GuideAgencies & Advisory3 min read
How to choose an advisory or growth agency
Agencies sell capacity and expertise you do not have in house. The trick is buying the expertise without paying for capacity you do not need. This guide covers the models, the fees, the selection process and the warning signs.
By Anika Rao, Consulting & Agencies Analyst
An advisory or growth agency gives you a team and a method you would otherwise have to build. The purchase goes wrong in two predictable ways: buying more capacity than the problem needs, and buying the pitch team instead of the delivery team. This guide covers the engagement models, how fees work, how to run a selection that respects everyone's time, and the warning signs that show up before the contract.
What agencies sell
Three things, in varying mixes. Strategy: positioning, go-to-market, pricing, growth planning. Execution: campaigns, content, sales development, design, technical work. Leadership: a senior person who runs a function for you part time, sold as a fractional executive or an advisory retainer.
Know which of the three you are buying. Strategy is a project. Execution is ongoing and priced on capacity. Leadership is priced on seniority and days per week. Agencies that bundle all three into one retainer make the price hard to compare and the exit hard to plan.
Engagement models
Project: fixed scope, fixed price, end date. Best for strategy work and defined deliverables. Retainer: a monthly fee for an agreed amount of work or access, best for ongoing execution where priorities shift. Fractional executive: one to three days a week of a senior operator for a set period, best when the gap is judgment rather than hands. Performance based: fees tied to results, worth considering only when the result is measurable and mostly within the agency's control.
Most growth agencies push retainers because retainers are predictable revenue. That is not a reason to refuse one; it is a reason to define the monthly output and the notice period.
What it costs
Agency pricing depends on the seniority of the people assigned, the country, and the share of senior time in the work. A retainer that looks cheap usually has junior staff on it. Ask for the team by name and role, the hours per month per person, and the rate per role. Compare the senior hours you get, not the headline monthly fee.
Fractional executives are priced by day rate and days per week; compare against the fully loaded cost of the full-time hire you are avoiding, including the months it would take to find them.
Running a lean selection
A full RFP is expensive for everyone and rewards agencies that are good at RFPs. A lean version works better for a small or mid-sized business. Write a two-page brief: the problem, the deliverable or the monthly outputs, the success measure, the budget range, and the timeline. Send it to three to five agencies found through references, industry peers and independent listings. Hold a 45-minute call with each, where they ask questions about the brief and you ask about the team. Ask for a short written proposal from two or three. Check references from clients who have been with the agency for more than a year and from one that left.
Red flags
The pitch team is not the delivery team. Case studies without numbers or without the client's name. A guaranteed result. A retainer with no defined monthly output. A contract with twelve months' commitment and thirty days' notice for them. Reluctance to name the people who will work on your account. A proposal that repeats your brief back to you without a single question. Ownership of your ad accounts, domains or data sitting with the agency.
Measuring ROI
Define the measure in the contract: pipeline created, revenue attributed, cost per qualified lead, a delivered system, a decision. Review monthly against that measure and quarterly against the alternative of hiring in house. Ignore vanity metrics; impressions and followers are inputs, not results.
Questions to ask
- Who, by name, will work on our account, and for how many hours a month?
- Which three clients like us have you served for more than a year?
- What did the last client who left say, and why did they leave?
- What is the monthly output on this retainer, in writing?
- What is the notice period, on both sides?
- Who owns the accounts, data and assets you create?
- How will we measure this in ninety days?
The short version
Decide whether you are buying strategy, execution or leadership, and price each on its own terms. Use projects for defined deliverables, retainers for ongoing work with a written monthly output, and fractional executives when the gap is judgment. Compare senior hours rather than monthly fees, run a lean selection with a two-page brief and reference calls, keep ownership of your accounts and data, and write the ninety-day measure into the contract.