Setting the SDR-to-AE ratio from capacity math

Capacity math, timing and AI tooling, as five members of the B2B Sales work group weigh them.

Updated October 13, 2026

Work out the ratio from each AE's pipeline gap, and measure SDRs on the opportunities AEs accept.

Run the capacity math. Andy Mowat divides AE quota by ACV and win rate, subtracts what inbound and partners source, and divides the rest by what one ramped SDR produces. Kyle Poyar treats 1:1 as a starting default until there is conversion data.
Wait until the motion works. Cassie Young would build no SDR layer at seed or early Series A. Peter Kazanjy adds the first SDR once the motion is proven and the seller's calendar is the bottleneck, and checks AE win rates rep by rep before adding more.
Measure SDRs on accepted opportunities. Andy would have AEs accept or reject every SDR-sourced meeting in the CRM with a reason, and pay SDRs on the same definition.
Plan the ratio and the total separately. Kris Rudeegraap would start below 1:1, because Clay and LLM-personalized outbound let pipeline grow faster than headcount. Kyle agreed once the workflow is AI-assisted, and would let AE hiring set the total: in his job-post data, AI companies grew SDR headcount 106% in a year.

Group chat with Kyle, Peter, Andy, Kris, Cassie — the B2B Sales work group

Question:

How many SDRs should you hire for each account executive?

Andy MowatCMO at Inflection.io. Former VP of Revenue Operations at Carta

I'd skip the fixed ratio and back into it from capacity math, which is how I ran it as a RevOps leader at Culture Amp, Carta + Box. Start with the AE's quota. Divide it by ACV and win rate to get the opportunities each AE needs per quarter. Subtract what inbound, marketing + partners already source. Whatever pipeline is left over, divide by what one ramped SDR actually converts into qualified opps. That number is your SDR count... and it moves every quarter as inbound grows or win rates shift.

The ratio also depends heavily on segment. An enterprise AE closing a handful of big deals needs a few high-quality meetings. A velocity AE needs a lot more volume, so the SDR load per AE goes up.

In 2026 I'd be careful about solving the gap with headcount or with "AI SDRs." Most AI sales tools come down to sending more email, which I hate and so do most buyers

YouTube. What actually gets an exec like me to engage is a small-group dinner with 10 peers, a Warriors game, or really unique swag (someone once sent our CRO a bobblehead of himself)

YouTube. So I'd pair fewer, sharper SDRs with good signal data + workflows, and let the AE's pipeline gap set the hiring plan.

Cassie YoungPartner at Primary Venture Partners. Former Chief Commercial Officer at Sailthru

I agree with Andy's capacity math, and I'd push one step further: run the math and be ready for the answer to be zero. When I ran go-to-market at Sailthru, we deliberately moved away from traditional outbound selling toward referral and community-based sales. That shift improved LTV/CAC by 73% in six months, and referral deals closed faster, which made the core unit economics of every deal better

Apple Podcasts. Salary is the single biggest driver of CAC

YouTube, so every SDR you add has to beat the cost of your cheaper pipeline sources before they get a seat.

Timing belongs in the math too. At a 25% win rate you need roughly 4x coverage, and with a six-month sales cycle that pipeline has to exist two quarters ahead

YouTube. An SDR you hire today, who needs a quarter to ramp, won't fix next quarter's gap. Plan SDR hiring off the coverage you'll need two to three quarters out.

Stage matters most. At seed and early Series A, I wouldn't build an SDR layer at all. Your first enterprise AEs should own the full cycle, prospecting through close, so you learn which channel actually produces pipeline before you pay to scale it. Once you know, hire SDRs against the measured gap and track their meeting-to-opportunity conversion, so you can tell whether they're creating pipeline or just filling AE calendars.

Kyle PoyarFounder of Growth Unhinged. Former Operating Partner at OpenView

Andy's capacity math is the right method. If you need a starting point before you have conversion data, 1:1 is a reasonable default.

