How to Write Client Case Studies That Win New Business

A case study is the most persuasive piece of content a service business can publish on its website. Unlike a testimonial — which is a brief, positive quote — a case study walks a potential customer through exactly what you did, for whom, and with what result. It answers the question that every prospect is silently asking: "Has this business solved a problem like mine before, and can I see the evidence?" Done well, a single case study can convert more enquiries than months of social media posts or paid advertising.

Yet most small businesses either don't publish case studies at all or publish ones that are so vague and self-congratulatory that they fail to do the job. At Xpose, we write case studies for our own agency and help clients develop them for their websites. This guide explains the structure that works, how to gather the information you need, and how to present case studies on your site in a way that generates enquiries.

The Structure of an Effective Case Study

Every effective case study follows a simple three-part narrative: problem, solution, result. The problem section describes the client's situation before they came to you — what challenge they were facing, what wasn't working, and why it mattered to them. This is where potential customers recognise themselves: if their problem sounds like the one in your case study, they immediately see you as relevant. Be specific about the client's sector, size, and context — "a Norwich solicitors firm with three partners" is far more relatable than "a professional services client".

The solution section describes what you actually did — not in vague terms ("we created a bespoke solution") but in concrete ones ("we redesigned the website from a Wix template to a custom WordPress build, restructured the service pages around keyword research, and implemented a Google Business Profile strategy targeting local search terms"). The result section is the most important part and the one most often written weakly. State specific, measurable outcomes: "organic traffic increased by 140% in six months," "the site now generates 12–15 new enquiries per month compared to two or three previously," "the client recovered the project investment within four months."

How to Gather the Information You Need

The biggest barrier to writing case studies is getting the information out of clients. Most clients are happy to contribute but busy — they won't write a detailed testimonial unprompted, but they will answer five questions on a 20-minute phone or video call. Conduct a brief case study interview once the project is complete, asking: what was your main challenge before we started? What made you choose us? What did the process feel like? What specific results have you seen? Would you recommend us, and why? Record the call (with permission) and transcribe it — you now have all the raw material you need, in the client's own words.

For results, come prepared with your own data: before and after screenshots from Google Analytics or Search Console, traffic numbers, conversion rates, or whatever metrics are relevant to the project. Clients often don't track results as diligently as you do, and presenting the data yourself makes the case study more compelling and takes the burden off the client. Always share the draft with the client for approval before publishing.

Presenting Case Studies on Your Website

Case studies deserve their own dedicated section on your website, not just a page buried in a blog archive. Create a "Case Studies" or "Our Work" section in your main navigation that lists all your case studies with thumbnail images, client name or industry, and a one-line summary of the result. Individual case study pages should be long enough to be genuinely informative — typically 400 to 800 words — but structured with clear headings so visitors can skim quickly.

Include a clear call to action at the end of each case study: "Have a similar challenge? Talk to us." Link related case studies to each other to encourage further reading. Use real images where possible — screenshots of the completed website, photos of the client's premises, or before-and-after traffic graphs are all more compelling than stock photography. At Xpose, we also publish short case study summaries as LinkedIn posts, which consistently outperform generic "here's what we do" content and often directly generate new enquiries.