When the fleet premium starts to pinch, raising the deductible is one of the first things that comes to mind – and done well, it's not a quick fix but a deliberate change of structure. What makes the difference is doing the maths: what the company takes on, and what it gets in return. This article walks through how to weigh it up.
- A higher deductible typically brings a lower casco premium – in exchange, the company carries more of the cost when a claim happens.
- The side effect is often the main effect: small claims drop out of the reporting cycle, and the record gets cleaner.
- You need to do the maths: claims frequency times average claim size, weighed against the premium difference and your reserves.
- For financed vehicles, the finance provider's deductible requirements can be a constraint – the finance agreement governs.
What does it give, and what does it ask?
At its core, raising the deductible is a trade: the company takes on a larger share of the lower band of claims, and in return the insurer typically asks for a lower premium. The value of that trade depends on the fleet's claims pattern: for infrequent claims, the savings will likely outweigh the risk taken on; but for fleets with frequent small claims, the higher deductible “bites” on many of them – and that's where the maths decides. The starting point is always the claims record: without claims frequency and average claim size, a deductible decision is just a guess.
The effect on your claims record
A secondary – often primary – benefit of raising the deductible is that small claims drop out of the reporting cycle: whatever the company settles itself, below the deductible, doesn't weigh on the loss ratio. That makes it one of the best remedies for a worsening claims history: the record gets cleaner, while the real, large risk stays covered. The precondition is a working internal small-claims budget and house rule – as the dilemma article describes.
The shape of the calculation
On paper it's simple: take the number and value of claims near the deductible band from recent years' claims lists, and weigh it against the premium difference shown in the quotes. If the expected value of the claims you'd be taking on is meaningfully smaller than the premium saving, raising the deductible makes sense; if it's larger, look for the premium reduction elsewhere – in structure, or in competitive quoting. And there's a third number: the company's reserves. The deductible is only a useful tool if the money is actually there when a claim happens – otherwise the saving turns into a liquidity problem.
Limits and pitfalls
For financed vehicles, the finance provider typically sets a deductible ceiling – there, the finance agreement governs, and the increase has a limit. A flat, one-size-fits-all increase is another pitfall: the same level doesn't make sense for every category – a delivery vehicle and a company car have different claims patterns, as the cover-levels article shows. Finally: raising the deductible also calls for communication with drivers – if the rule on passing on the deductible changes too, that needs to be settled in writing, in advance.
Driver communication: the missing link
Raising the deductible is a technical decision – but it has a human side that's often left out: informing drivers. Passing the deductible on to drivers isn't an internal rule you're free to design as you like: an employee's liability for damages is governed by the framework of labour law – fault, a cap on the amount for ordinary negligence, and limits on deductions from wages. Advance, written notice is a basic requirement within that framework, but it isn't enough on its own – setting the rule up calls for an employment lawyer. Good practice is to communicate the increase together with the claims-prevention message: not a punishment, but a change of structure whose benefit – a lower premium, a cleaner record – is shared. Involving a lawyer and an accountant is recommended for the details; I'm happy to help draft the communication on request.
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