how to make an effective case study

How to Write a Case Study: Bookmarkable Guide & Template

Updated: July 18, 2024

Published: June 13, 2012

Earning the trust of prospective customers can be a major challenge. Before you can expect to earn their business, you’ll need to demonstrate your ability to deliver on the promises of your product or service. The best way to win new business is with cold, hard proof.

A great way to prove your worth is through a compelling case study. HubSpot’s 2024 State of Marketing report found that case studies are so captivating that they were the fifth most commonly used type of content that marketers relied on.

That statistic still holds true in Forbes Advisor’s 2024 study, which adds that 78% of B2B businesses report using case studies and customer stories because they are “ crucial for demonstrating real-world value. ”

Having written these ever more frequently over the past ten years, I hope to serve as your guide through a process that can feel daunting, but I promise is worth the effort. Below, I'll walk you through what a case study is, how to prepare for writing one, what to include in it, and how it can be an effective tactic.

Table of Contents

Case Study Definition

Why Write a Case Study?
How Long Should a Case Study Be?

Case Study Templates

How to write a case study, case study format, business case study examples.

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General Case Study Template

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A case study is coverage of a specific challenge a business has faced, and the solution they've chosen to solve it. Case studies can vary greatly in length and focus on several details related to the initial challenge and applied solution, and can be presented in various forms like a video, white paper, blog post, etc.

In professional settings, it‘s common for a case study to tell the story of a successful business partnership between a vendor and a client.

Perhaps the success you’re highlighting is in the number of leads your client generated, customers closed, or revenue gained. Any one of these key performance indicators (KPIs) are examples of your company's services in action.

When done correctly, these examples of your work can chronicle the positive impact your business has on existing or previous customers, helping you attract new clients.

Why write a case study?

I know, it sounds like a huge endeavor — is it really worth it?

The truth is that while case studies are a huge undertaking, they are powerful marketing tools that allow you to demonstrate the value of your product to potential customers using real-world examples.

Here are a few reasons why you should write case studies.

1. Explain complex topics or concepts.

Case studies give you the space to break down complex concepts, ideas, and strategies, showing how they can be applied in a practical way.

You can use real-world examples, like an existing client, and use their story to create a compelling narrative that demonstrates how your product solved their issue. Most importantly, it explains how those strategies can be repeated to help other customers get similar, successful results.

2. Show expertise.

Case studies are a great way to demonstrate your knowledge and expertise on a given topic or industry. This is where you get the opportunity to show off your problem-solving skills and how you’ve generated successful outcomes for clients you’ve worked with.

3. Build trust and credibility.

In addition to showing off the attributes above, case studies are an excellent way to build credibility. They’re often filled with data and thoroughly researched, which shows readers you’ve done your homework.

A robust case study instills confidence in the solutions you present because the reader has now vicariously experienced the problem — and they followed, step-by-step, what it took to solve it. These elements work together, enabling you to build trust with potential customers.

4. Create social proof.

Using existing clients that have seen success working with your brand builds social proof .

People are more likely to choose your brand if they know that others have found success working with you. Case studies do just that — put your success on display for potential customers to see.

All of these attributes play together like an orchestra to help you gain more clients. Afterward, the case study acts as a reference. You can pull quotes from customers that were featured in these studies to repurpose them in other marketing content.

How long should a case study be?

Now that you’re more acquainted with the benefits of producing a case study, let’s explore how long these documents should be.

The length of a case study will vary depending on the complexity of the project or topic discussed. However, as a general guideline, case studies typically range from 500 to 1,500 words.

Whatever length you choose, it should provide a clear understanding of the challenge, the solution you implemented, and the results achieved.

This may be easier said than done, but it‘s important to strike a balance between providing enough detail to make the case study informative and concise enough to keep the reader’s interest.

The primary goal here is to effectively communicate the key points and takeaways of the case study. It’s worth noting that this shouldn’t be a wall of text. Make it attractive to dive into by using headings, subheadings, bullet points, charts, and other graphics to break up the content and make it more scannable for readers.

I’ve also seen more and more brands incorporate video elements into case studies listed on their site for a more engaging experience, which is highly recommended given that video is currently the best performing marketing content format.

case study format, forbes table of best performing content marketing formats

The Final Approval

Once any necessary edits are completed, send a revised copy of the case study to the customer for final approval.

Once the case study goes live — on your website or elsewhere — it‘s best to contact the customer with a link to the page where the case study lives.

Don’t be afraid to ask your participants to share these links with their own networks, as it not only demonstrates your ability to deliver positive results and impressive growth, as well.

8. Download a case study email template.

You’ve gathered your resources, and soon your candidate will get to explore the exciting details of participating in your case study.

The case study release form communicates what you'll need from your chosen subject, and your success story letter outlines the process in its entirety.

Hopefully by now they’ve replied that they are interested in working with you on a customer success story. It’s time to send your case study email!

To give you an idea of what that might look like, check out this sample email.

