Knowing how to write a case study is one of the most useful skills a consultant can have, and one of the most neglected. Almost every expert we work with has great stories. A hospital that stopped losing nurses after a workplace safety program. A school district that passed its state audit. A leadership team that finally stopped fighting in meetings.
Ask where those stories live, and the answer is usually “in my head” or “in a slide deck from 2019.”
Meanwhile, a buyer is on your website right now trying to decide if you have done this before. A general counsel vetting an expert. An HR director comparing three consultants. They do not want your process diagram. They want to see someone like them, with a problem like theirs, who got a good result with your help.
This guide shows how to write a case study that does that job, including what to do when your clients cannot be named, which is often the case in security, HR and legal work.
- When you learn how to write a case study, think short story: a client, a problem and a change, not a list of services.
- Confidentiality is solvable: describe the client by type, size and situation instead of by name.
- A twenty minute client interview gives you better material than anything you can write alone.
- Format for scanning: a summary box, short sections, one pull quote and a clear next step.
- Place case studies on service pages, not just on a separate portfolio page.
Why case studies sell consulting work
Consulting is hard to buy. The buyer cannot try it first. They are trusting you with a problem that may involve their reputation, their budget or their people. So they look for evidence.
Testimonials help, but a one line “Great to work with!” proves very little. A case study shows the thinking behind the result. It lets the buyer picture the project from start to finish, including the messy middle. That is why knowing how to write a case study pays off.
Case studies also do quiet work for you elsewhere. They give your sales calls a reference point (“we did something similar for a regional healthcare group, here is the write up”). They give partners something to forward. And they give search engines real, specific content about the problems you solve.
The rest of this article is the process we use when clients ask us how to write a case study for their own website.
Step 1. Pick the right project
Not every project makes a good story. Before you think about how to write a case study, decide which one to write.
Look for projects with:
- A clear before and after. Something was wrong or risky, and now it is better.
- A buyer you want more of. If you want more school district work, write about school districts.
- A decision you made. The best stories show your judgment, not just your hours.
- A client who will talk to you. Even if they stay anonymous, you need their input.
Skip projects that were mostly routine, ones where the result is hard to describe, and ones you would not want to repeat. A case study is an invitation for more of the same.
If you have several candidates, start with the one closest to your main service. That is the best place to practice how to write a case study, and it will do the most work on your site.
Step 2. Solve the confidentiality question early
This is where most consultants give up. “My clients would never let me name them.” In security, legal and HR work, that is often true. It does not mean you cannot publish.
Part of learning how to write a case study in a private field is learning to describe a client without identifying them. You have more options than you might think:
| Level of disclosure | What it looks like | When to use it |
|---|---|---|
| Fully named | Client name, logo, quote with name and title | Client is proud of the result and approves in writing |
| Named by type | “A 400 bed regional hospital in the Northeast” | Client is happy for the story to be told but not their name |
| Composite | Lessons from several similar projects, clearly described as such | Strict confidentiality, or sensitive situations |
| Anonymous quote | “Director of Operations, private university” | Client will speak but not be identified |
A few confidentiality rules we follow when deciding how to write a case study:
- Always ask. Never assume a client is fine with being named, even if they were happy with the work.
- Get approval in writing, ideally after they have read the final draft.
- Remove details that could identify them by accident: exact dates, unusual locations, specific incidents in the news.
- If you write a composite, say so plainly. Never present a blended story as one real client.
- Check any NDA or contract terms before you start writing, not after.
For expert witnesses this matters even more. Never publish details from a case that could affect the parties or the outcome. Talk in terms of the type of matter and the kind of analysis you provided. Our guide to expert witness websites covers this in more depth.
Step 3. Interview your client
The biggest shortcut in how to write a case study is this: do not write it alone. A twenty minute call with your client gives you their words, their priorities and details you have forgotten.
Ask permission to record (or take good notes) and send the questions ahead of time. Here are the interview questions we rely on whenever we work out how to write a case study:
Questions about the situation before
- What was going on that made you look for outside help?
- What would have happened if you had done nothing?
- What had you already tried?
