Knowing how to write a summary is one of the most practical writing skills you can have. Students need it for coursework. Professionals need it for reports. Authors need it for book proposals and marketing materials.
A good summary distills the essential ideas of a source into a shorter form — without losing accuracy or adding your own opinion. It’s harder than it sounds, because it requires you to truly understand the material before you can condense it.
This guide walks you through the process step by step, covers different summary types, and includes templates you can use immediately.
What Makes a Good Summary
Before getting into the how, here’s what separates a strong summary from a weak one.
A strong summary:
- Captures the main idea and key supporting points
- Is significantly shorter than the original
- Uses your own words (not copied phrases)
- Maintains the author’s intent without adding your interpretation
- Follows a logical order
A weak summary:
- Includes too many minor details
- Copies the original language
- Inserts personal opinions
- Misses the central argument
- Is nearly as long as the original
The University of North Carolina Writing Center defines summarizing as a distinct skill that bridges reading comprehension and writing — you can’t summarize what you don’t understand.
How to Write a Summary: 6 Steps
This process works for summarizing any type of content — articles, books, reports, videos, or presentations.
Step 1: Read (or Review) the Full Source
Read the entire piece once without taking notes. Your goal is to understand the overall argument, narrative, or purpose.
Don’t start summarizing mid-read. You’ll emphasize early points too heavily and miss the conclusion’s significance.
Step 2: Identify the Main Idea
After your first read, answer this question in one sentence: What is this about, and what is the author’s main point?
This sentence becomes the backbone of your summary. Everything else supports it.
For a book, the main idea might be the central thesis (nonfiction) or the core story arc (fiction). For an article, it’s usually stated in the introduction or conclusion.
Step 3: Note the Key Supporting Points
Read through again, this time marking the 3-5 most important points that support the main idea. These are the arguments, evidence, or plot developments that the source couldn’t function without.
Ask yourself: If I removed this point, would the main idea still make sense? If yes, it’s a detail, not a key point.
Step 4: Write Your Draft
Using your main idea and supporting points, write the summary in your own words. Follow this structure:
- Opening sentence: State the source’s title, author, and main idea
- Body sentences: Cover each key supporting point in order
- Closing sentence: Wrap up with the author’s conclusion or significance
Write in present tense for most summaries (“The author argues…” not “The author argued…”).
Step 5: Compare Against the Original
Check your summary against the source:
- Did you capture the main idea accurately?
- Are the key points represented fairly?
- Did you accidentally copy any exact phrases? (Rephrase them.)
- Did you add any opinions or interpretations? (Remove them.)
Step 6: Edit for Conciseness
Cut anything that isn’t essential. Look for:
- Redundant phrases (“In my opinion, I think” becomes “I think” — or gets removed entirely since summaries shouldn’t include your opinion)
- Unnecessary qualifiers (“very,” “really,” “quite”)
- Details that support key points but aren’t needed to understand them
Your summary should be 10-25% the length of the original, depending on the type.
Summary Types and Templates
Different situations call for different summary formats.
Book Summary
Book summaries condense an entire book into a few paragraphs or a few pages. They’re used for book reports, book reviews, book proposals, and marketing materials.
Template:
[Book Title] by [Author] is a [genre/type] that [main idea or story premise]. The book [explains/explores/tells the story of] [central topic or character]. Key points include [point 1], [point 2], and [point 3]. The author concludes that [conclusion or resolution]. This book is relevant to [target audience] because [reason].
Example (nonfiction):
Atomic Habits by James Clear is a self-help book that presents a framework for building good habits and breaking bad ones. Clear argues that tiny changes compound over time and that focusing on systems rather than goals produces better results. He organizes his framework around four laws: make it obvious, make it attractive, make it easy, and make it satisfying. The book provides actionable strategies for each law. It’s most useful for readers who’ve tried to change their behavior and struggled with willpower-based approaches.
If you’re writing book summaries for your own book’s marketing, our guide on how to write a book description that sells covers that specific angle.
Article Summary
Article summaries are typically one paragraph. They’re common in academic work, professional communication, and research.
Template:
In “[Article Title],” [Author] [argues/reports/explains] that [main claim]. The article [provides evidence through/examines/analyzes] [key methods or evidence]. [Author] finds that [key finding 1] and [key finding 2]. The article concludes that [conclusion].
Executive Summary
Executive summaries are used in business contexts — reports, proposals, and strategic documents. They’re designed for busy readers who need the key points without reading the full document.
