An executive summary is a short note at the front of a long document that tells a busy person what happened, why it happened, and what you want them to do next.
Think of a recipe book with a sticky note on the cover that says “the chicken one on page 40 is the good one, buy lemons.” The sticky note is the executive summary. The book is the report.
Agencies write two versions. One goes at the top of the report you send a client every month. The other goes at the top of a pitch, when you’re trying to win the account in the first place.
An agency with 25 clients on monthly reporting writes 300 of these a year.
That number is the real problem. Nobody struggles to write one good summary when a $500K account is on the line.
The struggle is the other 299. The ones typed at 11pm on the second Tuesday of the month, when you already know what happened and just need to say it.
Those summaries do more work than the reports underneath them. A client who reads one section of a monthly report reads that one.
Full disclosure before we go further. I work on Swydo, a reporting tool for agencies, and this article shows you how to do part of this inside it. The writing advice works no matter what software you use.
By the end you’ll have a four-line structure to use on next month’s report, a realistic time cost per client, and a version that works for pitching new business.
We’ll get there in that order, with the mistakes that get summaries skipped at the end.
What an Executive Summary Is and How Long It Should Be
An executive summary squeezes a long document down to the smallest number of words a decision-maker needs in order to act on it.
One page is the ceiling for any of them. That’s the outer limit, not the target.
A monthly client report summary should run much shorter. Somewhere around 150 to 250 words, which is one screen on a phone.
The reason it can be that short is that the client already knows the account. You’re not introducing anything. You’re telling them where things landed.
You may have seen a rule that says an executive summary should be 5 to 10% of the document’s length. That rule comes from long documents, like business plans and government reports.
It doesn’t scale down to something you send every month. Ignore it here.
Why People Skim Instead of Read
Nobody reads your summary word by word, and it’s worth knowing why before you write one.
Nielsen Norman Group, a research firm that studies how people use screens, ran an eyetracking study with 232 people. Eyetracking means they used a camera to record exactly where each person’s eyes went on the page.
What they found is that people don’t read down the page evenly. They read across the top, drop down and read a shorter line across, then run their eyes straight down the left edge. On a heat map it looks like the letter F.
Two fair warnings about that study. It was about web pages, not PDFs. And the research firm itself has since said people over-apply the F-pattern to situations it doesn’t fit.
So take only the narrow finding, which is solid on its own. The first line of a block gets read properly. Attention falls off fast after that.
Which means the most important number in your summary goes in the first sentence. Not the third paragraph.
The Two Kinds of Executive Summary Agencies Write
The monthly report summary and the pitch summary look similar on the page and do completely different jobs.
The difference comes down to what the reader already knows about you.
| Monthly report summary | Pitch summary | |
|---|---|---|
| When you write it | Every month, for every client | Once, when chasing a new account |
| What the reader knows already | The account, the budget, last month’s numbers | Almost nothing about you |
| The job it does | Say where things landed and what happens next | Prove you understand their business |
| How long | 150 to 250 words | 250 to 400 words |
| How it ends | A decision you need from them | A specific next step |
| How many you write | 300 a year at 25 clients | However many you pitch |
Both need the same thing in the opening line. A number, and whether that number is good news.
The Four Lines Every Monthly Report Summary Needs
A monthly summary answers four questions, in order, and it’s done when all four are answered. Result, Reason, Risk, Request.
Most agency summaries answer the first two and stop there. That’s what makes them read like a recap instead of something worth a client’s attention.
Result
Open with the one number that answers “did we hit it.”
Not a list of five metrics. The single number that matters to the person who signs your invoice, compared against the target you agreed on before the month started.
A target is just the number you and the client said you were aiming for. Without it, a result is only a number. With it, the client instantly knows whether to be pleased.
Here’s the line, using a client running ads to collect sales enquiries.
“Leads came in at 412, against a target of 350 and up 18% on August.”
A lead, in case it means something different at your agency, is one person who filled in a form or called. Someone who raised their hand.