- Who else did you consider, and why did you choose us?
Questions about the work
- What do you remember most about how we worked together?
- Was there a moment when you felt the project turn a corner?
- What surprised you?
Questions about the result
- What is different now compared with before?
- How has it affected your team, your leadership or your board?
- What would you tell a peer who is considering similar help?
That last question often gives you your best quote. People speak more naturally when they imagine advising a colleague than when they are asked for a testimonial.
Quick tip: Listen for the exact words your client uses to describe the problem. Those words belong in your headline, and they are often the same words other buyers type into Google.
Step 4. How to write a case study buyers can follow
Once you have your notes, the question of how to write a case study becomes a question of order. We use a simple five part structure:
- The client. Who they are (by name or by type) in one or two sentences.
- The challenge. What was wrong, and what was at stake if it stayed that way.
- The approach. What you did, and more importantly why you did it that way.
- The result. What changed. Be specific, but only claim what you can stand behind.
- The client’s view. A quote, named or anonymous, in their own words.
The approach section is where most consultants go wrong. They list every task: kickoff meeting, document review, site visit, report. Nobody cares about tasks. Write about the two or three decisions that made the difference.
The result section is the other trap. If you have numbers your client approved, use them. If you do not, describe the change in plain terms: “The board approved the new policy at its next meeting” or “Staff now know exactly who to call after hours.” Never invent figures to make a story sound bigger. A careful buyer can tell.
Step 5. Write it like a story, not a report
You know how to write a report. How to write a case study is a different skill. Reports are written for the person who already hired you. A case study is written for someone who has not.
Some practical writing advice for anyone figuring out how to write a case study for the web:
- Lead with the problem. The buyer is looking for their own situation. Show it to them in the first paragraph.
- Use the client’s language. If they said “we were drowning in complaints,” do not rewrite it as “heightened grievance volume.”
- Keep it short. Five hundred to nine hundred words is usually plenty.
- Cut jargon. The person reading may be a board member or a procurement officer, not a specialist.
- Show yourself thinking. “We noticed the incident reports all came from one shift” is more convincing than “we performed a comprehensive analysis.”
A good case study makes the reader think, “That is exactly where we are right now.”
For more on writing pages that sound like you and speak to buyers, our website copywriting tips article is a good companion to this one.
Have great projects but no case studies?We can interview your clients, write the stories and build them into your site so buyers actually see them.
Step 6. Format it for the web
Even the best story fails if it looks like a wall of text. People skim online, and Nielsen Norman Group’s research on how users read on the web has shown that for years. Formatting is a big part of how to write a case study that gets read.
What we include on a case study page:
- A results headline. Not “Case Study: Hospital Project” but “How a regional hospital cut overnight security incidents and rebuilt staff confidence.”
- A summary box at the top. Client type, challenge, service and result in four short lines, for people who will read nothing else.
- Short sections with clear subheadings that match your five part structure.
- One pull quote from the client, visually set apart.
- A relevant image. A photo of the site, the team (with permission) or a simple diagram of your approach. Avoid generic stock handshakes.
- A next step at the end. “Facing something similar? Let’s talk” with a link to your contact page or booking link.
Part of how to write a case study for the web is checking that the page loads fast and reads well on a phone. Many buyers will first see your case study on mobile, forwarded by a colleague. Use real headings in the HTML (not just bold text), and write proper alt text for images. The W3C writing for accessibility tips are a quick, practical read.
Step 7. Put case studies where buyers will see them
Here is a mistake we fix on almost every consultant site we redesign. All the case studies sit on one “Our Work” or “Results” page that nobody visits. Learning how to write a case study is only half the job. The other half is putting it in front of the right person.
Better places for case studies:
- On each service page. A short summary of one or two relevant case studies, linking to the full story.
- On your homepage. One strong example near the top, close to your main call to action.
- In proposals and follow up emails. Link the case study most similar to the prospect’s situation.
- On LinkedIn. Turn each case study into two or three posts: the problem, the key decision, the result.
- On a dedicated case study page, filterable by industry or service if you have more than five or six.
