Two rate sheets can quote $0.006 per minute to the same destination and still produce a 20% cost gap once the invoice arrives. The headline per-minute figure is only one input in wholesale VoIP pricing — billing increments, FAS practices, minimum commitments, and route quality all move the true landed cost, and providers that look identical on paper often are not.
Most buyers compare wholesale providers by scanning a single column of per-minute rates. That approach misses how differently pricing models are actually structured: per-minute, tiered, and committed-volume agreements shift risk and reward in very different ways, and each has its own set of fees that never appear in the headline number. This guide walks through the mechanics of wholesale VoIP pricing so you can read a rate sheet the way a pricing analyst does, not the way a marketing page presents it.
A rate sheet lists a price per minute by destination, but that figure describes the ceiling, not the bill you will actually pay. The landed cost — what you are charged after billing increments, answer-detection practices, and volume-based discounts or penalties are applied — routinely diverges from the quoted rate by 10% or more, and buyers who never reconcile the two are effectively negotiating blind.
This gap exists because a per-minute rate is a unit price, not a total cost model. Two providers quoting the identical $0.006/min rate to the same country can produce meaningfully different invoices depending on how they round call durations, whether they bill for unanswered attempts, and what commitments trigger rate changes mid-contract.
At low call volumes, small billing mechanics differences are rounding errors. At millions of minutes a month, a 5% gap between quoted and landed cost is real money — often larger than the margin difference between two competing rate sheets. Comparing providers on landed cost rather than headline rate is the single highest-leverage habit a wholesale buyer can build.
Per-minute pricing charges a single fixed rate per destination regardless of monthly volume. It is the simplest structure to model and compare, and it suits buyers with unpredictable or seasonal traffic who don't want to risk falling short of a commitment. The tradeoff is that per-minute rates sit at the higher end of the market because the provider carries all the volume risk.
Committed-volume pricing offers the lowest per-minute rate in exchange for a guaranteed monthly minute floor, billed whether or not you use it. This structure delivers the best unit economics for predictable, high-volume traffic, but it converts a variable cost into a fixed obligation — underestimate your volume and you pay for minutes you never sent.
False Answer Supervision (FAS) is a billing practice where the clock starts before the far end genuinely answers — sometimes triggered by network tones, IVR intercepts, or voicemail pickup. Because the effect compounds across every failed or borderline attempt, FAS can silently inflate an invoice by 10–15% versus a provider that bills only confirmed connected seconds, even when both quote the same headline rate.
Rate sheets specify a billing increment — commonly written as 1/1, 6/6, or 60/60 — describing the initial billing block and the rounding block thereafter. A 60/60 increment rounds every call up to the nearest full minute, which quietly penalizes short-duration traffic like IVR-heavy contact center calls; a 6/6 increment bills much closer to actual usage and is the fairer standard for most traffic mixes.
None of these line items show up in the single per-minute number most buyers use to shortlist providers, which is exactly why two seemingly identical rate sheets can produce very different bills.
A cheap rate on a poor-quality route is not actually cheap. If a route's Answer-Seizure Ratio (ASR) is 40% instead of a healthy 65%, you are paying seizure and signaling costs on far more failed attempts to complete the same number of successful calls — the effective cost per connected minute rises even though the quoted per-minute rate never changes.