Template:
| Section | Content |
|---|---|
| Purpose | What this document addresses (1-2 sentences) |
| Key Findings | The 3-5 most important discoveries or recommendations |
| Methodology | How the information was gathered (1 sentence) |
| Conclusion | The recommended action or main takeaway |
| Next Steps | What should happen as a result |
Executive summaries typically run 1-2 pages for a 20+ page document. They should stand alone — a reader should be able to understand the essential information without reading anything else.
Chapter Summary
When working on a long writing project, chapter summaries help you track your narrative and ensure each section contributes to the whole. Writers working on books often create these during the outlining phase.
Template:
Chapter [X]: [Title] — This chapter covers [main topic]. The key points are [point 1], [point 2], and [point 3]. It connects to the previous chapter by [connection] and sets up [what comes next].
Summary Length Guidelines
How long should your summary be? It depends on the context.
| Source Type | Summary Length | Typical Use |
|---|---|---|
| Short article (500-1,000 words) | 2-4 sentences | Email briefings, research notes |
| Long article (2,000-5,000 words) | 1 paragraph (100-200 words) | Literature reviews, meeting prep |
| Book (50,000+ words) | 1-3 paragraphs (200-500 words) | Book reports, recommendations |
| Report (10-50 pages) | 1-2 pages | Executive briefings, proposals |
| Meeting or presentation | 3-5 bullet points | Follow-up emails, documentation |
The American Psychological Association recommends that academic abstracts (a specific type of summary) stay under 250 words.
Common Summary Mistakes
Mistake 1: Including Your Opinion
A summary reports what the author said, not what you think about it. Save your analysis for a review or response paper.
Wrong: “The author argues that remote work increases productivity, which I agree with based on my experience.”
Right: “The author argues that remote work increases productivity, citing a Stanford study of 16,000 workers.”
Mistake 2: Copying the Original Language
Even with attribution, using the author’s exact phrases throughout isn’t summarizing — it’s quoting. Rephrase ideas in your own words.
If you struggle with this, try writing your summary without looking at the original. Use only your notes from Step 3.
Mistake 3: Including Too Many Details
The most common summary error is treating every detail as essential. A summary of a 300-page book shouldn’t cover every chapter. Focus on the main argument and the 3-5 most important supporting points.
Mistake 4: Losing the Main Idea
Sometimes writers get so focused on individual points that they forget to clearly state the overarching theme. Always lead with the main idea.
Mistake 5: Wrong Proportions
If the original devotes 60% of its space to one argument and 10% to another, your summary should roughly reflect those proportions. Don’t give equal weight to minor and major points.
Summary Writing for Authors
If you’re writing a book, summary skills come into play in several specific ways.
Book Proposals
Literary agents and publishers expect a synopsis — essentially a detailed summary of your entire book. This is a specialized form of summary that requires balancing completeness with conciseness. Our guide on how to write a book synopsis covers this in detail.
Back Cover Copy
The description on your book’s back cover is a type of persuasive summary. It needs to convey the book’s essence while making readers want more. This is a blend of summary and persuasive writing style.
Chapter Outlines
Before or during writing, many authors summarize each planned chapter in 2-3 sentences. This creates a roadmap for the project. See our book outline template for a structure that works.
Marketing Summaries
After publication, you’ll need various-length summaries for Amazon descriptions, social media, email newsletters, and press materials. How to write a book description that sells covers the marketing angle.
If you’re working on a book and want tools that help with structure and drafting, Chapter.pub assists with everything from outlines to finished chapters. Over 5,000 books have been created on the platform.
Practice Exercise
Try this exercise to build your summary skills:
- Find any article between 1,000-2,000 words on a topic that interests you (The Atlantic, Harvard Business Review, or Wired all work well)
- Read it once without notes
- Write down the main idea in one sentence
- List 3-5 key supporting points from memory
- Write a one-paragraph summary (100-150 words)
- Compare your summary against the original for accuracy
Repeat this weekly and your summary skills will sharpen quickly. For more structured exercises, our practice writing worksheets include additional summary drills.
Quick Reference: Summary Checklist
Use this checklist before submitting or publishing any summary:
| Checkpoint | Done? |
|---|---|
| Main idea is stated clearly in the opening | |
| Key supporting points are included | |
| Written in your own words (no copied phrases) | |
| No personal opinions or interpretations added | |
| Significantly shorter than the original | |
| Follows a logical order | |
| Author and source title are identified | |
| Present tense used consistently | |
| Proofread for grammar and clarity |
Summary writing is a skill that improves everything else you write. It trains you to identify what matters, cut what doesn’t, and communicate efficiently. Whether you’re summarizing a meeting, a book, or a research paper, the process is the same: understand first, then condense.
Start with one article today. Summarize it. Then do it again tomorrow with something new.
