Suppose I have an insurance policy (specifically: for house contents), and suffer a loss that is covered by the policy. If I make a claim, I get money now, but the insurance company will probably increase my annual payment later. So, if the loss is relatively small, and I can easily pay it myself, it may be better to avoid making a claim, in order to avoid the increased costs. But in order to decide, I have to know how much higher the annual payment would be. I did not find this information anywhere in the policy.
Is there a rule of thumb for estimating the increase in payments due to a claim?
EDIT: I have just noticed that the insurance company have added to my policy, for free, a cover for replacing the keys to my house, in case of loss or theft. Of course, the price of replacing the keys is quite small, and I do not really need this coverage, but it is a standard part of their policy and it is free. This emphasizes the question, whether should I make such a claim?