How a Fractional CMO Should Brief a Marketing Agency

Three agencies receive the same request to improve marketing. One proposes a website redesign, another paid campaigns, and the third a content program. Their proposals are difficult to compare because the business has not explained which problem needs solving, what the agency can change, or what evidence would count as progress.

A fractional CMO can translate business priorities into a brief that makes agency proposals useful. The work begins before the pitch and continues through scope agreement and delivery. This guide provides an editorial brief structure for a defined marketing assignment, with examples clearly marked as illustrations. It is distinct from selecting the executive themselves; our fractional CMO selection guide covers that decision.

Identify the problem before requesting channels

Describe what is happening and why it matters. “We need more content” names an activity. “Prospective buyers understand our core service but do not understand the new offer” describes a problem that an agency can investigate. Explain what evidence supports the diagnosis and what remains uncertain.

The CMO should discuss the issue with sales, customer-facing teams, and the person accountable for the business outcome. Collect relevant observations rather than asking each stakeholder for a preferred campaign. A request can become impossible to answer when every department adds a different objective without resolving the conflict.

The IPA's discussion of the role of a brief connects clear objectives and success criteria with the quality of agency work and the efficiency of the briefing process. Use that as a reason to make choices before commissioning activity, rather than filling a template with broad aspirations.

Separate the business outcome from the agency's assignment

A business may want more qualified opportunities, but the agency may control only research and campaign creative. State the intended commercial contribution while specifying the work the agency is actually being asked to perform. Sales response, product readiness, pricing, and delivery capacity may remain outside its control.

Identify the buyer group and the behavior the work should influence. A campaign aimed at existing customers considering an additional service needs a different brief from one aimed at unfamiliar prospects. Include the relevant market, buying situation, and barriers. Avoid claiming the audience has a particular motivation unless you have evidence.

Ask the agency to challenge the proposed diagnosis. The brief should give enough direction to focus the assignment while allowing a reasoned recommendation. A CMO who has already decided every channel and message may be purchasing production rather than asking for strategic input; either can work if the scope says so.

Build a brief that answers practical questions

Keep the main document short enough to use in a working conversation. Put supporting material in a referenced appendix or shared folder, with the appropriate access. The table below is a starting structure, not a requirement to produce a long procurement document for every small project.

Separate confirmed information from hypotheses. If the business has no reliable baseline, say so and include establishing one in the proposed scope. Do not ask agencies to build forecasts from numbers the internal team does not trust.

Make the budget usable

Tell agencies what the budget covers. Strategy, production, media, software, research, travel, and ongoing management can be priced differently. A single number is not enough if one bidder assumes media is included and another assumes it is additional.

Give a realistic range or ceiling where the business can do so, and ask for the assumptions behind the recommended allocation. If there are options, request a core scope and clearly separated additions. That makes tradeoffs visible without turning every proposal into an unlimited menu.

Identify the internal contribution as well. An agency may depend on customer interviews, product specialists, design files, or a developer to publish changes. The CMO should confirm that these resources are available. A proposal can fit the external budget and still fail because nobody reserved the internal time it needs.

Use an illustration to test whether the brief is clear

Illustration: a B2B services company is launching a new assessment offer. Sales conversations suggest that prospects understand the problem but cannot explain how the assessment differs from an ordinary consultation. The company wants the agency to develop and validate clearer offer messaging before expanding promotion.

A useful brief might request a review of existing evidence, a small research phase, a message framework, a landing-page recommendation, and a defined creative test. It would state who approves claims, which customer evidence may be used, what publication support exists, and which costs are inside the budget.

The brief should not guarantee a specific number of leads from untested messaging. Instead, it can ask the agency to explain what it expects to learn, how the proposed work supports the commercial objective, and what evidence would justify the next investment. The CMO owns the decision about whether that evidence is sufficient.

Give agencies comparable information

Share the same core brief, data definitions, deadlines, and response requirements with each shortlisted agency. Record material clarifications and make them available consistently. Otherwise, differences in proposals may reflect different information rather than different quality of thinking.

Specify what you want to evaluate in the response. Relevant examples might include problem interpretation, proposed method, assigned team, dependencies, scope, and commercial terms. Keep the requested effort proportionate to the assignment and avoid using the pitch as unpaid completion of the entire project.

The IPA's agency selection guide for public sector bodies discusses clear scope, consistent communication, and evaluation criteria. Although written for that sector, these are useful process principles for other buyers too. Public-sector procurement requirements should not be assumed to apply to every private business.

Evaluate the proposed team and working method

Ask who will lead the work after the pitch, how much senior involvement is included, and which specialists are required. A persuasive presentation by people who will not participate can leave the actual delivery model unclear. Discuss the proposed working relationship with the people expected to perform the assignment.

Use the same questions across proposals. What assumption could make this approach fail? Which dependency is most important? What would the agency change if the budget were smaller? How would it respond if the first evidence contradicted the initial diagnosis?

Compare scope before comparing headline fees. One proposal may include research and testing while another begins with production. Have the CMO write a short explanation of the differences and the implications for the business. A fee comparison is useful only when the work and responsibilities are sufficiently clear.

Agree approval stages and change handling

Name one person who consolidates internal feedback. The CMO can gather views from sales, product, and leadership, resolve contradictions, and return a usable decision. Sending the agency several incompatible sets of comments turns review into an open-ended negotiation.

Define what each stage is for. A strategy review checks the problem and approach; a creative review checks how the approved direction is expressed; a production review checks execution against the agreed requirements. Reopening the objective during final production is a scope change, even if it arrives as a small comment.

Record how additions are estimated and approved. Include the number or nature of review rounds, delivery formats, access to working files, and responsibilities at handover. These commercial details belong in the actual agreement with the agency, supported by the appropriate internal review.

Connect the brief to the working relationship

At kickoff, ask the agency and internal owners to explain the brief back in their own words. Resolve different interpretations before work accelerates. Maintain a short record of changed assumptions and decisions so the original purpose does not disappear as the project evolves.

Use the fractional CMO scorecard guide to connect reporting with decisions, while keeping this assignment's measures proportionate to its scope. Deliverable acceptance, useful learning, and commercial outcomes are related but distinct. A completed campaign asset is not by itself evidence of increased demand.

When you find a fractional executive, bring a recent agency proposal that was hard to assess. Ask how the candidate would clarify the problem, align stakeholders, and write a comparable brief. Browse fractional CMO providers for leadership suited to that work. The practical result should be an agency engagement whose purpose, responsibilities, and review process are clear to everyone involved.