Русско-англо-русский юридический словарь

Incidental costs are costs that were not expected in the normal execution of the contract, but arose due to the breach of the contract. [...] The difference between incidental and consequential damages is the cause of the expense or loss. Incidental damages are the direct result of one party’s breach of contract. Consequential damages are more indirect, being incurred not as a result of the breach itself, but due to the end result of the breach. (Legal Dictionary)