Your no-claims bonus
If nothing goes through your own policy, your no-claims bonus is not affected. The non-fault claim never enters your insurer’s records as a claim against your policy as it is a third-party claim made against another insurer. Your bonus remains intact.
Your excess
Your excess is not triggered. Excess applies when you make a claim on your own policy. In a non-fault accident handled through the at-fault driver’s insurer, you are not making a claim on your policy, so excess has no role.
Your renewal premium
This is where the answer becomes less clear. Insurers can ask at renewal whether you have been involved in any accidents in the past five years, regardless of who was at fault. If you have been, they may price your renewal differently.
The logic is that involvement in accidents, even as the innocent party, is a statistical signal that some insurers price for. This is a commercial decision, not a penalty, but the practical effect on your premium can be the same. It varies significantly between insurers.
What you must disclose
You are legally required to answer renewal questions accurately. If your insurer asks whether you have been involved in any accidents in the past five years, a non-fault accident must be disclosed. Failing to disclose it is misrepresentation and can invalidate your policy.
Switching insurers
If your current insurer increases your premium following a non-fault accident, other insurers will also ask about it. The impact varies considerably between providers. Shop around as some insurers treat non-fault accident history very differently from others.