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Best Financial Supervision Authority (KNF) Brokers 2026

Written By

Christian Harris

Written By

Christian Harris

Broker Analyst and Editor

Christian is an active trader with over 7 years of experience across stocks, futures, forex, and crypto. A former tech journalist, he shifted to finance to pursue his passion for investing, eventually becoming an eToro Popular Investor. With real-world trading knowledge across multiple asset classes, he brings valuable, hands-on insights to the table. Christian has spent over 2,000 hours testing dozens of online trading brokers.

» Christian Harris Profile Page

Edited By

James Barra

Edited By

James Barra

Head of Content

James is Head of Content and a brokerage expert with a background in financial services. A former management consultant, he's worked on major operational transformation programmes at top European banks. A trusted industry name, James's work at DayTrading.com has been cited in publications like Business Insider.

» James Barra Profile Page

Fact Checked By

Michael MacKenzie

Fact Checked By

Michael MacKenzie

Broker Analyst and Editor

Michael is a writer, editor and broker reviewer with over a decade in journalism and publishing. His niche lies in editing and fact-checking content in the financial services sector, with a focus on online brokers and trading platforms. Michael previously reported on politics and economics in the Middle East and edits books for established publishers.

» Michael MacKenzie Profile Page

Updated

Feb 28, 2026

The Financial Supervision Authority, or Komisja Nadzoru Finansowego (KNF), is Poland’s regulatory body overseeing the financial markets, including online brokers.

For day traders, the KNF plays a crucial role in safeguarding against fraud, enforcing strict regulations on trading platforms, and ensuring compliance with EU standards.

Traders with KNF-authorized providers are also covered by the KDPW Investor Compensation Scheme, which provides up to 90% of lost funds, capped at €20,100, if your broker becomes insolvent.

Poland’s KNF is classified as ‘green tier’ under DayTrading.com’s Regulation & Trust Rating, reflecting its strong investor safeguards and active oversight of brokerages.

Explore our selection of the top KNF-regulated brokers in Poland. We’ve meticulously verified that every platform we recommend is listed on the KNF’s ‘Entities Search‘, ensuring its legitimacy.

Firms are either ‘brokerage houses’ or registered for ‘outward passporting’ under the EU’s crossborder initiative. 

Methodology

To discover the top brokers operating under KNF regulation, we:

How Can I Check If A Broker Is Regulated By KNF?

Ensuring the KNF regulates a broker is a straightforward process that we use to validate the credentials of every recommended platform.

You can do it in three easy steps:

1. Access the KNF ‘Entities Search’ on its website.
2. Input the broker’s name into the search field.
3. If needed, refine the search results by category to view information such as the full business trading name(s), registered office addresses, and brokerage activity information.

To illustrate how this works, you can see below that I verified that XTB is authorized by the KNF.

Taking just a couple of minutes – it’s a quick and easy process that all Polish traders should follow before depositing złoty to a new online trading account.

Christian Harris

Author

What Rules Must KNF-Regulated Brokers Follow?

Day trading brokers regulated by Poland’s KNF must primarily adhere to rules regarding client protection, proper segregation of funds, capital adequacy requirements, reporting obligations, best execution practices, conflict of interest management, and compliance with MiFID II regulations, all of which aim to ensure market integrity and safeguard investor interests.

To be granted a KNF license, a brokerage must satisfy the following fundamental requirements and safeguards:

• Client Protection: Brokers must prioritize client interests, provide clear information on services and risks, and maintain proper client account segregation.
• Capital Adequacy: Maintain sufficient capital reserves to cover potential market fluctuations and risks associated with brokerage activities.
• Best Execution: Obligation to seek the best possible price for clients when executing orders, considering price, cost, and speed, which are essential for day traders operating in fast-moving markets.
• Conflict of Interest Management: Clear disclosure and procedures to manage potential conflicts of interest arising from their business activities.
• Reporting Requirements: Regularly submit detailed reports to KNF regarding trading activity, client accounts, and financial health.
• MiFID II Compliance: Adhere to the Markets in Financial Instruments Directive II guidelines on market conduct and transparency, including order-book transparency and client suitability assessments.
• Anti-Money Laundering (AML) Compliance: Implement robust AML procedures to combat money laundering and terrorist financing activities.
• Customer Suitability: Assess client risk profile and ensure investments are appropriate for their needs and financial situation, an important check given the high-risk nature of short-term trading strategies.

Trading platforms and financial institutions who fail to comply with these regulations and other stipulations may be subject to enforcement action by the KNF, which could result in fines, sanctions, or the revocation of their license.

A notable example is the KNF’s PLN 9.9 million fine (EUR 2.3 million) for ‘differential slippage’ against XTB, a Polish broker. This practice allowed XTB to pass losses from unfavorable price movements entirely to its clients while profiting from favorable price movements, effectively putting clients at a disadvantage.

Additionally, in June 2024, the KNF fined the publicly listed lender BNP Paribas Polska PLN 500,000 (EUR 115,400) for insufficient ongoing oversight of factual and legal activities.

Bottom Line

Polish traders are strongly advised to choose KNF-regulated brokers. This ensures the brokerage’s trustworthiness and establishes a fair and transparent trading environment, offering peace of mind and guidance as you navigate your day trading journey.

You can verify this in just a few minutes on the KNF website. Or, explore DayTrading.com’s list of the best day trading platforms regulated in Poland.

It’s essential to acknowledge that online trading involves risks, regardless of the broker’s regulatory status, and you could lose all the złoty you invest.