Overtime pay is at least “time and a half.” This means your regular pay plus another half of your regular pay rate. If you make $20 an hour, any hours your work over 40 in a week is paid at $30 an hour, or time and a half. Overtime can be more than time and a half. It depends on the employer.
In general, your overtime rate must be based on all of the kinds of payments you get, not just your hourly rate. For example, commissions, pay adjusted off regular hour shifts, and most bonuses must be included in your overtime rate.