Case study writing: consent, costs and client stories

What to take away

A case study is reported business writingwho the client is, what was wrong, what you did, and what changed.
Using a client's name needs a lawful basis and a documented sign-off before publication.
Fees cover interviewing, drafting and approval rounds, not simply a word count.
Specific figures and a named spokesperson persuade; adjectives do not.

What a case study writing service covers

Most case study writing services in the UK work through four stages: scoping, interviews, a first draft, and revisions after internal review.

Four stages of a case study

Scoping the story and sources
Interviews with sponsor and delivery lead
First draft of the narrative
Revisions after internal review

The writer speaks to the client sponsor and to the person who delivered the work, then builds a narrative around the buying problem, the work done, and the result.

Expect 700 to 1,500 words for the web version, plus a short cut for email or sales decks.

This is reported writing rather than promotional writing. Every claim in the draft should be traceable to something a named person said or a figure the client supplied.

Why UK B2B buyers read client stories differently

UK business readers are wary of superlatives.

A page that records a measured fall in processing time does more work than one that calls a project transformational.

That is especially true when the reader sits in procurement or finance.

Plain British English helps. Short sentences and concrete nouns read as evidence rather than sales copy.

Customer success story copywriting for software firms follows the same shape, with usage figures standing in for delivery milestones.

Quotes from customers are endorsements, and the CAP Code requires them to be genuine and not misleading. The Advertising Standards Authority (ASA) administers the code.

Consent, accuracy and sign-off

Naming a client contact, quoting an identifiable employee or publishing identifying details can involve processing personal data.

The ICO's UK GDPR guidance explains the lawful bases, and consent is only one of them.

Legitimate interests can cover B2B marketing, but the business must record why it considers that fair.

The Data Protection Act 2018 sets the enforcement framework around those rules.

In practice: get approval by email from someone senior enough to bind the client, and agree which figures may be published.

Keep the approval email or record with the final copy. It should identify the approved version, who approved it, which names, quotes, figures and logos may be used, and the channels covered. Record the lawful basis separately; publication sign-off does not itself establish one.

If that contact leaves, the approved version still stands as the record of what was agreed.

A sequence that keeps a case study on schedule

For a single 800-word case study, most UK writers work to this order.

Agree the brief, audience, evidence needed and named approver.
Interview the client sponsor and the person who delivered the work.
Draft the story around the problem, the work done and the result, tracing each claim to a quote or supplied figure.
Send the draft for factual review and revisions, confirming which figures and quotes can be used.
Get approval for the final wording, names, quotes, figures and publication permissions before publishing.

Case study schedule in five steps

Brief the reader, decision, length, deadline
Book 45 minutes sponsor, 30 minutes delivery
Draft full document with headline and subheadings
Review facts and quotes with client
Reuse in sales PDF, email, social post

Build in a named approver at the briefing stage, because chasing sign-off late is the usual cause of delay.

What a case study copywriter costs in the UK

The ranges below are illustrative, not a quotation or a survey result.

Typical scope

Freelance B2B case study writer: One 800-word study, two interviews, two revisions
Boutique content agency: The same scope plus an editor and a sales one-pager
Full-service agency: Case study with design, photography or video
Annual retainer: Four case studies, shared interview schedule

Illustrative fee

Freelance B2B case study writer: £400 to £900
Boutique content agency: £900 to £1,800
Full-service agency: £2,500 to £6,000
Annual retainer: £3,000 to £8,000

For how writers price other formats, see UK copywriting rates per word.

Scope and the number of approval rounds move the price more than word count does.

Ask for a fixed fee per case study rather than an hourly rate, and separate the writing from design or video work.

How to choose a B2B case study writer

Ask for two published case studies with named clients, then check the dates and job titles.

Ask who runs the interviews. A writer working only from a survey will produce generic quotes.

Ask who chases the client for sign-off, because that step, not the writing, is where projects stall.

Check whether they interview in British English and whether they will write the sales one-pager too.

A written brief removes most of this risk. The steps in how to write a copywriting brief apply to client stories as much as to websites.

Common questions

How long does one case study take to write?

Two to four weeks is typical: one week for interviews, one to draft, and one or two for client approval.

Do I need written consent to name a client?

Not always written, but you need a recorded lawful basis and a clear approval trail. Email approval from a named person is the simplest evidence.

Can a writer work from an existing transcript?

Yes, and it is often cheaper, because the interview is done. Send the recording, the speaker names and any figures you want included.

Is a case study the same as a testimonial?

No. A testimonial is a short quoted endorsement; a case study is a longer reported story with a problem, a process and a result.