Telecom Cost as a Percentage of CAC: The Number Most Outbound Teams Ignore
Customer acquisition cost (CAC) is a board-level metric in most SaaS and high-growth businesses. Telecom is rarely broken out as a CAC component — it gets buried in "sales infrastructure" or "overhead." That omission leads to systematic underinvestment in telecom quality and systematic overinvestment in labor.
Why Telecom Gets Buried in CAC
The accounting convention is the problem. Telecom invoices arrive monthly, aggregate across all campaigns and users, and are typically expensed to a cost center labeled "communications" or "IT." Sales and marketing leadership rarely see it as a variable tied to deal volume.
Labor — salaries, benefits, commissions — is the visible line item. Technology (CRM, dialer, data enrichment) is the second-largest. Telecom sits third or fourth, often below $2/seat/day, and gets treated as a rounding error.
That treatment is correct when telecom is truly small relative to the deal economics. It stops being correct when the telecom configuration is actively suppressing answer rates — in which case, the "rounding error" telecom line is costing multiples of its face value in missed closes.
Isolating Telecom in CAC
A clean CAC model for outbound calling separates four cost layers:
| Layer | Monthly cost (25 agents, US) | % of CAC contribution |
|---|---|---|
| Agent labor (fully loaded, $38/hr, 168 hr) | $159,600 | ~87% |
| Management + QA | $10,833 | ~6% |
| Technology ($8/agent/day × 22 days) | $4,400 | ~2.4% |
| Telecom (flat-rate, UnlimCall) | $2,475 | ~1.4% |
| List / data (refresh) | $2,000 | ~1.1% |
| Total monthly cost | $179,308 | 100% |
If this program closes 200 deals per month:
CAC = $179,308 ÷ 200 = $896.54
Telecom contribution to CAC = $2,475 ÷ 200 = $12.38 per deal
Telecom is 1.4% of CAC. By itself, that is not a significant optimization target. But the number changes when you account for what telecom quality does to deal volume.
The Indirect Telecom-to-CAC Relationship
Telecom configuration affects two upstream variables that each have large CAC impact:
Answer rate. If your caller ID is toll-free or unlabeled and answer rates are running at 10% rather than 20%, your 25 agents are generating half the connects they could. To get 200 closes at a 4.5% close rate from 10% answer rate, you need 200 ÷ 0.045 ÷ 0.10 = 44,444 dials. At 20% answer rate, you need 22,222 dials — the same output from roughly half the dial volume, or the same dial volume generating double the closes.
At 400 dials per agent per day and 20 working days, 25 agents generate 200,000 dials per month. At 10% answer rate: 200 closes. At 20% answer rate: 400 closes.
| Answer rate | Monthly closes (25 agents) | CAC (same cost base) |
|---|---|---|
| 10% | 200 | $896 |
| 15% | 300 | $598 |
| 20% | 400 | $448 |
A 10pp answer rate improvement — achievable through local caller ID on UnlimCall's 33-market network — halves CAC without any change to labor, technology, or management cost.
Number spam-flagging. A number that is flagged as "Spam Risk" by major carriers can take answer rates from 18% to 4–6%. When this happens to a per-minute carrier's number pool, you are still paying for every attempt. Your CAC silently doubles or triples while the telecom line item remains stable. On-demand caller ID generation eliminates pool aging — the number has never dialed before, so it cannot be spam-flagged.
Per-Minute vs. Flat-Rate: The CAC Difference
On per-minute billing, the telecom contribution to CAC is variable and correlated with campaign performance. When answer rates fall (list decay, spam flags, off-hours dialing), more dials are required per close and telecom cost per close rises.
Model:
- Per-minute rate: $0.012/min
- Average attempt duration: 90 seconds (mix of unanswered 30s and answered 7-minute calls)
- 200,000 dials/month: 300,000 minutes at $0.012 = $3,600/month
- At 200 closes: $18/close in telecom (vs. $12.38 flat-rate)
- At list decay month 3 (50% more dials for same closes): $27/close
On flat-rate, telecom per close rises only if close count falls — and even then, it is bounded by the seat cost ceiling.
| Scenario | Per-minute telecom/close | Flat-rate telecom/close |
|---|---|---|
| Fresh list, peak performance | $14 | $12.38 |
| Month 2 list decay | $19 | $12.38 |
| Month 3 deep penetration | $28 | $12.38 |
The flat-rate floor means CAC models do not need a telecom uncertainty range. The telecom line is exact.
Benchmarking Telecom as a % of CAC by Vertical
How much of your CAC should telecom consume? Industry patterns:
| Vertical | Average CAC | Typical telecom/close | Telecom as % of CAC |
|---|---|---|---|
| B2B SaaS (inside sales) | $800–$1,500 | $10–$18 | 1–2% |
| Mortgage / lending | $300–$600 | $8–$15 | 2–4% |
| Insurance | $200–$450 | $6–$12 | 2–5% |
| Debt collection (per account) | $15–$40 | $2–$5 | 10–18% |
| Solar / home services | $300–$700 | $9–$16 | 2–4% |
For most B2B and higher-ticket verticals, telecom is a 1–3% CAC component. For high-volume, low-ticket operations like collections, telecom is structurally more significant and flat-rate discipline has higher leverage.
What Telecom Optimization Actually Achieves
Optimizing telecom directly reduces CAC by 1–2% in most programs. That matters, but it is not the primary argument. The primary argument is:
- Better telecom configuration (local caller ID, fresh numbers) → higher answer rate
- Higher answer rate → more closes per agent per day
- More closes per agent per day → lower labor cost per close → lower CAC
The path is indirect, but the CAC impact is 30–50% when answer rate improves substantially. The ROI of local caller ID quantifies this directly.
Takeaways
Telecom is 1–3% of CAC in most outbound programs — small as a direct cost line but structurally important because it controls answer rate, which drives the denominator in every CAC calculation. Flat-rate telecom fixes the direct cost; local caller ID across 33 markets lifts the answer rate that determines how many closes your fixed labor cost can generate.
Start With the Telecom Line Fixed
See per-seat flat-rate pricing for all 33 markets and lock telecom as a known, bounded CAC input. Explore the network to see local caller ID coverage.