If you don’t know which number matters most to a given client, the summary isn’t your problem. Go sort the report out first, starting with the marketing KPIs your client really cares about.
Reason
One sentence on what caused the result. Not a list of everything you did that month.
This is the line that shows you understand the account instead of just measuring it.
“Most of that came from the retargeting audience we rebuilt in week two, which converts at nearly double the prospecting rate.”
Two words in there are worth explaining, because plenty of clients nod along without knowing them.
Retargeting means showing ads to people who already visited the client’s website. They’ve heard of the business, so they say yes more often.
Prospecting means showing ads to complete strangers who’ve never heard of the client. Necessary, but a harder sell, so it costs more per result.
Pick the single biggest cause. If two genuinely tie, name two. Three starts to sound like you’re covering yourself.
Risk
Name the thing that’s wobbling.
Every account has something fragile in it, and the client usually half-suspects it already. Telling them first is worth more than any win you report.
“The risk is that cost per lead has climbed 9% in the last ten days as that pool burns out.”
Cost per lead is what you spent divided by how many enquiries you got. Lower is better.
“The pool burns out” means the group of people you were advertising to is small, you’ve now shown them the ad many times, and they’ve stopped responding. Each new enquiry starts costing more.
Agencies skip this line because it feels like confessing. It reads as competence.
The client who spots a problem before you mention it is the client taking calls from other agencies by spring.
Request
End with what you need from them.
An approval, a decision, an asset, a budget change, or an honest “nothing needed this month.”
“We want to shift $2,000 from prospecting into a lookalike build before it does. Reply by Friday and it’s live Monday.”
A lookalike build is where the ad platform takes your existing customers and goes looking for strangers who resemble them. It’s a way to find fresh people without starting from scratch.
A summary that asks for nothing teaches the client that these emails need no reply. Once they’ve learned that, they stop opening them.
How to Write One in About Ten Minutes
Ten minutes is realistic once the report is already built and the targets are already set. Getting to that point is most of the actual work, and it’s a one-time job per client.
The five steps below cover writing it, putting it where the client will see it, and finding out whether they did.
1. Decide the One Number Before You Start Writing
Your first line needs a target, not just a result. 412 leads means nothing on its own. 412 against 350 means something immediately.
Set that target once and it carries forward every month.
In Swydo, targets live under Monitoring, in a section called Goals. Open Monitoring → Goals → +New Goal, pick the client, pick where the data comes from, pick the metric, then set the number you’re aiming for and the time period.
Each goal then shows one of three labels. On Track, Off Track, or Achieved. An overview screen lists every client’s goals together with color-coded progress bars.
The point of setting it up this way is that by the time you sit down to write, the first line of the summary has already been decided for you.
2. Let AI Write a Rough Draft, Then Cut It in Half
A blank box at 11pm is what makes this job feel heavy. A bad draft you can hack at is a completely different job.
Swydo has a writing assistant built into the report itself. It reads the numbers already in that report and drafts text about them.
It comes with four ready-made requests you can click instead of typing your own. Summary, Wins, Issues, and Recommendations.
Run Summary for your Result and Reason lines. Run Issues for the Risk line.
There’s a paperclip icon that lets you point it at one part of the report. Use it, or it’ll summarize everything and you’ll get a draft about the whole account when you only wanted the paid ads section.
It writes in Dutch, English, French, German, Spanish and more, which matters if your team works in one language and your client reads another.
Now the important part. Cut it.
AI drafts run long and hedge everything. Delete any sentence that doesn’t answer one of the four questions. Then delete the adverbs from whatever survives.
You’ll usually lose about 40% of the words and none of the meaning.
3. Put the Summary in the Email, Not Just the Report
Plenty of clients read your email and never click through to the report at all.
A summary sitting at the top of a report they didn’t open is a summary nobody read.
A scheduled report, if the term is new, is one that sends itself on a set day each month without you touching it.
Swydo lets you drop the AI-written summary directly into that email. Open the email editor for the report, click + at the top, and choose the AI summary block. Drag it wherever it fits.
