Here's a simple format for a salary increment letter, this format provides a clear and professional structure for requesting a salary increment. This article on salary increment letters explains the format of writing an appraisal letter.Learn to draft a compelling letter for increment in salary. Step-by-step instructions and samples to help you request a higher salary. Need to write a salary increase letter to an employee? Follow these step-by-step instructions to write your own, or steal one of our pre-made templates. Learn how to write a compelling salary increase letter to reward performing employees with our tips, checklist, and free templates. This article will guide you stepbystep through writing a salary increase letter. We also included two templates you can use immediately and five examples. • Approved a one-percent salary increase for employees effective January 2015.