What is the Tax Rate applicable on the Buyback of shares?
Under Section 115QA of the Income Tax Act, the company is liable to pay tax at a flat rate of 23.296% [Rate of tax – 20% (plus surcharge @ 12% plus Health and education cess @ 4%) of distributed income.
As correctly mentioned by @Chirag1 and @neha1101, the tax on buy back of shares has to be paid by the companies. To avoid double taxation in the hands of companies as well as shareholders, the buy back proceeds are exempt in the hands of shareholders.