A performance bonus is a monetary reward given to employees beyond their regular salary, contingent upon achieving certain predetermined goals or benchmarks. You can employ a bonus letter template to formally recognize and reward an employee's outstanding performance or the achievement of specific, measurable goals.Download this Annual Company Bonus Letter that helps you complete all the formalities and add details of the deserving candidate to ease this process. 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. An incentive bonus agreement is a contract between an employer and employee that details information about a cash bonus offered as an incentive. How to fill out the SimplyMerit Sample Merit and Bonus Adjustment Letters? 1. Locate the specified placeholders within the template. 2. Here are the key components you need in a retention bonus agreement: 1. Duration: Clearly define how long the agreement is valid. 2.