Judgment of the CJEU C-471/24 of the Court of Justice of the European Union and WIBOR-indexed Loans
The outcome of case C-471/24, adjudicated by the Court of Justice of the European Union on February 12, 2026, paves the way for the scrutiny of loan agreements based on the WIBOR reference index in terms of transparency and legal balance. This means that thousands of borrowers can effectively raise claims against banks not only regarding installments but also concerning the construction of the agreement itself.
The key findings of the CJEU:
WIBOR clauses are subject to judicial review
The Court confirmed that provisions of loan agreements concerning variable interest rates based on the WIBOR index can be examined by national courts for fairness and transparency. This means that borrowers can initiate proceedings if the bank failed to fulfill its informational obligations.
The structure of WIBOR is not automatically "unlawful"
The judgment clearly indicates that the use of the WIBOR reference index as such does not automatically invalidate the agreement. The crucial aspect is the assessment of whether the borrower was properly and fully informed about the risks and mechanisms of the index when entering into the agreement.
Informational obligations of banks
Banks must provide the borrower with all information that allows understanding:
Lack of such information may result in the clauses being deemed unfair.
The possibility of examining WIBOR-based clauses
For years, banks have maintained that the WIBOR index is a technical element of the agreement that cannot be contested because it is a public and widely used index. The CJEU confirmed that even such indices are subject to consumer protection standards — especially when they concern the main terms of the loan agreement.
On one hand — consumer protection
If a national court finds that a WIBOR clause does not meet transparency and openness requirements, it may deem it abusive (unfair). This fundamentally changes the position of the borrower — not only as a party in foreign currency disputes but also in złoty loans, which until now seemed less "controversial".
If the court finds that the WIBOR clause was non-transparent or not properly presented, the borrower may demand:
- Removal of the variable interest rate clause
The agreement remains in force, but the interest rate may be limited to the bank's fixed margin without the WIBOR component — which often leads to a significant reduction in loan installments.
- Refund of overpaid interest
If the client paid installments based on abusive provisions, claims for the return of undue payments for years of paying higher interest than would result from transparent contract terms are possible.
- Nullification of the agreement (in exceptional circumstances)
In the rhetoric of some jurisprudence and court practice, there is a possibility that national courts may address the consequences of abusiveness not only by removing the clause but, in extreme cases, declare the agreement null and void in its entirety — similar to foreign currency cases, if the removal of the clause prevents the further functioning of the agreement.
Hundreds of thousands of loans in Poland may be subject to new legal disputes.
Even if the agreement is not nullified, removing WIBOR as an interest rate component can reduce installments by several percent annually.
A national court cannot examine the method of determining the index itself, but it can examine how it was presented to the client.
If the loan was concluded without a detailed explanation of the WIBOR mechanism — especially before 2018, when different informational rules applied.
If the bank did not present the risk of interest rate increases and their effects on installments.
If the borrower paid high installments despite a formally low margin.
Each case requires analysis of the agreement, clauses, deliveries, and the method of informing about risks.
As an attorney, I represent borrowers in disputes concerning:
This process begins with a free analysis of the loan agreement and assessment of the abusiveness risk of the provisions.
The CJEU judgment C-471/24 does not mean the automatic "nullification of all WIBOR loans".
BUT: it confirms that clauses related to WIBOR are subject to full judicial review for transparency and fairness, which is a significant step towards real claims for borrowers.
This ruling opens a new era of loan disputes in Poland — comparable to the era of foreign currency cases.
No. The CJEU confirmed that the mere use of WIBOR does not invalidate the agreement. The key is the transparency of clauses and the way the client is informed about the risk. If the bank did not fulfill its informational obligations, claims can be raised.
The national court can verify whether the provisions of the agreement concerning WIBOR were transparent, understandable, and did not infringe on the consumer's interests. If not, the clauses may be deemed abusive, which can result in an interest rate adjustment.
Yes. If the court finds that the WIBOR clause was unfair, you can demand a refund of overpaid interest resulting from the abusive clause.
In exceptional cases, yes. If the removal of the abusive clause prevents the further functioning of the agreement, the court may declare the agreement null and void in its entirety — similar to foreign currency cases.
Most often from the moment the clause was applied contrary to transparency requirements. In practice, the entire loan repayment period is analyzed, often even several years back.
Not everyone. It is necessary to analyze:
No. The judgment applies to agreements concluded previously and currently, if WIBOR clauses were applied in a non-transparent or misleading manner.
You can preliminarily analyze the agreement, but full qualification requires legal expertise — e.g., checking clauses, interest rate tables, and bank documentation.
The most effective way is through a free analysis of the loan agreement by a lawyer specializing in disputes with banks. An initial assessment allows determining whether to initiate proceedings or negotiate with the bank.
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
I highly recommend the Haber&Haber Law Firm and collaboration with Counsel Błażej Haber. Professionalism, diligence, and high personal culture assured me that I was in the right place. I wish to express my heartfelt gratitude for the empathy and humane approach to the client. In a word, a wonderful person.
I highly recommend 100%! This is undoubtedly one of the best attorneys. He addressed my issue immediately despite the limited time before the proceedings. The time of day for consultations was irrelevant. The case was concluded in the manner we had agreed upon. I advise others not to hesitate to call and discuss their situation.
