An excess is the amount you generally pay towards an approved claim, so choose one you could comfortably afford if something goes wrong. A higher voluntary excess may reduce your premium, but the saving should be weighed against the extra out-of-pocket cost when claiming. Check whether your policy has different excesses for events such as storms, theft, young drivers or unlisted drivers, and ask the insurer how they apply. Compare the total premium and excess together, and review them when renewing or changing your cover. Your insurer can explain the available options and any limits in your policy.