Protected NCB - bintang
I have had protected no-claim bonus for years, assuming it to be a Good Thing but not actually paying much attention to it. I tend not to make claims - none for over 5 years -so do not put it to the test very much. Protection pushes up premiums, although the policy details do not say by how much, only that NCB is covered for only one claim per year. I wonder if, in any case, that claim would not result in an increased premium next period, explained perhaps as an age-related increase. Is NCB in fact worthwhile?
Protected NCB - daveyjp
It's like any insurance - you pay for it or you don't - from my experience it costs £20-30 more a year. I have never bothered. I've only ever had one claim which reduced my NCB by 2 years.

The year after I claimed current insurer wanted a large increase on the premium I had paid before the accident. Shopping around I secured cover for less than I paid before the accident and this with 2 years less NCB.