NCB stands for "No Claim Bonus" in insurance. It is a discount given by the insurance company to the policyholder for not making any claims during the policy period. The NCB is given as a percentage of the premium and can be availed at the time of policy renewal. The percentage of NCB increases with each claim-free year and can go up to 50% after five consecutive claim-free years. NCB is applicable to all types of insurance policies, including car insurance, bike insurance, health insurance, and others.