeF Integration
Crowe has operated its accounting outsourcing practice in Poland for more than 35 years, and the firm notes that many client relationships have lasted 25 years or longer, a continuity claim worth weighing for buyers wary of high staff turnover at outsourcing vendors.
The service line covers bookkeeping (maintaining accounting books, fixed asset registers, and settlement registers), VAT and CIT settlement and declaration preparation, financial statement preparation compliant with both Polish regulations and IFRS, and consolidated group reporting delivered in English for head office communication. Crowe specifically describes integration with KSeF for automatic receipt of invoices, a concrete detail that goes beyond simply stating KSeF “readiness.” The firm holds ISO 27001 and ISO 9001:2015 certifications and carries professional liability insurance of PLN 10 million.
Crowe Poland suits companies that value vendor stability above all else and want documented, technical KSeF connectivity rather than a general promise of e-invoicing compliance.
8. Forvis Mazars Poland — GAAP Conversion And Consolidation For Group Reporting
Forvis Mazars runs its Polish accounting and reporting practice from offices in Warsaw, Cracow, Poznan, and Wroclaw, and the firm has previously been ranked the number two accounting outsourcing firm in Poland by the Warsaw Business Journal, according to its own published news archive. The practice is led by Monika Nowecka as Head of Outsourcing Services, with Marta Bednarek and Bozena Wojcik named in accounting outsourcing and accounting services roles respectively.
Service scope includes bookkeeping and chartered accountancy, statutory financial statement preparation, management reporting and account consolidation, cost accounting and performance management, and GAAP conversion between IFRS or US GAAP and Polish local standards. The firm runs its accounting processes on ERP-class software and provides secure VPN-based online access to client accounting records, with InControl and Signal group tools available for multi-country clients that need centralized visibility across several jurisdictions. Forvis Mazars holds ISO 27001:2017 certification.
This firm is best for a group finance function that needs Polish statutory output converted cleanly into IFRS or US GAAP for consolidation, and wants a named outsourcing lead rather than a rotating account team.
9. getsix — A Dedicated Polish Accounting Bureau Built For Foreign-Owned SMEs
Unlike the audit-network firms on this list, getsix is a standalone accounting outsourcing company headquartered in Wroclaw, with additional offices in Poznan, Warsaw, Szczecin, Katowice, and Rzeszow, giving it one of the widest regional footprints among Polish specialist bureaus. The firm is a member of HLB International, a global accounting and advisory network, and offers services in Polish, English, and German.
getsix’s own service description covers “keeping the books in accordance with Polish law,” VAT and VAT EU register and declaration management, PIT and CIT declaration preparation, financial statement preparation, and KSeF e-invoicing support delivered through either shared or dedicated service environments depending on client size. The firm holds ISO 9001:2015 certification issued by TÜV NORD, ISO/IEC 27001 certification for data security, and a Microsoft Solutions Partner designation, and it publishes client review scores that put it among the higher-rated dedicated Polish accounting outsourcing bureaus.
getsix is a good match for a foreign-owned small or mid-size business that wants a Polish accounting specialist rather than a subsidiary of a global audit brand, particularly if the buyer values a firm whose entire business model is built around inbound investors.
10. ASB Group — Regional VAT Compliance Across Four CEE Jurisdictions
ASB Group operates across the Czech Republic, Poland, Slovakia, and Hungary, positioning itself as a single accounting, tax, and payroll partner for companies with operations spread across those four countries rather than Poland alone. The firm describes its team as a mix of accountants, payroll specialists, and tax advisors, though it does not publish a specific headcount, which makes reference checks with existing clients a useful step before signing.
Its published service list includes accounting and reporting, corporate services covering governance and entity management, tax advisory, payroll and HR administration, transaction advisory for acquisitions, and a dedicated “VAT CEE Compliance” line covering VAT registrations, filings, and compliance obligations across the region. That regional VAT specialization is a notable differentiator for companies that sell into or operate across several Central European markets simultaneously and need consistent VAT treatment rather than four disconnected local filings.
