What Is an Agency Brief?
An agency brief is a comprehensive document that governs the relationship between a brand and its agency partner. It covers the campaign or engagement scope, creative direction, governance structure, performance metrics, intellectual property terms, and commercial arrangements.
Unlike a one-off project brief, an agency brief often governs an ongoing relationship or a significant multi-phase engagement. It establishes how the two organizations will work together, how success will be measured, and how the partnership can be adjusted over time.
When to Use an Agency Brief
Use an agency brief when:
- Engaging a new agency partner for the first time
- Launching a significant multi-channel campaign
- Establishing an ongoing retainer relationship
- Running a formal pitch process where agencies submit proposals against a common brief
- Onboarding a new brand into an existing agency relationship
The agency brief is most valuable when there is complexity: multiple stakeholders, multiple deliverables, multiple phases, or a significant budget. Simple, short-term projects may not require the full governance treatment.
Key Sections of an Agency Brief
1. Engagement Overview
Define the type of engagement — campaign, retainer, project, or pitch. Include the scope: which brands, products, or markets are covered? What channels and activities are included? What is explicitly excluded? State the engagement start and end dates, and whether there is an option to extend.
2. Business and Marketing Objectives
Connect the agency work to the brand's broader business goals. What are the one to three business outcomes this engagement is designed to support? How will these outcomes be measured? What is the baseline from which improvement will be measured? Tying agency work to business outcomes — rather than activity metrics — creates accountability and justifies marketing investment.
3. Target Audience
Define the primary and secondary audience segments the agency should focus on. Include demographic, psychographic, and behavioral attributes. Identify the most important audience for this specific engagement, as it may differ from the brand's general target. The more specific the audience definition, the more targeted and effective the creative will be.
4. Brand voice, Guidelines, and Guardrails
Provide the agency with the current brand guidelines, tone of voice documentation, and any previous creative work that should serve as reference. Also describe what is explicitly not acceptable: specific visual styles, messaging approaches, or competitive comparisons that should be avoided. These guardrails prevent missteps and reduce revision cycles.
5. Deliverables and Creative Requirements
List every deliverable with specific format, quantity, and technical requirements. For a campaign, this might include: the number of ad creatives per platform, video durations, copy lengths, and format specifications. For a retainer, specify the expected output volume per month across channels. Be explicit about which deliverables are fixed and which may evolve during the engagement.
6. Campaign or Engagement Timeline
Present the master timeline with key milestones, review gates, and delivery dates. Identify any external dependencies — product launches, events, media buying windows — that constrain the timeline. Build in adequate review and revision time at each stage to prevent last-minute pressure.
7. Agency Team and Client Stakeholders
List the key agency personnel assigned to the account and their roles. Identify the client's internal stakeholders and their decision-making authority. Define who has final approval on creative work and who manages the day-to-day agency relationship. Ambiguity about authority is one of the top causes of agency-client friction.
8. Governance and Communication
Define the meeting cadence, format, and participants. Specify the primary communication channel (email, Slack, project management tool) and expected response times. Define the escalation path: what happens when an issue cannot be resolved at the working level? Establish how decisions will be documented and communicated.
9. Performance Metrics and KPIs
Define the metrics that will be used to evaluate the agency's performance, organized in tiers (activity, output, outcome). Set explicit targets for each metric. Specify the reporting format and frequency. Define the review process: quarterly business reviews, monthly performance reviews, or campaign post-mortems. Tie any performance incentives or penalties to these metrics.
10. Commercial Terms
State the total engagement fee or fee structure, billing frequency, payment terms, and any expenses policy. For retainers, specify what is included and what constitutes additional charges. Define the change order process for scope changes and how they are priced. Address IP ownership and portfolio rights as applicable.
11. Termination and Transition
Define the conditions under which either party can terminate the engagement, the notice period required, and the transition obligations upon termination. Who retains what files and deliverables? How are outstanding invoices handled? Having these terms agreed upfront prevents messy endings that damage both brands.
Sample Scenario
> Scenario: A national restaurant chain is engaging a digital marketing agency for a summer campaign across social media, paid search, and email. The agency brief specifies: campaign goal of driving 20,000 additional visits to restaurant locations over eight weeks; target audience of families with children aged 5 to 12 and young professionals aged 25 to 35; deliverables of 40 social posts, 6 video creatives, 3 email blasts, and paid search management; KPI of store traffic attribution (target: 15% incremental lift); total budget of $180,000 including agency fees and media spend; agency team of 4 people with a named account director; bi-weekly review meetings; and 60-day termination clause with 30-day notice.
Related Templates
- Creative Brief Template — For campaign creative development
- Social Media Brief Template — For social-specific campaigns
- Consulting Brief Template — For strategic consulting engagements
Get Started
Stop running agency relationships without a clear governing document. Download Eonebill's free agency brief template, establish clear expectations before the engagement begins, and build agency relationships that drive real business results.