He will get interest on Income Tax refund for 5 months from June 2018 to October 2018. If there is refund of excess Self Assessment Tax paid, then interest will be calculated at the rate of 1.5% per month or part of month from the date of filing of Income Tax return or payment of tax, whichever is later till the date of grant of refund.įor example, Mr.D filed paid Self Assessment Tax on and filed his Income Tax return on.