What is the difference between a semi-monthly and bi-weekly pay frequency?

A semi-monthly pay frequency is pay dates that have specific dates of the month, such as the 15th and 30th. Semi-monthly pay frequency is 24 pay dates in a year. 

A bi-weekly pay frequency is on a consistent day of the week every two weeks, such as every two Fridays. A bi-weekly pay frequency is 26 pay dates in a year (two months in a year receive three paychecks). This matters so that we ensure we take payments out of your bank account at an appropriate frequency that coincides with your direct deposits.