Business Torts & Commercial Litigation

When Competitors Cross the Line: Protecting Your Business from Tortious Interference in Massachusetts

A rival undercuts your deals. A former partner poisons your client relationships. Massachusetts law gives you a powerful remedy — but only if you know how to use it.

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By a Massachusetts Business Litigation Attorney March 2025  ·  Business Torts

This is an excellent question, and one that I get asked all the time. When a competitor goes after your clients, a former partner poisons your business relationships, or someone actively works to blow up a deal you were about to close — you want to know whether the law can do something about it. In Massachusetts, the answer is often yes. The tort of intentional interference with contractual or advantageous business relations is one of the most powerful tools available to a business owner in that situation. But you have to prove the right things, in the right way, to use it successfully.

Let me walk you through what that looks like in practice.

The Four Things You Have to Prove

The reason this question comes up so often is that business owners instinctively know when something feels wrong — when a competitor crossed a line, or when a relationship was deliberately sabotaged. But feeling wronged and proving a legal claim are two very different things. To win a tortious interference case in Massachusetts, you have to establish all four of the following:

The Four Elements

1. You had a protected relationship — either an actual contract or an advantageous business relationship with a third party.
2. The other party knowingly induced the third party to breach that contract, or to end or refuse to enter your business relationship.
3. Their interference was improper in motive or means — being a tough competitor is not enough.
4. You were actually harmed as a direct result of what they did.

Miss any one of those four, and the claim is gone. That is why it is so important to sit down with an attorney and go through your specific facts before you do anything else. I have seen cases where the underlying conduct was genuinely outrageous, but the claim still could not survive because one of these elements just was not there.

What Kind of Relationship Are We Talking About?

The first thing I always ask a client who comes to me with this type of claim is: what, exactly, was interfered with? Massachusetts law protects two types of relationships, and which one you had matters a great deal to how your case gets built.

You Had an Actual Contract

If you had a real, enforceable contract with a third party and someone blew it up, you are in the stronger of the two positions. The contract does not have to be a formal written agreement — it can be oral, express, or implied, as long as it meets the basic requirements for enforcement. What it cannot be is a handshake over vague terms where nobody ever really agreed on the essentials. If the parties never nailed down the key provisions, there is no contract, and the claim fails on the first element.

Here is something I see business owners get wrong all the time: they assume that a long-standing business relationship is the same thing as a contractual one. It is not. Courts have held that years of doing business together, without an actual contract, does not create the foundation you need for this type of claim. . This is exactly why I tell every business client I work with — get it in writing. Not because I want to generate paperwork, but because if something goes wrong down the road, that written agreement may be the difference between a strong lawsuit and no lawsuit at all.

A Word of Practical Advice

Oral contracts can support a tortious interference claim, but proving one exists — and what its terms were — turns into a messy, expensive battle of he-said-she-said. A properly executed written agreement takes that problem off the table entirely. An ounce of prevention is worth a pound of cure.

You Had a Business Relationship, Even Without a Formal Contract

Now, what if you did not have a written contract — or any contract at all — but someone still reached in and killed a deal or a relationship you were counting on? You may still have a claim. Massachusetts law also protects what are called advantageous business relations, which is essentially any business relationship or prospective opportunity where you had a reasonable expectation of financial benefit.

Courts have found this satisfied in all kinds of situations — active negotiations toward a contract, a competitive bidding situation where you were in the running, an ongoing commercial relationship even without any formal paperwork. The standard, as the Massachusetts courts have put it, is a “probable future business relationship from which there is a reasonable expectancy of financial benefit.” The operative word there is probable. If the opportunity was purely speculative — a maybe, a someday, a vague possibility — that is not going to be enough. You need to be able to show that you were genuinely in line for the business.

Did They Actually Know What They Were Doing?

The second element is where a lot of cases get complicated, because it has two moving parts: the other side has to have known about your contract or relationship, and they have to have intentionally done something to interfere with it.

Knowledge Is Critical

A defendant who genuinely had no idea your contract existed cannot be held liable for interfering with it. This comes up all the time as a defense, and sometimes it is legitimate. But here is the thing — you cannot deliberately keep yourself in the dark and then claim ignorance. If the defendant made a “willful refusal to ascertain the facts,” that is not a defense.

