How to Write a Brief an Agency Can Actually Use

Why the brief matters more than the pitch

Most disappointing agency work can be traced back to the brief. When the brief is vague, the agency fills gaps with guesses, the client reacts to guesses, and revisions pile up. A good brief is not long. It is clear, honest and specific about the things that limit the work. Writing one forces your own team to agree on what you want, which is often the hardest part.

This guide gives you a structure you can copy for creative, marketing, PR or digital projects. It uses ordinary language and avoids jargon on purpose, because the brief should be understood by everybody who reads it, including people who join the project later.

Brief, creative brief and RFP: what is the difference

A brief is any set of instructions describing what you need. A creative brief is the specific document that guides ideas and creative development: the problem, the audience, the main message, the tone and the limits. A request for proposal (RFP) asks several suppliers to propose how they would meet a need and at what price, so it adds sections on timelines, evaluation criteria and commercial terms.

If you are choosing an agency, you may send an RFP that contains a brief. Once you have chosen, the team will usually write a tighter creative brief together. The advice below applies to all three.

Step 1: State the business problem

Begin with the problem, not the solution. Compare these two openings. We need a new website. Our enquiry form is hard to find, mobile visitors leave quickly, and sales say many enquiries are poor fits. The second gives the agency something to solve and room to propose better answers than a redesign.

Write two or three sentences covering what is happening, why it matters now, and what you have already tried. Include facts you can source from your own data, and say honestly where you are guessing.

Step 2: Define the objective and how you will judge success

Name one primary objective and, if necessary, one or two secondary ones. Make the objective observable: more qualified leads, higher repeat purchases, coverage in named publications, a successful launch event. Then say how you will measure it, using which data source, over which period.

If you cannot measure something, say so. It is better to agree that a brand awareness goal will be judged through a survey or through search interest than to pretend an exact number will appear. Keep in mind that deliverables are outputs (ten posts, a film, a report) and outcomes are results (leads, sales, attention). Brief for the outcome and then agree on the outputs.

Step 3: Describe the audience as people

Describe who you want to reach in terms an agency can picture: what they do, what they care about, what they currently believe about you and your competitors, and what would make them act. Use real customer conversations, support emails or sales notes. Avoid vague labels such as everyone aged between two numbers. If you have more than one audience, rank them.

Step 4: Give the context

Share what the agency needs to avoid repeating work or making mistakes. Include your market and main competitors, previous campaigns and their results, brand guidelines, legal or regulatory limits on claims, seasonal timing, and any internal sensitivities. A short list of examples you like and dislike, with a sentence about why, tells the agency more than a page of adjectives.

Step 5: State the main message and proof

What is the one thing you want the audience to take away? Write it as a plain sentence. Then list the evidence that supports it: product features, customer results you can verify, certifications, awards. Do not include claims you cannot substantiate. Many regulators expect advertising claims to be provable, and an agency should not be put in the position of publishing something that may mislead.

Step 6: Set the practical limits

Agencies work best with honest constraints. Cover:

• Budget: give a range or a ceiling, and say what it includes (fees, production, media, taxes).
• Timeline: the final date, plus any fixed dates such as events and approvals.
• Channels and formats: where the work will appear and in what sizes or lengths.
• Mandatories: logos, legal lines, required quotes, languages.
• Exclusions: topics, tones or visuals to avoid.

Withholding the budget does not secure a better price. It usually produces proposals that are either too cautious or unrealistic, and wastes everyone's time.

Step 7: Explain how decisions will be made

Name the person who owns the project and the people who must approve. State how feedback will be gathered (one consolidated list from one person works best), how many revision rounds are expected, and how long you need to review. Many projects slip because five reviewers each add comments at different times, or because someone senior appears at the end.

A one-page template

Use these headings and keep each answer short.

1. Project name and owner 2. The problem we are solving 3. The objective and how we will measure it 4. The audience 5. Context: market, competitors, past work, brand rules 6. The main message and proof 7. Channels, formats and mandatories 8. Budget range and what it covers 9. Timeline and key dates 10. Decision makers and feedback process

Common brief mistakes

Prescribing the solution too early, so the agency has no room to think. Listing too many objectives, so nothing is a priority. Hiding the budget. Describing the audience as everyone. Using internal jargon the agency does not know. Changing the goals halfway without telling the agency or adjusting scope. Sending the brief and disappearing, rather than inviting questions.

Invite questions and confirm understanding

After you send the brief, hold a short call and ask the agency to explain the problem back to you in its own words. If their summary differs from yours, fix the brief. Treat their questions as a good sign: they show the team is thinking. Record answers in writing and update the document so there is one current version.

Key takeaways

A good brief states the problem, the objective and its measure, the audience, the context, the message and proof, the practical limits and the decision process. It is short, honest and written for people who were not in your meeting. Spend an hour on it, and you may save weeks of revisions.

Frequently asked questions