Advance Tax (Q4) Due Date — Filing Calendar 2026-27
Due Date
15th March each year
What is Advance Tax (Q4)?
Advance Tax Q4 is the final installment of advance income tax, due by 15th March. By this date, the total advance tax paid must equal 100% of the estimated annual tax liability. This is the critical deadline as it determines whether Section 234B interest (for paying less than 90% of assessed tax) applies.
Who files it?
All taxpayers with estimated annual tax liability of ₹10,000 or more. By 15th March, 100% of the estimated tax must have been paid in total across all four installments.
Late Fee & Penalty
Interest under Section 234B: 1% per month from 1st April if total advance tax paid is less than 90% of assessed tax. Interest under Section 234C: 1% per month for 1 month on shortfall below 100% as of 15th March.
Frequently Asked Questions — Advance Tax (Q4)
What is the due date for Advance Tax Q4 (FY 2026-27)?
The due date for Advance Tax Q4 is 15th March 2027. By this date, 100% of the estimated annual tax liability must have been paid.
What is Section 234B interest and how does it differ from 234C?
Section 234C interest applies when quarterly installments fall short of the required percentages. Section 234B interest applies when total advance tax paid is less than 90% of the final assessed tax — it runs from 1st April till the date of self-assessment payment.
Can I pay remaining tax after 15th March?
Yes, but as self-assessment tax at the time of filing ITR. Interest under Sections 234B and 234C will apply on the shortfall. It is advisable to pay any remaining amount before 31st March to limit interest.
What is the advance tax schedule for presumptive taxpayers?
Taxpayers under Sections 44AD/44ADA can pay their entire advance tax liability in one shot by 15th March, instead of the quarterly installment schedule. However, 100% must be paid by 15th March.
Related Deadlines
Advance Tax (Q1)
Advance Tax Q1 due date is 15th June. Pay 15% of estimated annual tax liability by 15th June to avoid interest under Section 234C for FY 2026-27.
Advance Tax (Q2)
Advance Tax Q2 due date is 15th September. Pay cumulative 45% of estimated tax by 15th September to avoid Section 234C interest for FY 2026-27.
Advance Tax (Q3)
Advance Tax Q3 due date is 15th December. Pay cumulative 75% of estimated tax by 15th December to avoid Section 234C interest for FY 2026-27.
Income Tax Return
ITR due date for non-audit cases is 31st July 2026. Income tax return filing deadline, late fees under 234F, and interest for FY 2025-26.