How long should a case study be?
Long enough to tell the story, short enough to hold attention. For most service businesses, 600 to 900 words works well. If the result is complex, go longer. If it's simple, keep it tight.
Case Studies
A case study is a documented account of how a specific client achieved a specific result working with you. It covers the starting problem, what you did about it, and what changed as a result.
Topics: case studies social proof buyer trust results, Social Proof, buyer persona generator, AI buyer persona, customer avatar, audience research, buyer psychology, marketing persona
Definition
A case study is a documented account of how a specific client achieved a specific result working with you. It covers the starting problem, what you did about it, and what changed as a result.
Why it matters
Case studies do something testimonials can't: they show your process, not just your outcome. Buyers who are still figuring out whether their problem is solvable get to see the whole journey, which lowers their risk perception considerably.
What happens without it
Without case studies, you're asking buyers to trust a black box. They see the before and the after but have no idea what happens in between, and uncertainty about the process is one of the main reasons high-ticket buyers stall.
What good looks like
A good case study names the client (or gives enough detail to make it real), describes the specific problem they came in with, walks through the key decisions made, and ends with a quantified result. It reads like a story, not a brochure.
How to build it
- Pick a client whose result is both measurable and representative of what your average buyer can expect.
- Interview them using the structure: what was the problem, what had they tried, why did they choose you, what happened, what's different now.
- Write it in narrative form, not bullet points. Bullets strip out the texture that makes it believable.
- Include a pull-quote from the client in their own words at the top so skimmers get the punchline immediately.
- Publish it as a standalone page so it can rank in search for the specific problem it solves.
Common mistakes
- Writing it from your perspective instead of the client's, which turns it into a sales piece instead of a story.
- Leaving out the hard part. If you skip the struggle or the pivot, the story sounds fake.
- Using only aspirational clients whose results nobody can relate to.
Related terms
Questions and answers
Do I need the client's permission?
Yes, always. Get it in writing. Some clients are happy to be named, others want anonymity. An anonymous case study with specific details still converts well.
Can I write a case study without a measurable ROI?
Yes. Not every result is financial. Time saved, stress reduced, confidence gained, and relationships improved are all legitimate outcomes worth documenting.