Udemy pays instructors 30 days after the end of the month. For example, if a student purchases your course at any time in August, you will receive a payment within the first week of October. This delay allows all purchases to pass the 30 day refund period.
Payments are issued to instructors within the first 10 business days of the month. For more information on how to confirm payment status in your Revenue Report, please see our Support Center article here.
Feel free to let me know if you have any additional questions or concerns.