The Real Cost of Your First SDR (And the Number Nobody Puts in the Spreadsheet)
Every founder who has hired their first Sales Development Representative has a story about the number that surprised them. Not the salary number — that one was in the job description. The other number. The real one.
The salary is what goes into the spreadsheet. What does not go into the spreadsheet is everything else: the employer taxes, the benefits package, the tools you had to buy, the time you spent interviewing twelve candidates to find this one, the weeks of onboarding before they sent a single email, and the four months of below-quota performance while they found their footing in your market.
By the time an SDR is actually productive — genuinely booking meetings that match your ICP and converting at the rate you planned for — most companies have spent the better part of a year and somewhere between £100,000 and £150,000. That is the real cost. Not the salary line.
The Costs That Don't Get Counted
There are three categories of SDR cost that almost never make it into the business case.
The first is management time. An SDR in their first six months needs significant hands-on support: call coaching, sequence review, ICP feedback, pipeline guidance. Depending on who does that work, you are looking at five to eight hours per week of a senior person's time. Over a year, that is the equivalent of six to ten weeks of a head of sales or founder's full attention. That time has a cost. Most companies never account for it.
The second is ramp failure. The industry average for SDR ramp time is three to five months. What that statistic does not capture is that roughly a third of SDR hires never fully ramp at all — they hit a plateau, miss quota, and either leave or get managed out within twelve to eighteen months. When that happens, you start the clock again: re-hiring, re-ramping, re-paying the ramp cost. Some companies have run this cycle three times before their outbound engine is actually working.
The third is targeting quality. SDRs, particularly early in their tenure, tend to contact the companies that are easiest to find rather than the companies that are most likely to convert. They use the same tools in the same way and end up with overlapping, low-quality contact lists. The result is high volume, low relevance outreach — and the compounding problem that this burns your domain reputation in the process.
Why the Numbers Look Different Now
The calculation for outbound pipeline has shifted materially in the last two years. This is not a claim about AI replacing salespeople — it is a narrower observation about where the economics of outbound have landed.
The research-and-writing component of SDR work — the part that consumes sixty to seventy percent of a typical SDR's day — can now be done faster, at higher quality, and without the ramp curve. That does not eliminate the value of a great salesperson. It does change the calculus for where to spend the first twelve months of your pipeline budget.
The companies getting the most leverage from this are not replacing their sales teams. They are running autonomous outbound in parallel while their account executives focus on closing. The pipeline arrives pre-qualified. The AEs work the deals. Nobody is spending sixty percent of their time doing research.
The Question Worth Asking
Before the next SDR hire, it is worth running the full number: salary plus benefits plus tools plus ramp period plus management time plus realistic first-year quota attainment. Then comparing that to what an alternative pipeline channel would cost to produce the same volume of qualified meetings.
The point is not that the SDR hire is wrong. In many cases it is exactly right. The point is that the decision is worth making with the real cost on the table, not just the salary line.
Most companies have never run that calculation with all the numbers in it. When they do, the decision often looks different.