26 July 2026 VoxioTelecom Team
Per-second billing: how much you actually save
Most carriers round call duration up to the nearest 6 seconds — or worse, the nearest minute. Here's what that costs on a typical traffic mix.
The math nobody tells you about
A carrier that bills per-minute charges a full 60 seconds for a 3-second call. On outbound sales traffic — where 30-40% of calls are answered but hung up within 10 seconds — that adds up.
Example: 100,000 minutes/month, 20% short calls
- Per-minute billing: 100,000 minutes × $0.02 = $2,000
- Per-6s billing: effective duration inflation ≈ 5%, so $2,100
- Per-second billing (VoxioTelecom): actual duration, no inflation → $2,000 exact
But if 20% of your calls are answered-and-dropped within 8 seconds:
- Per-minute: those 20,000 calls are billed as 60s each → an extra 17,000 minutes → +$340
- Per-second: you pay only for the 8s you used → $0 extra
Over a year, on a modest 100k min/month operation, that's $4,000 saved — just from not rounding.
Why some carriers still round
Because they can. Legacy TDM switches billed in 6s increments and nobody bothered to update the billing when they migrated to SIP.
We built VoxioTelecom on MagnusBilling with per-second granularity from day one.
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