Warmly is a good example of making 1:1 work. Max and his team ran one SDR per AE and hired SDRs internationally to keep costs down. They also set AE quotas at 3x OTE instead of the old 5x, because they expected AEs to source some of their own pipeline. The ratio held up because the roles around it took work off the AEs: an inbound sales rep handled small deals and demo requests, and a sales assistant did admin and follow-ups.

growthunhinged

I'd be careful about Cassie's "be ready for zero" turning into the default, though. Founder-led and full-cycle AEs make sense early, but once you're past that stage the market data points the other way. I analyzed 120,798 GTM job posts, and AI companies grew SDR headcount 106% year-on-year. OpenAI, Cursor, Decagon and Legora are all hiring SDRs, so the companies supposed to be killing the role are the ones expanding it.

Their SDRs work differently, though:

1️⃣ Zero time on list building or deep account research

2️⃣ Warm accounts with intent or product-qualified signals

3️⃣ Back on the phone, with parallel dialers

4️⃣ Shared target account list with marketing

On AI SDRs, I agree with Andy about outbound email volume. Inbound is different. Voice agents that respond within two minutes, qualify, book the meeting and pass context to the AE are the most effective use I've seen.

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I suspect that changes the ratio. If AI covers inbound speed-to-lead, human SDRs can focus on outbound to warm accounts, and one SDR can support more AE capacity than the 2010s spray-and-pray SDR could.

Kris RudeegraapCo-CEO and co-founder of Sendoso. Former Senior Account Executive at Talkdesk

Kyle's list of how AI-native SDRs work matches what we saw at Sendoso. BUT... that's exactly why I'd start below his 1:1 default. For most teams in 2026 I'd plan fewer SDRs than AEs, because the "one SDR" in Andy's capacity math has changed a lot.

I ran that same spreadsheet playbook at Sendoso. You start from the revenue goal and ACV, back into the meetings you need, then hire enough junior SDRs to book them. We started hiring in San Francisco, quickly found the headcount cost and CAC were too high there, and moved the team to a cheaper location. Before Sendoso, at Talkdesk in 2015, we were hiring 15 AEs and 10 SDRs in one push, so roughly 1 SDR for every 1.5 AEs, and that felt normal then.

YouTube

BUT... that math assumed pipeline was a headcount stair-stepper, where more pipeline meant hiring the next SDR. Once we put Clay and LLM-personalized outbound in place, pipeline grew much faster than headcount. Enrichment, data cleanup, CRM checks and first-line personalization now run automagically, which frees SDRs to spend their hours on prioritized intent signals and actual selling. In my experience one SDR can now do the work of 10.

Apple Podcasts+1

How I'd do it today:

→ Run Andy's math, but measure meetings per SDR on an AI-assisted workflow before you set headcount. Don't use the 2015 benchmark.

→ Expect AEs to source some of their own pipeline with the same tooling. AEs have to do more outbound now than ever.

→ When an underperforming SDR leaves, decide whether the job needs a backfill or a better workflow before you rehire.

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→ Don't jump to zero SDRs. Going from a team of 50 to a team of 0 breaks the process and the leaders running it. Shrink the team gradually and give more of the role to someone who is technical and automation-minded.

Andy MowatCMO at Inflection.io. Former VP of Revenue Operations at Carta

Kris says measure meetings per SDR on the AI workflow before setting headcount. I'd measure one step later, because Cassie's "filling AE calendars" point is where most SDR ratio math breaks in practice, and AI tooling makes it easier to book meetings that go nowhere. The capacity model only works if the SDR conversion number is real, and in most orgs it isn't, because the handoff is fuzzy. Before you set any ratio, have the AE formally accept or reject every SDR-sourced meeting in the CRM, with a rejection reason. Then measure SDR output as accepted opportunities and pipeline dollars. Booked meetings alone won't tell you whether SDRs are creating pipeline.

Once you have a couple quarters of that data, the ratio question mostly answers itself. You'll see which segments SDRs actually move and which ones AEs or inbound already cover. I'd also comp SDRs on the same accepted-opp definition. If you pay on meetings, you get meetings, and your AEs end up with full calendars and thin pipeline.

