March 2026 is the most crucial month of the financial calendar. With the year-end approaching, businesses, professionals, and individuals must stay vigilant about compliance deadlines under the Income Tax Act, Indirect Taxation (GST), and the Companies Act. Missing these dates can lead to penalties, interest charges, and loss of tax benefits.
💰 Indirect Taxation (GST)
| Date | Compliance | Details |
| 10 March | Filing | GSTR7 & GSTR 8 |
| 11 March | Filing | GSTR1 |
| 13 March | Filing | GSTR-1 IFF & GSTR-6 |
| 20 March | Filing | GSTR-3B & GSTR-5A |
| 25 March | Payment | PMT-06 for QRMP taxpayers |
| 28 March | Filing | GSTR-11 |
| 31 March | Renewal | LUT in Form RFD-11 and CMP-02 for composition scheme |
🧾 Income Tax Act
| Date | Compliance | Details |
| 2 March | Filing | GSTR7 & GSTR 8 |
| 7 March | Deposit | GSTR1 |
| 15 March | Payment | GSTR-1 IFF & GSTR-6 |
| 30 March | Filing | PMT-06 for QRMP taxpayers |
| 31 March | Filing | Filing of updated returns for FY 2024–25. Submission of Form 3CEAD and Form 67 (foreign tax credit). Last date for tax-saving investments (PPF, ELSS, NPS, SSY, etc.) |
🏢 Under Companies Act
| Date | Compliance | Details |
| 31 March | CSR | Mandatory CSR spending under Section 135 |
| 31 March | Corporate | Annual review of statutory registers and filings |
🏦 Key Personal Finance Deadlines
- 31 March is the absolute cut-off for tax-saving investments under Sections 80C, 80CCD, and 80D.
- Ensure contributions to PPF, NPS, ELSS, SSY, and life insurance premiums are completed.
- Record home loan repayments and capital gains investments for tax benefits.
✅ Action Checklist for March 2026
Here’s a quick tick-off list to help you stay compliant:
- [ ] Pay Advance Tax (15 March)
- [ ] Deposit PF & ESI contributions (15 March)
- [ ] File GST returns (10, 11, 13, 20, 25, 28 March)
- [ ] Renew GST LUT & Composition Scheme (31 March)
- [ ] Complete CSR spending (31 March)
- [ ] Make all tax-saving investments (31 March)
- [ ] File updated returns & foreign tax credit forms (31 March)
📍 Conclusion
March 2026 is packed with deadlines that mark the closure of FY 2025–26. Staying ahead ensures smooth compliance, avoids penalties, and secures tax benefits. Use this checklist to plan your month effectively and close the year with confidence.