Loglines vs. Taglines: How to Hook Buyers on Your Film's Sell Sheet

"In space, no one can hear you scream."

"A crew of deep-space miners answers a distress call and brings something back with them — now the crew's only survivor must outlast the creature hunting them through the ship."

Both describe Alien. Neither could do the other's job. The first is a tagline; the second is a logline — and confusing them is one of the most common ways writers weaken their own pitch materials. A one-pager or sell sheet that opens with a tagline where a logline belongs tells the reader, in the first line, that the writer does not know how the industry reads.

Here is the difference, and how to write both.

What Each One Is For

A logline is a decision tool. It exists so a producer, executive, or agent can decide — in one sentence — whether the story is worth their time. It is read by professionals evaluating material, and it is judged on information: who, what, against what, and why this version is different.

A tagline is a marketing tool. It exists to make an audience curious about a finished film — on a poster, a trailer card, a streaming thumbnail. It is judged on feeling: mood, tone, intrigue.

The practical test: a logline must let a stranger picture the story. A tagline must let a stranger feel the movie. "A boy befriends a stranded alien and helps him home while government agents close in" is a logline. "He is afraid. He is alone. He is three million light years from home." is a tagline. Swap them and both fail.

Writing the Logline

A working logline has four parts, usually in this order:

1. The protagonist — described by trait, not name. "A grieving paramedic," not "Dana."
2. The inciting disruption — the event that starts the story.
3. The goal — what the protagonist sets out to do.
4. The obstacle or antagonist — what stands in the way.

Then the fifth, invisible ingredient: the hook — the element that makes this telling different from every similar film. Sometimes it lives in the protagonist ("a marriage counselor who can hear her clients' thoughts"), sometimes in the world, sometimes in an irony built into the setup.

Length discipline: one sentence, under forty words. Two sentences is a mini-synopsis; three is a paragraph. The constraint is the craft — a logline you cannot compress is usually a story you cannot yet summarize, which is a story problem, not a writing problem.

Common logline failures:

• Vague stakes. "…must confront her past" describes every third script ever written. Confront it how, against whom, with what consequence?
• Name-dropping characters. Names carry no information to a stranger. Traits do.
• Listing events. "Then… then… then…" is a synopsis compressed, not a logline. One sentence means one throughline.
• Promising tone instead of story. "A hilarious, heartwarming journey" is a tagline wearing a logline's clothes.

Writing the Tagline

Taglines work by compression of mood, not story. The reliable patterns:

• The paradox. "In space, no one can hear you scream." Sets a rule, then breaks it.
• The scale claim. "He is three million light years from home." One concrete, enormous fact.
• The double meaning. "The list is life." (Schindler's List) — plain words that deepen after the film.
• The warning or invitation. "Be afraid. Be very afraid." (The Fly)

Common tagline failures:

• Explaining the plot. The moment a tagline contains a goal and an obstacle, it has become a bad logline.
• Generic menace or uplift. "Some secrets won't stay buried" could sit on ten thousand posters. If your tagline fits any film in the genre, it fits yours no better than the others.
• Length. Taglines over ten words stop being taglines.

Where Each One Belongs

On a one-pager or sell sheet: the logline leads, directly under the title. A tagline may appear above the title as a flavor line — but never in place of the logline, and never both competing for the same space.

On a pitch deck cover: the tagline. The cover is a poster; it sets tone. The logline belongs on the page inside, where the reader switches from feeling to evaluating.

In a query email: the logline, in the first two sentences. The subject line, if you use one creatively, behaves like a tagline.

In conversation: the logline, spoken. If you cannot say it in one breath, it is not finished.

A Working Exercise

Take your project and write five loglines and five taglines. For the loglines, force each draft through a different door: one led by the protagonist's trait, one by the disruption, one by the irony, one by the stakes, one by the world. For the taglines, write one paradox, one scale claim, one double meaning, one warning, and one wildcard. Most projects discover their sharpest framing somewhere in that exercise — and it is rarely the version they started with.

Narratora generates both from your actual screenplay: the One-Pager workflow builds the logline-led sell sheet, and the Film & TV Pitch Deck opens with a poster-style cover carrying the tagline — each grounded in the story you wrote, not generic genre language. See real samples on our Samples page, or start a trial and test yours.

The poster sells the feeling. The logline sells the story. Know which one you are writing.