No claim bonus for car driver

The insured driver is entitled for a no claim bonus(NCB) in the own damage section of the policy if no claim is made in the preceding years. Bonus amount varies depending on the number of years with a no claim
Preceding year 20%
Preceding two consecutive years 25%
Preceding 3 consecutive years 35%
Preceding 4 consecutive years 45%
Preceding 5 consecutive years 50%

No claim bonus only to be allowed if the policy is renewed within 90 days of the expiry of the previous policy, and encourages the vehicle owner to continue using a particular insurance company