Missouri Landlord-Tenant Law for Commercial Properties

This guide focuses on the landlord-tenant relationship itself — how rent is collected, what happens on default, how the two Missouri eviction actions work, the rules on lockouts and abandoned property, holdover tenancies, and lease guaranties. (For broader fights over CAM charges, repairs, and exclusive-use clauses, see our companion guide on commercial lease disputes.)

What law governs a Missouri commercial tenancy?

Three layers govern the relationship, and they apply in roughly this order:

• The lease. It sets rent, term, permitted use, maintenance responsibility, default and cure rights, holdover rent, and remedies. Missouri courts enforce a commercial lease as written and are generally reluctant to rewrite a bargain struck between two businesses.
• Common law of contracts and property. Fills the gaps the lease leaves open and supplies background doctrines like the duty to mitigate, waiver, and interpreting ambiguous terms against the drafter.
• Possession statutes. Missouri's rent-and-possession (Chapter 535) and unlawful-detainer (Chapter 534) statutes provide the court process a landlord must use to recover possession and unpaid rent. They control how a landlord enforces the lease, even when the lease itself describes a remedy.

Crucially, the residential-tenant protections in Missouri law generally do not apply to commercial tenants. There is no implied warranty of habitability, no statutory cap on a security deposit, and no consumer-style notice-and-cure scheme imposed by the state. Instead, the lease's allocation of risk usually controls. A tenancy is commercial when the premises are leased for business purposes — retail, office, warehouse, restaurant, or industrial use — rather than as a dwelling, and that classification replaces many tenant-friendly defaults with freedom of contract. A landlord can often negotiate for remedies (acceleration, late fees, attorney's fees, broad default definitions) that would be unusual in a residential lease, and a commercial tenant is generally bound by them if it signed.

How does a commercial landlord collect unpaid rent?

When rent is late, the landlord typically has both contractual and statutory tools, and choosing the right one depends on what the landlord actually wants — money, possession, or both.

• Demand and cure. Most leases require a written notice of default and give the tenant a short period (commonly 5 to 10 days for monetary defaults) to cure before the landlord can terminate or sue. Skipping a contractually required notice is a common landlord mistake and a frequent tenant defense.
• Rent and possession (RSMo Chapter 535). This action lets the landlord recover possession and the unpaid rent together in a single proceeding. A distinctive feature is the tenant's right to pay the rent and costs due before judgment and remain in possession — a "pay and stay" right that generally applies in commercial cases.
• Unlawful detainer (RSMo Chapter 534). Used to recover possession after the tenancy has been properly terminated; it can also allow recovery of damages, including enhanced (often double) damages for the period of unlawful holdover.
• Acceleration and guaranties. The lease often lets the landlord accelerate the remaining rent — declaring the whole balance due at once — and pursue a personal guarantor, draw on a security deposit, or call a letter of credit.

The landlord's choice depends on the goal and on satisfying the required notice first. A landlord who wants the tenant out quickly may prefer unlawful detainer; one who wants to keep the tenant but force payment may use rent and possession.

A worked example: the late restaurant tenant

Suppose a restaurant tenant on a five-year lease misses March and April rent of $6,000 per month. The lease requires a 10-day written notice of default, and the landlord sends one on April 5 demanding the $12,000 arrears plus late fees. If the tenant does not cure, the landlord can file a rent and possession action seeking the $12,000 plus accruing rent and possession — and even after suit is filed, the tenant can usually still pay everything due, including court costs, before judgment and keep the space. If the landlord instead wants the tenant gone permanently, it can terminate the lease for the uncured default and bring an unlawful detainer action for possession and damages.

How does a commercial eviction work in Missouri?

A lawful commercial eviction is a court process, not a do-it-yourself remedy. The general sequence looks like this:

1. Notice. The landlord serves the notice the lease and statute require — a notice of default, a demand for rent, or a notice to quit, depending on the ground.
2. File suit. The landlord files a rent-and-possession or unlawful-detainer action in the circuit court (associate division) for the county where the property sits. These cases are typically handled on an expedited docket.
3. Service and hearing. The tenant is served and the court holds a hearing. The tenant can assert defenses such as defective notice, payment or tender, cure, waiver, or landlord breach.
4. Judgment. If the landlord prevails, the court enters a judgment for possession (and rent or damages where applicable). In an unlawful-detainer case, that judgment can include enhanced damages.
5. Execution. The landlord obtains a writ of possession and the sheriff carries out a supervised removal. The landlord does not change the locks itself.

How long does it take?

There is no single fixed timeline, but a contested commercial eviction commonly runs several weeks to a few months from notice to a sheriff-supervised removal, depending on the county's docket, whether the tenant appears and raises defenses, and whether either side requests a continuance or appeals. A landlord who tries to compress that timeline with self-help almost always ends up slower and poorer. Tenants should treat any summons as urgent: missing the hearing usually means a default judgment for possession.

Rent and possession vs. unlawful detainer, side by side

Missouri's two possession actions are easy to confuse but serve different purposes. Rent and possession (Chapter 535) is built for nonpayment: the landlord recovers possession and the unpaid rent in one action, the tenant generally keeps the right to pay everything due before judgment and stay, and it does not require terminating the lease first. Unlawful detainer (Chapter 534) is built for a tenant who wrongfully holds over after the right to possession has ended — after the term expires or a proper termination — and a tenant cannot "pay and stay" to defeat it. Choosing the wrong action, or failing to terminate the lease before an unlawful-detainer action that requires it, can sink an otherwise valid eviction.

Can a Missouri commercial landlord lock out a tenant?

