How To Write A Letter Of Salary Increase To Employee . The salary increment letter format that an employee writes to his/her employer, asking for an increase in salary is given below. Dear [manager name] , i'm writing this letter with a wishful spirit. 50 Best Salary Increase Letters (How To Ask For A Raise?) ᐅ TemplateLab from templatelab.com The salary letter should have unique content with a clear format that is straight on point. Note that you should send this letter after asking for a raise from your manager.so, this email acts as a follow up to your previous communications. Then explain the letter’s general purpose which is to ask for an increase in.