For most of the advertising industry's history, the agency of record agreement was the standard framework for client relationships. Both sides had contractual obligations, defined responsibilities, and a clear structure for how the work would be managed and compensated. That model gave agencies predictable revenue and gave clients a committed partner.
Most clients today are not looking for that kind of commitment, and pushing for it in a first conversation can end a promising relationship before it starts. Clients now have access to freelance networks, offshore production resources, self-serve media buying platforms, and AI-assisted content tools that give them more capability and more flexibility than they had even five years ago. The agency of record model asks them to give up that flexibility. Many will say no.
The alternative is what Second Wind calls the agency of collaboration: a flexible engagement structure that gives clients the access and accountability they want without requiring the formal commitment of a traditional AOR agreement. It is also, frankly, a better fit for how most independent agencies actually work with clients today. Here are five ways to structure that relationship, along with practical language for presenting each one.
1. Monthly Collaboration Retainer
This is the highest level of engagement, and the one that gives an agency the most predictable revenue and the client the most consistent access to the team's best thinking. Rather than billing separately for each project, the client allocates a set number of hours each month, giving them priority access to the agency's strategy, creative, and account service capacity. Every hour gets tracked against specific projects and estimates, and the client receives a single monthly invoice. If the agency exceeds the allocated hours, the client is notified before any additional billing happens. If hours go unused in a given month, they roll forward as a credit rather than disappearing.
This structure includes ongoing strategic work: ongoing monitoring of marketing trends, competitor activity, and audience insight relevant to the client's business, not just the project work itself.
A simple way to frame it to a client: "Instead of separate invoices for every project, you allocate a set number of hours each month and get priority access to our full team. Every hour is tracked and accounted for. If we don't use it all, you get the difference credited forward."
2. Partial Retainer
This structure positions the agency primarily as a project-based partner with progress billing each month for work completed or milestones reached, combined with a modest strategic retainer that covers ongoing tracking of industry trends, competitor movements, and audience insight. The retainer piece is smaller than the full collaboration model, but it still keeps the agency's strategic thinking active between projects rather than starting from zero on every new assignment.
Framing for a client: "We'll bill progressively for project work, plus a smaller monthly retainer that keeps us tracking your competitive landscape and audience data in the background, so every new project starts from current information instead of an old assumption."
3. Project Work
This is the most flexible structure and the one with the least built-in continuity, which is why it works best as a starting point rather than a long-term default. The agency provides an estimate, completes the project, and bills progressively as the work advances.
One important provision applies across all three billing structures, not just project work: if a client receives a competing bid that comes in lower, the agency should ask for the opportunity to review it and respond before the client moves forward elsewhere. This protects the client's right to seek competitive pricing while giving the agency a chance to maintain continuity on the brand's creative direction and strategic thinking. Any significant scope changes should be flagged and agreed upon before work proceeds, not absorbed silently into the existing estimate.
Framing for a client: "We'll provide an estimate, complete the work, and bill as we go. If you ever get a lower bid elsewhere, give us the chance to respond before you decide. That protects your ability to shop around and our ability to keep your brand moving in one direction."
4. Strategic Partnership
This is less a billing structure than a description of what the relationship becomes once trust and consistency are established. A genuine agency of collaboration partnership means the agency can count on a steady relationship, and the client can count on the agency bringing its full capability to the account. That consistency tends to produce stronger work over time, because the agency understands the client's business, audience, and brand deeply enough to make each project sharper than the last.
It is worth being explicit with clients about ownership here, since it is often a source of unspoken anxiety. Under standard work-for-hire principles, everything the agency creates within this kind of partnership belongs to the client. The agency should never stand in the way of that.
Framing for a client: "As we work together consistently, you should expect the work to get better, not just faster, because we'll understand your business at a level project-by-project agencies never reach. And to be clear: everything we create for you is yours."
5. Termination
Every level of engagement should include a clear, mutual exit provision. If the relationship is not the right fit for either side, both parties agree to 90 days notice before ending the engagement. This protects the client's ability to transition smoothly to a new partner and gives the agency time to complete or responsibly hand off any active work.
Framing for a client: "If this isn't working for either of us down the road, we agree to give each other 90 days notice. That's enough time to wrap things up properly, for both of us."
Using This Framework
Present these options as a starting point for a conversation, not a contract to sign on the spot. Most clients will have real questions about what the collaboration retainer actually includes and where its boundaries sit. Be specific about scope from the outset. The clearer an agency is about what is and is not covered, the fewer billing disputes come up later.
This framework works best when it is introduced early, before scope creep and informal requests have already set client expectations that undermine it. Bring it into the conversation as a sign of professionalism rather than a bureaucratic requirement, and most clients will receive it exactly that way.
