Writing a data brief: what your broker needs to know

Why a brief matters more than you might think

Most data purchases that run over time or produce disappointing counts share a common cause: the buyer did not define the requirement clearly enough for the broker to quote accurately. This is not laziness on either side. Data briefs are unfamiliar documents for many marketing teams. They often sit between the territory of a media brief and a procurement document, and organisations that buy data infrequently have no internal template to copy from.

The cost of a vague brief is real. In our experience, incomplete briefs typically result in an initial quote based on best-guess assumptions, two or three rounds of clarification emails, a revised count, and a revised price. That sequence takes 1-2 weeks. A complete brief short-circuits it entirely: the broker runs the count against your actual specification and returns a firm price, usually within one working day.

There is a secondary cost too. When assumptions are left unstated, they rarely align. A buyer who vaguely needs "south-east England businesses" might mean the M25 corridor. The broker might quote for the South East Government Office Region, which is a far wider geography. Neither party is wrong; the brief just did not specify.

What are the eight elements of a complete data brief?

Every data brief, B2B or B2C, needs to address the following eight areas. The table below shows what each element requires and what happens when it is left blank.

Element	What to specify	If left blank
1. Audience definition	B2B: SIC 2007 code(s), employee band, job function, seniority. B2C: age range, household income band, lifestyle segment, property type.	Broker quotes for the broadest possible universe. Count is inflated; price is inflated.
2. Required fields	Named contact, job title, direct telephone, mobile, business email, postal address, LinkedIn URL. Specify which are mandatory vs optional.	Broker may quote for a postal-only file when you need telephone, or vice versa.
3. Channel mix	Email only, telephone only, postal only, or multi-channel. For email or telephone, PECR compliance needs to be stated.	No indication of which suppression washes (TPS, MPS) apply. Compliance risk rises.
4. Volume range	Minimum and maximum usable records, e.g. "5,000-10,000 decision-makers".	Broker cannot price tiered licence fees or advise whether the universe is large enough.
5. Geographic scope	UK regions, counties, city clusters, or specific Royal Mail postcode sectors (e.g. "LS1-LS29, BD1-BD20").	Default is full UK. Count may be 10x larger than the territory you can actually service.
6. Recency requirements	How recently must records have been verified? Six months, twelve months, or is the file date-stamped at point of supply sufficient?	You may receive records verified 18-24 months ago at a premium price. B2B data decays at roughly 25-30% per year, so recency matters.
7. Licence type	Single-use (one campaign, one channel) vs multi-touch (multiple contacts over a defined period, e.g. 12 months). State the intended channel and use explicitly.	Default is usually single-use. If you plan three follow-up touches, you may be in breach of licence terms.
8. Budget range	An indicative ceiling or range, e.g. "£500-£1,500 for the data purchase".	Broker defaults to premium-tier pricing. You may receive a quote 2-3x higher than comparable options.

B2B vs B2C briefs: where they differ

The eight-element structure applies to both B2B and B2C briefs, but the audience-definition field is populated very differently. Getting this right before you submit the brief saves the most time of any single step.

B2B audience definition

A B2B brief should anchor the audience to at least one UK SIC 2007 code. Vague sector descriptions ("financial services", "manufacturing") are not enough; brokers work from SIC codes to run precise counts. If you are not sure of the exact code, say "SIC 2007 code 64110 (central banking) or similar financial sector codes" and ask the broker to confirm the code set during the count run.

Beyond the SIC code, specify the employee headcount band. A "financial services business" might be a sole-trader IFA or Barclays. Headcount bands such as "10-49 employees" or "50-249 employees" define the segment precisely. Add job function (IT, Finance, Operations, HR, Procurement) and seniority (C-suite, Director, Manager, Senior Manager) and the brief is self-contained for the audience element.

A worked example: "IT Directors and above in UK financial services businesses (SIC 2007 codes 64110-64999), 50-250 employees, based in Greater London and the South East."

B2C audience definition

B2C briefs pivot around consumer profile variables: age band (e.g. 35-64), household income tier, property tenure (owner-occupier, private renter, social housing), and lifestyle interests. The more variables you specify, the smaller and more targeted the count, which is usually the point.

