How to Write a Summary: Step-by-Step Guide with Examples

Knowing how to write a summary is one of the most useful skills in school, work, and everyday reading. A good summary captures the main ideas of a text in your own words, so a reader gets the gist without going through the whole thing. This guide breaks the process into five simple steps, then covers how to start a summary, how long it should be, and the mistakes that cost the most marks.

If you’re not sure what counts as a summary in the first place, start with our guide on what a summary is. Otherwise, let’s get straight into the method.

What makes a good summary

Before the steps, it helps to know what you’re aiming for. A strong summary is:

• Brief — usually 10–30% of the length of the source material.
• Accurate — it reflects what the author actually said.
• Objective — it reports the ideas without adding your opinion.
• In your own words — restating ideas, not copying sentences.

Keep those four qualities in mind and the rest is just process.

How to write a summary in 5 steps

Most top guides and teachers agree on the same core sequence. These are the five steps of summary writing:

Step 1: Read the source material

Read the text once at normal speed to get the overall point. Then read it a second time slowly, marking the main ideas and important facts as you go. You can’t summarize what you don’t fully understand, so this first pass matters.

Step 2: Identify the main idea and key points

Ask the five W’s and the H — who, what, when, where, why, and how. The answers point you to the key points that carry the text. Everything else — examples, statistics, repeated ideas — is usually a detail you can leave out.

Step 3: Outline the main points

Make a short list or outline of the main points in the order they appear. This becomes the skeleton of your summary and stops you from wandering back into the original wording.

Step 4: Write the summary in your own words

Put the source away and write from your outline. Start with an introductory sentence that names the title, the author, and the central idea, then work through the key points. Write in the present tense (“the author argues,” “the article explains”) and use reporting verbs like presents, describes, argues, reports, and concludes. Because the source is out of sight, you’ll naturally write in your own words instead of copying.

Step 5: Revise and check

Compare your draft to the original for accuracy and neutrality. Trim anything that isn’t essential, then fix spelling, grammar, and punctuation. The finished summary should be much shorter than the source and still make sense on its own.

How to start a summary

The hardest part is often the first line. To start a summary, report the overall topic right away in a single sentence that includes:

• the title of the text,
• the author’s name, and
• the main point of the text as you understand it.

For example: “In ‘The Cost of Convenience,’ Jane Doe argues that single-use plastics create more long-term expense than they save.” That one sentence tells the reader what they’re about to get. From there, add the supporting key points in order.

How long should a summary be?

A common question is how long is a summary supposed to be — and the short answer is 10–30% of the length of the original. A one-page article might become a short paragraph; a full chapter might become a few sentences.

If you’re wondering how many sentences are in a summary, there’s no fixed number — it depends on the source. As a rule of thumb, a short article summary is 3–5 sentences, while a longer report might need one short paragraph per major section. Length should follow the content, not a quota.

Summary example (before and after)

Original (61 words):

The school board announced Monday that classes will start 30 minutes later beginning next fall. Officials cited research showing that teenagers benefit from extra morning sleep, which is linked to better focus and higher test scores. Bus routes and after-school sports schedules will be adjusted to fit the new timetable, though officials say the changes will be minor for most families.

Summary (24 words):

The school board will start classes 30 minutes later next fall, citing research that extra sleep improves teen focus and test scores.

Notice how the summary keeps the who, what, and why, drops the logistics, and stays in the present/future tense of the original claim.

Common mistakes to avoid

• Copying sentences from the source — that’s quoting, not summarizing.
• Adding your opinion — save reactions for a review or analysis.
• Including too many details — stick to the main ideas.
• Changing the meaning — accuracy comes before brevity.
• Making it too long — if it’s not much shorter than the original, keep cutting.

A faster way to summarize

Once you understand how to write a summary by hand, you can speed things up. Paste any text into our free AI text summarizer and it pulls out the key points in seconds. It’s a great way to draft a first version, check that you caught the main ideas, or condense long reports and PDFs — then refine the result in your own words.

Frequently asked questions

What are the 5 steps of summary writing? Read the source material, identify the main idea and key points, outline the main points, write the summary in your own words, then revise and check for accuracy.

How do you start a summary? Open with one sentence that states the title, the author, and the main point of the text. Report the overall topic right away before adding supporting details.

How long should a summary be? Usually 10–30% of the original length. A short article often needs just 3–5 sentences, while a longer text may need a short paragraph.

What are the basic rules of summarizing? Keep it brief, write in your own words, stay objective, and preserve the author’s original meaning.