Tortious interference with a contract is a civil claim you can bring against an outsider who deliberately caused someone to break a contract with you, or made performance so much harder that you suffered real financial loss. It is not a criminal charge, and it is separate from any breach claim you may have against the party who actually broke the deal. Every U.S. state recognizes some version of the tort, though the elements and labels vary.1Legal Information Institute. Intentional Interference With Contractual Relations
What You Have to Prove
Most states require five elements. All of them have to be present; missing one sinks the case.
- A valid, enforceable contract existed between you and a third party. Oral contracts count if they would otherwise be enforceable.
- The defendant knew the contract existed. They do not need to have read it, but they cannot be liable for disrupting a deal they genuinely did not know about.
- The defendant intentionally interfered. The conduct must have been deliberate, or the defendant must have known that disruption was substantially certain to follow.
- The interference actually caused a breach, or made performance meaningfully harder or more expensive. A failed attempt is not enough.
- You suffered real financial harm — lost profits, added costs, or other measurable damage traceable to the interference.
Both individuals and businesses can be sued. The plaintiff carries the burden on every element.1Legal Information Institute. Intentional Interference With Contractual Relations
When Interference Becomes “Improper”
Not every action that costs you a contract is actionable. The hardest-fought element in most cases is whether the defendant’s conduct was improper rather than ordinary competition. Courts look at several things together, with no single factor controlling:
- The nature of the conduct. Fraud, threats, and illegal acts are almost always improper. A better price or a better pitch generally is not.
- The defendant’s motive. Advancing a genuine business interest reads very differently from acting out of spite.
- The means used. Lawful competitive pressure is treated differently from deceit, coercion, or misuse of confidential information.
- The relationship between the parties. A competitor making an offer to your supplier is not in the same position as a former employee feeding lies to your clients.
- Whether the conduct serves any broader legitimate purpose.
In practice, the strongest cases involve some concrete wrongful act. A competitor tells your customer you are about to go bankrupt or that your product fails safety standards, knowing neither is true, and the customer cancels. A larger company threatens to pull its own business from a supplier unless the supplier stops fulfilling your contract. A rival knows your key employee is bound by a non-compete and actively recruits them anyway. A third party gets its hands on your pricing information or client list through improper means and uses it to steal a deal. Each of these has an identifiable wrong at the center of the story, which is what moves the conduct out of fair competition and into tort liability.
Defenses That Commonly Defeat the Claim
Defendants have several well-established arguments, and knowing them matters whether you are suing or being sued.
The most common is competition. Aggressive competition is not tortious interference. A competitor can advertise a better product, offer a lower price, or pitch your customers directly, as long as they are not using wrongful means and are genuinely trying to advance their own interests rather than inflict harm.
A defendant can also argue justification — that they were protecting a legitimate interest of their own. A parent company advising a subsidiary to terminate a contract that creates financial risk is the classic example. The question is whether the interest was substantial enough to outweigh the harm.
Giving truthful information is generally protected. If a financial advisor accurately tells a client that a business partner is under federal investigation, and the client walks away from the deal, the advisor acted properly. False information or an improper purpose is what makes the advice actionable.
Corporate officers and directors acting within the scope of their authority have a qualified privilege. A manager who tells an employee to stop using a particular vendor is engaged in ordinary corporate governance, unless the officer acted with actual malice unrelated to the company’s legitimate interests.
What You Can Recover
Damages are the point of the lawsuit, and they come in a few forms.
Compensatory damages are the core of most awards. These cover the net lost profits from the disrupted contract — gross revenue minus the costs you would have incurred to perform. You cannot just point to the top line; you need to show your actual margin.
Consequential damages are also available for downstream losses that flow naturally from the interference. If losing a key supply contract forced you to shut down a line and lay off workers, those costs can be recoverable. The losses must be proven with reasonable certainty, usually through financial records, expert testimony, or comparisons with similar businesses. Mathematical precision is not required, but speculation will not carry the day.
Punitive damages are available when the defendant’s conduct was especially egregious — malicious, fraudulent, or in willful disregard of your rights. Standards vary by state, and some jurisdictions require clear and convincing evidence, which is a higher bar than the usual preponderance standard.
Injunctive relief can also be ordered when the interference is ongoing and money alone will not fix the problem. A court might, for instance, order a competitor to stop poaching employees who are under non-compete agreements.
How It Differs From a Breach of Contract Claim
These claims get confused constantly, but they go against different people for different wrongs. Breach of contract is a claim against the party who failed to perform. If your supplier promised 1,000 units and delivered 500, your breach claim is against the supplier.
Tortious interference is a claim against the outsider who caused the breach. If a competitor bribed your supplier to short your order, the interference claim is against the competitor. The two claims are not mutually exclusive; you may have both.
The remedies also differ. Breach damages are generally limited to what the contract contemplated. Because tortious interference is a tort, it can open the door to broader recovery, including punitive damages and compensation for harm beyond the contract itself.1Legal Information Institute. Intentional Interference With Contractual Relations
At-Will Contracts Carry a Higher Bar
Contracts either side can terminate at any time — at-will employment is the common example — are treated differently in many states. Because neither party has a guaranteed right to continuation, courts often treat interference with an at-will relationship more like interference with a prospective one. The practical consequence is that you usually have to show the defendant used independently wrongful conduct, not just that they persuaded the other party to leave. A competitor who hires away your at-will employee with a better salary is generally in the clear. A competitor who does it by spreading lies about your company or using stolen client lists is not.
Prospective Deals Are a Separate, Harder Claim
If no contract was ever signed, you are not looking at tortious interference with a contract. A related tort — sometimes called interference with prospective economic advantage — covers deals you had a reasonable expectation of landing, but the bar is considerably higher. You generally have to prove the defendant used independently wrongful conduct, meaning behavior illegal or actionable on its own. Simply losing a prospective deal to a better offer is not enough, even if you were close to signing.
Practical Realities Before Filing
These cases are expensive to litigate and difficult to prove. A few things are worth weighing before you file.
Timing matters. Statutes of limitations vary by state but typically run two to four years from when the interference occurred or was discovered. Miss the window and the claim is gone.
Evidence does most of the work. Proving what the defendant knew and that their conduct was improper rather than competitive takes documentation — emails, text messages, internal memos, witness testimony tying the defendant’s actions to the breach. Cases built on “they must have known” rarely survive summary judgment.
Damages have to be concrete. A $500,000 contract that fell apart because of documented fraud is a straightforward damages case. Claims that you “would have” renewed or “could have” earned future profits are a much harder sell. Courts want financial records, not projections built on optimism.