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How-to · 2026

How to Write an Executive Summary

It is not an introduction and it is not an abstract. It is the version your reader will act on if they read nothing else — which, often enough, is what happens.

By Ed · Published September 19, 2026 · 7 min read

Twenty-five years starting companies, consulting, owning a multi-million-dollar P&L and leading business intelligence for large enterprises.

An executive summary answers one question: if the reader reads nothing else, what must they know and what should they do? Everything below follows from that, including the parts that feel backwards — conclusion first, method never, and written last.

What it is for

The name is literal. It is a summary for someone who will not read the document. Not because they are careless, but because they are deciding between eleven things this week and yours is one of them.

That makes it different from two things it gets confused with. An introduction prepares a reader for what follows and is meaningless on its own. An abstract describes what the document does — "this report examines..." — without saying what it found. An executive summary says what was found and what to do about it, and stands alone.

The test: cut your summary out, hand it to someone who will never see the document, and ask what they would do next. If they cannot answer, you have written an introduction.

The structure

Five parts, in this order.

1. The conclusion, in the first sentence

Not the background. Not the scope. The answer.

Weak: "This report reviews sales performance for the first three quarters of 2026 across all product categories."
Better: "Sales are 8% ahead of plan year to date, entirely on the strength of one category; the other three are collectively 12% behind and Accessories is the reason the total still looks healthy."

The second one has already earned the next thirty seconds.

2. The situation, in two or three sentences

Only what the reader needs to make sense of the conclusion. The period, the scope, the problem that prompted the work. Not the history of the project and not who commissioned it.

3. The two or three numbers that carry it

Pick the fewest figures that make the argument stand up, and give each one its comparison. A number with nothing to compare it to is decoration: $2.4m in Q3 means nothing, $2.4m in Q3, up 11% on Q2 and 4% behind plan is an argument.

4. The recommendation

What should happen, who does it, and by when. If there is a decision you need from this reader, ask for it explicitly. Summaries that end on a finding rather than a request are why nothing happens after the meeting.

5. What it takes

The cost, the resource, the risk, the trade-off. A recommendation without its price reads as optimism, and experienced readers discount it.

How long

Five to ten percent of the document, and rarely over one page. A twenty-page report gets a page. A hundred-page one gets two or three, not ten.

If it will not fit, the usual cause is that method has crept in. How you did the analysis belongs in the body. The summary carries what you concluded and what you are asking for.

What gets a summary skipped

Burying the conclusion in paragraph four. By then the reader is scanning.
Hedging. "The data may suggest a possible trend" tells the reader you will not stand behind it, so they stop reading. If the finding is uncertain, say how uncertain and move on.
Every number you have. Fifteen figures is a table, not an argument. Three, each with a comparison.
Jargon and acronyms. The executive summary is the one part read outside your function.
Writing it first. It then summarises what you set out to find.
Recycling last quarter's. Nothing is more visible than a summary whose conclusion did not change while the numbers under it did.

When you write the same summary every month

The advice above is for a document written once. A monthly or quarterly pack is a different animal: the structure is settled, and the work is finding out what changed and whether last month's conclusion still holds.

Done by hand, that means rebuilding the numbers, re-reading the charts, and rewriting a page of prose to match — which is exactly where a stale figure slips through, because the number in the summary and the number in the chart on page nine came from two different passes over the data.

Generating the summary from the numbers themselves

If the pack is built from data you already have in one place, the summary can be produced from the same pass that produced the charts. That is what the Quiriz add-ins do in PowerPoint, Google Slides, Word and Google Docs: every chart and table remembers the question behind it, and the executive summary is written from what those slides or sections actually showed — then rewritten last, from the same figures, whenever the pack is refreshed.

What that fixes is not the writing. It is the agreement: the figure in the summary, the chart it refers to and the commentary underneath it all come from one reading of the data, so a restated month cannot leave one of the three behind.

What it does not fix: a summary is an argument, and the judgement in it is yours. A generated one gives you the findings with the numbers attached. Deciding which of them matters enough to put in the first sentence is the part that is actually your job.

Stop rewriting the same summary

Build the pack from your data once — charts, tables and the executive summary — then refresh the whole thing next month in a single press. Free to start.

Try Quiriz free →

Frequently asked questions

How long should an executive summary be?

Roughly five to ten percent of the document, and rarely more than one page. A twenty-page report gets one page; a hundred-page one gets two or three at most. If it runs longer, it has stopped being a summary and become a condensed version of the report, which nobody reads either.

What is the difference between an executive summary and an introduction?

An introduction sets up what the document is going to do and is written to be read before the rest. An executive summary gives the conclusions and recommendations and is written to be read instead of the rest. The test: if your summary makes no sense without the document that follows, it is an introduction.

Should an executive summary be written first or last?

Last, always. It has to state conclusions, and you do not have conclusions until the analysis is finished. Drafting it first is a useful planning exercise, but the draft should be thrown away and rewritten once the findings are real.

What should an executive summary contain?

Five things: the conclusion or recommendation up front, enough context to make it make sense, the two or three numbers that carry the argument, what you are asking the reader to do, and what that will take. Everything else — method, caveats, workings — belongs in the body.

How do I write an executive summary for a business plan?

Same structure, different contents. Lead with what the business does and the opportunity in one sentence, then the market, the traction or evidence you have, the team, the financial ask and what it buys. A reader who stops after that page should be able to decide whether to take the meeting.