The offer letter should make clear which forms of incentive compensation will be assessed and awarded in the company's sole discretion. Signed an offer letter for a new job with annualized salary.The offer letter should provide details on the salary and pay periods. What is the salary for this role and how often are employees paid? Be sure to outline these details in your offer letter. What should an offer letter include? 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. Tell him that your current pay is not commensurate with your contributions. You'd like to have your compensation reviewed.