To get paid on time at the end of the month, you will need to:
Earn at least $20 in the previous earnings period
Make sure you fill out your tax information
Have chosen your payment method preferences under payment settings
Failure to complete that can result in a postponed payment. Once that information has been filled out correctly, your payment should be sent out at the end of the month.
Payments typically go out any time between the 27th and 31st of the month.