Managing a fleet of heavy vehicles is a different business to operating a single truck. The complexity — multiple drivers, multiple vehicles, multiple contracts, multiple incident types — requires insurance that can keep pace. Fleet insurance is the solution, and understanding how it works can unlock both better coverage and meaningful cost savings.
What is fleet insurance?
Fleet insurance combines all your vehicles under a single policy with one renewal date, one premium calculation, one claims team, and one set of policy conditions. Instead of managing 15 separate vehicle policies with 15 different renewal dates, paperwork sets, and contacts, you have one.
For transport operators, the administrative simplification alone is significant. But the cost benefits, access to fleet risk management tools, and burning cost pricing are the additional advantages that become more valuable as the fleet grows.
Most specialist HGV underwriters set the fleet threshold at 3 or more vehicles. Some set it at 5. Below the threshold, vehicles are individually rated on schedule rates. Above it, you access fleet underwriting — which opens up burning cost pricing once you have sufficient claims history.
How fleet insurance is rated: burning cost explained
Unlike individual vehicle policies, which use fixed rate tables, fleet policies are typically rated on a burning cost basis. This is the most important concept in fleet insurance.
Burning cost formula: total claims paid over the rating period divided by total vehicle-years of exposure over the rating period. The result is your actual historical cost per vehicle-year, expressed as a dollar figure.
The insurer takes your burning cost, applies a loading for profit margin (typically 15–25%) and expenses (broker commission, administration), adds a risk loading for IBNR (incurred but not reported claims), and arrives at your annual premium per vehicle.
If your fleet has a strong safety record — few claims, low average severity — your burning cost is low, and your premium reflects that. If your claims experience is poor, burning cost rating means your premium reflects your own performance rather than an industry average.
This is fundamentally different from individual vehicle rating, which uses industry-wide data. Burning cost creates a direct financial incentive to invest in fleet safety — every dollar saved in claims reduces next year's premium.
The 5-year rating period and recent experience weighting
Insurers typically use a 5-year burning cost experience period. More recent years are given greater weight — year 5 (most recent) might carry 3x the weight of year 1 in the calculation. This means a catastrophic recent year can push your premium up sharply, even if your earlier years were clean.
A single $500,000 claim in year 4 of a 5-year experience period can increase fleet premiums by $30,000–$60,000 per year for several years until the experience smooths. This is why catastrophic claims management matters so much: getting the best possible outcome on a large claim (through active broker advocacy and claims management) has a long-term premium impact, not just an immediate claims impact.
It also explains why large claim incidents should trigger an immediate broker conversation — not just about the current claim, but about the premium implications at the next renewal and how to manage them.
Fleet Risk Management Assessment: how it works
The best specialist brokers — Rothbury, Gallagher NZ, and Marsh — offer Fleet Risk Management Assessment (FRMA) as part of their fleet programmes. This is a structured review of your risk management practices, typically conducted on-site by a broker specialist or specialist risk engineer.
The FRMA covers: driver selection and induction processes, how you screen drivers, what experience requirements apply, what training you provide and how it is documented; vehicle maintenance — your CoF compliance record, mechanical defect reporting system, maintenance intervals and record-keeping; load security practices — driver training in load restraint, equipment standards, chain-of-responsibility compliance; fatigue management — work time compliance systems, telematics use, logbook monitoring; and incident investigation — when an incident occurs, how you investigate it and what corrective actions follow.
The assessment produces a written report. Completing the recommended improvements — driver training upgrades, better maintenance documentation, telematics implementation — is typically recognised in premium terms at the following renewal. More importantly, the improvements reduce incident frequency, which flows into better burning cost data over subsequent years.
Ask your broker whether an FRMA is included in your fleet programme. If not, it is worth requesting one — the potential premium savings from demonstrating improved risk management are substantial.
Telematics and ADAS: the premium impact
Telematics systems — GPS tracking, driver behaviour monitoring (harsh braking, acceleration, cornering, speeding), hours-of-service monitoring, and vehicle diagnostics — have become standard in modern fleet management. For insurance purposes, telematics provides several benefits.
Evidence for claims resolution. GPS and acceleration data can reconstruct an incident, establishing vehicle speed, braking response, and position at the moment of impact. This helps determine fault and can significantly speed up claims resolution — and in disputed claims, it can prevent the other party's insurer from successfully attributing fault to your driver.
Premium reduction. Fleets with telematics systems that actively use the data to manage driver behaviour attract lower premiums — typically 5–15% lower than equivalent fleets without telematics. Demonstrating to an insurer that you monitor harsh braking events, generate driver behaviour reports, and follow up with driver coaching is evidence of a quality risk.
Advanced Driver Assistance Systems (ADAS). Modern trucks from Scania, Volvo, Mercedes, and DAF include ADAS features: automatic emergency braking (AEB), lane departure warning, fatigue monitoring, and blind spot detection. Underwriters are beginning to recognise ADAS-equipped vehicles with premium discounts, because the systems measurably reduce incident frequency. When renewing, confirm with your broker whether your vehicles' ADAS features are being recognised in the pricing.
Mid-term vehicle additions and fleet changes
Adding a vehicle to a fleet policy mid-term is straightforward. Notify your broker before the vehicle goes on the road: provide the chassis number, registration, make, model, year, agreed value, and intended use. The insurer will issue an endorsement adding the vehicle, and a pro-rata premium is charged for the remainder of the policy term.
Do not assume a new vehicle is automatically covered from the moment you take possession. While most fleet insurers provide a short grace period (24–72 hours) for established fleet clients, relying on this is risky. Call your broker before the vehicle operates.
Fleet excess structures
Fleet policies can use different excess structures for different vehicle types, driver categories, or incident types.
Standard excess — a fixed excess for all claims regardless of vehicle or driver.
Driver excess — an additional excess applies for inexperienced drivers (under 25, under 3 years' heavy vehicle experience). This creates a financial incentive to restrict inexperienced drivers to less-exposed roles, and it is the mechanism insurers use to manage the elevated claim frequency associated with young or inexperienced drivers.
Voluntary excess — operators can elect a higher voluntary excess in exchange for a premium reduction. For fleets with strong cash flow and good claims history, a higher voluntary excess can deliver meaningful premium savings. A fleet with $1M in annual premium can typically save $50,000–$100,000 by moving from a $1,000 excess to a $5,000 excess — if they can absorb the higher excess per claim.
What to include in a comprehensive fleet programme
A well-structured HGV fleet programme should include: comprehensive motor vehicle (agreed value, all vehicles); carriers liability (blanket limit covering all vehicles and all loads); public liability ($5M–$10M for specialist operations); employers and statutory liability; downtime/loss of use (daily benefit per vehicle); road clearing and reinstatement; and driver personal accident.
Some fleet programmes also include roadside assistance, legal expense cover, fleet management support services, and contract works cover as package inclusions. Confirm with your broker which extensions are included as standard and which require separate pricing.
The right programme is the one that reflects your actual operation — not a generic package. Review it actively at renewal with a specialist, and take advantage of the fleet risk management tools your broker provides.
Specialist in heavy vehicle insurance with extensive experience in commercial transport risk management. Connected with specialist HGV brokers across the country.