That matters even more with the SDR model Kyle describes. If SDRs work warm, signal-qualified accounts off a shared list with marketing, you need a clean rule for who gets credit for the opp, or marketing + SDRs both claim it and your capacity math double-counts pipeline. The other thing I'd watch is ownership. SDRs reporting into sales vs. marketing changes which numbers they chase, so whoever owns them should also own the pipeline target they're measured against.

Peter KazanjyFounder of Founder-Led Sales Factory. Co-founder of Atrium and author of Founding Sales

Before you let a pipeline gap justify another SDR, look at win rates rep by rep. Andy's math and Cassie's coverage math both use a team-average win rate, and that average hides the real problem. On most teams, AE win rates vary a lot. The pipeline SDRs can generate is finite, so every SDR-sourced meeting routed to an AE who can't convert it is burned

YouTube. If one AE closes at half the rate of their peers, the cheaper fix is coaching or managing that rep out. Otherwise you're hiring SDRs to feed a leaky bucket, and the ratio looks like it needs to go up when it doesn't. Kris's point that tooling has multiplied SDR output makes this matter more. When pipeline gets cheaper to create, AE conversion becomes the constraint, so the variance in AE win rates is what should set the SDR count.

Then hold SDRs to the same unit economics as AEs: each head has to cover its own cost

YouTube. Andy's AE accept/reject rule is the right gate. I'd carry the measurement all the way to closed revenue by source, because an accepted opp can still die in stage two. If SDR-sourced opps close at a fraction of the rate of inbound or referral opps, your SDR count is inflated even if the meetings-booked numbers look great.

On timing, I'm with Cassie. With the founders I coach, the first SDR comes in only after the motion is proven and the seller's calendar is the bottleneck. At that point you add a sales development rep to fill the calendar, and that's the first time lead gen gets split off from selling

YouTube. Start with one SDR, instrument the funnel, and let a couple of quarters of conversion data set the ratio.

Kyle PoyarFounder of Growth Unhinged. Former Operating Partner at OpenView

Kris, I'll update my default. Starting below 1:1 makes sense once the workflow is AI-assisted. Warmly's 1:1 ratio came from a team still building that tooling.

A falling ratio doesn't mean fewer SDRs, though, and the hiring data shows both trends together. In the same 120,798 job posts, 3 in 5 open GTM roles were AEs or solution engineers, because buyers still want to talk to a human, even when they're buying AI. AI companies also doubled SDR headcount. My read is that AE hiring is growing so fast that SDR teams grow in absolute terms even if each SDR now covers more AEs.

The practical takeaway is to plan the ratio and the total separately. Use Andy's and Kris's AI-adjusted capacity math to set SDRs per AE. Then let AE hiring drive the total. Don't freeze SDR headcount just because each one is more productive.

It's also worth checking whether your org chart even calls the role "SDR." I'm seeing Account Associate, GTM Associate and Member of GTM Staff for what's basically the same seat. Some of that pipeline work is moving into GTM engineering, which is the only GTM role growing faster than SDRs at AI companies. If a GTM engineer's workflows are doing part of the SDR's job, count that capacity when you set the ratio.

On Andy's double-counting worry, I agree with using accepted opps as the measure. For credit, I'd give marketing and SDRs one shared ICP pipeline target on the shared account list, so neither team is fighting over attribution. Then count each opp once when you do the capacity math.

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Frequently Asked Questions

Setting the SDR-to-AE ratio from capacity math

B2B Sales

Frequently Asked Questions

How should a startup set up its CRM stages?

How do you book sales meetings at a conference?

How do you build a sales forecast you can trust?

What funnel conversion rates should a B2B team aim for?

What cadence works for founder cold outreach?

Your ideas, super powered.

Setting the SDR-to-AE ratio from capacity math

B2B Sales

Frequently Asked Questions

How should a startup set up its CRM stages?

How do you book sales meetings at a conference?

How do you build a sales forecast you can trust?

What funnel conversion rates should a B2B team aim for?

What cadence works for founder cold outreach?

Your ideas, super powered.