Deferred visa application for dependents

Most likely the answer to this question is contained somewhere in the guides, but remained not entirely clear to me.

Is it possible to go through the application process for me alone, and after a few months after the approval go through the application process for my dependents? Will such a separate visa application incur any additional costs?

Thank you for your help.

They can apply later. However, they will only get the number of months or years left on your visa.