My Commercial Lease Has an Unreasonable Clause — Can I Challenge It?

That said, "rarely" isn't "never." There are narrow, real doctrines that can void or limit a clause — unconscionability, illegality, ambiguity, fraud or duress in signing, and clauses that are really illegal penalties in disguise. They're hard to win between businesses, but they exist, and knowing which one might fit your situation tells you whether to fight, negotiate, or simply live with the clause. This guide walks you through the realistic options before you do anything you can't undo.

Start by reading the whole lease — not just the clause

Before you decide a clause is unbeatable, read the entire document. The answer to "can I challenge this?" often lives somewhere other than the clause itself.

• Look for a severability provision. Many leases say that if one clause is found unenforceable, the rest of the lease survives. That's actually good news — it means a single bad clause can fall without blowing up your whole tenancy.
• Find the integration (merger) clause. This says the written lease is the complete agreement. It matters because it can block you from arguing that a side conversation or a promise the landlord made changed the deal.
• Check for an amendment or waiver procedure. Some leases spell out exactly how a term can be changed or waived in writing. That's your roadmap to fixing the problem cooperatively.
• Re-read the clause in context. A provision that looks brutal in isolation may be softened by a notice requirement, a cure period, or a cap elsewhere in the lease.

You can't argue your way out of a clause until you understand how it fits with everything else you signed.

Understand why Missouri courts usually enforce harsh clauses

This is the hard truth, and it's better to hear it now. Missouri's default posture is to hold commercial parties to their bargain.

• Sophistication is assumed. Courts presume two businesses can read a contract, price the risk, and walk away if they don't like the terms. "I didn't read it" or "I had no choice" rarely persuades a judge in a commercial deal.
• Harsh is not the test. A clause being expensive, one-sided, or something you now regret is not, by itself, a legal reason to void it. Courts don't act as a backstop for a bad business decision.
• The lease controls. As with most commercial disputes, the document is the law of the deal. The narrow escape doctrines below are exceptions, not the rule.

Setting that expectation honestly matters, because the worst move is to stop performing — stop paying rent, or breach the clause — on the assumption a court will agree it's unfair. If you're wrong, you've handed the landlord a clean default.

Know the narrow doctrines that can actually void a clause

A handful of common-law contract doctrines can defeat or limit a clause. These are not statutes — they're judge-made contract principles — so the question is always how the facts fit the doctrine.

• Unconscionability. Missouri generally requires both procedural and substantive unconscionability. Procedural means unfair surprise — a hidden or buried term, fine-print trickery, or grossly unequal bargaining power with no real chance to negotiate. Substantive means the term itself is oppressive and one-sided. Between two businesses, this is a steep climb, because courts assume you could protect yourself.
• Illegality or public policy. A clause that requires something illegal, or that violates a clear public policy, won't be enforced no matter how clearly it's written.
• Ambiguity. If a clause is genuinely unclear — capable of two reasonable readings — a court construes it against the drafter, usually the landlord. Ambiguity won't delete a clause, but it can hand you the favorable interpretation.
• Fraud or duress in formation. If the landlord misrepresented a material term or coerced your signature, the agreement (or that part of it) may be voidable. This attacks how the lease was formed, not just whether it's tough.
• Penalty vs. liquidated damages. A clause setting damages in advance is enforceable only if it was a reasonable estimate of likely harm. If it's really a penalty — a number untethered from any real loss, designed to punish — a court can refuse to enforce it.

Pay special attention to the high-scrutiny clauses

Certain provisions worry tenants most, and a few of them do draw extra judicial attention.

• Personal guaranties. A guaranty makes you individually liable for the company's obligations. Courts generally enforce them, but the scope is everything — read whether it's unlimited, capped, or a "good guy" guaranty, and exactly when it ends.
• Acceleration clauses. These let the landlord demand all remaining rent at once after a default. They're often enforced, but they interact with the landlord's duty to mitigate, which can reduce what's actually collectible.
• Automatic renewal. A clause that rolls your lease into another term unless you give notice by a deadline can trap you. The fix is usually calendaring the notice date, not litigating the clause.
• Confession of judgment. A provision letting the landlord obtain a judgment without you appearing to defend draws heightened scrutiny because it waives basic procedural rights. If your lease has one, get it reviewed before you ever rely on or ignore it.

Negotiate before you breach — it's usually your best move

For a clause you're stuck with mid-term, the most realistic path isn't a courtroom — it's an amendment.

• Ask for a written amendment or waiver. Landlords amend leases all the time, especially to keep a paying tenant. Propose specific language that softens the clause, and get any deal in writing and signed.
• Trade something for the change. Offer a longer term, a modest rent bump, or a renewal commitment in exchange for dropping or capping the clause that scares you. A clause is easier to move when the landlord gains something.
• Document how the clause was presented. If you ever need the unconscionability or fraud arguments, you'll want a record now — was the term buried, were you rushed, were you told it "didn't really matter"? Save emails and notes.
• Raise the doctrine defensively, not offensively. Often the smartest posture is to keep performing and hold your argument in reserve. If the landlord tries to enforce the clause, you raise ambiguity, unconscionability, or penalty as a defense — from a much stronger position than if you'd breached first.
• Get the clause reviewed before you act. A short consult with a Missouri attorney to read the clause against your facts is cheap compared to a default. Know whether you actually have an argument before you bet the lease on it.

Frequently Asked Questions