Compensation Subsection: Enter the salary amount being offered to the employee. The salary may be entered as an annual, monthly or hourly basis.Offer letters must be prepared to preserve at-will employment status unless the employer consciously decides otherwise. See Preserving At-Will Status. Need help drafting a job offer letter? What Should Be in a Job Offer Letter? I work for a university in Michigan. This appointment is effective on _____ at an annual (12 month) salary rate of ______. What Should Be in a Job Offer Letter? No; not in the United States.