How to Write a B2B Case Study Sales Will Use (+ Free Template)

Asking a happy customer for a case study is like asking a friend to help you move. They like you and would say yes to coffee in a heartbeat. A move means a lost Saturday and a sore back on Sunday, though, so the reply takes a while, and sometimes it never comes.

Customers do the same with case studies. They renew, expand and tell your customer success manager they love the product, then leave a request for a 20-minute call sitting in their inbox for weeks. The fix is the one every friend wishes you’d use before a move: pack the boxes yourself. Make the ask small, do the prep and the writing, and the customer only gives you 30 minutes and a review.

In this guide, you’ll learn how to write a case study: picking the right customer, the interview questions to use, what to do when numbers are off limits, getting approval, and where to use the story so sales sends it. You’ll also get a free case study template (a Google Doc) with every email and question in it.

Case study template: what goes in each section

A B2B customer case study is a short, true story about one customer: the problem they had, why they chose you, what changed, and the proof, in numbers and in their own words. Its job is to let the next buyer picture their own team in the story, so every section of the case study outline below serves that one job, in the order a reader meets it.

• Results headline. Put the outcome in the title, with the customer’s name. “How [Customer] cut onboarding from six weeks to two” tells a buyer why to read on. “[Customer] + [Your product]” doesn’t.
• At a glance. List the customer, industry, company size, the product they use, and two or three numbers. Busy readers stop here, so this box has to make sense on its own.
• The customer. Describe who they are in one or two sentences, in the words your next buyer would use about their own company.
• The problem and what it cost. Show how they did the job before and what that cost them in hours, money or missed targets.
• Why they chose you. Say what else they looked at, including doing nothing, and what almost stopped them.
• The rollout. Cover how long it took and what was harder than expected. Buyers trust the messy middle more than a story where everything went to plan.
• The results. Give the before and after, with the number and a line saying where it came from.
• The quote. Pick one line from the customer that a sales rep could read out on a call.
• Next step. End with one call to action for a reader in the same spot.

Gong’s customer story for GHX shows the top half of this template doing its job. The headline is the result, “How GHX reduced rep ramp time by 85% with Gong,” and a Challenge and Outcome box sits right under it. Off to the side, a box lists the company’s headquarters, founding year, headcount and industry. A sales leader at a 1,000-person healthcare company can tell within seconds that the story is about a team like theirs, and each section below the box carries a result of its own, like cutting rep talk time by 25%.

Make a copy of the free B2B case study template (a Google Doc) to fill in as you go. Besides the page sections, it holds the ask email, the full interview script, the fallbacks for missing numbers, an approval email with a release line, and a LinkedIn post for your champion. This case study format works as a web page, a one-page PDF for sales or a single slide. Keep the order, and trim the story sections for the shorter formats.

Pick a customer your next buyer will recognize

Your biggest logo isn’t always your best story. A Fortune 500 name looks good on the homepage, but a 40-person SaaS company won’t see itself in a rollout run by a procurement team and a dedicated IT group. Pick the customer who looks like the buyers your sales team wants more of, and check them against four things.

• Same buyer. They share the industry, size and use case your sales team is chasing this quarter.
• A recent win. Their results come from the last six to twelve months. Older wins are harder for the customer to remember and harder to get signed off.
• A champion. One person pushed for you internally and gains from being seen as the one who got it right.
• A number you can check. The result shows up somewhere you can see it, like your product data, the last quarterly business review deck or the customer’s own reports.

To build a shortlist, ask sales and customer success for three names each, then run all six through the checklist. One or two names usually pass all four, and those are the customers to ask first.

How to ask a customer for a case study

Timing does half the work. Ask soon after a big win, while the result is fresh and the champion is still proud of it: the week a rollout goes live, a renewal or an expansion, a quarterly review with good numbers, or a support thread that ends with a thank-you. A stretch where things are simply going well is a good moment too, because the customer is already telling their own team the switch was the right call. So is the end of a project, while the details are fresh and before the people who ran it move on to the next thing.

Waiting tends to cost you. Six months on, the numbers get fuzzy, the champion may have changed jobs, and nobody remembers what the old way felt like. The earliest opening comes before any of that, at contract stage. If sales mentions during the deal that you’d love to tell the story once results come in, the ask months later feels like a follow-up instead of a favor.

Let the person who owns the relationship do the asking. A customer success manager or account manager has earned the customer’s trust, and a stranger from marketing hasn’t. Marketing writes the email, and the CSM sends it.

Then make the ask about the champion. A case study puts their name and photo in front of their peers, gives them a win to show their boss, and comes with a LinkedIn post you write for them to share. Plenty of marketers will also happily take a link from your site to their company.

