Penalty clause

A penalty clause (or liquidated damages clause) is a contractual stipulation by which the parties fix in advance the amount of damages payable in case of breach or delay. It avoids the difficulties of proving actual loss.

Important distinction between legal systems:

• Civil law (France, Germany): penalty clauses are valid but the court may reduce or increase the penalty if manifestly excessive or derisory
• Common law (England, US): a penalty clause is unenforceable. Only liquidated damages (a genuine pre-estimate of loss) are valid. The distinction turns on whether the amount is proportionate to the anticipated harm.

In international contracts, careful drafting is essential. Best practice is to:

• Frame the clause as liquidated damages, not a penalty
• Ensure the amount is a reasonable estimate of potential loss
• Include a cap (typically 5-10 % of the contract value)
• Specify whether the clause is exclusive or cumulative with other remedies

Common applications include:

• Late delivery: daily or weekly rate (0.5 % to 1 % per week, capped at 5-10 %)
• Non-conformity: penalty proportional to the defect
• Breach of confidentiality or non-compete: deterrent amount