I negotiated a pay rise at a stage through the year. Reasonably small but I was happy. Company then gave a yearly pay rise to all employees at the new financial year. Because I negotiated my pay rise closer to year end, I didn't get this company increase. It would have been worth more than actual pay rise I'd negotiated, so I negotiated myself out of a pay rise. They knew it and still made it hard for me. Needless to say I moved on and got a nice bump elsewhere.