What should I include in a salary negotiation letter?

When writing a salary negotiation letter, it is important to be very direct and to the point. You want to be pleasant, but at the same time, you want to let the employer know that you want a particular salary. Include the original amount of money that was offered to you and then include a counter offer. After that, you should include any facts or figures that support your case as to why you should have a higher salary than what the employer offered you. You should also address any other items that need to be negotiated, such as benefits packages.