Salary includes remuneration received for personal services under a contract of employment. For income to be categorized as salary, there must be an employer-employee relationship. Salary is taxable on a due or receipt basis, whichever is earlier. Components of taxable salary include basic salary, bonuses, commissions, allowances, perquisites, and profits in lieu of salary. Certain allowances such as transport, house rent, and leave travel are partially or fully tax exempt. Perquisites include benefits provided by employers and are taxed as salary. Specified employees who are directors, substantial interest holders, or high salary earners face additional taxes on perquisites.