For scheduled reports it then rewrites itself with fresh numbers on every future send. You set it up once per client and it keeps going.
I think this is the highest-return change most agencies can make to their reporting. It takes about two minutes per client.
4. Give the Client One Link Instead of Three
A client holding three different links from you will pick one and ignore the rest. Usually whichever was in the most recent email.
Swydo’s Client Portal puts everything behind a single web address. Reports, Boards, and Goals, all in one place.
Boards are quick one-screen views of a client’s main numbers, lighter than a full report. Goals are the targets from step one.
You choose exactly what each client sees. Open their account, go to the Portal tab, switch it on, tick what to include, and preview it as they’ll see it before sending.
Add a password when the account needs one. If a contact leaves the client’s marketing team, regenerate the link and the old one stops working straight away.
Your summary sits at the top of the report inside that portal, and the client stops asking which link they were supposed to use.
5. Find Out Whether Anyone Read It
You’ll write differently once you know who’s actually reading.
Swydo keeps a Send Log, under Reports. It’s a delivery record. For each report it shows whether it arrived, whether the recipient opened the email, and whether they clicked through.
Two months of that tells you more about your writing than any style guide.
Watch for the client whose open rate is high and click rate is zero. That client is reading your summary and nothing else, which means your summary is now the whole report as far as they’re concerned.
Write it accordingly.
What Changes When You Write 300 of These a Year
At volume, the question stops being how well you write one summary. It becomes whether your whole team writes all of them the same way.
A summary from your newest account manager should have the same shape as one you wrote yourself.
Three things hold that together.
- Save the requests that work. When a particular AI request produces a clean draft for one paid social client, use the identical request for all of them. A new hire’s first summary then comes out looking like everyone else’s.
- Keep the summary in the same spot. Top of the report, top of the email, every month. Clients learn where to look and stop hunting.
- Standardize the targets, not the wording. Marketing report templates handle the layout. The four lines handle the writing. Neither should be reinvented per client.
What the Software Won’t Do for You
The report builder handles a lot of the assembly. A few pieces stay your job, and knowing which is which upfront saves a confusing afternoon.
Start with the text box your summary goes in. The AI Report Builder can put a whole report together from a written instruction, but that text box is one you add yourself.
Four other pieces work the same way. The names won’t mean much unless you already use them, so here they are in plain terms.
- Custom metrics are numbers you invent by combining others, like profit per lead.
- Combined data sources merge several ad platforms into one chart, so Google and Facebook spend sit side by side.
- Manual KPIs are numbers you type in yourself, for anything that doesn’t connect automatically, like offline sales.
- Filters cut a report down to one slice, such as a single campaign.
Build those into the client’s report once, when you set the account up. They carry forward every month afterward, and the AI works on top of them from then on.
Two things to know about where this work happens. The builder doesn’t operate inside templates, so do it in the report itself.
The AI also can’t look at two of a client’s reports at once. A client with a paid report and an SEO report gets two summaries, and you join them together yourself.
The short version is that the builder assembles the report and you supply the summary. I’d argue that’s the right split, but it does surprise people expecting the whole thing to be hands-off.
How the AI Usage Allowance Works
The second limit is the usage allowance, and it works a bit like minutes on a prepaid phone plan.
Every Swydo plan includes 4,000 AI credits a month. A credit is just a unit of usage, and a typical report summary uses about 95 of them.
That’s roughly 42 summaries a month inside the included allowance. Credits reset each month and don’t roll over.
If you go past 4,000, you set your own monthly spending limit and get billed on what you actually used, rather than paying up front for capacity you might not touch.
Do the sum for your own agency. 25 clients getting one summary each per month sits comfortably inside the included 4,000. Weekly summaries across 30 clients does not, so work out what that extra is worth before you promise a client weekly.
On price, so you can run your own numbers. Swydo is $69 a month, or $62 a month if you pay annually.
That includes 38 integrations and your first 10 data sources.
A data source is one connected account. So a single client’s Google Ads and their Google Analytics count as two.
