What are due dates and % of installments for Advance Tax?

The due dates and the percentage of installments of Advance Tax for assessees other than Companies are as below

In case of companies, there are 4 instalments of advance tax payable on or before 15th June (15%); 15th Sept. (45%); 15th Dec. (75%); & balance amount of Advance Tax payable by 15th March. Also, any amount paid by way of Advance Tax on or before the 31st March of that year, is treated as Advance Tax Paid during that Financial Year. The percentages of 45% and 75% specified with reference to dates of 15th Sept. and 15th Dec. include the amount of advance tax paid earlier during the year.

Source: Income Tax Department