How to Outline a Novel: 5 Structures That Actually Get You to the End

Last reviewed by Robert Prime — May 2026

Introduction

The single biggest cause of unfinished novels is the same problem at the same point: the writer hits the middle and doesn't know what happens next. Outlining solves this. The right outline tells you what the next scene is when motivation runs low.

But outlining has its own failure mode — over-planning. Some writers outline for months, polish the outline endlessly, and never write the book. The trick is to outline just enough.

This guide covers the five structures that work for almost every commercial novel, when to use each, and how long each outline should take.

Structure 1: The Three-Act Structure

The oldest and simplest. Three acts:

• Act 1 (0-25% of the book): Set up the world, introduce the protagonist, force a change with an inciting incident. End with the protagonist committed to the journey.
• Act 2 (25-75%): The bulk of the story. Protagonist faces escalating obstacles. A midpoint twist around 50% raises the stakes. By the end of Act 2, all is lost.
• Act 3 (75-100%): The protagonist gathers themselves, confronts the antagonist, and the story resolves.

Use it for: any commercial novel. It's the substrate beneath every other structure on this list.

Outline length: 1-2 pages. Three paragraphs, one per act.

Structure 2: Save the Cat (Blake Snyder)

A 15-beat sheet originally developed for screenwriting, now widely used in commercial fiction. Each beat happens at a specific percentage through the book:

Use it for: romance, thriller, mystery, action, anything aimed at commercial Amazon readers.

Outline length: 2-3 pages — one paragraph per beat.

Structure 3: The Snowflake Method (Randy Ingermanson)

Built layer by layer, from one sentence to a full outline:

1. One-sentence summary of the whole book (15 words max)
2. One-paragraph summary (expand the sentence)
3. One-page character sheet for each main character (motivation, conflict, epiphany)
4. One-page plot summary (expand the paragraph)
5. Half-page character sheet for each minor character
6. Four-page plot summary (expand the page)
7. List of every scene with POV and one-line summary

Use it for: literary fiction, complex multi-POV novels, sweeping family sagas, fantasy with worldbuilding.

Outline length: 8-15 pages. Takes 10-20 hours but produces a manuscript you can write in a sustained sprint.

Structure 4: The Story Circle (Dan Harmon)

Eight-beat circle drawn from Joseph Campbell, simplified by Rick and Morty creator Dan Harmon:

1. You — protagonist in a comfort zone
2. Need — they want something
3. Go — they enter an unfamiliar situation
4. Search — they adapt
5. Find — they get what they wanted
6. Take — they pay a heavy price
7. Return — they go back to their familiar world
8. Change — but they're transformed

Use it for: character-driven novels, coming-of-age, romance, anything where the protagonist's internal change matters more than external plot.

Outline length: 1 page. One sentence per beat.

Structure 5: The Hero's Journey (Joseph Campbell)

The 17-stage monomyth, condensed to 12 for modern fiction:

1. Ordinary World
2. Call to Adventure
3. Refusal of the Call
4. Meeting the Mentor
5. Crossing the Threshold
6. Tests, Allies, Enemies
7. Approach to the Inmost Cave
8. The Ordeal
9. Reward
10. The Road Back
11. Resurrection
12. Return with the Elixir

Use it for: fantasy, sci-fi, epic adventures, mythic stories. Not for cosy romance or domestic literary fiction.

Outline length: 3-5 pages — one paragraph per stage.

Which one should I pick?

Outlining non-fiction

For non-fiction, structure is even more important than fiction because readers can put the book down. The classic non-fiction structure:

1. Problem — the reader's pain point
2. Promise — what your book will deliver
3. Proof — your credentials and case studies
4. Plan — step-by-step solution

Each chapter follows the same structure in miniature: open with the chapter's problem, promise a solution, prove it with evidence, deliver the plan.

How long should outlining actually take?

For a first-time author writing a first novel: three to five hours. Beat sheet + scene list. Cap it at five hours. You'll learn more from writing chapter one than from polishing the outline a seventh time.

For Snowflake or layered outlining methods: 15-20 hours. Only worth it if you have a complex multi-POV book.

For non-fiction: 8-12 hours. Detailed chapter outlines pay off because non-fiction is harder to revise.

Common outlining mistakes

• Outlining instead of writing. If your outline has been "nearly done" for three months, you're procrastinating. Start writing.
• Treating the outline as sacred. It's a tool. If the story demands a change, change the outline.
• Outlining a sequel before finishing book one. You don't yet know how book one ends. Wait.
• Mixing structures. Pick one. Don't try to use Save the Cat and the Hero's Journey simultaneously — you'll over-engineer the story.

A template you can copy

For a commercial novel, this is the minimum viable outline (under three hours of work):

PREMISE (one line):

PROTAGONIST (one paragraph):
- Wants:
- Needs (different from wants):
- Backstory wound:

ANTAGONIST (one paragraph):

SETTING (one paragraph):

BEAT SHEET (Save the Cat, one line each):
1. Opening image:
2. Theme stated:
3. Catalyst:
4. Break into Act 2:
5. Midpoint:
6. All is lost:
7. Break into Act 3:
8. Finale:

SCENE LIST (one line per scene):
Chapter 1, Scene 1: [POV] [Location] — what happens
Chapter 1, Scene 2: [POV] [Location] — what happens
...

Fill that in. Start writing. Update the outline as the story changes.

Frequently asked questions

How do I know if my outline is good enough?

You can summarise the whole book in one breath without checking notes. If you can't, the structure isn't clear yet.

What if I outline and the story still doesn't work?

Most "story doesn't work" problems come from a weak protagonist (no clear want) or a weak antagonist (no real obstacle). Fix those before adding more beats.

Should I outline character arcs separately?

For commercial fiction: yes, briefly. For each main character — what do they believe at the start, what false belief drives their behaviour, what truth do they discover by the end.

Can I outline halfway through a draft?

Yes — many writers pants the first 30,000 words to find the voice, then outline the rest. This is a legitimate hybrid approach.

What software should I use to outline?

Notion, Scrivener, Google Docs, or a notebook. The tool doesn't matter. The outline matters.