PR Agencies: Retainer Stability Versus Project Feast-or-Famine

Retainer clients pay a fixed monthly fee for ongoing counsel and media relations work, which makes revenue easy to forecast month to month. The tradeoff is concentration risk: an agency with five retainer clients making up most of its revenue is one lost client away from a real problem, and retainer contracts often include notice periods of thirty, sixty or ninety days, which sounds like a cushion until you realize that cushion is also the time it takes to replace the lost revenue with new business, not a guarantee that replacement happens in time.

Project-based work, a product launch campaign, a crisis communications engagement, pays well and often at a premium because of its urgency, but it is inherently lumpy: a great quarter driven by one large crisis engagement can be followed by a quiet quarter with nothing comparable in the pipeline. An agency built mostly on project work needs a much larger cash cushion than a retainer-heavy agency to smooth over the gaps between engagements, and new business costs, the unpaid time spent pitching prospective clients, are a real cost that needs tracking against the revenue that pitching eventually produces.

Whichever mix the agency runs, a controller should be tracking utilization by account team, since PR is a people-cost business with essentially no inventory or cost of goods sold, and staff time is the primary cost against every dollar of revenue. A controller who reconciles actual hours worked against retainer scope catches an account that has quietly grown beyond what its retainer fee supports, before the team burns out delivering more than the contract pays for. New business time should be tracked the same way, as a cost, even though it produces no invoice, so leadership can see the true cost of growth, not just the revenue growth eventually delivers.

A fractional CFO decides the bigger question sitting on top of that tracking: what is the right retainer-to-project mix for this agency's risk tolerance, how large should the cash reserve be given the agency's actual client concentration, and should notice periods on major retainer contracts be renegotiated longer as those clients become a larger share of revenue. Sales and marketing spend for a growth-focused company runs near 37% of revenue at benchmark firms, though a PR agency's own client acquisition spend, largely staff time rather than paid marketing, looks nothing like that figure and shouldn't be measured against it directly¹.

The national median salary for accountants and auditors is $83,680 a year, a real fixed cost for an agency still under a dozen staff². For a smaller agency with a handful of retainer clients and simple billing, a fractional CFO paired with outsourced bookkeeping usually covers the need well. Once the agency is tracking utilization across multiple account teams and juggling a real mix of retainer and project work simultaneously, the daily discipline of a dedicated controller becomes worth the fixed cost.

Say the agency's largest retainer client, representing a quarter of revenue, gives notice that it's moving its PR function in-house. If nobody has modeled that scenario ahead of time, the ninety-day notice period gets spent reacting rather than executing a plan, cutting costs too late or too abruptly, or pitching new business without a clear sense of how large a gap actually needs filling. A fractional CFO who has already run this exact scenario for the agency's specific client mix knows in advance how much of a cash cushion covers the gap and how aggressively new business needs to ramp to replace it, which turns a stressful quarter into a manageable one.

If the largest retainer client gave notice tomorrow, a prepared agency would already have these in place:

• A model showing what losing that client does to revenue and profit, built before the notice arrives instead of during the ninety days.
• A cash reserve sized against the agency's actual client concentration, not a generic rule of thumb.
• A plan for which costs to trim, and in what order, so cuts are not made too late or too abruptly.
• An active new business pipeline, so replacement work is already being pursued while the notice period runs.
• Longer notice periods on the biggest retainer contracts, renegotiated as those clients grow in importance to the agency.

An advertising or performance marketing agency facing a lost client also loses media spend flowing through its books, which affects working capital as much as revenue. A PR agency losing a client loses almost pure fee revenue with no offsetting change in pass-through cash, which makes the hit cleaner to model but no less real to absorb, since payroll for the account team assigned to that client doesn't disappear the moment the client does. That's exactly why staff reallocation planning, not just new business pipeline, belongs in the same conversation as the cash cushion itself.