ASB Group is best suited to a company whose Polish entity is one piece of a wider Central European footprint, particularly where cross-border VAT compliance, not just Polish bookkeeping, is the primary pain point.
11. VGD Poland — A Boutique 40-Person Team With Belgian Corporate Roots
VGD traces its roots to a Belgian-founded international network and has operated in Poland for 15 years, part of a group present in ten countries overall. The Polish accounting team is explicitly sized on the firm’s own site at 40 experts, one of the few providers on this list that publishes a specific headcount, which gives buyers a clearer sense of scale than most competitors.
The Polish service offer covers bookkeeping, posting of various accounting document types, tax return preparation, ZUS (Social Insurance Institution) filings, financial statement preparation and statutory reporting, withholding tax calculation, and support during tax audits. VGD states that it handles accounting for “hundreds of companies,” aimed at businesses that would rather outsource the function entirely than build an internal finance department. The firm has received Silver Winner recognition in the BBC Award from the Belgian Business Chamber for sustainable development and corporate social responsibility work.
VGD Poland is a sensible choice for a smaller foreign subsidiary that wants a boutique-scale team it can build a direct relationship with, rather than being one account among thousands at a global network firm.
12. GLC Business Services — A Combined Legal-And-Accounting Bureau For Manufacturing Clients
GLC has operated for 25 years from offices in Katowice and Warsaw, employing 160 specialists across accounting, legal, tax, and IT support functions. The firm won the annual “Accounting Leader” competition in Poland, a recognition it highlights alongside ISO 9001/2008 and ISO 27001/2013 certifications and professional liability insurance that exceeds statutory minimums, details the firm lists prominently to reassure foreign clients unfamiliar with the Polish accounting market.
Its service scope spans accounting and bookkeeping, auditing, tax consultancy and compliance, payroll, management accounting, financial reporting, and eInvoicing preparation and consultation tied directly to KSeF. What sets GLC apart is the breadth beyond pure accounting: the firm also runs a commercial and corporate legal practice, including intellectual property law, and supports IT systems implementation across platforms such as SAP, Enova, Comarch, and Microsoft Dynamics. GLC states particular sector depth in automation, pharmaceuticals, transport and logistics, and family-owned businesses.
GLC is best for manufacturing, logistics, or industrial clients based in southern Poland who want accounting, corporate legal support, and ERP implementation handled by one bureau rather than coordinating three separate vendors.
How To Choose An Accounting Outsourcing Company In Poland
Do You Need Bookkeeping Only, Full Statutory Accounting, Or Tax Advisory On Top?
These are three distinct scopes and providers price and staff them differently. Bookkeeping-only means someone posts transactions and reconciles accounts, but you or your parent company remain responsible for filings and interpretation. Full statutory accounting adds VAT and CIT return preparation, JPK submissions, and financial statement production under the Polish Accounting Act. Tax advisory sits on top of both and covers judgment calls, such as how to structure a transaction for VAT purposes or how to respond to a tax authority inquiry. Firms like BDO, Grant Thornton, and Forvis Mazars bundle advisory naturally because of their audit-network heritage, while dedicated bureaus like getsix or VGD may treat advisory as a separate, quoted add-on. Get the scope boundary in writing before comparing prices, because a low bookkeeping-only quote is not comparable to a full-service quote from a competitor.
Is The Provider Genuinely Ready For KSeF, Not Just Aware Of It?
KSeF is not optional and the rollout timeline has already shifted more than once, which has left some providers describing “awareness” of the system rather than working integration. Ask specifically whether the firm has already connected client invoicing flows to KSeF’s test or production environment, how it handles structured invoice data exchange with your existing invoicing or ERP tool, and what happens during any system outage or transition period. Crowe’s description of “integration with KSeF and automatic receipt of invoices” and RSM’s explicit mention of KSeF integration support are the kind of concrete language worth looking for on a provider’s own site, as opposed to a generic mention that the firm “supports KSeF compliance.”
