The insurer typically knows the model's standard equipment – it's worth itemizing both factory-fitted optional extras and aftermarket accessories, both at signing and afterwards; not doing so can lead to underinsurance and a proportionally reduced payout. A smart set of alloy wheels, a quality sound system, a wrap or a tow bar are all worth something: if undeclared, they typically aren't covered at claim time, or only after a dispute. This article is about one of the most rewarding five minutes in casco.
- The basic principle: cover applies to the condition recorded in the policy – an aftermarket extra left undeclared is risky ground.
- The typical items to declare: alloy wheels, audio/multimedia systems, wrapping, a tow bar, roof box carriers, security devices, and custom parts.
- The tools for declaring them: a list + invoices + photos – the same package also strengthens your case on value at total-loss time.
Why is this even a question?
The premium and the cover both follow the car's value and risk – and extras move both: they add value (a higher possible claim), and some also change the risk picture. Policies therefore typically state that undeclared accessories aren't covered, or are covered only to a limited extent. An undeclared extra is therefore not a "free bonus of cover" but a grey zone – and it shows up right where a dispute is least welcome, at claim time.
What's worth declaring – and how?
The practical list: alloy wheel sets (beyond the factory-standard ones), a sound system and multimedia, wrapping and decals, a tow bar, a roof box and carrier system, aftermarket driver-assistance or security devices (alarm, tracker – these can also count favourably on the theft side), and custom interior parts. The process: a written declaration to the insurer (I handle this through the broker channel), an invoice or proof of value, and photos. Keep the confirmation together with your policy documents – this can also be tracked as part of our data checklist.
The side benefit: a stronger position at total-loss time
Documenting extras doesn't just protect a partial-claim payout: at total-loss time, equipment is a genuine factor in determining the market value at the time of loss. Extras that are declared and backed by an invoice and photos are the best foundation for arguing for a realistic value – without that, the claim "it's a well-equipped car" remains just a claim when a loss happens. Five minutes of admin today buys a stronger negotiating position on your worst day.
Added any extras to your car in recent years? Let's review what needs declaring. book a free 20-minute consultation →
