Czech Supreme Court Confirms Courts Cannot Reduce Unfair Consumer Contract Penalties

The Czech Supreme Court has confirmed that courts cannot simply reduce excessive contractual penalties in consumer contracts. Instead, if a penalty clause is found to be unfair, it must be disregarded entirely.

The ruling, issued in judgment No. 33 Cdo 3502/2024 on 27 January 2026, strengthens consumer protection rules in the Czech Republic and brings local practice in line with long-established European Union case law.

The decision relates specifically to contracts between businesses and consumers (B2C relationships), where contractual penalties are commonly used for late payments, early termination, missed obligations or breaches of contract terms.

Under Czech law, courts are normally allowed to reduce disproportionately high contractual penalties. However, the Supreme Court confirmed that this principle does not apply in consumer contracts if the clause itself is considered unfair.

The court relied on principles established by the Court of Justice of the European Union in the Banco Español de Crédito case, which held that courts should not rewrite unfair consumer contract terms in order to make them acceptable. Instead, unfair clauses should lose legal effect entirely.

In practice, this means that if a court determines that a contractual penalty creates a significant imbalance between the rights of the business and the consumer, the clause may become unenforceable in full rather than partially reduced.

The judgment does not mean that all contractual penalties in consumer agreements are invalid. Businesses may still use such clauses, but they must be proportionate, transparent and reasonably balanced.

When assessing whether a clause is unfair, courts will examine the overall circumstances of the contract, including whether the penalty is excessive compared with the obligation being protected, whether multiple sanctions accumulate against the consumer, and whether the wording is sufficiently clear for an ordinary consumer to understand.

Courts may also consider whether the contract imposes penalties only on the consumer while placing few or no comparable obligations on the business itself.

The ruling also increases the potential financial risk for businesses using aggressive penalty clauses. If a consumer has already paid a contractual penalty that is later found to be unfair, the consumer may seek repayment on the grounds of unjust enrichment.

For businesses operating in the Czech consumer market, the decision is likely to increase the importance of reviewing standard terms and conditions, particularly in sectors where automated penalties, cancellation fees or default charges are commonly used.

The judgment reinforces a broader EU consumer protection principle that businesses should draft fair contractual terms from the outset rather than rely on courts to later reduce excessive provisions.

Source: CMS