Agency case studies: how to turn client work into stories that win similar work

Which client projects make the best case studies?

The ones that look like the work you want more of. That sounds obvious, but most agency case study pages are a portfolio of favourite projects rather than a sales tool. A prospect reads case studies looking for their own situation. If you want rebrand projects for mid-size SaaS companies, your most useful case study is a rebrand for a mid-size SaaS company, even if your most impressive project was something else.

Three filters, applied in order.

1. Does it match the work you're selling this year? Service line, client size, sector.
2. Is there one outcome the client would describe as the point of the project? A launch date hit, a pipeline number, a cost removed, a decision enabled. One outcome, clearly stated, beats five vaguely.
3. Will the client say yes? Happy, still in contact, and not in a sector where naming vendors is sensitive.

How should an agency case study be structured?

Agencies instinctively lead with process because process is what they sell. Prospects skim process. Lead with the client's situation and outcome, and let the process explain how you got there.

1. The client and the problem. Who they are, what wasn't working, and what it was costing them. Specific: "reps spent the first call of every deal explaining pricing tiers" is a problem a prospect recognises.
2. Why they chose you. What they had tried, what alternatives they considered, what tipped it. This is where your positioning gets proven by a third party.
3. The engagement. Scope, timeline, how you worked together, one thing that was hard. Keep it to a paragraph or two.
4. What changed. The outcome, with how it was measured and over what period. Attributed estimates where that's all you have.
5. What a similar company should take from it. One or two sentences that turn the story into a reason to call you.

Add a client quote (approved in writing), one headline result, and a short client description. Keep it to 600 to 900 words. The agency sample draft on our site shows the shape.

How do you handle results you can't fully prove?

This is the agency case study's defining problem. You rarely own the client's analytics, CRM, or revenue data. What you have is what the client told you, usually in a call or an email, sometimes months later.

The honest approach is attribution. "The client reports median time to proposal fell from 47 days to 31 days in the two quarters after launch" is a true sentence if the client said it. "Time to proposal fell 34 percent" presented as your result is not, unless you have the report.

• If the client has shared a report or an export, cite it and keep the figure.
• If the client has given you a number verbally or by email, attribute it to them and keep their wording.
• If the client has given you an estimate ("probably a third fewer discovery calls"), it stays an estimate, attributed, in their words.
• If you have nothing, write the qualitative change the client described and leave the number out.

Prospects who buy agency services are used to reading inflated case studies. An attributed, honestly-hedged result reads as more credible, not less. The results guide covers how to ask clients for data in a way that gets it.

How do you get client permission?

Ask at the end of the project, in writing, for four specific things: permission to name them, permission to state the results you intend to state, approval of any quote attributed to a named person, and rights to use their logo and any visuals. Ask for all four at once so you aren't going back three times.

Build it into the close-out. Many agencies add a line to the statement of work or the final invoice email: "We'd like to document this as a case study. Here's what we'd say. Can you confirm, or tell us what to change?" Goodwill is highest at project end and decays from there.

When a client won't be named, an anonymised version ("a regional logistics software company") with real, attributed results is still a useful sales tool and is often easier to get approved than you'd expect.

Where should agency case studies be used?

A case study page on your site is the baseline, and it earns search traffic for the service and sector it describes. The formats that actually win work are the derivative ones.

• A one-page brief dropped into proposals and sent after discovery calls.
• A LinkedIn document post when the client announces the result, with the client tagged.
• Social graphics for the pull quote and the headline result.
• An email snippet your new-business lead can paste into follow-ups.
• Slides for the credentials section of a pitch deck.

Producing these from the written story is most of the work, which is why the Complete Case Study Kit includes the web layout, PDFs, four social posts with graphics, the brief, and the email snippet, designed in your brand.

Can an agency outsource case study production?

Yes, and increasingly agencies do, for a simple reason: the people who could write the case study are the people billing clients. The story goes stale while it waits for a free afternoon.

Outsourcing works when the producer works from your material rather than needing calls with your client, keeps your brand on the output, and gives you a fixed scope and price. Case Study Works is built that way: you upload the project notes, the client's emails or call transcripts, and your brand kit, and you get a sourced draft within two business days, then the finished assets under your brand. White-label delivery for your own clients is available on request, so an agency can offer case studies as a service without building the capacity in-house.

Frequently asked questions