Two Paths to the Same Open New-Business Seat
An agency that needs a new-business hire generally has two real paths: search externally for someone with sales-specific experience, or promote an existing account manager who already knows the agency and its clients. Both paths carry real costs, they are just different costs, paid at different points and in different forms.
Treating one path as obviously free and the other as obviously expensive is the mistake this guide is built to correct. Promotion looks free on the surface because no external salary offer is being made, but that surface reading skips two real costs underneath.
What an External Hire Costs Before They Close Anything
PayScale’s crowdsourced compensation data, a general BD-role benchmark rather than an agency-specific figure, puts total pay for a Business Development Representative at $43,000 to $89,000 a year, with an average base of $56,095. That is the visible cost of an external hire. Layered underneath it, per Wikipedia’s summary of general HR-turnover research, is direct replacement cost commonly benchmarked at 50% to 60% of annual salary, with total turnover cost, recruiting, training, ramp-period productivity loss, reaching 90% to 200%.
Put together, an external hire is a real, front-loaded financial commitment before that person has generated a single dollar of new business, a cost that exists whether or not the hire ultimately works out.
What an Internal Promotion Skips, and What It Does Not
This is reasoning, not a cited comparative study; no source directly measures promotion-to-BD success rates against external-hire success rates. A promoted account manager skips the external search cost and the ramp time spent learning how the agency works, since they already know it. What they do not skip is ramp time on the sales skill itself: cold outreach, objection handling, and closing a stranger are not typically part of an account manager’s existing job, regardless of how well they know the agency’s clients.
The tradeoff, in plain terms, is a shorter agency-knowledge ramp against an unchanged sales-skill ramp. Promotion does not make the second one disappear, it just changes who is climbing that particular curve.
The Vacancy Promotion Quietly Creates
Promoting an account manager into a new-business role does not remove a seat from the org chart, it moves one. The account manager’s old book of clients still needs someone managing it, which means the agency is now backfilling that role, with its own version of the same replacement-cost math described above, even though the initial promotion looked like it avoided a hiring cost entirely.
An agency that promotes without planning for that backfill is often surprised, months later, by a second open seat it did not originally budget time or money to fill.
Why This Is Not a Question With One Right Answer
An agency with a strong internal candidate, someone who has shown real interest in and aptitude for selling, not just tenure, and enough capacity to absorb a backfill hire, has a genuinely reasonable case for promoting. An agency without a clear internal candidate, or one where backfilling an account-management seat would strain delivery capacity, has a stronger case for the external search, despite its higher visible price tag.
Neither path is free. The honest version of this decision weighs a known, front-loaded external cost against a promotion path that defers and redistributes cost rather than eliminating it.
Building a Decision That Survives Either Choice
Whichever path an agency picks, the first-90-days structure a new hire, internal or external, walks into still matters: a real target list, a paired handoff of pipeline context, and a process-based early milestone rather than a premature closed-revenue target. The choice of where the hire comes from does not remove the need to onboard them well once they are in the seat.
Keeping new-business meetings landing during whichever ramp period gets chosen is also not a decision this guide can make for an agency, but it is a way to reduce how much either path’s ramp time costs in lost pipeline.
What this means for you
- An external BD hire runs $43,000 to $89,000 a year in total compensation, per PayScale’s general BD-role benchmark, on top of a documented 90% to 200% total replacement cost from general HR-turnover research.
- Promotion skips the external search cost and agency-knowledge ramp, but not the sales-skill ramp itself, and it typically creates a second vacancy: the promoted person’s old account-management seat.
- Neither path is free. The real comparison is a known, front-loaded external cost against a promotion path that defers and redistributes cost rather than removing it.
Sources
The external data in this guide draws on the sources below. Figures described in the text as estimates or industry triangulations are directional and are not attributed to a single dataset.