Why is calling a mobile in the same city more expensive than a landline abroad?

Because the charge follows the receiving network's termination rate, not distance. Mobile networks in many countries charge callers' carriers a per-minute fee that landline networks don't, and it passes straight through to your rate card.

Are free app-to-app international calls a business alternative?

For ad-hoc calls, sometimes; for a business number with caller ID, call recording, queues and accountability, no — the call must ride your phone system to inherit its identity and controls. The comparison is about unmanaged convenience vs managed communication.

What is a 'grey route'?

A low-cost termination path that may pass through intermediaries who strip or alter caller ID and degrade quality. It explains suspiciously cheap rates — and a share of 'our calls show as unknown number abroad' complaints.

VoIP Costs

International Calling Rates Explained

By the VoIP Cost Guide Editorial Team | Last updated: October 2026

Domestic 'unlimited' has trained businesses to stop reading rate cards — right up to the first invoice with a four-figure international line. International VoIP pricing is per-minute, per-destination, and full of structure: billing increments, landline-vs-mobile splits, and routes whose quality and price vary by an order of magnitude for the same country.

This guide explains how the pricing works, the five traps that inflate bills, and how to model your real international spend from call records before choosing a plan or add-on bundle.

How the rate card actually works

Each destination has a per-minute rate that depends on the termination type: calls to landlines in developed markets are cheap (fractions of a cent to a few cents per minute at published VoIP rates), calls to mobile phones in the same country often cost 3–10× more because the receiving mobile network charges termination fees, and some destinations (satellite, premium ranges, certain island and developing-market routes) run to dollars per minute. Two structural multipliers ride on top: billing increments — a 60-second minimum with 6- or 30-second increments means a 20-second call can bill as a full minute — and connection/minimum fees on some routes. 'Unlimited international' bundles invert the model: a flat per-user add-on covering a listed set of countries (usually landlines, fair-use capped).

Call type (illustrative published-rate bands)	Typical per-minute band
Canada / Western Europe landline	$0.01–$0.03
Western Europe mobile	$0.05–$0.20
India landline/mobile	$0.015–$0.04
Mexico mobile	$0.05–$0.12
High-cost/special destinations	$0.50–$3.00+

The five traps

Mobile termination: the team calls 'London' — but the number is a UK mobile and bills at 6× the landline rate.
Wrong rate deck: two providers' 'UK' rates differ because one uses premium routes; cheap grey routes also mean worse quality and caller-ID failures.
Fair-use bundles: 'unlimited' add-ons exclude mobiles, cap minutes, and exclude the one country you actually call.
Rounding: 60/60 billing on many short calls (sales dials, confirmations) multiplies effective cost versus 6-second increments.
Fraud: international revenue-sharing fraud targets compromised PBXs on weekends; a single incident can exceed a year of legitimate spend. Rate caps and destination blocks are budget tools, not just security tools.

Model your international spend before you buy a bundle

Pull 90 days of call detail: group international minutes by destination AND by landline/mobile (prefix analysis or your provider's report).
Price your actual minutes on two candidate rate decks, applying each deck's billing increments — not the headline per-minute rate.
Compare against bundle add-ons: bundle price × users who call internationally vs your modeled metered total. Bundles win only for concentrated, landline-heavy calling.
Set guardrails whatever you choose: per-call and monthly spend alerts, destination allow-lists, and after-hours international blocking on unused extensions.
Re-check quarterly: destinations and volumes drift, and rate decks change without announcement.

Frequently asked questions

Why is calling a mobile in the same city more expensive than a landline abroad?: Because the charge follows the receiving network's termination rate, not distance. Mobile networks in many countries charge callers' carriers a per-minute fee that landline networks don't, and it passes straight through to your rate card.
Are free app-to-app international calls a business alternative?: For ad-hoc calls, sometimes; for a business number with caller ID, call recording, queues and accountability, no — the call must ride your phone system to inherit its identity and controls. The comparison is about unmanaged convenience vs managed communication.
What is a 'grey route'?: A low-cost termination path that may pass through intermediaries who strip or alter caller ID and degrade quality. It explains suspiciously cheap rates — and a share of 'our calls show as unknown number abroad' complaints.

Sources and further reading

Related guides

Disclaimer: This guide is educational information based on published VoIP standards and professional practice, not engineering advice for your specific system. VoIP pricing, taxes and fees change and vary by provider and location — verify current figures with providers before purchasing. If your phone system supports emergency calling, work with your provider or a qualified VoIP engineer for changes that affect E911.