Although there are some exceptions to the minimum wage laws, unless you are one of the exceptions, your employer is legally obligated to pay you at least the federal minimum wage or the minimum wage that is mandated by a state. This amount is determined by whichever wage amount is higher. If you qualify for minimum wage, but find that your employer is paying you less than the legally-mandated amount, by law you can file a lawsuit or make a wage claim against your employer.
Interestingly, employers sometimes try to find ways to get around paying minimum wage. It is important to realize that in most cases, an employer cannot use tips to reduce minimum wage, nor can they decrease the amount you are paid to cover the cost of your uniform or to maintain it. There is one exception to this though. An employee can agree in writing that an employer can reduce the amount of minimum wage paid if the employee is provided meals and lodging.