Wages are the price paid to labour for its contribution to the process of production. A form of compensation paid to employees for work during a period of time, wages may be paid daily, weekly, fortnightly, monthly, per hour or per unit. The services rendered by the labourer include both physical and mental services, and wages are paid under contract by an employer to a worker for services rendered. Types of wages include piece wages, time wages, cash wages, wages in kind, and contract wages.