Want to know how to make your employees feel valued? Select a bonus letter example that truly speaks to them with our template and guide.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. I'm pleased to present you with this Employment Bonus Letter. You have demonstrated high proficiency in your work and have exceeded expectations consistently. How to Request a Sign-On Bonus. In certain cases, companies offer sign-on bonuses, also called signing bonuses, to employees who join the organization. Dear {{ employee_first_name }},.