How to Write a Client Case Study That Sells Your Coaching

A testimonial says she's wonderful. A case study says here's exactly what was wrong, here's what we did, here's what changed.

The second one sells, because it lets a stranger recognize their own situation in someone else's story. And unlike a testimonial, you can write it yourself.

The Five-Part Structure

1. The starting point — in their words. Not "Sarah was struggling with low energy." Open with the specific, slightly unflattering reality: "Sarah was falling asleep on the sofa at 8pm and had started declining weekend plans because she knew she wouldn't have the energy."

Concrete detail is what makes a reader think that's me. Abstractions don't.

2. What they'd already tried. This is the part most people skip, and it's the most persuasive section in the whole piece.

Your reader has also tried things. Listing what didn't work — and why — proves you understand the situation rather than just having a product to sell. It also pre-answers the biggest silent objection: how is this different from the last three things I paid for?

3. What you found. The turn. What was actually going on that nobody had spotted, or what the previous attempts had missed.

You're demonstrating your thinking here, not your protocol. A reader who follows your reasoning and finds it sensible will trust the parts you didn't explain.

4. What you did — at the right altitude. Enough that it feels real, not so much that it's a manual. Phases, sequence, what you adjusted when something didn't work. The adjustment matters: perfect linear stories read as fiction. Including the week where things stalled makes the whole thing credible.

5. What changed, with numbers or specifics. "Felt so much better" is worthless. "Back to running three mornings a week by week ten, and hasn't needed an afternoon nap since April" is worth the whole article.

If you don't have hard numbers, use behavior. What can they now do that they couldn't in part one? Close the loop you opened.

Where People Go Wrong

Making it about you. The reader should be identifying with the client, not admiring the coach. Keep yourself in the background.

Only showing perfect cases. A story where everything went smoothly is less believable and less useful than one with a genuine setback. Include the wobble.

Being too long. 600 to 900 words. A case study is a story, not a report.

Waiting for a spectacular result. A steady, ordinary, believable outcome converts better than a dramatic one, because the reader can imagine it happening to them.

What If You Can't Name Them?

Common in coaching, and especially in health. It doesn't stop you.

• Ask properly. Many clients say yes if you offer to send the draft first and let them change anything. Getting written permission is worth the extra email.
• Anonymize. "A client in her forties, three years post-diagnosis" works fine. You lose a little credibility and keep all the usefulness.
• Composite, labeled as one. If you combine several clients, say so plainly: "a composite of several clients with the same pattern." Honest and still illustrative — the one thing you must never do is present an invented story as a real named person.

Where to Put It

A case study is worth far more than a blog post that sits in an archive. Use it in your follow-up email after a call — matched to the prospect's situation, it's the single most persuasive thing you can send. Put it on your sales page next to the button. Send it to referral partners so they know precisely who to send you.

Write one this month about your most typical client — not your most impressive one. Typical is what your next prospect will recognize.