Will I be billed more if I add more employees?

Yes. Whenever you add employees, they are reflected in your bill the following month. For annual contracts, you are billed the total prorated amount based on the number of months remaining on your contract. The billing is based off when the employee has completed onboarding.  For example, if an employee completes onboarding  in March for an April hire date, the company will be billed at the beginning of April, not May.