An offer letter mainly consists of the salary, company policy, notice period, contract if any, and other important details. Basically you're expected to accept an offer and join the work without having any written proof of appointment and confirmed agreement on your payout.Over two weeks later and 3 days into training, HR tells me they "accidentally" offered me the role with a salary and it would need to be changed to hourly. No. Understanding U.S. Job Offer Components: Financial components such as salary, taxes, benefits, insurance, retirement, and more. Customer: My employer sent me an offer letter. I accepted and filled out all the hiring docs. An offer letter typically shows the general terms of employment – pay, benefits, perhaps a bonus or commission plan, and a start date.