Your no claims bonus is one of the most valuable ways to reduce your car insurance premium. After five or more years of claim-free driving, it can cut your costs by up to 60%. Losing it after a single accident can add hundreds of pounds to your renewal. No claims bonus protection is an optional add-on that aims to prevent this, but it does not work quite the way many people expect. This guide explains what NCB protection does, what it does not do, and whether it is worth paying for.
A no claims bonus (also called a no claims discount or NCD) is a discount on your car insurance premium that you earn for each year you drive without making a fault claim. The longer you go without claiming, the bigger the discount becomes.
| Years claim-free | Typical discount (ABI) |
|---|---|
| 1 year | Around 30% |
| 2 years | Around 40% |
| 3 years | Around 50% |
| 4 years | Around 55% |
| 5+ years | Up to 60% |
Most UK insurers cap the maximum discount at somewhere between 5 and 9 years. After reaching the cap, you maintain that level indefinitely by remaining claim-free. Your NCB belongs to you, not your insurer or your car, and you can take it with you when you switch providers.
The savings are significant. With the average UK car insurance premium at £560 (ABI, Q1 2026), a 60% no claims discount could reduce your annual cost by over £330. For younger drivers whose base premiums are higher, the savings from a strong NCB are even more substantial.
This is why your no claims bonus is often described as one of the most valuable assets you can build as a driver. Losing it after a single accident can undo years of careful driving.
No claims bonus protection is an optional add-on to your car insurance policy that allows you to make a limited number of claims - usually one or two within a three to five year period - without losing the discount you have built up.
Most insurers only offer protection once you have at least four years of no claims built up. The cost varies by insurer, your car, and your driving history, so it is worth comparing quotes with and without protection to see the actual price difference.
This is the most important thing to understand about NCB protection: it preserves your discount percentage, but it does not freeze your overall premium.
If you make a claim, even with NCB protection, your insurer can still increase your base premium because you have demonstrated higher risk. You will still pay your excess on any claim, and your claims history will still show on insurance databases. The protection only ensures your discount percentage stays the same.
So instead of losing your 60% discount entirely after a claim, you keep it, meaning your premium increase is less severe than it would otherwise be. But your premium can still go up - the increase just applies to the discounted amount rather than starting from scratch.
Without protection, making a fault claim will reduce your no claims bonus. Most insurers apply a "step-back" system rather than wiping your bonus entirely.
The most common approach is a two-year step-back for a single claim. If you have five years of no claims and make one fault claim, you would typically drop to three years. Make a second claim in the same period and you could lose your bonus entirely.
The financial impact builds up over time. Dropping from a 60% discount to a 40% discount means paying more at every renewal until you rebuild the lost years, which takes time even if you drive perfectly from that point on.
Not every claim affects your no claims bonus. The key distinction is between fault and non-fault claims.
| Claim type | What it means | Effect on your NCB |
|---|---|---|
| Fault claim | Your insurer pays out and cannot recover the costs from another party | Typically reduces your NCB by two years (step-back) |
| Non-fault claim | Another driver's insurer accepts full liability and covers all costs | Your NCB should remain intact |
| Windscreen claim | Repair or replacement under comprehensive cover | Usually excluded from NCB calculations |
| Lock replacement claim | Replacement locks under comprehensive cover | Usually excluded from NCB calculations |
Some claims can start as "fault" but be reclassified as "non-fault" once liability is settled - which can take months. If your NCB is reduced during this period, it should be restored once the claim is settled in your favour. Always check your specific policy terms, as individual insurers may handle these situations differently.
Whether protection makes financial sense depends on your personal circumstances.
| Protection is likely worth it if | You might skip protection if |
|---|---|
| You have five or more years of no claims built up | You only have one or two years of no claims |
| You drive frequently or cover high annual mileage | You drive very low mileage or rarely use your car |
| You regularly drive in busy urban areas where minor accidents are more common | You are a very experienced driver in a low-risk area |
| The protection cost is small relative to what you would lose | The protection cost is high relative to your potential savings |
| You would struggle to rebuild your bonus quickly | You have savings to absorb a temporary premium increase |
When comparing car insurance, get quotes both with and without NCB protection. The price difference tells you exactly what the protection costs for your situation. If the gap is small and you have a strong bonus to protect, it is usually worth adding. Compare car insurance via Brumble to see quotes from 130+ insurers with and without protection.
Your no claims bonus belongs to you and can be transferred between insurers when you switch. To transfer it, you will need proof from your previous insurer, usually found on your renewal documents or cancellation letter. Most new insurers give you 7 to 28 days from the start of your policy to provide this proof.
There are some important rules to keep in mind. Your NCB can only be used on one vehicle at a time. If you have a gap of more than two years without insurance, most insurers will not honour your old NCB. NCB protection does not automatically transfer - you need to purchase it again with your new insurer. Different insurers have different maximum NCB caps, so check what your new provider accepts.
If you are taking a break from driving, our guide on keeping your no claims bonus without a car explains your options.
Traditionally, only the main policyholder earns a no claims bonus. If you are listed as a named driver on someone else's policy, you do not build up your own NCB.
However, some insurers now offer a "named driver no claims bonus" that allows named drivers to build up evidence of claim-free driving they can use when they take out their own policy. It is worth asking about this if you are adding a family member to your policy, particularly for young drivers who will eventually need their own cover.
Listing someone else as the main driver to benefit from their NCB when you actually drive the car most is called fronting and is insurance fraud. Your claim will be rejected, your policy voided, and you could face prosecution.
Most insurers require at least four years of no claims before offering protection. Some may offer it from three years. The more years you have, the more valuable the protection becomes because there is a bigger discount at stake.
No. NCB protection preserves your discount percentage, but your insurer can still increase your base premium after a claim because you have demonstrated higher risk. The increase is typically less severe than it would be without protection, because your discount stays intact rather than being reduced.
Yes. Your NCB belongs to you and you can take it to any insurer. You will need to provide proof, usually from your renewal documents or cancellation letter. Most insurers give you 7 to 28 days to provide this proof after starting a new policy. NCB protection does not transfer automatically - you need to buy it again.
Most insurers will honour your NCB if you have a gap of up to two years without insurance. After two years, you will usually need to start building your bonus from scratch. If you are taking a break from driving, our keeping your NCB without a car guide explains your options.
It should not. If the other driver's insurer accepts full liability and covers all costs, your NCB should remain intact. However, claims can take time to settle, and your insurer may initially record it as a fault claim until liability is confirmed. Always check with your insurer if you are unsure.
Not usually. Only the main policyholder earns a standard NCB. However, some insurers now offer a "named driver no claims bonus" that lets named drivers build proof of claim-free driving they can use when they take out their own policy. Ask your insurer if this is available.
No. Your NCB can only be applied to one vehicle at a time. If you insure two cars, you will need to build a separate no claims bonus on the second policy. Some multi-car policies may handle this differently, so check with your insurer.
Windscreen repairs and replacements are typically excluded from NCB calculations on comprehensive policies. This means a windscreen claim should not affect your no claims discount. The same usually applies to lock replacement claims. Always check your specific policy terms to be sure.
Association of British Insurers - No claims bonuses and discounts
Association of British Insurers - Motor Insurance Premium Tracker, Q1 2026
Financial Conduct Authority - Insurance product information and consumer guidance
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