And knowledge can be inferred from the circumstances. If a competitor is actively recruiting your people in an industry where non-compete agreements are common practice, a court may well conclude that they knew — or at least had every reason to know — those agreements existed. Deliberately looking the other way is not the same as not knowing.

What Counts as Inducement

The other side also has to have actually done something to cause the problem. The good news is that courts define inducement broadly. It does not have to be a dramatic act. It can be a simple request. It can be subtle persuasion. It can be a veiled economic threat, the promise of a benefit to the other party if they stop dealing with you, or false information quietly passed along to poison the well.

“Inducement may be a simple request or persuasion exerting only moral pressure. Or it may be a threat of physical or economic harm. Or it may be the promise of a benefit to the third person if he will refrain from dealing with the other.”

What will not work is a vague allegation that the other side’s actions somehow “jeopardized” your relationship. You need to point to specific conduct — something the defendant actually said or did that was directed at getting the third party to stop dealing with you. Generalizations do not carry a tortious interference claim across the finish line.

Not Every Aggressive Business Tactic Is Tortious

This is the element where I have the most candid conversations with clients, because it is where a lot of legitimate frustration runs into a legal wall. Not every interference with your business relationships crosses the line. Competition is legal. Fierce competition is legal. A rival offering better pricing, faster service, or a more attractive product and winning your customer away from you is not a tort — it is the market working as it is supposed to.

For the conduct to be actionable, it has to be improper in motive or means. Courts look at things like whether the defendant used fraud, misrepresentation, threats, or defamation to get what they wanted. They look at whether the goal was legitimate competition or simply an attempt to harm you. They consider whether the interference was disproportionate to any business interest the defendant actually had.

The line between hard-nosed competition and tortious interference can be a fine one, and that is precisely why getting legal advice early matters. If you are on the receiving end of conduct that feels wrong, talking to an attorney before you act — rather than after the situation has fully played out — is almost always the better approach.

And You Have to Actually Show You Were Harmed

The last element is the one that sometimes surprises people: you have to be able to show real, quantifiable harm. Lost profits from the disrupted contract or relationship. Costs you incurred because of the interference; a forfeited deposit. Courts are skeptical of speculative damages. You need documentation, financial records, something concrete that connects what the defendant did to what you lost.

So What Should You Do If This Has Happened to You?

If you think your business has been the victim of tortious interference, or if you are worried that a claim may be coming against you, here is what I tell clients.

Get your relationships documented. If you are not already putting your important business arrangements in writing, start now. Written contracts, emails that confirm ongoing terms, records of negotiations — all of that makes the first element easier to prove and harder for the other side to contest. The time to do this is before a problem arises, not after.

Pay attention to what is happening around you. If a departing employee appears to be targeting your clients, or if a competitor seems to be making specific overtures to your contractual partners, act quickly. Evidence of inducement can disappear fast, and delay makes it harder to draw the causal line between what they did and what you lost.

Know the limits of permissible competition. If you are worried about being on the wrong side of one of these claims, understand that the line between hard competition and tortious interference is real, and crossing it — even without fully realizing it — can expose you to significant liability. Getting advice before you act is a lot less expensive than defending a lawsuit after you already have.

Remember both forms of the tort. If someone is coming after you personally — harassing you, defaming you, making it impossible for you to honor your own commitments — you may have a claim even if your contractual counterpart has not budged. Do not assume you are out of options just because the interference was directed at you rather than at the other party.

The Bottom Line

Intentional interference with contractual or advantageous business relations is one of the most powerful claims available to a Massachusetts business owner — and also one of the most misunderstood. It is not a remedy for every deal that falls through or every time a competitor beats you out. But when someone crosses the line from competition into deliberate, wrongful interference with your business relationships, Massachusetts law gives you real tools to fight back.

The facts of your specific situation matter enormously in these cases. What I have laid out here is a general framework, but applying it to your circumstances requires a careful, individualized analysis. If you think this may apply to you, the time to talk to an attorney is now — not after the situation has escalated and the evidence has gotten harder to reconstruct.

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Massachusetts Business Law Counsel

Business Torts  ·  Commercial Litigation  ·  Contract Disputes