What happens if my ctr surpasses my budget?

Hi, can somebody please explain to me what happens if my advertising campaign yields me more clicks which is worth more than my set budget?
For example if I launch a campaign with a keyword worth .10 and I set my budget to $30… My ctr was successfully high and I ended up with $100 worth of click… Do I have to pay the difference before I can start a new campaign?
Thanks in advance,
-DigiP

Original post by digip