Do You Need Polish GAAP Reporting, IFRS, US GAAP, Or A Conversion Between Them?
A Polish sp. z o.o. must file statutory financial statements under the Polish Accounting Act (PSR) regardless of what standard its foreign parent reports under. If your headquarters consolidates under IFRS or US GAAP, someone needs to convert the Polish books, and not every provider does this as a core competency. BDO Poland explicitly advertises books maintained under PSR, IFRS, US GAAP, and German HGB, while Forvis Mazars specifically lists GAAP conversion as a named service line. If your group reporting standard is anything other than Polish GAAP, confirm the provider has done that specific conversion before, rather than assuming any accounting firm can handle it as a matter of course.
How Well Does The Provider Integrate With Your Existing ERP Or Accounting Software?
An outsourced accounting team that works inside your existing system, rather than maintaining a parallel one, cuts down on reconciliation work and reduces the risk of data drifting between systems. RSM Poland names support for Oracle NetSuite and Microsoft Dynamics 365 specifically, GLC lists compatibility with SAP, Enova, and Comarch, and Forvis Mazars describes ERP-class software with secure VPN access for clients. If your company already runs a specific platform, ask each shortlisted vendor directly whether they have implemented that exact system for a Polish client before, since general ERP familiarity is not the same as hands-on experience with your specific software.
What Data Security And Confidentiality Standards Does The Firm Hold?
Outsourced accounting means handing over sensitive financial data, bank access details, and often payroll information, so information security certification is not a box-checking exercise. TMF Group holds ISAE 3402 Type II and ISO/IEC 27001:2022, Crowe holds ISO 27001 alongside PLN 10 million in professional liability coverage, and getsix and GLC both carry ISO/IEC 27001 certification for data security. Where a provider does not publish a specific certification, ask directly how client financial data is stored, who has access, and whether the firm carries professional indemnity insurance and at what coverage level, since a bookkeeping error that goes undetected for a full fiscal year can be an expensive mistake to unwind.
How Is Pricing Structured, And Does It Scale With Your Transaction Volume?
Polish accounting outsourcing is typically priced either as a fixed monthly fee tied to a transaction volume band, or on a more granular per-document basis for very small entities. A dormant or newly registered Polish entity with minimal activity should cost meaningfully less per month than an operating company processing hundreds of invoices, and a provider unwilling to structure pricing around your actual volume is worth questioning. Ask for a sample fee schedule tied to transaction bands rather than a single flat number, and confirm whether services like KSeF integration, payroll, or CIT return preparation are included in the base fee or billed separately, since these add-ons can materially change the total cost of an outsourcing arrangement.
Conclusion
Choosing an accounting outsourcing partner in Poland is less about picking the biggest name and more about matching a provider’s actual operating model to your entity’s complexity. A newly registered subsidiary with a handful of transactions a month has very different needs than a manufacturing operation running SAP across multiple warehouses, and the firms profiled here span that entire range, from global corporate services groups managing statutory accounting as one piece of a broader entity management package, to boutique Polish bureaus built specifically to serve inbound foreign investors.
What should not vary, regardless of which provider you choose, is verified capability on the fundamentals: bookkeeping that actually complies with the Polish Accounting Act, VAT and JPK filing discipline, and a concrete, working answer on KSeF integration rather than a vague promise of future readiness. The providers in this roundup were included because their own websites make specific, checkable claims about Polish statutory accounting work, not because they simply list Poland among dozens of countries served.
Before signing with any accounting outsourcing companies operating in Poland, request references from clients with a similar entity structure and reporting standard to your own, get a written scope document that separates bookkeeping from tax advisory, and confirm KSeF integration status directly rather than relying on marketing language. That due diligence step takes a few extra days but prevents the far costlier scenario of discovering, mid-fiscal-year, that your outsourced accounting provider is not actually equipped to handle your specific compliance needs.
