If you run a business and someone breaks a contract with you, your first instinct might be to sue them for every dollar you lost. But the law won’t let you inflate the bill. You have a legal duty to keep your losses as small as reasonably possible. This is called the duty to mitigate damages. It’s not optional, and it applies to almost every commercial contract dispute. Understand how it works before you make a claim, because failing to mitigate can cost you thousands of dollars in compensation you would otherwise recover.
The core idea is simple. When one party breaches a contract, the other party cannot just sit back, do nothing, and let the losses spiral out of control. The non-breaching party must take reasonable steps to reduce the financial harm caused by the breach. If you don’t, the court will reduce your award by the amount that you could have avoided. For example, suppose a supplier agrees to deliver 1,000 widgets to you by a certain date, but then backs out. You have a customer waiting for those widgets. If you simply tell your customer, “Sorry, the supplier failed us,“ and do nothing else, you’re likely to lose that customer’s business and the profit from the sale. A court would ask: Could you have found another supplier quickly? If you could have ordered widgets from a different source at a comparable price, then you should have. The extra losses you suffered because you didn’t bother looking will not be paid by the breaching party.
What counts as reasonable mitigation depends on the facts of each case. In general, you are expected to act sensibly and promptly, but you are not required to do anything extraordinary, risky, or ruinous. You don’t have to take a loss that is far worse than the breach itself. You don’t have to accept a substitute that is fundamentally different from what you bargained for. For instance, if you contracted to purchase commercial-grade steel and the supplier breaches, you are not expected to buy lower-quality metal and hope it works. You are also not expected to spend an enormous amount of money on expedited shipping that eats up more than the profit you’d recover. Reasonable means what a typical, prudent business owner would do under similar circumstances. Courts are usually forgiving about this, but they will not let you be reckless with the breaching party’s money.
Another important part of mitigation is that you can recover the costs of your mitigation efforts. If you spend money to reduce your losses, that spending is itself a damage caused by the breach. For example, if a contractor walks off your construction site, you might have to hire a new contractor at a slightly higher rate to finish the job. The extra money you pay is recoverable from the original contractor. Similarly, if you have to rent equipment to complete a job because your breach counterpart failed to deliver the equipment as promised, that rental cost is recoverable. The point is that you are allowed to act to protect yourself, and the breaching party shoulders the reasonable costs of those protective actions.
One common misconception is that the duty to mitigate forces you to accept an offer from the breaching party to “make it right.“ That’s not always true. If the breaching party proposes a substitute performance or a partial payment, you have to consider whether it’s reasonable to accept it. But you are not forced to accept an offer that is materially different from what you originally agreed to. For example, if a trucking company was supposed to deliver your goods on Monday but offers to deliver on Friday instead, and your entire customer schedule depends on Monday delivery, you can reject that offer and seek other arrangements. The key is to weigh the consequences. If the offer would prevent most of your losses without creating new problems, refusing it might be seen as unreasonable.
There are also special situations where mitigation is not required. One is a personal service contract. You cannot force a worker to continue being employed by you after they’ve breached an employment agreement. The law won’t order anyone to work against their will. So if your key employee suddenly quits, you have no duty to “mitigate” by making them stay. You do have to try to find a replacement, though. Another exception is the “lost volume” concept. If you sell a product and the buyer breaches, but you have an unlimited supply and there are other customers waiting, then you can still sell to someone else without losing the original sale. In that case, you are a lost volume seller. You would have made both sales, so you haven’t really avoided any loss by finding another buyer. A court will allow you to recover the profit from the original sale without demanding that you prove you tried to sell to someone else.
For business owners, the practical takeaway is to document everything after a breach. Send emails describing the steps you took to find an alternative supplier, hire a replacement contractor, or otherwise reduce your losses. Keep receipts for extra expenses. Save copies of any offers you rejected and explain why they were unreasonable. When a dispute goes to court, the breaching party has the burden of proving that you failed to mitigate. But your evidence will make your claim far stronger. Ignore this duty, and you might find that your victory at trial is a hollow one, with your damages cut down to a fraction of what you expected. The duty to mitigate is not a trap. It is simply a rule of common sense: when someone breaks a contract, the law expects you to clean up the mess as best you can. Then you can collect the bill.