How to Write the Pitch Version
A pitch summary has a harder job, because the reader doesn’t know you and hasn’t agreed to anything yet.
It has to prove you understand their business before it proposes anything.
The structure runs in five beats.
- Their problem, in their own numbers. Not “you face challenges with customer acquisition.” Something specific enough that they can tell you actually looked.
- What that problem costs them. Put a figure on it, and be conservative. An inflated number reads as a sales trick and gets your whole document discounted.
- What you’d do about it. Two sentences, tied to their situation. A generic three-phase method signals you’ll run the same playbook you ran for everyone else.
- One reason to believe you. One comparable client, one real outcome. One. Four proof points weaken each other.
- The next step, with a date on it. A call, a meeting, an audit. Something they can agree to in one line of reply.
Two cautions.
Write the summary last, after the full proposal exists. Otherwise the summary promises something the proposal doesn’t deliver, and that gap is exactly what a careful buyer notices.
And keep every projection tied to work you’ve actually done. A CMO who checks one of your numbers and finds it invented will discount every other number on the page.
The tone rule matches the monthly version. Write about their business, not your agency’s history.
A prospect who reads “founded in 2018, we’re a full-service agency” in line one has already worked out that this document is about you.
Five Mistakes That Get Summaries Skipped
Weak summaries tend to fail in the same handful of ways, and all five are fixable in the draft you already have.
Leading with activity instead of outcome. “This month we optimized campaigns and refreshed creative” tells the client what you did with their money, not what they got for it.
Too many numbers at once. Six figures in the first three sentences forces the reader to work out which one matters. That’s your job. One number up front, the rest in the report body. If you’re unsure which ones earn a spot, what to include in a marketing report is a sensible filter.
No bad news anywhere. A summary with nothing fragile in it reads as either dishonest or not paying attention. The client can’t tell which, and both are bad.
Words the client doesn’t use. You’re closer to the daily work than they are. Read it once out loud and cut any acronym you wouldn’t say in their office.
No ask at the end. “Let us know if you have questions” gets no reply. A client who hasn’t replied in four months is a client who has quietly checked out.
Worth sitting with for a second. When did a client last reply to one of your monthly reports? If the honest answer is “when something went wrong,” the summary isn’t earning its place.
Executive Summary FAQ
Direct answers to what agencies and clients actually ask about executive summaries
An executive summary is a short section at the front of a longer document that tells a busy reader what happened, why it happened, and what you want them to do next. It is written to be read on its own, without the document underneath it.
Marketing agencies write two kinds. One goes at the top of the report a client gets every month. The other goes at the top of a pitch for new business. They look alike and do very different jobs, because the second reader has never met you.
The purpose is to let someone decide something without reading the full document. Not to tease the report, not to introduce it, and not to list what is inside it.
That distinction changes how you write. If your summary makes sense only as a lead-in to page four, it has failed. A senior person should be able to read it alone, understand the position, and act.
An introduction sets up what the document is about. An executive summary gives away the ending. An introduction says “this report covers last month’s paid search performance.” A summary says “leads came in 18% ahead of target, and here is what we need from you.”
Agencies mix these up constantly, and it is the most common reason a summary gets skipped. If yours could be swapped for a table of contents without losing anything, you wrote an introduction.
An executive summary drives a decision and usually ends by asking for something. An abstract, the kind on a research paper, neutrally describes what was studied and what was found, and asks the reader for nothing.
Summaries take a position. Abstracts stay balanced. If your client report summary reads like an abstract, it is accurate and useless.
Usually the most senior person on the client side, and often only them. The marketing manager who works with you daily reads the whole report. Their boss, who signs off on the budget, reads the summary and nothing else.
Write for the second person. They have less context, less time, and more say over whether your retainer survives the next budget review.
Whoever knows what to do next about the account. That is the test, not seniority. The result and the reason can be pulled from the data by anyone. The risk line and the request line need someone who knows the client’s budget cycle and what you are planning.
