Missed an advance tax date or paid less? This calculator shows the interest under Section 425 (old 234C) for short instalments and Section 424 (old 234B) when less than 90% is paid by 31 March, for tax year 2026-27 under the Income-tax Act, 2025.
Advance Tax Interest Calculator
Tax year 2026-27, Sections 424 and 425 of the Income-tax Act, 2025 (old 234B and 234C)
Tax year 2026-27, Sections 424 and 425 of the Income-tax Act, 2025 (old 234B and 234C)
Tax on your total income for tax year 2026-27, less TDS, TCS and other credits.
Self-assessment tax, usually before filing the return.
Advance tax dates for tax year 2026-27
| Due date | Total to be paid by this date | Interest if short |
|---|---|---|
| 15 June 2026 | 15% (no interest if at least 12% paid) | 1% a month for 3 months |
| 15 September 2026 | 45% (no interest if at least 36% paid) | 1% a month for 3 months |
| 15 December 2026 | 75% | 1% a month for 3 months |
| 15 March 2027 | 100% | 1% for 1 month |
Advance tax applies when your tax after TDS and TCS is Rs 10,000 or more. Under the presumptive scheme (old Sections 44AD and 44ADA) the whole amount can be paid by 15 March 2027. Read more in our guide on advance tax due on 15 December 2026.
Received an income tax notice? Upload your notice for a free first check. You can also use our GST late fee calculator.
Law as on 14 November 2026. This is an estimate for planning. Your return and the tax department’s working decide the final figure.