Efficient breach refers to a situation where a party decides to breach a contract because the economic benefits of breaching outweigh the costs of not fulfilling the obligation, including any damages incurred. This concept emphasizes the idea that, in some cases, it may be more beneficial for a party to breach a contract rather than perform it if the breach results in a greater overall gain. In this context, understanding the implications of efficient breach can help clarify how damages are calculated based on expectation, reliance, and restitution.