A Kraków-based manufacturing group with 520 employees and a balance sheet exceeding EUR 25 million receives a letter from its bank in spring 2026. The lender wants an ESG data room before renewing a credit facility. The finance director asks the legal team how long ESRS implementation takes. Nobody has a ready answer.

Polish companies meeting the size thresholds under the Ustawa o rachunkowości (Accounting Act, as amended to transpose the Corporate Sustainability Reporting Directive, CSRD) are required to prepare sustainability statements in line with the European Sustainability Reporting Standards (ESRS). The first wave of large public-interest entities began reporting for the 2024 financial year. Large companies that are not public-interest entities follow for the 2025 financial year, with first reports due in 2026. Smaller listed companies enter the regime in 2027. Missing the applicable deadline forfeits access to green financing and triggers supervisory scrutiny by the Financial Supervision Authority.

This guide walks through each implementation step, sets out realistic timelines and cost ranges, identifies the most common mistakes, and illustrates three business scenarios. It is written for legal counsel, CFOs, and compliance officers at Polish entities who are starting the process now.

What does ESRS require Polish companies to report?

ESRS sets the content standards for sustainability statements. It covers environmental, social, and governance topics across twelve thematic standards. The starting point is always a double materiality assessment. That assessment determines which topics are material for the company – both from a financial perspective and from an impact perspective. Only material topics require full disclosure.

The Krajowy Standard Rachunkowości (National Accounting Standard, KSR) guidance issued by the Polish Accounting Standards Committee supplements the EU-level text. The Komisja Nadzoru Finansowego (Polish Financial Supervision Authority, KNF) oversees listed entities. The Krajowa Izba Biegłych Rewidentów (National Chamber of Statutory Auditors, KIBR) sets assurance standards for the limited assurance engagement now required alongside the sustainability statement.

Two categories of disclosure run through every standard. First, governance and strategy disclosures explain how the board oversees sustainability risks. Second, metrics and targets provide quantified data. For most Polish mid-market companies, the most immediately demanding standards are ESRS E1 (climate change), ESRS S1 (own workforce), and ESRS G1 (business conduct – which connects directly to whistleblower compliance and AML frameworks already in place).

One concrete figure matters here: the general ESRS package contains 82 mandatory disclosure requirements for entities that find a topic material. Companies that complete double materiality rigorously often reduce that number to 30–40 active requirements. That is why the assessment is not a formality.

What are the key implementation steps and timeline?

Implementation runs in five sequential phases. Each phase has a defined output and a realistic duration. Skipping a phase does not save time – it creates rework. The full cycle for a company starting from scratch typically takes 9 to 14 months.

Phase 1 – Scoping and gap analysis (weeks 1–6). Map existing data sources against ESRS requirements. Identify which disclosures are already covered by existing ESG reporting, compliance programme documentation, or AML records. Assign a project owner at board level. Budget: PLN 30,000–80,000 for external advisory support, depending on group complexity.

Phase 2 – Double materiality assessment (weeks 4–14). Interview business unit leaders and key stakeholders. Score topics on impact materiality and financial materiality. Document the methodology. The output is a materiality matrix that limits subsequent reporting scope. This phase is the single most important investment in the process.

Phase 3 – Data architecture and collection (weeks 10–26). Build or adapt data collection templates. Connect HR, procurement, energy, and finance systems. Establish internal controls over sustainability data. For companies with subsidiaries, this phase must cover the consolidation perimeter.

Phase 4 – Drafting and internal review (weeks 24–40). Write the sustainability statement. Legal counsel checks alignment with the Accounting Act and CSRD requirements. The compliance lawyer reviews ESRS G1 disclosures, including anti-corruption policies and whistleblower channels.

Phase 5 – Limited assurance engagement (weeks 36–52). Engage a KIBR-registered auditor at least 12 weeks before the filing deadline. Assurance of sustainability statements is mandatory from the first reporting year. Allow 6–8 weeks for the auditor's procedures and a further 2 weeks for management responses.

How do three business scenarios shape the approach?

The implementation path differs materially depending on the company's sector, ownership structure, and existing compliance infrastructure. Three scenarios illustrate the range.

Scenario A – Manufacturing group, Silesia. A metal-processing company with 800 employees and three Polish subsidiaries already holds ISO 14001 certification. Its environmental data collection is partially in place. The gap analysis reveals that ESRS E1 climate metrics require Scope 3 upstream data not previously collected. ESRS S1 own-workforce disclosures require restructuring of existing HR data fields. Total external advisory cost: PLN 120,000–180,000 over 12 months. The biggest risk is the Scope 3 data gap, which requires supplier engagement starting no later than month three.

Scenario B – IT services company, Warsaw. A software firm with 350 employees, no physical production, and a German parent that already reports under ESRS. The parent's group report covers the Polish subsidiary under consolidation. The Polish entity still needs to assess whether it independently crosses the CSRD threshold. If it does not, it may rely on the group report – but must document that reliance formally. Legal counsel review costs: PLN 20,000–40,000. This is a common misconception: group consolidation does not automatically exempt a Polish subsidiary from independent filing obligations.

Scenario C – Foreign investor entering Poland. A French retail group acquiring a Polish chain with 1,200 employees. The acquisition closes in summer 2026. The Polish entity immediately enters the large-company reporting perimeter. The acquiring group's compliance programme design for France subsidiaries in Poland (see our related analysis at compliance programme design for France subsidiaries in Poland) must be adapted for ESRS implementation. The first Polish sustainability statement is due for the 2025 financial year, meaning data collection must be retroactively reconstructed for months already elapsed. A dedicated project team with a budget of PLN 200,000–300,000 is realistic.

