The Foundation of Self-Defense Law in Missouri

Missouri law allows you to use force to protect yourself or others—but only when certain criteria are met.

At a high level, you must:

• Be the innocent party,
• Be facing an immediate threat,
• Have a reasonable belief that force is necessary, and
• Use a level of force that is proportional to the threat.

If any one of these is missing, your claim of self-defense may fail.

When Can You Use Force in Missouri?

You can use non-deadly force when it is reasonably necessary to stop:

• Assault
• Physical interference
• Unlawful force against you

However, the situation changes significantly when we talk about deadly force.

When Is Deadly Force Legal in Missouri?

Deadly force is only justified in more serious situations.

In Missouri, you may use deadly force if you reasonably believe it is necessary to prevent:

• Death
• Serious physical injury
• A forcible felony (such as robbery or rape)

The keyword here is “reasonable.” That’s what investigators, prosecutors, and juries will evaluate. There may be no doubt you were truly afraid, but the question will be, “was it reasonable for you to be afraid?”

What Counts as “Reasonable?”

“Reasonable” doesn’t mean “what you believed,” it means what a reasonable person (with the same skills, abilities, disabilities, and knowledge as you), in your position, would have believed. And that belief has to be based on-you guessed it-reasons.

• What are the reasons you believed what you did, and
• Would another reasonable person have believed the same thing given the same reasons?

This is where many people get into trouble.

Examples that likely do not justify using deadly force:

• Verbal arguments
• Someone trespassing without threatening violence
• Minor physical altercations

Every situation is fact-specific, which is why understanding the law ahead of time matters.

Stand Your Ground Law in Missouri

Missouri is a stand your ground state.

This means:

• You are not required to retreat before using force, and
• You can defend yourself if you are in a place you have a legal right to be

However, this does not give unlimited authority to use force. All other requirements—innocence, imminence, reasonable belief, and proportionality—still apply.

And while you aren’t required to retreat, failure to do so can still be seen by a prosecutor or jury as unreasonable in some situations.

It may not be legally required, but avoiding a fight is the absolute best way to win a fight.

Castle Doctrine

Missouri law provides stronger protections when you are defending against someone who unlawfully enters:

• Your home (or dwelling)
• Your (occupied) vehicle
• Your business

In these situations, the law may presume that your use of force was reasonable and that you were the innocent party.

But again, this is not unlimited protection. The details of how and why force was used still matter. You are presumed to be reasonable, but that presumption can be countered.

Defending Property

Missouri law allows for the use of ordinary (non-deadly) force to defend your property from theft, damage, or destruction.

But Missouri law is clear that you cannot use deadly force to protect your property.

• If someone is trying to steal your unoccupied vehicle, deadly force would likely not be justified.
• If someone is trying to steal your occupied vehicle, deadly force may very well be justified. You’re not defending the vehicle, but the people inside it.

When You Cannot Claim Self-Defense

There are situations where self-defense protections may not apply.

You may lose the ability to claim self-defense if you:

• Were the initial aggressor
• Were committing a crime at the time
• Used force that was clearly excessive
• Acted unreasonably

These are some of the most common reasons self-defense claims fail.

Missouri Concealed Carry & Permitless Carry

Missouri allows permitless concealed carry, meaning:

• You do not need a permit to carry a concealed firearm

However, this does NOT mean:

• You can carry everywhere
• You are protected from legal consequences

There are still restrictions and important legal considerations.

Where You Cannot Carry in Missouri

Even with permitless carry, there are over a dozen restricted locations, including:

• Schools
• Certain government buildings
• Private property where prohibited

Violating these restrictions can lead to legal issues, even if your use of force would otherwise be justified.

What Happens After a Self-Defense Incident?

Many people focus on the moment of defense, but the aftermath is just as important.

After a self-defense incident:

• Law enforcement will investigate
• Your actions will be scrutinized
• You may be detained or questioned

Even a legally justified shooting can result in:

• Arrest
• Charges
• Civil lawsuits
• Significant legal fees

Skills with a firearm (Intro to Pistols and Advanced Pistol) are important, but so is the knowledge of when and how to use them (Missouri CCW and Defensive Pistolcraft).

Why Training Matters (Even Without a Permit Requirement)

Missouri doesn’t require a permit—but the law is still complex.

Training helps you:

• Understand when force is justified
• Avoid critical legal mistakes
• Make better decisions under stress

Most people who get into legal trouble didn’t intend to break the law—they just misunderstood it.

Get Practical Training in Southeast Missouri

If you’re in Southeast Missouri, including:

• Jackson,
• Cape Girardeau,
• Sikeston,
• Perryville,
• Poplar Bluff, or
• Farmington

You can get clear, practical instruction that goes beyond vague theory or telling war stories.

Our training focuses on the real-world application of Missouri law, so you understand not just what the law says, but how it actually works. All our firearms classes are built around teaching you legally justifiable skills and concepts, so you can be confident if you ever need to use them.

Register for a class today, or learn more about all the classes we offer.

• Missouri Concealed Carry Permit
• Intro To Pistols
• Advanced Pistols
• Defensive Pistolcraft

Frequently Asked Questions

Is Missouri a stand your ground state?

Yes, Missouri law does not require you to retreat before using force if you are lawfully present.

Can you shoot someone for trespassing in Missouri?

Not typically. Use of deadly force generally requires a threat of death, serious injury, or a forcible felony. Instead of asking, “Can I shoot this person?” we encourage asking, “Must I shoot this person?”

Do you need a concealed carry permit in Missouri?

No, Missouri allows permitless carry—but legal risks still exist.

What is the biggest mistake people make?

Misjudging what constitutes a “reasonable threat” and using too much force too early (or too late).

Important Disclaimer

This guide is for informational purposes only and is not legal advice. Laws change, and every situation is unique. Consult a qualified attorney for legal guidance.