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Section 234A / 234B / 234C Interest Calculator
Calculate interest on late ITR filing (234A), advance tax shortfall (234B), and instalment deferment (234C) for FY 2026-27. Exact formula per Income Tax Act.
Section 234A — Interest for late filing of ITR. Applies if return is filed after the due date (31 July for individuals). Rate: 1% per month on the tax payable (after TDS/advance tax). Partial month counts as full month.
Section 234B — Interest for default in payment of advance tax. Applies if advance tax paid is less than 90% of assessed tax. Rate: 1% per month from 1 April to date of assessment/actual payment.
Section 234C — Interest for deferment of advance tax instalments. Rate: 1% per month for 3 months on shortfall of each instalment (1 month for 4th instalment).