We secured a complete ESRS readiness assessment and data architecture design for a manufacturing client in the Silesia region (autumn 2025), reducing their projected implementation timeline by four months.

What are the most common mistakes in Polish ESRS implementation?

Polish companies entering ESRS for the first time consistently repeat a small set of avoidable errors. Each one delays the process and increases cost. Recognising them early is the most efficient risk-reduction measure available.

The first mistake is treating double materiality as an administrative checkbox. Companies that rush the assessment produce a materiality matrix that is either too broad (reporting on everything) or too narrow (omitting topics that regulators and auditors expect to see). Both outcomes are expensive to correct after the sustainability statement is drafted.

The second mistake is isolating the ESRS project within the finance or sustainability team. ESRS G1 disclosures require input from legal and compliance. ESRS S1 requires HR. ESRS E1 requires operations and procurement. A project structure without cross-functional governance produces data gaps that surface only during the assurance engagement – at the worst possible moment.

The third mistake is underestimating the assurance timeline. KIBR-registered auditors have limited capacity for sustainability assurance in the first reporting years. Companies that begin auditor selection fewer than 16 weeks before their filing deadline risk being unable to complete the engagement in time. Personal liability of directors for late or defective financial reporting – including the sustainability statement – is a real consequence under Polish corporate legislation. For a parallel analysis of director liability thresholds, see our guide on board liability for tax arrears.

The fourth mistake is failing to align ESRS implementation with existing AML and whistleblower compliance frameworks. ESRS G1 requires disclosure of anti-corruption and anti-bribery policies. Companies that have already built those frameworks for AML compliance can reuse substantial documentation – but only if the ESRS project team is aware of what exists. Duplication wastes budget; omission creates disclosure gaps.

Our team advised a logistics company in the Pomerania region (winter 2025) that had drafted a sustainability statement without legal review. The ESRS G1 section contained disclosures inconsistent with the company's actual whistleblower channel setup, creating a regulatory exposure that required a full redraft six weeks before the filing deadline.

What should Polish companies prepare before starting?

Before engaging external advisers or drafting any disclosure, a company should assemble a core information base. The preparation phase typically takes two to four weeks and significantly reduces advisory costs downstream.

  • Board resolution appointing a named sustainability reporting owner with defined authority
  • Current organisational chart showing all entities within the consolidation perimeter
  • Inventory of existing ESG-related policies (environmental, HR, anti-corruption, AML, whistleblower)
  • List of data systems used for energy, headcount, procurement, and financial reporting
  • Prior year sustainability or CSR report, if any, with data sources identified

For companies with UK or German parent structures, aligning the Polish implementation with the parent's existing compliance programme design avoids duplication. Our analysis of compliance programme design for United Kingdom subsidiaries in Poland covers the interaction between group-level frameworks and Polish-specific requirements in detail.

A company that cannot produce the five items above within two weeks of starting the project is not ready to begin ESRS implementation. Attempting to run the process without that foundation is the single most reliable predictor of timeline overrun.

Every Polish entity in scope should also confirm its reporting deadline against the Accounting Act's size criteria. The thresholds are: more than 250 employees, and either balance sheet total exceeding EUR 25 million or net turnover exceeding EUR 50 million. Missing the applicable deadline precludes correction without supervisory consequences.

Specific situation of your company requires a tailored assessment before any implementation steps are taken. Delays in starting the process are irreversible once the financial year has elapsed.

To receive an expert assessment of your ESRS implementation readiness, contact info@kordeckipartners.com. If your company meets the size thresholds and has not yet completed a double materiality assessment, we will map your existing data sources, identify gaps, and design a phased implementation plan: info@kordeckipartners.com.

Frequently asked questions

Q: How long does a full ESRS implementation take for a Polish company starting from scratch?

A: For a large company not previously subject to CSRD, the full cycle from gap analysis to completed assurance engagement typically runs 9 to 14 months. Companies with existing ISO or CSR reporting infrastructure can compress this to 7 to 10 months. Starting the process fewer than 9 months before the filing deadline creates a material risk of incomplete assurance, which itself constitutes a reporting deficiency under the Accounting Act.

Q: Does a Polish subsidiary of a foreign parent need to file its own ESRS sustainability statement?

A: This is a common misconception. A Polish subsidiary that independently meets the size thresholds must file its own sustainability statement, even if the parent group already reports under ESRS. Reliance on the group report is permitted only in specific circumstances defined in the Accounting Act, and that reliance must be formally documented and disclosed. Legal review of the group structure is essential before assuming exemption applies.

Q: What is the cost range for ESRS implementation advisory in Poland?

A: External advisory costs vary significantly by company size and complexity. For a single-entity Polish company with 300–500 employees, a scoped engagement covering gap analysis, double materiality, and drafting support typically costs PLN 60,000–120,000. For a group with multiple Polish subsidiaries, the range rises to PLN 150,000–350,000. Assurance fees billed by KIBR-registered auditors are separate and typically range from PLN 30,000 to PLN 80,000 for the first engagement year.

KORDECKI & Partners is a law firm based in Warsaw and Krakow, advising business clients across 30 jurisdictions. Our team combines expertise in Polish and international law with a practical approach to ESG compliance, CSRD implementation, and sustainability reporting. We work with Polish entrepreneurs, foreign investors, and in-house legal teams navigating ESRS obligations for the first time. To discuss your situation, contact info@kordeckipartners.com.

Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. KORDECKI & Partners assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@kordeckipartners.com.