This is the single most dangerous shortcut. Even where a lease purports to authorize self-help — changing the locks, shutting off utilities, or seizing the premises without a court order — a landlord who does so risks liability for wrongful eviction and conversion of the tenant's property if the lockout is improper or breaches the peace. The business-interruption and lost-property damages can dwarf the unpaid rent, and a court can order the tenant restored to possession.

The danger is magnified in the commercial context because a locked-out business may lose perishable inventory, miss customer deadlines, or be forced to shut down — exactly the kind of consequential damages a tenant will claim. The reliable path is a statutory eviction ending in a sheriff-supervised removal, and a locked-out tenant should seek immediate legal help, because the harm compounds daily.

What about shutting off utilities or removing doors?

Constructive lockouts — cutting off electricity, heat, or water, or removing a door or HVAC unit to make the space unusable — carry the same risks as changing the locks, because they look like a deliberate effort to force the tenant out without due process. Even a lease clause expressly permitting these steps does not guarantee a court will excuse the resulting damages. The safest course is to let the sheriff, not the locksmith, remove the tenant.

What happens to a tenant's property left behind?

When a commercial tenant vacates or is evicted and leaves equipment, inventory, or fixtures, the landlord cannot simply keep or dispose of it at will. The lease often sets out a procedure for abandoned property — notice, a storage period, and a right to sell or dispose — that the landlord must follow, and one who converts a tenant's property without following the lease and the law can be liable for its full value.

Trade fixtures — items the tenant installed to conduct its business, such as display cases, restaurant equipment, signage, or machinery — generally remain the tenant's property and can usually be removed at the end of the term, provided the tenant repairs any damage caused by removal. The line between a removable trade fixture and a permanent improvement belonging to the landlord can be genuinely contested, often turning on how the item was attached and what the lease says. Both sides should photograph and inventory the space at move-out, because that documentation usually decides who owes what.

What is a holdover tenancy?

A holdover occurs when a tenant stays in possession after the lease term ends. The consequences are usually set by the lease and can be severe:

• Holdover rent. Many commercial leases impose holdover rent at 150% to 200% of the prior rent for each month (or part of a month) the tenant remains, so a tenant who stays even a few days into a new month can owe a full premium month.
• Type of tenancy created. Depending on the lease and the parties' conduct, a holdover may become a month-to-month or another periodic tenancy, or may simply expose the tenant to an unlawful-detainer action.
• Landlord's election. The landlord often can choose to treat the holdover tenant as a trespasser (and evict) or as a renewed tenant (and collect holdover rent), but cannot usually have it both ways indefinitely; accepting holdover rent may be treated as electing to continue the tenancy.

A worked example: the warehouse that stayed three days too long

Imagine a warehouse tenant whose lease ends June 30 with base rent of $10,000 per month and a holdover clause set at 150% applying to "any portion of a month." The tenant's movers run late and it does not fully vacate until July 3. Under a typical clause, the landlord can demand $15,000 for the entire month of July even though the tenant occupied only three days. Tenants planning to stay past expiration — even briefly — should confirm the holdover terms and negotiate a short transition in writing.

Does a commercial landlord have to mitigate damages?

Generally yes. If a commercial tenant abandons the premises before the term ends, Missouri generally expects the landlord to make reasonable efforts to re-let the space rather than leaving it vacant and charging the tenant for the entire remaining term. The landlord can still recover the shortfall between the lease rent and a reasonable re-letting, plus reasonable re-letting costs such as broker commissions, but a landlord that makes no effort to re-rent may have its recoverable damages reduced.

"Reasonable efforts" does not mean the landlord must accept any tenant or prioritize the abandoned space over its other vacancies — only that it treats the space the way a reasonable landlord would treat its own available inventory. A tenant who abandons should not assume mitigation erases its liability: it usually reduces, not eliminates, the damages.

How do lease guaranties and security deposits affect a default?

Commercial landlords frequently demand extra assurance beyond the tenant entity's own promise to pay, and these devices shape what happens on default.

• Personal and corporate guaranties. A guaranty is a separate promise — often by a business owner individually or by a parent company — to pay the tenant's obligations if the tenant does not. Because the tenant is frequently a single-purpose LLC with few assets, the guaranty is often where the real money is. Guaranties are construed by their terms: a "good-guy guaranty" may limit liability to rent accruing until the tenant surrenders the space, while an unconditional guaranty may reach the full accelerated balance.
• Security deposits. Commercial deposits are not subject to the residential statutory caps or return deadlines; the lease governs what the landlord may keep and when it must return the balance. A landlord generally may apply the deposit to unpaid rent and damage beyond ordinary wear, but should account for it to avoid a conversion claim.
• Letters of credit. Larger leases sometimes substitute a bank letter of credit for a cash deposit, giving the landlord a draw right that survives the tenant's bankruptcy more cleanly.

Tenants should note who signs the guaranty and on what terms, because that signature can outlive the business itself. Guarantors facing a demand should have it reviewed, since defenses sometimes exist where the landlord materially changed the deal or failed to mitigate.

When should you talk to a Missouri commercial landlord-tenant attorney?

Consider getting advice when:

• You need to send or respond to a default notice, a demand for rent, or a notice to quit.
• A tenant has abandoned the space or refuses to leave after the term, and you need to choose between rent-and-possession and unlawful detainer.
• A landlord is threatening — or has carried out — a lockout or utility shutoff.
• There is a fight over holdover rent, a security deposit, or a personal guaranty.
• A tenant's property or trade fixtures are in dispute at move-out.
• You are a tenant served with a summons and need to preserve your defenses before the hearing.

An attorney can confirm the correct notice, select the right statutory action, and steer both sides away from the costly mistakes — a defective notice or an unlawful lockout — that turn a rent problem into a damages lawsuit. Because the possession dockets move quickly, early advice is usually the cheapest.

Frequently Asked Questions