If a junior account manager can write all four lines, they are ready to own the account. If they can only write the first two, the summary needs a second pair of eyes before it goes out.
One page is the hard ceiling. A monthly client report summary should be far shorter than that, around 150 to 250 words, because the reader already knows the account and needs no introduction.
The rule you may have seen about 5 to 10% of the document’s length comes from long one-off documents like business plans. It does not scale down to something you send the same person twelve times a year.
| Document | Summary length | Reason |
|---|---|---|
| Monthly client report | 150 to 250 words | Reader knows the account already |
| New business pitch | 250 to 400 words | Reader knows nothing about you |
| Business plan or annual review | One to two pages | Genuinely more ground to cover |
Paragraphs, for a monthly client summary. Bullets look scannable but they strip out cause and effect, which is the part the client is paying you for.
A bullet saying “leads up 18%” next to a bullet saying “cost per lead up 9%” leaves the reader to work out how those connect. A sentence can say one caused the other. Save bullets for the report body, where the numbers speak for themselves.
Not at 200 words. Headings on something that short add clutter and make it look longer than it is.
Past roughly 350 words, which usually means a pitch summary, bold lead-ins at the start of each point help the reader scan. Full headings are still overkill.
One, at most, and only if it says something the sentence cannot. A single number against its target does not need a chart. A twelve-month trend line sometimes does, because the shape of it is the point.
The failure mode is pasting a dashboard screenshot into the summary. That is not a summary, it is the report arriving early, and it forces the reader to do the interpreting you were hired to do.
Past tense for what happened, present tense for what is true now, and first person plural for what you did. “Leads came in at 412. Cost per lead is climbing. We want to move $2,000 into a new audience.”
Avoid writing about your agency in the third person. “The agency recommends” sounds like a legal filing and puts distance between you and the client at the exact moment you want less of it.
Anything that is not already in the report underneath it. A summary is not the place to introduce a new idea, a new number, or a new recommendation the client will not find explained anywhere else.
Beyond that, cut the process detail, the list of tasks completed, and any praise for your own team. The client is buying outcomes, not a timesheet.
| Include | Leave out |
|---|---|
| The headline number against its target | Every other metric in the report |
| The main cause of the result | The full list of what your team did |
| What is currently at risk | Reassurance with nothing behind it |
| The decision you need | “Let us know if you have questions” |
Start with one number, measured against the target you agreed on. Not a list of metrics, and not a sentence about what your team did.
Leads came in at 412, against a target of 350 and up 18% on August.A target is just the number you and the client said you were aiming for before the month started. Without it, a result is a figure floating on a page. With it, the client knows in one second whether to be pleased.
Four things, in this order. The result against target. The main reason it moved. The biggest thing currently at risk. And what you need from the client. Result, Reason, Risk, Request.
Most agency summaries answer the first two and stop, which is why they read like a recap. The third and fourth lines are what turn a report into a conversation.
Last, every time. Write it once the report or proposal is finished, so it describes what the document actually says rather than what you planned it to say.
Summaries written first tend to promise something the document underneath does not deliver, and that gap is exactly what a careful client notices.
About ten minutes, once the report is built and the target is set. Setting those up takes longer, but it is a one-time job per client rather than a monthly one.
Run the sum for your own agency before deciding how much this matters. Twenty-five clients on monthly reporting is 300 summaries a year, which is why having a fixed structure beats writing each one from scratch.
Reuse the structure, never the sentences. The same four questions every month is what makes your reports easy to read. The same phrasing every month is what makes clients stop reading them.
Watch for the tell. If your last three summaries all open with “this month we saw strong performance across,” the client has learned that the first line carries no information and their eye now skips it.
Change the opening number, keep the structure. A finance director’s version opens with cost or revenue. A marketing director’s opens with pipeline or brand numbers. The four lines underneath stay the same.
Writing one summary that tries to satisfy everyone produces a summary that satisfies nobody. If two stakeholders genuinely need different headline numbers, write two openings and reuse the rest.
