What is the difference between a KO and a TKO in MMA?
B · Beginner · How fights end and how they are scored · 3 of 6A knockout is called when strikes leave a fighter unable to defend intelligently. A technical knockout is a stoppage because a fighter is not defending intelligently, whether from strikes, a cut, the corner giving up or the fighter not answering the bell. It also covers a stoppage on medical grounds. In every case the referee stops the fight.
How it works
- Knockout (KO): the referee stops the contest because the fighter cannot intelligently defend, due to strikes.
- Technical knockout (TKO), referee stoppage: the fighter is not intelligently defending.
- Its forms: strikes, a laceration, a corner stoppage or not answering the bell.
- TKO, medical stoppage: a laceration, a doctor stoppage or loss of control of a bodily function.
- Intelligent defence: the test in both definitions. A fighter must be doing something that works to protect themselves.
- After the stop: attacking an opponent who is under the referee's care is a foul.
- Replay: the ending may be reviewed once the fight has been stopped.
The glossary has the KO, the TKO, the intelligently defending, the corner stoppage, the doctor stoppage and the referee.
Tricky cases
A fighter is dropped and is awake, covering up while being punched. Can the referee stop it?
Yes. If the fighter is not intelligently defending, the referee stops the contest and it is a technical knockout.
Is there a standing eight count in MMA?
No. The rules have no count. A fight continues until the referee stops it, a fighter submits or time runs out.
A fighter cannot get off the stool for the next round. How is that recorded?
As a technical knockout: "Did not answer the bell" is listed among its forms.
A deep cut from a legal elbow makes the doctor advise a stop. What is the result?
A technical knockout, by laceration or doctor stoppage. A cut caused by a foul is handled differently, under the foul rules.
Why the rule exists
Without a count, as boxing has, MMA needs another way to decide when a hurt fighter has had enough. The test of intelligent defence gives the referee one: a fighter who is only covering up and absorbing blows is not defending, and each further strike adds harm and no information.
Where it differs
| Where | What changes | Source |
|---|---|---|
| Knockout | Cannot intelligently defend, due to strikes | ABC Types of decisions c |
| Technical knockout | Not intelligently defending; cut; corner; did not answer the bell | ABC Types of decisions b |
| Medical stoppage | Cut, doctor, loss of bodily function | ABC Types of decisions b; Accidental fouls 3 |
| Boxing | A count of ten on a knockdown | C |
From the rule book
Association of Boxing Commissions and Combative Sports, Unified Rules of Mixed Martial Arts (as amended 23 July 2024; California State Athletic Commission copy), the types of decisions (b and c), rule 2 and foul 25. Checked 14 October 2026. Official document: the association's Unified Rules of Mixed Martial Arts (adopted commission by commission).