Critically for B2C, you must state whether you need consent-based channels (email, telephone) or postal only. The consent requirement affects which file the broker can supply and what suppression washes (TPS for telephone, MPS for mail) are applied before delivery. A brief that says "email and telephone" for a consumer audience signals that you need a fully opt-in consumer file under UK GDPR and the Privacy and Electronic Communications Regulations (PECR), not just a postal file with appended contact data.

See also: how to select a UK direct mail list for B2C postal targeting specifics.

Sample brief structure you can use today

Below is a template you can copy into an email or document. The square-bracketed items are fields to complete; the rest is suggested phrasing that most UK data brokers will understand immediately.

How to brief for test and pilot volumes

Testing is sensible, and most brokers accommodate it. The key is to structure the brief so the test does not look like a reluctant purchase. A brief that says "we want 500 records to test" with no further context tells the broker nothing about the potential scale of the relationship, and they will price accordingly, usually at a higher per-record rate than for a full order.

Instead, include both figures: the test volume (typically 500-2,000 records for a direct mail or telemarketing pilot) and the rollout universe size you would consider if results are positive. "We want to pilot with 1,000 records from an estimated universe of 15,000 qualifying businesses. If the campaign returns a conversion rate above 2%, we would consider a full roll-out within 90 days." That framing changes the conversation. The broker can price the test at a sensible rate because there is a credible follow-on order in view.

Also state explicitly whether the test licence converts to the full roll-out licence or whether you would need to re-contract. Some brokers structure a "pilot-to-full" licence upfront; others treat each as a separate transaction. Knowing this before you sign avoids a renegotiation at the worst possible moment, when the test has worked and you are trying to move quickly.

What separates a tight brief from a vague one?

The single biggest gap in most briefs is the channel specification. Buyers often write "for an outreach campaign" without stating whether that means email, telephone, postal, or all three. This matters for two reasons. First, the broker cannot confirm PECR compliance without knowing the channel. Second, the suppression washes needed differ: TPS and CTPS apply to telephone, MPS applies to direct mail, and for consumer email the broker needs to confirm that records carry the appropriate opt-in consent.

The second most common gap is geographic scope. "UK" sounds specific but is not: it covers 67 million people and around 5.5 million active businesses. A sales team covering the Midlands and North West does not need a UK file. The counts look more impressive on paper, but the waste rate will be significant. Postcode-sector level targeting adds little complexity to the brief and produces a far more usable file.

Recency is the third area where briefs routinely under-specify. B2B data decays at roughly 25-30% per year as people change jobs, companies restructure, and businesses close. A brief that simply says "recent data" leaves the broker free to supply a file that was last verified 18 months ago. If you need records verified within the last six months, say so. For B2C, recency is less about individual movement and more about whether consent records are still in date under PECR; most quality brokers will confirm this in the count note, but only if you ask.

For guidance on choosing the right broker once your brief is ready, see how to choose a B2B data provider in the UK.

Common gaps that extend procurement by 1-2 weeks

The list below reflects the clarification questions that come up most frequently in our experience of handling inbound data briefs. If you address all of them in your initial brief, you will rarely need more than one exchange before a firm quote is on the table.

• No channel stated: "What channel(s) are you using this data for?" is the first question almost every broker asks. Answer it in the brief.
• No volume guidance: "How many records do you need?" follows immediately. Give a range, even a wide one.
• Sector described in plain English, no SIC code: "Manufacturing" covers SIC codes 10110 (meat processing) through 33200 (installation of industrial machinery). Be specific.
• No seniority or job function for B2B: Without this, the count includes receptionists and MDs alike. Job function and seniority narrow the universe to the people you actually want.
• No suppression file mentioned: If you already hold a database of existing customers or recent opt-outs, the broker needs to suppress against it. Not mentioning it means you may receive duplicates you have already marketed to.
• No delivery date stated: Some count and delivery processes take 3-5 working days. If you need data by a specific date for a planned campaign, include it so the broker can flag any timeline risks upfront.