Tell them how long the move takes, too. A friend says yes faster to “two hours on Saturday morning” than to “Can you help me move?” Customers tend to respond the same way: “30 minutes on a call and 15 minutes to review a draft we write” is easier to say yes to than “Would you be open to a case study?” A short ask email covers the win, the time it takes, what they get and two time slots:

Congrats on [the win]. That’s the kind of result other [job titles] ask us about all the time. Would you be open to telling that story in a short case study? It takes a 30-minute call and about 15 minutes to review a draft we write. You’d be named as the person who made it happen, and we’ll write a LinkedIn post you can share. Would [day, time] or [day, time] work?

When a customer says no, offer something smaller before you let it go. A quote for your website, an anonymous version of the story or a joint webinar can each get a yes where a full case study didn’t, and a no this quarter can turn into a yes after their next big win.

Case study interview questions (and how to run the call)

A good interview gives you most of the case study before you write a word, because the customer hands you the problem, the turning point and the quote. These habits make that more likely.

• Record it. Ask permission first, then get a transcript, so you can listen instead of typing.
• Bring two people. One person asks the questions, and the other writes down numbers and lines to quote.
• Ask for the number twice. Ask once early and once near the end, in different words. The second answer is often the better one, because by then the customer has warmed up and remembered the details.
• Send the questions ahead. Include the numbers you’ll ask about, so the customer can look them up before the call.
• Take a voice note if a call won’t happen. A recording of a call your CSM already had, or voice-note answers to five of the questions below, still gives you the customer’s own words. I often write from recordings, voice notes and transcripts someone else collected, including the SimpleTexting customer story further down this page, and the customer’s voice survives the trip as long as you have their exact words.

Work through these case study questions in the order the story happens. The full script, with space for notes, is in the template.

Before

• What were you responsible for when you started looking?
• How did you handle [the job] before?
• What was that costing you in time, money or missed targets?
• Was there a moment that made you look for something new?

The decision

• What else did you consider, including doing nothing?
• Who else was involved in the decision?
• What almost stopped you from choosing us?
• Why did you pick us in the end?

The rollout

• How long did it take to get going?
• What was harder than you expected?
• Who uses it now, and how often?

Results

• What’s different now?
• Can you put a number on it?
• Where would we find that number?
• What can you do now that you couldn’t before?
• What did your leadership notice?

The quote

• If a peer asked you about us, what would you tell them?
• Who wouldn’t it suit?
• Is there anything I should have asked?

Before you hang up, confirm their name and title as they want them printed, whether you can use their photo and logo, and who signs off on their side. A case study lives or dies on the interview, and the interview is where a case study’s cost goes when you hire a writer, so give it the full 30 minutes.

When the customer won’t share numbers

A missing number doesn’t kill the story. StoryVoice, a company that sells case study software, read customer stories from 335 B2B software companies in its Customer Proof Index and found that 10.7% never state a single figure in any story it sampled.

Start before the interview. Ask the CSM which numbers came up in the customer’s last quarterly business review, and check your own product data for usage or volume figures. Walking in with a number for the customer to confirm is usually easier for them than producing one from memory. If the number still won’t clear, work down this list, strongest first.

• Percent change instead of totals. “Cut churn by a third” tells the story without revealing the churn rate.
• Time saved per person. Hours a week per rep, analyst or manager are easy for a customer to estimate and easy for a buyer to picture.
• Before and after process. “Twelve steps to three” needs no dashboard.
• Ranges. “Between 20 and 30 new demos a month” often clears legal when an exact figure won’t.
• Your product data, with their OK. Usage or volume numbers you can see yourself, published only with the customer’s sign-off.
• A specific quote with no metric. An outcome in their words, like “We closed the books two days early,” carries more weight than a vague “It saved us time.”
• Anonymous, with full detail. When the name is the blocker, keep the industry, company size and numbers. This one comes last, because a buyer can’t check a story with no name on it.

Whatever you use, show where it came from. My case study on a $36K ARR deal from one roundup listing has a “How we know” row under the result, pointing to the agency founder’s email that named the article as the source. That one row turns a claim into something a reader can trust.

How to write a case study your sales team will send

With the transcript in hand, the writing goes fast if you follow a few rules.

• Lead with the result. The headline and the at-a-glance box come first, and the story follows.
• Make the customer the hero. Your product is the tool they picked up, not the main character.
• Use their words. A quote from the transcript beats your paraphrase. Trim it, but don’t rewrite it into marketing copy.
• Keep the messy middle. What almost went wrong is the part a buyer believes, because it matches what they expect from their own rollout.
• Source every number. Add a short line saying where each figure came from and when.
• Write two lengths. A one-page version goes to sales, and an 800- to 1,500-word page goes on your website.

I wrote SimpleTexting’s customer story about Makers Collective, the nonprofit behind a two-day craft festival called the Indie Craft Parade. SimpleTexting ran the interview and sent me the transcript, so every detail that carries the story came from the customer. The festival had run for 13 years without collecting attendee contact details, because the venue sold the tickets. Lib Ramos, the creative director, summed up the old way in one line: “From the first festival in 2010, we’ve been doing billboard ads, radio ads, and posters.” The headline puts the result up front, a contact list grown from 0 to 472, so a reader knows the payoff before the first paragraph.