Sites we have built like riskmitigationtechnologiesllc.com and hrexpertconsultants.com are good examples of consulting firms where proof sits close to the service it supports. If you are planning a new site, read our consultant website design guide, or browse our work to see how we lay out proof.
How to write a case study: a template you can copy
Here is a fill in the blanks template. It is the fastest way to practice how to write a case study. Use it as a first draft, then rewrite in your own voice.
Headline: How [client type] [achieved result] by [your key approach]
Summary box:
- Client: [name, or type, size and region]
- Challenge: [one sentence]
- Service: [which of your services]
- Result: [one sentence, specific and approved]
The client: [Two sentences about who they are and what they do.]
The challenge: [What was going wrong. What was at stake. What they had already tried. Use their words.]
Our approach: [The two or three key decisions you made and why. What you did differently from what they expected.]
The result: [What changed. Numbers only if approved. Otherwise describe the change in concrete terms.]
In their words: “[Client quote]” [Name and title, or anonymous description]
Next step: Facing something similar? [Link to contact or booking page]
An example case study (invented, for illustration)
To show how to write a case study with the template, here is a short made up example for a fictional HR consultant. It is not a real client.
How a growing logistics company replaced a broken complaints process in one quarter
Example only. A family owned logistics company with about 200 employees had grown quickly and never built a real HR function. Complaints went to whichever manager happened to be nearby. Some were handled well. Some were never written down. After a difficult resignation, the owners realized they could not say how many issues had been raised in the past year, or what had happened to them.
Instead of starting with a thick policy manual, we started with one question: where do complaints actually go today? We interviewed shift leads and found three different informal routes. We designed one simple reporting path, trained managers in two short sessions, and set up a basic log the owners could review monthly.
Within the quarter, every complaint was logged and assigned. The owners now review a one page summary at each monthly meeting. “For the first time I feel like I know what is happening on the floor,” said the operations director.
Notice what it shows about how to write a case study: a recognizable situation, a decision (start with reality, not a manual), and a concrete change without invented numbers.
Common mistakes when learning how to write a case study
- Writing about yourself first. The client and their problem should come before your process.
- Listing tasks instead of decisions. Buyers want to see judgment.
- Making up or stretching numbers. One questionable figure can undo the trust the whole page built.
- Waiting until you have ten. Publish one good case study now. Add more over time.
- Hiding them on one page. Spread them across service pages where buyers need them.
- Forgetting the next step. Every case study should end with a clear invitation to talk.
Knowing how to write a case study also helps your search visibility. Each one is a page of specific, useful content about a problem you solve. Our SEO services and the SEO for consultants guide explain how to make them easier to find.
Frequently asked questions
How long should a consulting case study be?
Usually five hundred to nine hundred words, plus a summary box at the top. That is enough to show the problem, your approach and the result without losing a busy reader. If a project is complex, link to a longer write up or offer to walk through it on a call.
How to write a case study when the client wants to stay anonymous?
Describe the client by type, size and region instead of by name, remove any identifying details, and get written approval of the final draft. If the situation is very sensitive, write a clearly labelled composite based on several similar projects.
How many case studies does a consultant need?
One good one is better than none. Aim for at least one per main service, then add more as projects finish. Three to six strong case studies is plenty for most solo consultants and small firms.
Should I learn how to write a case study myself or hire someone?
You can absolutely learn how to write a case study yourself with the template above. Many consultants find the interview and the editing hard to fit in, though, so we often write them as part of a website project. Either way, your client’s voice and your real decisions should be at the center.
Where should case studies go on my website?
Knowing how to write a case study matters less if nobody finds it. Put them on the service pages they support, with a strong example on your homepage and a full collection on a dedicated page. Also link them in proposals and share them on LinkedIn.
Let’s turn your best work into proof
You already have the stories. Learning how to write a case study is mostly about getting them out of your head, protecting your clients’ privacy, and putting them where buyers will see them.
At Design Fly 24, a New York web design agency working with consultants across the US, we write and design case studies as part of our website design services and brand identity design projects. If you would like help with how to write a case study for your own projects, contact us and we will start with a short call about the projects you are proudest of.
