An SDR who leaves after twelve months costs you close to a year of their fully loaded salary once you add recruiting, three months of ramp, the empty-seat months and the pipeline that was not created, and the bill is higher in France because notice periods and hiring cycles are longer. The fix is rarely a bigger salary. In our experience SDRs leave because the job is dial drudgery with no visible progress, and both of those are fixable. Here is the tenure-to-ROI math and the four changes that reduce churn.

The tenure math: when does an SDR pay back

An SDR produces nothing in month one and close to full output by month three or four. The Bridge Group's SDR Metrics research has put average ramp at around three months and average tenure under two years for several editions running. So a rep who stays 12 months gives you about nine productive months; one who stays 18 gives you 15; one who stays 24 gives you 21.

Put numbers on it. A ramped SDR with a trigger-based opener and a parallel dialer runs around 20 conversations a day, books 7-10% of them, and holds about 25 meetings a month in our experience. A 12-month tenure yields roughly 225 held meetings. An 18-month tenure yields 375, for 50% more cost. Tenure is the cheapest multiplier in the funnel, because the expensive part (ramp) is paid once.

What one departure actually costs

Build it bottom-up for your own team. Five lines cover most of it.

• Recruiting. An agency fee or 40 to 60 hours of manager and HR time, plus the sourcing tools.
• Empty seat. In France, a notice period of one to three months and a hiring cycle of one to two months. The seat produces nothing for that time, and the AE's pipeline dips a quarter later.
• Ramp of the replacement. Three months of full salary for a third of the output, plus the manager's coaching time.
• Lost knowledge. The territory, the personas who pick up, the objections that work. Not in the CRM, gone with the rep.
• Team effect. Each departure makes the next one more likely. This line is real and impossible to put a number on, so leave it as a note.

For a fully loaded SDR cost of €65,000, the first four lines land somewhere between half and a full year of that cost per departure, depending on how long the seat stays empty. With 30% annual turnover on a ten-person team, that is three departures a year and a six-figure bill that appears in no budget line.

Why SDRs leave, and why it is not the salary

Look at a day on a single-line dialer in France. At an average connect rate of 11.3%, 180 dials produce about 20 connects and maybe 8 to 10 real conversations. The other 170 dials are ringing, voicemail and gatekeepers. That is the job, every day, for a target that was set from a revenue plan rather than from the funnel.

In our experience, four things drive the exit conversation, in this order: the drudgery of the day, the absence of feedback that makes the next call better, a quota that the math says is unreachable, and no visible path to the next role. Salary comes up, but mostly as the reason given when the real reasons feel unprofessional to say out loud.

Four changes that reduce SDR churn

• Make the day about conversations, not dials. Parallel dialing gives reps about 5x more conversations in the same hours. A rep who has 20 conversations a day is doing sales; a rep who has 8 is doing telephony. The second one leaves.
• Set the quota from the funnel. Divide the meeting target by the rep's real meeting rate per conversation. If the daily conversations needed come out above 20, the quota is the problem, not the rep.
• Coach from transcripts, weekly. Discovery questions starting with "how" lift conversion by 190% in our data; asking "What do you mean?" before answering an objection lifts it by 197%. Reps stay where they get better, and they get better from specific feedback on specific calls.
• Write the path down. SDR to AE, or SDR to team lead, with the criteria and the usual timing. A rep who knows what 18 months buys them tends to stay 18 months.

A European note on turnover

Two things make the problem different from the US playbooks you will read. French employment law makes the empty-seat period longer (notice periods, trial periods, the time to a signed CDI), so each departure costs more months of output. And the SDR talent pool in Paris, Lyon or Berlin is smaller than in Austin, so a reputation for churn shows up in your next hiring cycle faster. Retention is a sourcing strategy here, not only an HR metric.

How Sonik approaches SDR turnover

We built Sonik around the first of the four changes, because it is the one a tool can deliver. Parallel dialing removes most of the ringing from a rep's day, and CRM signals (website visits, job changes, closed-lost, dormant leads) make more of the conversations relevant ones, with a 7-10% meeting rate instead of 2-3%.

AI call prep and summaries take the research and logging out of the day, and give managers a transcript-based view of every call for the weekly coaching that keeps reps improving. In our experience, the teams that move from 8 to 20 conversations a day describe a different job, and the people in it stay longer. We do not have a turnover benchmark yet; we have reps who say so.

Conclusion

SDR turnover is a funnel cost, not an HR line, and the ramp you pay for once is only recovered by tenure. Fix the day before you fix the salary band. This week, count the conversations, not dials, your reps had yesterday. If the median is under 10, you have found the reason they are reading job posts.