Outbound Cost Modelling: 10 to 500 Seats

Methodology

All models use the following shared assumptions:

• 20 working days per month
• 5 hours of active dialing per agent per day
• 3:1 average pacing ratio (between power and predictive)
• 20% connect rate on a mixed warm/cold list
• 45-second average voicemail billed duration, 6-second minimum on no-answers
• Per-minute rate: $0.0085/min (estimate; verify current carrier rates; assumptions shown)
• Flat-rate: $99/seat/month for US/CA via UnlimCall's network

Billed minutes per agent per day calculation:

• Total dials: 5 hr × 60 min × 3 pacing = 900 dials
• Connected calls: 900 × 20% = 180 calls × avg 3 min = 540 min talk time
• Voicemail events: 900 × 15% = 135 VMs × 0.75 min = 101 min
• No-answer billed: 900 × 65% = 585 × 0.1 min = 59 min
• Total billed per agent per day: ~700 minutes
• Monthly billed per seat: 14,000 minutes

At 14,000 billed minutes/seat/month, per-minute cost is $119/seat vs flat-rate $99/seat. Flat-rate wins at this dial intensity.

10 Seats

At 10 seats with moderate dialing intensity, flat-rate saves approximately $2,400/year. The gap is meaningful for a small team but not business-critical. At this size, the primary benefit of flat-rate is budget predictability, not magnitude.

Note: caller ID numbers for 10 markets are available on demand across UnlimCall's 33-country network — not drawn from a fixed inventory pool.

50 Seats

At 50 seats, flat-rate saves approximately $12,000/year. This is a meaningful budget line — enough to fund a full-time outbound agent. The per-minute billing comparison shows additional scenarios at 50 seats with varying dial intensity.

100 Seats

At 100 seats, the annual savings are $24,000. At this scale, operations teams typically negotiate per-minute rates. A negotiated rate of $0.007/min reduces per-minute cost to $9,800/month — nearly equal to flat-rate, but with remaining usage variance risk and minimum commitment obligations.

The strategic advantage of flat-rate at 100 seats is not cost savings alone: it is the elimination of carrier invoice variance, which at this scale can swing $3,000–$8,000/month depending on campaign intensity.

500 Seats

At 500 seats, a well-negotiated per-minute rate can beat flat-rate by approximately $4,000/month ($48,000/year). However, this requires sustained volume to maintain the negotiated tier, minimum commitments that expose you to overage risk during slow periods, and dedicated carrier account management.

Flat-rate at 500 seats offers $49,500/month regardless of dial intensity, campaign mix, or seasonal variance — with no minimum commitment.

Variance Is a Hidden Cost

The per-minute models above assume consistent dial intensity every month. In practice:

• Q4 outbound campaigns run 30–40% hotter than Q1
• List launches push pacing ratios higher for 2–3 weeks
• Training periods reduce agent output

On per-minute billing, these variations translate directly to invoice swings. A 30% campaign intensity spike on a 100-seat floor adds approximately $3,570 to a single month's carrier bill. That spike shows up on an invoice 30 days after the spend.

Flat-rate eliminates this variance entirely. See flat-rate economics for high-volume operations for the impact on gross margin.