One or two sentences capturing a screenplay's essence: the protagonist, their goal, the central conflict, and the stakes. It is the first thing buyers read and often the only thing they read before deciding whether to read the script.

What makes a logline sell?

A hook, the element of irony or collision that makes a listener lean in, on top of the four basics. High-concept loglines put a visible tension right in the sentence, like a hitman who must protect the witness he was hired to kill.

How long should a logline be?

One or two sentences. The hard part is subtraction: cut character names, subplots, and usually the ending. A logline is a distillation of the single spine, not a summary. Bloat signals a writer who cannot identify what the story is about.

What are common logline mistakes?

Being too vague to identify any one film, cramming in the whole plot, omitting stakes so there is no tension, and burying the hook under setup. Lead with the collision and make failure cost the protagonist something.

How do I test my logline?

Read it to someone who has not seen your script. If they immediately want to know more, it works; a polite nod means it does not. Then check that they can repeat it back accurately, because your logline must survive being passed person to person.

How to Write a Logline That Sells

The Most Important Sentence You Will Write

A logline is one or two sentences that capture the essence of your screenplay: the protagonist, their goal, the conflict, and the stakes. It sounds trivial next to a one-hundred-twenty-page script, but in 2026 it is arguably the most important thing a screenwriter writes, because it is the thing buyers read first and, often, the only thing they read before deciding whether to read anything else. A market that rewards high-concept ideas is a market that buys loglines before it buys scripts. Learning how to write a logline that sells is not a marketing afterthought. It is a core craft skill.

The reason is structural. An executive who likes your idea has to sell it upward, to the people who control money, and they sell it with your logline, often verbatim. If the idea cannot survive that one-sentence transmission, it dies in the room before anyone reads page one. Your logline is your concept's passport.

What a Logline Must Contain

A working logline answers four questions with ruthless economy.

Who is the protagonist, described by a defining trait rather than a name. "A name we do not know means nothing; "a disgraced detective" or "a sheltered teenager" instantly orients us.

What do they want, the clear external goal that drives the story.

What stands in the way, the central conflict or antagonist that makes the goal hard.

What is at stake, the cost of failure that makes us care.

Compress those four into one or two sentences and you have the skeleton. "A young FBI trainee must earn the trust of an imprisoned cannibal to catch a killer before he murders again" carries all four, which is why it works. The protagonist, the goal, the obstacle, and the stakes are all present and instantly legible.

The Hook: Why This One

A logline that only states the four elements is functional but forgettable. A logline that sells adds a hook, the element of irony, novelty, or collision that makes a listener lean in and think, I have not seen that. The hook is usually a tension between two ideas that do not normally go together.

Often the hook lives in the protagonist-goal pairing. A hitman who must protect the witness he was hired to kill. A wedding planner who falls for the groom. The friction in those pairings is the concept. When people say a script is high concept, they mean the hook is visible right there in the logline, no context required. Find the collision at the center of your story and put it in the sentence.

The Discipline of Leaving Things Out

The hardest part of writing a logline is subtraction. Your script has subplots, a rich supporting cast, a thematic argument, and a dozen turns you love. None of them belong in the logline. The logline is not a summary; it is a distillation of the single spine.

Cut character names. Cut the second and third storylines. Cut the ending, usually, since the logline sells the journey, not the destination. Cut adjectives that do not earn their place. Every word you remove makes the remaining words louder. A logline bloated with detail signals a writer who cannot identify what their own story is about, which is the opposite of the confidence you want to project.

Common Logline Mistakes

The vague logline. "A man goes on a journey of self-discovery" describes ten thousand films and sells none. If your logline could be attached to many movies, it identifies none.

The plot-summary logline. Trying to cram the whole story in produces a run-on that communicates nothing. Length is not thoroughness; it is failure to prioritize.

The no-stakes logline. If failure costs the protagonist nothing, there is no tension, and the listener has no reason to care whether they succeed.

The hidden-hook logline. Sometimes the concept is great but buried under setup. Lead with the collision; do not make the listener dig for it.

How to Test a Logline

Read it to someone who has not seen your script and watch their face. If they immediately want to know more, it works. If they politely nod, it does not. A strong logline produces an involuntary reaction, a raised eyebrow, a "wait, how," a smile. That reaction is the same one an executive needs to feel before they champion your script.

Then test it for transmission: can the listener repeat it back accurately a minute later. If they garble it, it is too complicated. The loglines that sell are the ones a stranger can carry to someone else without dropping anything, because that is exactly the journey your logline has to survive on its way to a yes.

Write the Logline First

A useful practice is to write the logline before the script, or at least early. If you cannot find a compelling one-sentence version of your idea, that is valuable information: the concept may not be as strong as you hoped, and better to learn it now than after a year of writing. The logline is not just a sales tool you bolt on at the end. It is a test of whether the concept is sound, applied before you commit your time.

:::insight{title="The logline formula, honestly"} Protagonist defined by a trait, a clear goal, a real obstacle, genuine stakes, and a hook, the collision that makes a stranger lean in, all in one or two sentences with everything else cut. If a listener can repeat it back and wants to know more, it sells. If not, fix the logline before you write the script. :::