Screenshot of example of case study email template

In terms of the interview structure, I recommend categorizing the questions in a way that the answers flow into six specific sections that will mirror a successful case study format. Combined, they'll allow you to gather enough information to put together a rich, comprehensive study.

Open with the customer's business.

The goal of this section is to generate a better understanding of the company's current challenges and goals, plus how they fit into the landscape of their industry. Sample questions might include:

How long have you been in business?
How many employees do you have?
What are some of the objectives of your department at this time?

Cite a problem or pain point.

To tell a compelling story, you need context that helps match the customer's needs with your solution. Sample questions might include:

What challenges and objectives led you to look for a solution?
What might have happened if you did not identify a solution?
Did you explore other solutions before this that did not work out? If so, what happened?

Discuss the decision process.

Exploring how the customer decided to work with you helps to guide potential customers through their own decision-making processes.

Sample questions might include:

How did you hear about our product or service?
Who was involved in the selection process?
What was most important to you when evaluating your options?

Explain how a solution was implemented.

The focus here should be placed on the customer's experience during the onboarding process. Sample questions might include:

How long did it take to get up and running?
Did that meet your expectations?
Who was involved in the process?

Explain how the solution works.

The goal of this section is to better understand how the customer is using your product or service. Sample questions might include:

Is there a particular aspect of the product or service that you rely on most?
Who is using the product or service?

End with the results.

In this section, you want to uncover impressive measurable outcomes — the more numbers, the better. Sample questions might include:

How is the product or service helping you save time and increase productivity?
In what ways does that enhance your competitive advantage?
How much have you increased metrics X, Y, and Z?

It’s a smart idea to send a copy of your interview questions to your subject ahead of time so they can prepare strong answers and collect the numerical data you need from them.

10. Lay out your case study format.

When it comes time to take all of the information you‘ve collected and actually turn it into something useful, it’s easy to feel overwhelmed. I always do, but I also know that it works out in the end, so I just jump on in and work it through.

So where should you start? What should you include? What's the best way to structure it?

It‘s important to first understand that there is no one-size-fits-all when it comes to the ways you can present a case study.

They can be very visual, which you’ll see in some of the examples we've included below, and can sometimes be communicated through video or photos with a bit of accompanying text.

Here are the sections I’d suggest, and I'll cover these in more detail after #11 below:

Title. Keep it short. Develop a succinct but interesting project name you can give the work you did with your subject.
Subtitle. Use this copy to briefly elaborate on the accomplishment. What was done? The case study itself will explain how you got there.
Executive Summary . A 2-4 sentence summary of the entire story. You'll want to follow it with 2-3 bullet points that display metrics showcasing success.
About the Subject. An introduction to the person or company you served, which can be pulled from a LinkedIn Business profile or client website.
Challenges and Objectives. A 2-3 paragraph description of the customer's challenges, before using your product or service. This section should also include the goals or objectives the customer set out to achieve.
How Product/Service Helped. A 2-3 paragraph section that describes how your product or service provided a solution to their problem.
Results. A 2-3 paragraph testimonial that proves how your product or service specifically benefited the person or company and helped achieve its goals. Include numbers to quantify your contributions.
Supporting Visuals or Quotes. Pick one or two powerful quotes that you would feature at the bottom of the sections above, as well as a visual that supports the story you are telling.
Future Plans. Everyone likes an epilogue. Comment on what's ahead for your case study subject, whether or not those plans involve you.
Call-to-Action (CTA). Not every case study needs a CTA, but putting a passive one at the end of your case study can encourage your readers to take an action on your website after learning about the work you've done.

When laying out your case study, focus on conveying the information you've gathered in the most clear and concise way possible.

Make it easy to scan and comprehend, and be sure to provide an attractive call-to-action at the bottom — that should provide readers an opportunity to learn more about your product or service.

11. Publish and promote your case study.

Once you‘ve completed your case study, it’s time to publish and promote it.

Some case study formats have pretty obvious promotional outlets — a video case study can go on YouTube, just as an infographic case study can go on Pinterest.

But there are still other ways to publish and promote your case study. Here are a couple of ideas.

Lead Gen in a Blog Post

As stated earlier, written case studies make terrific lead-generators if you convert them into a downloadable format, like a PDF.

To generate leads from your case study, consider writing a blog post that tells an abbreviated story of your client‘s success and asking readers to fill out a form with their name and email address if they’d like to read the rest in your PDF.

Then, promote this blog post on social media, through a Facebook post or a tweet.

Published as a Page on Your Website

As a growing business, you might need to display your case study out in the open to gain the trust of your target audience.

Rather than gating it behind a landing page, publish your case study to its own page on your website, and direct people to it from your homepage with a “Case Studies” or “Testimonials” button along your homepage's top navigation bar.

The traditional case study format includes the following parts: a title and subtitle, a client profile, a summary of the customer’s challenges and objectives, an account of how your solution helped, and a description of the results. You might also want to include supporting visuals and quotes, future plans, and calls-to-action.

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