In this article, we discuss how to write a bonus request letter and provide an example letter for you to use as a reference. You can employ a bonus letter template to formally recognize and reward an employee's outstanding performance or the achievement of specific, measurable goals.The Wage Tax must be filed quarterly and paid on a schedule that corresponds with how much money is withheld from employees' paychecks. Please attach letter from employer using only the template provided at phila. What is a Bonus Plan? A bonus plan is an agreement between the employer and employee to pay out a predetermined amount of money based on performance. Bonuses are considered paid when received so it must be included in the employee's income. A prize awarded to a participant in a game or "reality" show is considered non-employee compensation for Pennsylvania personal income tax purposes. An incentive bonus agreement is a contract between an employer and employee that details information about a cash bonus offered as an incentive. Authorized sick leave with pay will be granted to an employee for absence from duty because of: 1.