Miss this warning sign, and you can keep spending money, lining up work, or waiting on delivery while the other side has already made clear they will not perform. An anticipatory breach happens when one party shows - by words or conduct, before performance is due - that they do not intend to carry out a contract. The law may treat that as a breach right away, even before the deadline arrives, because the promise has effectively been abandoned.

That matters because waiting can make the damage worse. If a supplier says it will not ship, or a contractor walks off and announces it is done, the other side may be allowed to act immediately: stop its own performance, look for a replacement, and seek damages instead of pretending the contract is still alive. But the signal must be clear. A vague complaint or delay is not always enough. Calling something an anticipatory breach too early can backfire and create a breach of contract claim against the wrong party.

In South Dakota, sales-of-goods contracts are governed in part by South Dakota Codified Laws § 57A-2-610, the state's version of the Uniform Commercial Code, which allows action when a repudiation substantially impairs the value of the contract. In an injury-related claim, the term can matter if a settlement agreement, repair contract, or medical-payment arrangement falls apart before payment or performance is due, affecting proof of loss and the amount recoverable.