It can write the draft, and a rough draft you can cut beats a blank page. The result and reason lines come out well because both are already sitting in the report data.
The risk and request lines still need you. Those depend on things the software cannot see, like the client’s budget cycle or the fact that their new marketing director starts in three weeks. Expect to delete roughly 40% of any AI draft, because they run long and hedge.
Same four lines, and you still lead with the number. State the shortfall in the first sentence, name the specific cause, separate what you controlled from what you did not, and end with what you are doing about it and by when.
Leads came in at 268, against a target of 350. Two thirds of the gap traces to the landing page outage on the 8th, which cost us nine days of the month’s best traffic. We have moved the remaining budget into November and expect to recover the shortfall by the end of the quarter.Clients rarely leave over one bad month. They leave over vagueness and silence about a bad month, because that is when they start assuming the real story is worse than what you told them.
In the summary, in the first line. Burying a shortfall on page four does not soften it. It only guarantees the client finds it themselves, which turns a performance problem into a trust problem.
There is a practical reason too. The client who reads only the summary is usually the most senior one. If the bad news is not there, they will hear about it secondhand from their own team, and you will have no say in how it gets described.
Name the external cause plainly, then say what you are doing anyway. An algorithm update, a platform outage, a seasonal dip, or a client-side delay all belong in the summary if they moved the number.
The credibility test is whether you apply the same honesty to good months. Agencies that blame the market in bad months and take full credit in good ones get found out, because clients remember the pattern even when they do not mention it.
Say it was a flat month, say whether flat is acceptable against the target, and spend the rest of the summary on what happens next. A quiet month is not a reason to pad.
Flat months are where agencies do the most damage to themselves, because the temptation is to inflate small movements into achievements. A client who reads “engagement rose 3%” presented as a win learns that your wins are not worth much.
Use the same structure you would use for bad news, including the honest context. State the result, say what actually caused it including anything outside your work, and name what would have to keep being true for the result to repeat.
A good month explained honestly reads as more credible, not less. It also banks trust for the month something goes wrong, which is the month you will need it.
It has to prove you understand the prospect’s business before it proposes anything, because the reader does not know you and has agreed to nothing.
Five beats work. Their problem in their own numbers, what that problem costs them, what you would do about it, one reason to believe you, and a next step with a date on it. One proof point, not four. Four weaken each other.
The problem, the proposed solution, the market, the money, and the ask. For a marketing plan specifically, that means the goal, the main insight behind the strategy, the two or three biggest moves, the budget headline, and how success gets measured.
These run longer than a client report summary, usually one to two pages, because the reader has no prior context at all. The one page ceiling still applies to anything shorter than a full plan.
Use industry benchmarks, label them clearly as benchmarks, and propose a short discovery phase to replace them with real numbers.
Never invent a projection to fill the gap. A marketing director who checks one figure and finds it made up will discount every other number on the page, including the accurate ones.
Usually one of five reasons. They lead with activity instead of outcome. They pile six numbers into the first three sentences. They contain no bad news at all. They use words the client does not use. Or they end without asking for anything.
That last one does the most damage over time. A summary closing with “let us know if you have questions” teaches the client these emails need no reply, and once they have learned that, they stop opening them.
Count the replies. A summary that ends with a real request should get an answer most months. If your last six reports produced no response at all, the client has stopped reading.
The other signal sits in your email delivery data. A client with a high open rate and a click rate near zero is reading your summary and never opening the report, which means the summary is now the whole deliverable as far as they are concerned.
Final Thoughts
Run the sum for your own agency. Clients, times reports per month, times twelve. That’s how many executive summaries you owe this year, and how many chances you get to be the reason a client stays.
The one reason to fix this before anything else in your reporting is simple. For a good share of your clients, the summary isn’t the introduction to the report. It is the report.
Pick one client and write next month’s summary using the four lines. Result, Reason, Risk, Request.
It takes about ten minutes, and the reply tells you whether it worked.
Turn your executive summaries into visual reports that executives actually want to read.
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