when does adwords bill me

Im on 50usd a month with a new adwords campaign. a lil confused will it bill me right when someone clicks, or when it reaches 50 dollars

 

They bill total spend amount at month end to your credit card.

 

It bills you the second you deposit money.

After you deposit you simply have the "chips" to spend on Adwords...

If the funds in your account are low, your campaign will stop running. Adwords won't bill you another $50 automatically, you'll have to deposit once more $50 (or make it $150 so it will run 3 days)

 

This is only if you're using pre-pay, most people use post pay.