Contractual practices prohibited under the Data Act 

17 November 2025 | Knowledge, News, The Right Focus

One of the key aspects of the Data Act[i] is the introduction of provisions on prohibited contractual practices. These provisions are intended to protect businesses operating within the broadly understood digital industry that have a weaker contractual position.

Contractual practices that have been deemed prohibited

The Data Act prohibits the use of contractual terms concerning:

  • Access to and use of data
  • Liability and remedies for breach or termination of data-related obligations

that are unfair and have been imposed by a (stronger) party on the other (weaker) party to the contract.

Terms are considered unfair if their use grossly deviates from good commercial practice and if they:

  • Do not reflect mandatory provisions of EU law that would apply if the term had not been included in the contract

The Data Act distinguishes between two categories of unfair contractual terms:

  • Unfair
  • Presumed unfair

Unfair terms (blacklist)

A contractual term will always be considered unfair if its object or effect is to:

  • Exclude or limit the liability of the stronger party for intentional acts or gross negligence
  • Exclude the remedies available to the weaker party in the event that the stronger party fails to perform or breaches the contract
  • Give the stronger party the exclusive right to decide whether the data supplied is in conformity with the contract or the exclusive right to interpret the contract

Terms presumed to be unfair (greylist)

In accordance with the Data Act, a contractual provision is presumed to be unfair if its object or effect is to:

  • Inappropriately limit the remedies or extend the liability of the weaker party, or inappropriately limit the liability of the stronger party
  • Allow the stronger party to access and use the weaker party’s data in a manner that is significantly detrimental to the legitimate interests of the weaker party
  • Prevent the weaker party from using the data provided or generated by it during the term of the contract, or restrict such use to the extent that the weaker party cannot use the data in an adequate manner
  • Prevent the weaker party from terminating the contract within a reasonable period
  • Prevent the weaker party from obtaining a copy of the data supplied or generated by that party during the term of the contract or within a reasonable period after its termination
  • Enable the stronger party to terminate the contract at unreasonably short notice
  • Enable the stronger party to substantially change the price agreed in the contract or any other substantive terms relating to the nature, format, quality or quantity of the data to be shared, where no valid reason and no right of the other party to terminate the contract in the case of such a change is specified in the contract

The stronger party may rebut the presumption if they can demonstrate that, in this specific situation, the term should not be considered unfair.

Consequences of applying unfair contractual terms

It should be borne in mind that unfair contractual terms are not binding on the weaker party. If an unfair term can be severed from the remaining terms of the contract, those remaining terms will remain binding. However, if the rest of the contract cannot be performed separately from the unfair terms, the entire contract will be invalidated.

Contracts covered by the new rules

The new Data Act provisions on unfair contractual terms apply:

  • from 12 September 2025 – to contracts concluded after that date
  • from 12 September 2027 – to contracts concluded on or before 12 September 2025, provided that they are:
    • of indefinite duration, or
    • due to expire at least 10 years from 11 January 2024

Any questions? Contact us

[i] The Data Act is an EU regulation (2023/2854) that introduces new rules on the use of both personal and non-personal data.

Latest Knowledge

Banking sector overview | Banking today and tomorrow | June 2026

According to a statement published by GPW Benchmark, the reference rate administrator, and the Polish Financial Supervision Authority (KNF), which oversees the administrator, 31 December 2036 will be the last day on which the WIBID and WIBOR rates will be provided for all key fixing periods: 1 month (1M), 3 months (3M) and 6 months (6M).

How to correctly calculate length of service from 1 May 2026

New rules for calculating length of service have applied to private sector employers since the beginning of May 2026. With companies continuing to express concerns about the new framework, the Ministry of Family, Labour and Social Policy has addressed the most common questions. We look at the issues that are (still) troubling employers and how we can help.

Tax settlement agreement: A new tool in the General Tax Code

A draft bill amending the General Tax Code (No. UDER110) has been submitted for consideration by the Council of Ministers. The bill introduces the tax settlement agreement, a new form of amicable dispute resolution between taxpayers and the tax authority. The draft is open for inter-ministerial review and public consultation until 19 June, with the proposed date of entry into force being 1 January 2028. Below, we examine who may apply for a settlement agreement, when, and on what terms, and how the process may work in practice.

A revolutionary reform of Poland’s capital market – ETFs and the Qualified Investment Fund

Poland’s capital market is on the cusp of one of the most significant reforms in recent years, which will fundamentally reshape the regulatory framework for ETFs and introduce an entirely new investment vehicle: the Qualified Investment Fund (QIF/KFI). This is a response to market demands and presents an opportunity for Poland to close the gap with countries such as Luxembourg and Ireland, with the overarching objective of boosting competitiveness and stemming the outflow of investment capital abroad. The new regulations aim to deliver greater flexibility for investors and fund managers alike, while also aligning with current market trends and European standards. We examine what is changing in practice and what it means for all market participants.

Directive 2024/825 – the European Union’s response to greenwashing

Greenwashing poses one of the most significant challenges to the consumer protection framework in the European Union. As customers become increasingly environmentally conscious, brands are ever more inclined to leverage this interest by invoking the language of environmental protection, sustainable development and climate neutrality. Yet these claims do not always reflect the actual characteristics of their products or services. The EU has sought to bring systemic order to this area by clarifying the information obligations of traders and broadening the list of practices deemed unfair. We consider what these changes mean for businesses in practice.

GLI – AI, Machine Learning & Big Data 2026: The Polish perspective on artificial intelligence law

Global Legal Insights (GLI) is a series of international publications by the Global Legal Group (GLG), authored by legal practitioners from around the world. It offers an up-to-date and highly practical guide to the applicable regulatory landscape, complemented by expert commentary on specific areas of law across different jurisdictions. In short: legislation and actionable know-how in one place.

Banking sector overview | Banking today and tomorrow | May 2026

“The end of the dream of free housing” – this is how the Polish Bank Association (Związek Banków Polskich) has characterised Thursday’s judgments of the Court of Justice of the European Union in cases concerning whether the claims of financial institutions against CHF mortgage borrowers have become time-barred.

Return deposits like VAT? The elephant in the room: the risks of the deposit-return system

The deposit-return system was supposed to be simple. Eco-friendly. Leak-proof. Tax-neutral. However, it took just a few months for serious doubts to emerge. The first loopholes are no longer just theoretical, they are in plain sight. The mechanisms for abuse can be described quite precisely, and the scale of potential losses may be much greater than anticipated. Below, we examine where the system is losing control and how this can be addressed.

Contact us:

Konrad Grussy

Konrad Grussy

Advocate Trainee / Senior Associate / NewTech / Data Protection and Cyber Security

+48 508 326 306

k.grussy@kochanski.pl

Monika Maćkowska-Morytz

Monika Maćkowska-Morytz

Advocate / Partner / Head of the Personal Data Protection and Cyber Security Practice

+48 660 765 918

m.mackowska-morytz@kochanski.pl

Natalia Kotłowska-Wochna

Natalia Kotłowska-Wochna

Attorney-at-Law / Partner/ New Tech, IP, Trade & Logistics Practice Group / Head of New Tech M&A

+48 606 689 185

n.kotlowska@kochanski.pl