Tax deduction at source on business perquisites requires payer to deduct tax before providing perquisites, with limited exemptions. Section 194R requires deduction of tax at source by any person providing a resident with a benefit or perquisite arising from business or profession, at the rate of ten per cent of the value or aggregate value; where benefits are wholly in kind or partly in cash with insufficient cash to meet tax, the provider must ensure tax is paid before release. The section exempts small aggregate benefits for a resident and exempts individuals or HUFs below specified turnover/receipt thresholds, and empowers the Board to issue binding guidelines to resolve difficulties.