An accrual leave code calculates based upon hours worked on selected pay code(s).  The system will always calculate leave accruals if a selected pay code is processed through payroll for the employee.  The accrual calculation is designed to give an employee a certain number of hours for every one hour worked.  However, Comprehensive Leave Manager does allow flexibility in the set up to enable you to always calculate a certain number of hours regardless of the hours worked on the pay code.  

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A lump sum leave code gives an employee a specified amount on a specified date.  Once a lump sum has processed for a specific date, it would not reprocess for the same date.  The system waits until the next posting date to process and give the employee more available time.  Typically, a lump sum leave code is used when you want to give an employee a certain number of hours regardless of if they worked or how many hours they worked.

Lump sums are a great option for a yearly accrual.  For example, every year the company provides an employee 80 hours on their anniversary or on January 1.