My other case studies are about my own writing work, not a product, but three habits from them carry over to any B2B story.

Open with a snapshot. My Taboola case study starts with a table (the client, the page, the job, the numbers before, the numbers at the peak, and the source) before the story begins. A reader who stops there still knows the page went from about 47 US visits a month to #1 on Google for “native advertising platforms.”

Report the miss with the win. My Softr roundup case study says in its second paragraph that the page fell from about $139K a month in traffic value at its peak to a handful of visits by October, then explains what probably caused it. Telling the reader what went wrong is why the win reads as true.

Let the customer open the story. The $36K case study starts with the agency founder’s own thank-you line and the date they sent it. One real sentence from the customer does more than a paragraph of setup from you.

How to get approval without losing the story

Back to the move. Your friend should check the boxes, not repack them. Send the customer a finished draft, not a list of questions about a draft you haven’t written yet. Then make the review easy to finish.

1. Agree in your first email who signs off on their side, so legal or PR doesn’t appear in week three.
2. Send the draft with the three to five lines that need approval highlighted: numbers, quotes, the logo and anything about their own customers.
3. Give a review date about a week out, and say you’ll nudge them if you don’t hear back, not publish without them.
4. When legal cuts a number, offer a fallback from the no-numbers list instead of deleting the line.
5. Get the yes in writing, with the logo and photo covered.

Customer legal teams usually cut revenue and pipeline figures, the names of their own customers, and anything that reads like an endorsement of your pricing. Expect those edits, and keep a fallback ready for each. The template has a one-line release your champion can confirm by replying to your email, which is often all a smaller company needs.

Where to use a case study after it’s live

A case study nobody sends is a moving box that never got unpacked. Put the finished story where buyers make decisions.

• Sales. Send it to prospects who look like the customer, at the stage they’re in. The one-page version fits late-stage deals, and it gives a buyer a preview before a reference call.
• Your website. Link it from the pricing page, from industry and use-case pages, and from your comparison and alternatives pages, where a buyer weighing two tools wants proof from a company like theirs.
• Search. Publish it as a public web page, not only a PDF, with the customer, industry and use case in the title. Then it can rank for searches like “[product] for [industry].”
• AI answers. A public page with a named customer, numbers and dates gives ChatGPT and Google’s AI answers something specific to cite when a buyer asks which tool suits companies like theirs. It’s one of the inputs behind showing up in ChatGPT for buying questions.
• The champion’s LinkedIn. Send them the post you wrote the same week the story goes live, while they’re still excited about it.

Check your library once a year. Refresh a story when the customer has new numbers, and retire it if the customer has left or the story is more than about two years old.

Can AI write your case studies?

AI drafts well from a good transcript. Give it the recording’s text and the template, and you’ll usually get a usable first draft, plus the one-page version and the LinkedIn post, in minutes.

What it can’t do is the work around the draft. It can’t get the customer to say yes, ask the follow-up question when a number sounds soft, or get the customer’s legal team to sign off. Left alone, it will also smooth a customer’s words into something that sounds like every other case study. So split the work: you run the interview, AI writes the first draft from the transcript, and you check every number and quote against the recording before anyone outside your team sees it.

FAQs

How long should a case study be?

Write two versions: a one-page summary for your sales team and a web page of about 800 to 1,500 words. The web page has room for the rollout and the quote, and the one-pager gives a busy buyer the result in under a minute.

What’s the format of a case study?

A B2B case study structure usually runs in this order: a results headline, an at-a-glance box, the customer, the problem, why they chose you, the rollout, the results, a quote and a next step. You can use the same order for a web page, a PDF or a slide.

How many case studies does a B2B SaaS company need?

Aim for one per main buyer type and use case your sales team sells into before you write a second for any of them. A sales rep with a story for every kind of buyer they meet tends to use the library far more than a rep with five stories about the same kind of customer.

Do case studies need numbers?

They’re stronger with them, because a number is what a buyer repeats to their boss. When a customer won’t share one, use a percent change, time saved, a before-and-after process or a specific quote instead of dropping the story.

What’s the difference between a case study and a testimonial?

A testimonial is a line of praise, while a case study shows the problem, the decision, the rollout and the result, so a buyer can judge whether the same thing would happen for them.

How much does a case study cost?

It depends on the length, whether the writer runs the interview, and how many you order. What a B2B case study costs in 2026 breaks the rates down by format.

So, where do you start?

Pick the right friend, tell them the move takes 30 minutes, and pack the boxes yourself. This week, make a copy of the template, ask sales and customer success for three names each, and send the first ask email through whoever owns the strongest relationship.

If you have customer stories but your comparison and alternatives pages aren’t using them to win demos, we should talk.