Marketing Case Study Template: A Fillable Format With Client Permission Built In

Updated November 2026 · Written and maintained by the Progression Agency strategy team

A marketing case study template is a fixed set of fields that turns a client win into a story a buyer can check: who the customer was, what was wrong, what changed, what the numbers did and what the customer says about it. The template below fills in on this page, adds the client permission section most templates skip, and comes in three formats: one page, sales deck and web page. If your client will not allow numbers, one section covers what to publish instead. Progression is a New York marketing agency that writes these for clients and uses the same structure on its own work.

What is a marketing case study template?

A marketing case study template is a fixed set of fields you fill in for each customer story so that every story answers the same questions in the same order. That sameness is what lets a buyer compare one story with the next, and it is also what lets your team write the fifth story in half the time of the first. It is a case study template, not a layout or a design file.

Think of a case study marketing template as a form with a story attached. The form keeps you honest, because an empty field shows what you do not yet know. This is a marketing case study format in one sentence: customer, problem, change, numbers, quote and next step, with the permission status noted beside each.

What is a case study not?

It is not a customer testimonial, which is a single line of praise. It is not a press release, which announces news. A case study shows a before and an after, with the evidence in between.

Who is this template for?

A marketer or owner at a business with a client story to tell. If you want to see how a buyer reads these, see brand advertising case studies. For Progression’s own proof, see case studies.

The fillable marketing case study template

Copy the table, replace the prompts with your own details, and leave nothing blank. The last column says what a good answer looks like, so you can check your own work before the customer sees it. Print it, or paste it into any document.

Headline and customer snapshot

Write the headline last, from the strongest approved number. The snapshot should let a similar buyer recognize themselves in two lines. Where the customer will not be named, describe the type of business and its size.

Starting problem and what changed

State the problem as the customer would. Then list what you did in the order you did it. A buyer reading a case study wants to know whether the same steps would work for them, so keep the steps concrete.

Results, written so a buyer can check them

Every result gets three parts: the number before, the number after and the period. Without all three, a result is a claim. If a figure is an estimate, say so, and say who made it.

Marketing case study format: one page, sales deck or web page

Choose the format by where the story will run, and cut the same fields to fit. The one page case study template is the shortest and travels furthest, because a sales rep can attach it to an email. A case study layout for the web can run longer, and a deck version keeps only the numbers and the quote.

The case study format that works best is the one that matches the moment a buyer meets it. A rep with ninety seconds wants the one-page sheet; a prospect researching alone at night will read the web page.

How do you write a marketing case study, step by step?

Follow nine steps, and do the permission step before any writing. Here is how to write a marketing case study without having to redo it after the customer says no.

1. Pick a story that matches the buyers you want next.
2. Get permission in writing before anything else.
3. Pull the numbers: before, after and the period.
4. Interview the customer with the same short list of questions each time.
5. Draft by filling every field of the template.
6. Send the draft to the customer for review.
7. Record who approved each number and quote.
8. Publish in the format that fits where it will run.
9. Use it in sales the day it is approved.

What goes in a case study outline for the interview?

A simple case study outline for the call: what was the situation before, what made you act, what did we do, what changed, what would you tell a business like yours. Five questions are enough.

Getting permission: the section most templates leave out

Ask for permission in writing before you draft, and be specific about what you are asking for. A general yes to a case study does not cover a logo, a figure or a quote.

Sample wording you can adapt:

• We would like to publish a case study about our work for [company]. You may review it before it goes out.
• Please tell us if we may use your company name and logo, and where.
• Please confirm each number listed below, with its period, as correct and approved for publication.
• Please approve the quote exactly as written, with your name and title.
• Please tell us how long the story may stay published, and who to contact to ask us to remove it.

If your contract with the customer restricts what you can say about the work, ask counsel before you ask for permission. A signed permission does not override a confidentiality clause.

What if you cannot publish the numbers?

Publish what the customer approves, and say what kind of number it is. A client who will not share dollars may share a percentage, a range, or a direction of change.

• A percentage change, with the period.
• A range, such as between two figures, if the customer approves the range.
• Before and after in one direction, such as faster or fewer, with the period.
• An anonymized description of the customer, such as a regional manufacturer.
• A statement of what the customer would do again.

Never make up a figure, and never round a number in a direction that flatters you. Keep a state of approved to publish for every number, so that a number without approval does not slip into a draft.

What the FTC expects when a case study claims results

The FTC’s Endorsement Guides staff FAQ says endorsements claiming specific results are usually read to mean that others can expect the same. Statements such as results not typical or individual results may vary do not change that reading. An advertiser needs proof the results are typical, or must clearly and conspicuously disclose the performance people can generally expect.

The same FAQ says an endorsement must be the honest opinion of the endorser and cannot make a claim the marketer could not legally make. A connection the audience would not expect, such as an employee, a relative or payment, should be disclosed clearly and conspicuously. This is staff guidance. Ask counsel what applies to your case study.

What does this mean for your template?

Add a line under Results saying whether the figures are typical, and add a line under Quote saying whether the person quoted is paid or related to you. If you cannot say yes to the first, write down what customers generally achieve.

Filled example: a hypothetical marketing case study

Illustrative example. The case below is hypothetical: a regional HVAC parts distributor that does not exist, shown to make the template concrete. The figures are marked as samples so that none is read as a real result.

Notice what the example does. The headline carries a number, the problem is a cost, the actions are listed in order, and the permission row shows what is still open. When you read marketing case study examples from other companies, check each one for the same thing: a buyer should be able to find the number.

Marketing case study template variants by use

The fields stay the same, and the emphasis changes with the audience. Marketing case study templates for different kinds of work differ mainly in the unit the numbers use.

A business case study template that works across industries uses these same fields, with the numbers changed to the unit your buyer already tracks. A case study template business owners can reuse also keeps the permission row, because that row travels with every story.

Why most case studies go unread

Most case studies fail for one of four reasons, and each has a fix in the template.

How do you fix them?

Fill the Results row with all three parts, give the quote a title, write the problem first and drop any logo you cannot tell a story about.

Where a finished case study earns its keep

A finished story works as a case study for sales the day it is approved. Attach it to follow-up emails, put it on a proof page on your site, link it from proposals and add it as an appendix.

• Sales follow-up: the one-page version, attached to the email.
• Site proof page: the web version, linked from service pages.
• Email: a short excerpt with a link to the full story.
• Proposal appendix: the version closest to the buyer’s industry.

If you would rather have the stories written for you, see B2B content marketing services. To fit case studies into a wider plan, use the marketing plan template.

Progression quotes the writing and design of case studies after a written scope.

Related services and guides

Pages that sit beside this template:

• Case studies
• Brand advertising case studies
• B2B content marketing services
• Marketing plan template
• Content marketing agency

Frequently asked questions