SDR to AE ratio calculator: how many SDRs and team leads you need
How many SDRs per AE? Short answer
On average, 1 SDR supports 2.4 AEs (Bridge Group 2025, steady since 2018). The most common model is 1 SDR to 2 AEs, used by 31% of companies. Smaller companies run more SDRs per AE.
Try it: SDRs for your AE team
The defaults are Bridge Group 2025 averages. That is 2.4 AEs per SDR and 6.4 SDRs per leader.
Twelve AEs at the average ratio need five SDRs and one team lead. Treat the answer as a starting point, then adjust for your motion.
How the calculator works
It divides AEs by the AEs-per-SDR ratio and rounds to a whole SDR. It then divides SDRs by your span of control and rounds up to whole leaders.
See inside
Benchmarks to start from
| Measure | Bridge Group 2025 |
|---|---|
| Average AEs per SDR | 2.4, steady since 2018 |
| Most common model | 1 SDR to 2 AEs, at 31% of companies |
| Average SDRs per first-line leader | 6.4, down from 8 in the 2021 to 2023 editions |
The report covers 351 B2B companies, mostly North American SaaS. Smaller companies tend to run more SDRs per AE.
When to change the numbers
- Use fewer AEs per SDR if AEs need a steady flow of meetings from outbound.
- Use more AEs per SDR if most pipeline comes from inbound or marketing.
- We estimate that past about eight SDRs per leader, weekly coaching gets hard without a lead.
Sources
Next, read SDR team structure. Then plan the manager's first months with the SDR manager first 90 days guide.
Questions
What is a good SDR to AE ratio?
The Bridge Group 2025 report found an average of 1 SDR to 2.4 AEs. The most common model is 1 SDR to 2 AEs.
How many SDRs should one manager lead?
The same report found an average of 6.4 SDRs per first-line leader. We estimate coaching gets hard past about eight.
Does the ratio change by company size?
Yes. Smaller companies tend to run more SDRs per AE, and the ratio rises with company size.
Also: SDR capacity planner.
Related guides
SDR team structure
SDR to AE ratios, span of control and when to add a team lead.
SDR manager first 90 days
Learn, stabilise, improve: a week-by-week plan for new managers.
SDR and BDR KPIs
What to measure, and 2024-2025 benchmarks to sense-check against.
Turn this into a programme you can run
14 Notion modules and 6 working trackers for SDR leaders. KPI library, comp calculator, cadence builder, interview scorecard, tool scorecard and a 90-day roadmap. £29, one payment, plus VAT for UK and EU buyers.
Treat benchmarks as starting points. Tune them to your market, deal size and sales cycle. Every figure shows its source and year.