Employers generally have broad discretion to manage their workforce, including setting pay rates. Unless you are covered under an employment contract or collective bargaining agreement, your employer could lawfully promise a pay raise in the future and then change its mind later. California law may provide angle for your to pursue, and perhaps one of the fine California attorneys on this site will weigh in. Good luck.
My answers to questions posted on AVVO are intended to provide general information only, and are not intended to be legal advice. Employment law issues typically require a careful case-by-case analysis. Consequently, if you feel that you need legal advice, I would encourage you to consult in person with an employment attorney in your area.
If you are an at will employee (no contract, no union) then you can be fired at any time for any reason. Similarly, you can be suspended or have your salary reduced.
The statement that you attribute to your boss about a promotion/raise does not constitute an enforceable contract or promise.
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