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Cost & ROI

When Per-Minute Actually Wins: An Honest Comparison

Flat-rate per-seat billing is not the optimal carrier structure for every outbound operation. There are specific conditions under which per-minute pricing is genuinely cheaper and more appropriate — and this post identifies them clearly.

The Honest Answer: Low Utilization

Per-minute billing wins when your agents dial below the break-even threshold. At $0.0085/min and UnlimCall's flat-rate of $99/seat/month, the crossover is 11,647 billed minutes per seat per month. Below that threshold, per-minute is cheaper.

That translates to approximately 582 billed minutes per agent per day across 20 working days. An agent generating fewer billed minutes than that is better served on per-minute billing — unless the administrative simplicity of flat-rate has value that offsets the cost premium.

Use Case 1: Part-Time or Low-Intensity Agents

A solar appointment setting operation staffs agents at 3 hours per day, 15 days per month (part-time schedule aligned to homeowner availability in evening windows). With a 25% connect rate and 3:1 pacing:

MetricValue
Active dial hours/month per agent45 hours
Total dials8,100
Billed minutes (talk + VM + no-answer)~5,400
Per-minute cost at $0.0085$45.90
Flat-rate cost$99.00

Per-minute saves $53.10 per seat per month on this profile. At 20 seats, that is $1,062/month — $12,744/year. Per-minute clearly wins. See the break-even analysis to run this calculation with your own numbers.

Use Case 2: Infrequent Campaign Bursts

Some operations do not dial continuously. A nonprofit running phone banking campaigns 4 times per year — one week each — generates approximately 1,000 billed minutes per seat per campaign. Annual total: 4,000 billed minutes per seat.

Paying $99/seat/month for 12 months costs $1,188 per seat per year. Paying $0.0085/min for 4,000 billed minutes costs $34 per seat per year. Per-minute wins by $1,154 per seat annually.

This use case is better served by a daily rate structure. UnlimCall's daily rate is $5/agent/day — a monthly equivalent of $99 only if you activate for all 20 working days. For teams running 20 campaign days per year, the daily rate is $100/seat/year ($5 × 20 days), competitive with per-minute for low annual usage. For teams dialing fewer than 20 days per year, per-minute or daily-rate per-use billing wins outright.

Use Case 3: Low-Pacing Ratio Campaigns (Preview Dialing)

Preview dialing — where an agent reviews contact information before initiating each call — generates minimal non-connected billed events. The agent initiates dials intentionally, one at a time, and typically has connect rates of 50–70% because they are selecting high-quality contacts.

MetricPreview dialPredictive dial
Connect rate60%20%
Pacing ratio1:14:1
Billed min per 100 dials~85~78
Conversation min per 100 dials18060
Billed/conversation ratio0.471.30

On preview dialing, conversation minutes exceed total billed minutes because high-value calls run long. The rate card rate is nearly the effective rate. Per-minute billing works well in this environment — and if agents are dialing a small number of high-value contacts per day, total billed minutes may stay well below 11,647/month.

Use Case 4: Very Small Teams (Under 5 Seats)

At 1–4 seats, per-minute billing saves money almost regardless of dial intensity, because the absolute cost difference is small:

SeatsPer-minute (12,000 min/seat at $0.0085)Flat-rate ($99/seat)Difference
1$102$99Flat-rate saves $3
2$204$198Flat-rate saves $6
3$306$297Flat-rate saves $9
5$510$495Flat-rate saves $15

At 12,000 billed minutes — just above the crossover — flat-rate saves almost nothing at this scale. At 10,000 billed minutes (below crossover), per-minute saves $8.50 per seat. For a 3-person team, neither difference is worth the operational overhead of evaluating it.

The decision for very small teams is not per-minute vs flat-rate — it is whether to commit to a dedicated SIP carrier at all versus using a pay-as-you-go softphone service.

When Per-Minute Is Structurally Preferred

Summarizing the cases where per-minute wins or is at least competitive:

ScenarioPer-minute advantage
Part-time agents (<3 hr/day)Significant — often 40–50% cheaper
Episodic campaigns (<100 days/year)Major — annual cost 10–30× lower
Preview dialing, high connect rateModerate — effective rate near rate card
Teams under 5 seatsMarginal — difference is small either way
Negotiated rates below $0.006/minDepends on volume discipline

Where to Draw the Line

The recommendation is straightforward: if your agents dial more than 25 hours per week, on lists with connect rates below 25%, in predictive or power dialer mode — flat-rate will be cheaper or competitive at essentially any team size above 5 seats.

If your operation does not fit that profile, per-minute is worth keeping. The per-minute billing comparison page lets you model both structures with your own inputs.

Takeaways

  • Per-minute billing wins below 11,647 billed minutes per seat per month at $0.0085/min.
  • Part-time agents, infrequent campaigns, preview dialing, and very small teams are the clear per-minute use cases.
  • Daily-rate billing ($5/agent/day) is an intermediate option for operations that dial fewer than 20 days per month.
  • For full-time outbound agents on predictive or power dialing with any list quality degradation, flat-rate typically wins by month 2–3 of a campaign.

Not Sure Which Model Fits?

Review the full pricing grid at UnlimCall — flat-rate and daily-rate options available, 33 markets live. The math is transparent; model it against your actual billed-minute history.