Looking for job offer letter samples? Explore 10 free job offer letter templates suitable for various hiring situations.The offer letter also can reference the annualized salary rate. What is included in an offer letter? How do I ask what the salary would be for a job offer? A counter offer letter is a physical letter or email candidates send to an employer when they want to negotiate the terms of a job offer given to them. An offer letter provides crucial details about the role, including salary, benefits, and start date, setting the foundation for the employment relationship. Offer letters include essential employment details, such as a job title, start date, and compensation details. While counteroffering the salary, you'll want to show the reasoning behind why you chose a specific amount.