What is Telecom Expense Management?

» What is TEM?

By Michael Giffney, Director, VoicePlus. Published 2 October 2026.

Telecom Expense Management (TEM) is the systematic audit, control and optimisation of an organisation's telecommunications spend across mobile, fixed voice, data and IoT services. It combines invoice auditing, inventory management, usage optimisation and contract governance into a single discipline. It verifies that every charge on every carrier bill matches what was contracted, and eliminates the services, plans and errors that quietly inflate telecom cost.

Across Australia and New Zealand, TEM typically recovers 5 to 15 percent of annual telecom spend in the first year, with continuing savings from ongoing governance.

TEM applies to the whole telecommunications estate: corporate mobile fleets, fixed voice and data circuits, network links between sites, and IoT or machine-to-machine connectivity. It is normally delivered either as software your team operates, or as a managed service where a provider performs the audit and optimisation work on your behalf.

In This Guide

The Core Functions of TEM

Invoice Auditing

Every charge on every carrier invoice is validated against the contracted rate, the active service inventory and the agreed terms. Discrepancies are identified, disputed with the carrier, and pursued through to recovered credit, including back-billing for the full period an error was in effect rather than only the month it was found.

This is the function that produces most first-year savings, and the one that most distinguishes providers. Software can flag an anomaly. Recovering the credit requires someone to argue the case with the carrier, with the contract in hand, and keep arguing until it is paid.

Inventory Management

A single authoritative record of every service in the estate: which SIM, which device, which user, which cost centre, which carrier, which plan, which contract end date. Without it, auditing is impossible. You cannot identify a service that should not exist if you do not know what exists.

Usage and Plan Optimisation

Analysis of actual consumption against contracted plans. Inactive services are cancelled or redeployed, data pools right-sized, and users on the wrong plan moved. This is where continuing savings come from once the one-off audit recoveries are banked.

Cost Allocation and Chargeback

Telecom costs assigned accurately to business units, cost centres and projects, so the departments generating the spend see it, and finance can reconcile telecom against budget without manual reconstruction.

Contract and Tender Governance

Tracking vendor agreements, renewal windows and benchmark pricing so renegotiation happens from a position of evidence rather than at the carrier's prompting. In larger organisations this extends to running carrier tenders and validating the resulting pricing.

What TEM Delivers

Recovered cost: billing errors, unused services and mis-rated charges corrected and credited back. Most of this arrives in the first twelve months.
Ongoing savings: plan optimisation, pooling and service rationalisation applied continuously rather than at contract renewal.
Financial visibility: telecom spend attributable by user, service, cost centre and carrier, reportable to finance in the form finance actually needs.
Governance and security posture: an accurate service inventory is a control requirement under ISO/IEC 27001 and the precondition for most ACSC Essential Eight mitigation strategies. It is also the input to offboarding and access control. How TEM supports governance and compliance.
Reclaimed time: invoice processing, carrier disputes and cost-centre reconciliation absorb significant finance and IT effort. TEM removes most of it.
Commercial leverage: with consolidated visibility, running several carriers becomes no harder than running one, which restores competitive tension at renewal. Multi-carrier telecom management.

What TEM Looks Like in Australia and New Zealand

Multi-carrier by accident: most enterprises across the region span Telstra, Optus and TPG in Australia, Spark, One NZ and 2degrees in New Zealand, and frequently both, through acquisitions, coverage gaps, legacy contracts and departmental autonomy rather than by design. Trans-Tasman organisations routinely run separate carrier relationships on each side with no consolidated view of either.
Distinct billing structures: Australian and New Zealand carrier formats, rate structures and dispute processes differ from their US and European equivalents, and from each other. Experience with the specific carriers matters more than platform features.
Procurement and compliance obligations: government and enterprise buyers in both countries operate under tender requirements, panel arrangements and information security standards, including ISO/IEC 27001 and the ACSC Essential Eight in Australia, and the NZISM and Protective Security Requirements in New Zealand. Telecom spend records form part of that evidence base.
Roaming and remote connectivity: international roaming and remote-site connectivity carry cost exposure unusually high relative to fleet size, and unusually easy to leave unmanaged. Trans-Tasman travel makes this a standing cost for organisations operating on both sides.

How VoicePlus Delivers TEM

VoicePlus is Australia's first independent managed mobility provider, operating with no carrier affiliations or commission arrangements, and the only Australian company recognised in the Gartner Market Guide for Managed Mobility Services.

TEM is delivered through Atrium, the VoicePlus integrated managed mobility and endpoint platform, combining automated invoice ingestion and validation with a team that acts on what it finds, auditing charges, pursuing disputes to recovered credit, optimising plans and governing contracts on the customer's behalf.

Across our client base we have optimised $7.5 million in telecom spend, manage more than 25,000 devices, and have eliminated over 104,000 hours of manual administration through automation. VoicePlus is ISO/IEC 27001:2022 certified.

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Frequently Asked Questions

What does TEM stand for?

TEM stands for Telecom Expense Management. It is sometimes written as TEMS, for Telecom Expense Management Services, particularly where the offering is a managed service rather than software alone.

How much can TEM save?

Organisations across Australia and New Zealand typically recover 5 to 15 percent of annual telecom spend in the first year, with continuing savings from ongoing optimisation. The recoverable amount depends on how long the estate has gone unaudited, how many carriers are involved, and how far inventory accuracy has drifted. What does TEM cost, and how do you justify it?

What is the difference between TEM and managed mobility?

TEM covers the financial side: invoices, costs, contracts and usage. Managed mobility covers the operational side as well, including device procurement, staging, deployment, support, security and lifecycle. TEM is one component of a full managed mobility service.

Does TEM only cover mobile services?

No. TEM covers mobile, fixed voice, data, network and IoT services. Some providers limit their scope to mobile fleets, so it is worth confirming what a given provider actually audits.

How long does TEM implementation take?

Initial inventory reconciliation and the first audit cycle typically run six to eight weeks, depending on carrier count and how accessible historical billing data is. Recoveries usually begin in the first audit cycle.

Can TEM work across multiple carriers?

Yes, and it is where most of the value sits. Consolidating invoices, services and usage from every carrier into one view is what makes cross-carrier comparison and optimisation possible. Multi-carrier telecom management

My carrier already gives me a billing portal. Why pay for TEM?

A carrier portal presents the bill; it does not verify it. It is generated from the same billing system that produced the charge, sees only one carrier, and cannot lodge or pursue a dispute. Carrier billing portal vs TEM

My carrier offers TEM for free. Why would I pay for it?

A carrier-funded TEM service is recovered through your plan rate rather than the carrier's margin, usually as a higher-tier plan carrying inclusions that go unused. The uplift applies to every service and runs for the full contract term. It also creates a structural conflict, because the purpose of TEM is to reduce the revenue of the party funding it. How carrier subsidies are funded

Is TEM software or a service?

Both exist under the same label, and the difference is significant. A platform provides dashboards and reporting while your team acts on the findings. A managed service includes the analysts who audit charges, pursue disputes and optimise plans on your behalf. TEM software or managed service?