Telematics on Cars: What Fleet Managers Must Know

Telematics on cars refers to the technology that collects, transmits, and analyses data from vehicles — including speed, location, fuel consumption, engine diagnostics, and driver behaviour. For fleet managers running 5 to 500 vehicles, understanding what telematics does, what it costs, and where its limits lie is essential before committing to any system.

What Is Telematics on Cars and How Does It Work?

Telematics combines telecommunications and informatics to gather vehicle data through an onboard device — typically a black box or OBD-II (On-Board Diagnostics) plug-in unit connected to the vehicle’s diagnostic port. The device captures data from the vehicle’s CAN bus (Controller Area Network), the internal communication system that links the engine, transmission, brakes, and other components. That data is then transmitted via cellular networks (3G/4G/5G) to a cloud platform where fleet managers can view reports and act on insights.

Standard telematics hardware tracks parameters such as:

• Vehicle speed and acceleration events
• Harsh braking and cornering
• Engine idling time
• Fuel consumption per kilometre
• Odometer readings and trip history
• Diagnostic trouble codes (DTCs) — fault indicators from the vehicle’s onboard computer

According to the European Automobile Manufacturers’ Association (ACEA), over 75% of new passenger cars sold in the EU are now factory-fitted with some form of embedded connectivity, meaning many commercial fleets are inheriting telematics capability without purchasing aftermarket hardware.

How Much Does Fleet Telematics Cost?

Hardware-based telematics systems typically carry two cost layers: the upfront device cost and a monthly data subscription. Across the EU market, fleet managers should budget approximately:

For a fleet of 20 vehicles, a mid-range telematics deployment can cost €3,600–€9,600 per year in subscription fees alone, before factoring in hardware procurement, installation downtime, and ongoing maintenance of the devices themselves.

What Are the Real Benefits of Telematics on Cars?

The business case for telematics on cars rests on measurable operational improvements. Industry benchmarks consistently point to the following outcomes when telematics data is actively used — not just collected:

• Fuel savings of 10–20% through identifying excessive idling, aggressive acceleration, and inefficient routing. A 15-vehicle diesel fleet averaging 30,000 km/year per vehicle could save €4,500–€9,000 annually at current EU diesel prices.
• Maintenance cost reductions of 10–15% by catching diagnostic fault codes early and scheduling preventive maintenance before breakdowns occur.
• Driver behaviour improvement: Studies from fleet operators across Europe report a 20–30% reduction in harsh braking events within 90 days of deploying driver scoring tools.
• Insurance premium reductions of 5–15% where insurers offer usage-based insurance (UBI) programmes tied to telematics data.

These figures assume consistent data review and management action. Telematics data sitting unreviewed in a dashboard delivers none of these gains.

Is Hardware Always Required for Fleet Telematics?

No — and this distinction matters increasingly for SME fleets. There is a growing category of fleet management software that delivers significant operational control without any onboard telematics hardware. These platforms manage vehicle documents, maintenance schedules, driver assignments, expense reporting, and compliance workflows entirely through cloud software and driver mobile apps.

No-hardware fleet software (for example, Movcar) lets fleet managers start managing their fleet within minutes, without installing telematics devices or negotiating hardware contracts. Movcar’s automated document expiry reminders — triggered at 30, 14, and 7 days before deadlines — handle a problem that hardware telematics systems don’t address at all: keeping insurance certificates, technical inspections, and driver licences current across the whole fleet.

For fleets where the primary pain points are administrative overhead, document compliance, and maintenance scheduling rather than real-time vehicle data, hardware-free fleet software often delivers faster ROI. Movcar’s pricing ranges from €0.40 to €2.00 per vehicle per month on annual billing — a fraction of the cost of hardware-based telematics subscriptions.

The two approaches are not mutually exclusive. Many mid-market fleets run a telematics provider for vehicle data alongside a fleet management platform for document and maintenance workflows.

What Fleet Managers Should Evaluate Before Deploying Telematics

Before committing to telematics hardware across a fleet, fleet managers should work through these five questions:

1. What specific problem are you solving? Fuel waste, driver behaviour, route efficiency, maintenance visibility, and document compliance each point to different tool categories. Telematics on cars excels at the first three; software platforms handle the last two more efficiently.
2. What is the vehicle mix? OBD-II plug-in devices work on most post-2001 vehicles but may not be compatible with older commercial vehicles, specialist plant, or electric vehicles with non-standard diagnostic ports.
3. Who will act on the data? A telematics system with no dedicated analyst or process for reviewing alerts provides limited value. Organisations without bandwidth to review dashboards weekly rarely recoup hardware costs within 24 months.
4. What is the total 3-year cost? Include hardware, installation, subscription, replacements (device failure rates average 5–8% per year), and staff time. Compare this against the projected savings from the specific use case.
5. What are the GDPR implications? Telematics data collected on EU roads is personal data under GDPR where it can identify an individual driver. Fleet managers must document a lawful basis for processing, notify drivers, and ensure data is stored on EU-based infrastructure.

Telematics on Cars vs. Fleet Management Software: Choosing the Right Fit

The table below summarises where each approach delivers value for fleet managers:

For deeper context on how fleet software fits into the broader vehicle management picture, see Vehicle Fleet Software: What It Does and Why It Matters and Car Fleet Management: A Practical Guide for Fleet Managers. If your evaluation includes telematics data as one component of a wider fleet strategy, the article on Telematics for Cars: What Fleet Managers Need to Know provides additional technical context on hardware selection and integration.

Telematics on cars is a mature, well-proven technology that delivers measurable returns — but only when the right problem is matched to the right tool. Fleet managers who identify their core operational pain points first, then select tools accordingly, consistently outperform those who deploy technology speculatively. Whether that leads to a telematics hardware deployment, a no-hardware fleet management platform, or a combination of both depends on the specific needs of the fleet — not on vendor marketing.