How long does it take when you pay for membership to appear on your profile?

I have for a membership and it is not on my profile. For all you that have done bronze,gold or silver.How long does it take. I love this site and I want to show it. Please any advise will be welcome.

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.