Best Financial Supervision Authority (KNF) Regulated Brokers 2026

How BrokerListings.com Selected the Top KNF Brokers

To highlight the most reliable brokers overseen by the KNF (Komisja Nadzoru Finansowego) – Poland’s financial supervisory authority – we applied a three-stage review process:

1. Regulatory Screening: Verified each broker’s authorization with the KNF register to confirm they meet Polish standards as well as EU-wide MiFID II obligations.
2. Comprehensive Broker Analysis: Scored firms across 200+ performance factors, including order execution, fees, trading platforms, leverage policies, and client asset safeguards.
3. Hands-on Testing: Conducted trading trials to measure the trading experience, from spreads and tools to funding speed and customer support quality.

What Is KNF?

Poland’s financial markets are safeguarded by the Komisja Nadzoru Finansowego (KNF). Established in 2006, the body is responsible for regulating the financial services industry, supervising the activities of market participants like online brokers, and initiating enforcement action when it identifies breaches of standards.

Known as the Polish Financial Supervision Authority in English, it operates in accordance with the Financial Market Supervision Act of 2006.

Furthermore, its principles and practices align with those of the European Securities and Markets Association (ESMA). This reflects Poland’s place in the European Economic Area (EEA), and the requirement for harmonized regulations across the region.

Both the KNF and ESMA are classified as Category A regulators under BrokerListings’ broker regulator classification system. As a result, traders and investors can expect strong protection against poor industry practices and bad brokers.

What Powers Does KNF Have?

The organization says that its supervisory remit “aims at ensuring its proper functioning, stability, security and transparency, trust [in] the financial market, and protection of the participants’ interests by providing reliable information on the market.”

Like most regulators, the KNF is tasked with issuing licenses to financial services companies including brokerages, banks, insurance companies and payment services providers.

In its supervisory capacity, it has the power to conduct on-site inspections, request documents and data, and to interview relevant individuals.

When it deems that rules have been broken, it can undertake a wide range of actions including:

• Demanding that entities implement corrective measures to address non-compliance issues.
• Imposing financial penalties on brokers.
• Revoking and suspending companies’ licenses.
• Removing members of a company’s management.
• Issuing public warnings about untrustworthy brokerages.

Pro tip: The KNF maintains a list of warnings on its website for companies suspected of a criminal offence, and entities subject to criminal proceedings in which the KNF or another ESMA-affiliated regulator is involved.

The KNF’s online warnings list. Source: KNF

In 2018, the KNF fined broker X-Trade Brokers (now known as XTB) 9.9 million Polish złoty (PLN) for rule breaches. It deemed that the company benefitted from differential slippage, in which its customers suffered losses from price slippage without receiving any benefits when price movements should have worked in their favor.

The actions took place between January 2014 and May 2015. An appeal by XTB was rejected by the Polish Supreme Administrative Court in 2023.

What Rules Must A KNF Broker Follow?

The KNF’s close relationship with ESMA means brokerages need to observe rules set out in the Markets in Financial Instruments Directive II (MiFID II).

To receive a license from Poland’s regulator, brokers offering trading services must adhere to a wide range of standards. These include:

• Targeting the best-possible trading result for clients. This is based on criteria including price, transaction charges and other costs, trade size and execution speed.
• Ensuring that all advertising material is clear, fair and not misleading.
• Disclosing the risks associated with online trading and specific financial instruments.
• Discussing and promoting products and services that are appropriate to the client. This will take into account an individual’s investing experience, tolerance of risk and other personal circumstances.
• Creating policies and procedures to detect, prevent, and manage conflicts of interest between the firm, its employees and its customers.
• Segregating the customer’s funds from those of the company to protect their assets in case of insolvency.

Establishing robust practices for record keeping. This is essential for KNF’s supervisory functions, and for the potential pursuit of enforcement action.

How Can I Check If A Brokerage Is KNF Regulated?

Verifying that a broker is KNF-approved is essential before handing over any money or personal details. Fortunately, this can be done simply and quickly using the regulator’s online Entities Search facility.

Let’s say I wish to check the regulatory status of XTB. I type the broker’s name into the search bar and hit the ‘Search’ button (as you can see I did below).

Typing XTB into the KNF’s search facility. Source: KNF

I am greeted with several options, but choose XTB’s entry under the ‘Brokerage houses’ tab, which is the most relevant category to me. Here I can see details including the company’s address, telephone numbers, and information on the activities it’s authorized to undertake.

XTB’s profile on the KNF Entities Search. Source: KNF

Pro tip: My search also reveals that XTB has operations in other EEA territories including Germany, France, Spain, Portugal, Czechia, Slovakia and Romania.

Under ‘passporting’ rules, financial services providers can operate in countries across the bloc, even if they only hold a license from one national regulator.

Bottom Line

Traders in Poland – as with those in any other regions – need to be constantly vigilant for fraudulent entities and individuals when they’re choosing a broker. Thanks to strong regulation and supervision from the KNF, investors who use officially licensed brokers can be confident that their interests are well safeguarded.

Article Sources

Komisja Nadzoru Finansowego (KNF)

What are the main sources of regulatory laws in your jurisdiction? – Baker McKenzie

European Securities and Markets Association (ESMA)

Polish Financial Supervision Authority (KNF) – KNF

Report on the Activities of the UKNF and the KNF in 2023 – KNF

Republic of Poland – Detailed Assessment of Observance of Basel Core Principles for Effective Banking Supervision – International Monetary Fund (IMF)

List of the KNF’s public warnings – KNF

Polish Court Upholds XTB’s $2.2m Fine over Differential Slippage from 2018 – Finance Magnates

Markets in Financial Instruments Directive II (MiFID II) – ESMA

Markets in Financial Instruments Directive (MiFID II): Frequently Asked Questions – European Commission

Entities Search – KNF