📌 Introduction – Missed Advance Tax Deadline FY 2025-26? Here’s What You Must Know
If you have Missed Advance Tax Deadline FY 2025-26, you’re not alone. Thousands of taxpayers couldn’t pay their 2nd advance tax installment by 15th September 2025. The good news is you can still act fast to reduce interest, penalties, and ensure compliance. In this guide, IndiaFills explains 7 powerful steps to recover from the missed deadline, covering interest under Sections 234B and 234C, delayed payment process, penalty reduction, and planning for your next installment due in December.

1️⃣ Understand the 2nd Advance Tax Installment (Missed Advance Tax Deadline FY 2025-26)
- Due Date: 15th September 2025.
- By this date, at least 45% of your total estimated tax liability should have been paid.
- Applicable to all taxpayers whose estimated tax exceeds ₹10,000 in a financial year.
- Missing this payment triggers interest under Section 234C and possibly 234B.
(Official reference: Income Tax Department – Advance Tax ✅)
2️⃣ What Happens When You Miss the Deadline – Interest under Sections 234B & 234C
If you’ve Missed Advance Tax Deadline FY 2025-26, two types of interest may apply:
- Section 234C: Interest for deferment or non-payment of installments (1% per month or part of a month).
- Section 234B: Interest for default in payment of Advance Tax (1% per month from April till actual payment).
Example: If your unpaid tax for the 2nd installment is ₹50,000 and you delay by one month, interest under 234C = ₹500. Pay sooner to limit this.
(Official Resource: Understanding Sections 234B & 234C)
3️⃣ How to Pay Delayed Advance Tax Now (Step-by-Step)
You can still pay your missed installment online:
- Go to the Income Tax e-Filing Portal ✅
- Select ‘Challan No./ITNS 280’.
- Choose ‘Advance Tax’ under tax type.
- Enter your PAN, assessment year, bank details.
- Pay the shortfall immediately.
- Save the challan receipt for your records and future ITR filing.
Paying now stops additional interest accumulation.
4️⃣ Tips to Reduce or Avoid Penalties (Missed Advance Tax Deadline FY 2025-26)
- Pay Immediately: Even a single day’s delay adds interest.
- Revise Income Estimate: Adjust your next installment (due 15th December 2025) to cover shortfall.
- Keep a Tax Calendar: Mark deadlines to stay compliant.
- Use IndiaFills Reminders: We send you proactive alerts.
5️⃣ Plan for the Next Installment (Due 15th December 2025)
Your third installment requires you to have paid 75% of your estimated tax liability. If your income has increased mid-year, recalculate and pay more in December to avoid penalties.
6️⃣ Internal Links to Related Posts by IndiaFills
- Belated ITR Filing FY 2024-25 – File Now to Avoid Higher Penalties
- Advance Tax FY 2025-26 Tips by IndiaFills
These resources help you understand other important compliance topics.
7️⃣ How IndiaFills Can Help You with Missed Advance Tax Deadline FY 2025-26
At IndiaFills, our experts calculate your advance tax, remind you of deadlines, and handle penalty minimisation. Whether you’ve Missed Advance Tax Deadline FY 2025-26 or want proactive tax planning for December’s installment, we’ve got you covered.
📩 Contact us today at indiafills@gmail.com to stay stress-free and compliant.

Conclusion – Act Now & Avoid Bigger Penalties
Missing the 2nd Advance Tax installment for FY 2025-26 doesn’t have to turn into a financial setback. The key is speed and planning. As soon as you realise you’ve Missed Advance Tax Deadline FY 2025-26, pay the shortfall immediately to reduce the compounding effect of interest under Sections 234B and 234C. Then, reassess your income projections for the rest of the year and make sure your next installment (due 15th December 2025) covers any deficit.
