We published a broader comparison of AI cold calling vs human SDRs that covers quality, scalability, and use cases. This post goes deeper on the one thing most people want to know first: the money.

What does a human SDR actually cost when you add everything up? What does an AI SDR cost at different volumes? And where is the breakeven point?

The True Cost of a Human SDR

Most people think of SDR cost as the salary on the job listing. That is only the starting point. Here is what a single SDR actually costs a company in the United States.

Base salary: $45,000 to $65,000 per year for a junior SDR. $65,000 to $85,000 for experienced. In high cost-of-living markets like SF, NYC, or Boston, add 20% to 30%.

Variable compensation: Most SDR comp plans include a bonus or commission component of $10,000 to $25,000 per year. This is on top of base salary.

Benefits and payroll taxes: Health insurance, 401(k) match, payroll taxes (FICA, unemployment). This adds 25% to 35% on top of the total cash compensation. On a $60,000 base + $15,000 variable, benefits add roughly $18,000 to $26,000.

Tools and software: CRM seat ($100 to $300/month), dialer ($100 to $200/month), sales engagement platform ($100 to $200/month), phone/headset, email tools. Total: $300 to $700 per month, or $3,600 to $8,400 per year.

Management overhead: An SDR manager typically manages 6 to 10 reps. If the manager costs $120,000 fully loaded, that is $12,000 to $20,000 per SDR per year in management cost.

Recruiting and training: Average cost to hire an SDR is $4,000 to $8,000 (recruiting fees, interview time, onboarding). Training takes 2 to 4 weeks during which the SDR is not productive but is being paid. With average SDR tenure of 14 months, you are recruiting and training roughly once a year.

The fully loaded total: For a mid-range SDR in the US, the fully loaded annual cost is typically $95,000 to $140,000. That is $7,900 to $11,700 per month.

Most sales leaders know the salary. Few have calculated the fully loaded number. When you include everything, a single SDR costs roughly twice their base salary.

The True Cost of an AI SDR

AI SDR costs are more straightforward but vary by volume.

Platform subscription: $200 to $2,000 per month depending on the platform and tier. This covers the dashboard, analytics, CRM integrations, and support.

Per-minute voice costs: $0.08 to $0.30 per minute of conversation. A typical cold call that connects is 2 to 4 minutes. Calls that go to voicemail are 15 to 30 seconds.

Telephony costs: Some platforms include phone numbers and carrier costs. Others charge separately. Expect $1 to $3 per phone number per month plus $0.01 to $0.03 per minute in carrier charges.

Setup and maintenance: Initial setup (scripts, integrations, testing) typically takes 10 to 40 hours. Ongoing optimization (script updates, A/B tests, performance review) takes 2 to 5 hours per week. If done by a consultant, expect $100 to $200 per hour. If done internally, it is an opportunity cost.

Cost at Different Volumes

Here is what an AI SDR costs at three common call volumes, assuming $500/month platform fee and $0.15/minute voice costs.

50 calls per day (1,000/month): Assuming 20% connect rate, 200 connected calls averaging 3 minutes each = 600 minutes. Voice cost: $90. Plus 800 voicemail drops at 0.5 minutes = 400 minutes, $60. Platform: $500. Total: roughly $650 per month.

200 calls per day (4,000/month): 800 connected calls at 3 minutes = 2,400 minutes ($360). 3,200 voicemails at 0.5 minutes = 1,600 minutes ($240). Platform: $500. Total: roughly $1,100 per month.

500 calls per day (10,000/month): 2,000 connected calls at 3 minutes = 6,000 minutes ($900). 8,000 voicemails at 0.5 minutes = 4,000 minutes ($600). Platform: $1,000 (higher tier). Total: roughly $2,500 per month.

The Direct Comparison

At 200 calls per day, which is roughly what a productive human SDR can manage:

Human SDR: $8,000 to $11,000 per month (fully loaded).

AI SDR: $1,100 per month.

That is a 7x to 10x cost difference at the same call volume.

But the AI can also do 500 calls per day for $2,500 per month. To match that volume with humans, you would need 2 to 3 SDRs at $16,000 to $33,000 per month.

The cost gap widens as volume increases because AI calling costs scale linearly while human costs scale in steps (each new hire is another $8,000+ per month).

What the Numbers Do Not Capture

The cost comparison above is real but incomplete. Here are the factors that do not show up in a spreadsheet.

Human SDRs build relationships. A good SDR who connects with a prospect can build rapport that leads to a warmer handoff. The AI qualifies efficiently but does not charm anyone. For complex B2B sales, this matters more than the cost difference.

Human SDRs handle the unexpected. When a prospect says something completely off-script, a human adapts. An AI agent handles it reasonably well for common objections but can stumble on truly novel situations.

AI never has a bad day. Every call gets the same energy, the same script execution, the same follow-through. Human performance varies by day, by mood, by how close they are to burning out.

AI scales instantly. Need to call 10,000 leads from a trade show by Friday? An AI agent handles it without hiring, training, or overtime. A human team cannot spin up that fast.

Turnover is a hidden cost killer. With 14-month average tenure, you are perpetually recruiting, training, and ramping SDRs. The AI does not quit. It does not need a promotion path. It does not get recruited by a competitor.

The Hybrid Model

Most companies that get the best results do not go fully AI or fully human. They use AI for the high-volume, repetitive calling (initial outreach, re-engagement, qualification) and humans for the high-value conversations (discovery calls, demos, relationship-building).

In this model, AI handles 80% of the dial volume at 10% of the cost, and humans focus on the 20% of conversations that require real skill and judgment. The total spend goes down while results go up because humans are spending their time on the calls that actually convert.

For a practical guide on setting this up, start with our step-by-step guide to automating cold calling, then read our AI calling ROI analysis to build the business case.

AI SDR vs Human SDR: The Real Cost Breakdown for 2026