1. The 31 March Imperative: Why Year-End Tax Planning Matters
31 March is the most consequential date in the Indian income tax calendar. Multiple tax benefits expire permanently at midnight on 31 March; certain deductions become irrevocable; and specific compliance actions that could have been taken become impossible. Unlike the ITR filing deadline (July/October), which only affects filing, 31 March actions actually determine the amount of tax you owe. Missing the March deadline on capital gains harvesting, MSME payments, or investment in qualifying instruments can mean paying lakhs in additional tax that could have been avoided with timely action. This comprehensive March checklist covers every major action item across both individual and business tax categories.
2. Capital Gains Harvesting: The Annual Rs 1.25 Lakh Opportunity
Section 112A provides Rs 1.25 lakh annual exemption on LTCG from listed equity shares and equity mutual funds. This exemption is "use it or lose it" -- if you have unrealised LTCG in equity portfolios that is less than Rs 1.25L, selling before 31 March and immediately repurchasing permanently shelters that gain from future tax:
- Strategy: review equity portfolio for positions held 12+ months with unrealised gains up to Rs 1.25L
- Sell those positions to crystallise the gain; pay zero tax (within the Rs 1.25L exemption)
- Immediately repurchase the same shares/units on 2 April (or next trading day after sale)
- Result: new cost basis = current market price; future appreciation from the new cost basis will be taxed, but the Rs 1.25L gain is permanently sheltered
- Do this for BOTH spouses independently: combined Rs 2.5L annual shelter
- Do this for BOTH old portfolio (if held from pre-Budget 2024 and grandfathered) and new portfolio
3. Capital Loss Harvesting
The complementary strategy: sell loss-making positions to book losses that can be set off against gains:
- Short-term capital losses (STCL): can be set off against BOTH STCG and LTCG
- Long-term capital losses (LTCL): can ONLY be set off against LTCG (not STCG)
- Carry forward: 8 assessment years for both STCL and LTCL
- Review all portfolio positions by 25 March; sell loss positions before 31 March to crystallise losses in the current Tax Year
- Loss booking does NOT prevent repurchase -- buy back the same securities after 30 days if you believe in the long-term thesis
4. Section 43B: Business Year-End Payments -- Non-Negotiable
For businesses maintaining regular books, certain expenses are deductible ONLY when actually paid (not merely accrued). Section 43B covers some of the most critical business payments:
- PF and ESI (employer contribution): Must be deposited by the due date under the respective acts. If deposited late but before ITR filing: deductible in the relevant Tax Year. If deposited after ITR filing date: deductible in the NEXT year. Ensure all outstanding PF and ESI arrears are deposited before the ITR filing date (or ideally by 31 March for clean year-end).
- MSME vendor payments (Section 43B(h)): Amounts due to Micro or Small Enterprises (Udyam-registered) must be paid within 45 days of acceptance of goods/services (or 15 days if no written agreement). If not paid within this window: the accrued expense is NOT deductible until actually paid. Review all outstanding MSME vendor payables before 31 March and pay all amounts due.
- Employee bonus and incentives: Declared bonus must be actually paid to employees by the ITR filing date to be deductible in the relevant year.
- Bank loan interest: All bank loan interest accrued for the year should be paid by 31 March to avoid any question about deductibility.
5. Advance Tax: The 15 March and 31 March Deadlines
The final advance tax instalment is due 15 March:
- Regular taxpayers: By 15 March, 100% of estimated total tax liability for the year must have been paid (cumulatively across all four quarterly instalments)
- Capital gains after 15 March but before 31 March: A special provision allows payment of advance tax on capital gains arising after 15 March -- by 31 March -- without attracting Section 417 interest for the period 15-31 March
- Section 44AD/44ADA presumptive taxpayers: Single instalment by 15 March covering 100% of estimated liability
- Consequence of missing 15 March: 1% per month interest under Section 417 from the relevant instalment date to the payment date -- relatively modest for the 16-31 March window
- Compute advance tax carefully: Total income for year x applicable slab rate - all TDS credits = advance tax due
6. Section 54EC: Capital Gains Bond Investment
If you sold a capital asset during the Tax Year with LTCG, Section 54EC allows exemption by investing in NHAI or REC bonds:
- Investment window: within 6 months of sale date
- Annual cap: Rs 50 lakh per Tax Year
- Bond lock-in: 5 years
- If the 6-month window straddles 31 March (sale in October, 6 months = April): invest Rs 50L before 31 March in the current year AND Rs 50L after 1 April in the next year -- for up to Rs 1 crore exemption on a single sale
- If bonds are not available or if there is a timing issue: deposit in Capital Gains Account Scheme (CGAS) before ITR filing date to preserve the intention to invest
7. Section 123 (80C) Investments: Hard Deadline 31 March
All Section 123 qualifying investments MUST be made by 31 March of the relevant Tax Year -- not by the ITR filing date:
- ELSS SIP: the March instalment must hit the AMC by 31 March; if the 31st is a Sunday/holiday, invest on the last business day
- PPF annual contribution: bank transfer must be completed by 31 March; PPF accounts have annual limits
- LIC premium due in February/March: pay before 31 March
- 5-year bank FD: open and deposit by 31 March for that year deduction
- Children tuition fees: fees paid by 31 March; most school fees are paid in advance, so this is usually automatic
- Home loan principal repaid: already tracked by bank; ensure the March EMI is debited before 31 March
8. NPS: Additional Rs 50,000 Contribution
The additional NPS contribution deduction (Section 125(1B) -- Rs 50,000 over and above Section 123) is available only under the old regime. The investment must be made in the NPS Tier-I account by 31 March:
- Contribute Rs 50,000 to NPS Tier-I by 31 March for the full additional deduction
- Investment can be made via the NPS portal (npspra.nsdl.com or cams)
- Tax saving at 30% bracket: Rs 50,000 x 30% + cess = approximately Rs 15,600
9. Charitable Donations: Last Date for Current Year Deduction
Section 131 (80G) and Section 80GGA donations made by 31 March qualify for deduction in the current Tax Year:
- Donate to approved institutions by 31 March
- Obtain Form 10BE from the institution (confirming their Form 10BD filing)
- Above Rs 2,000: pay by non-cash mode
- Donations made on or after 1 April: applicable to the NEXT Tax Year
10. Business: Asset Purchase Timing for Full Depreciation
For business owners, asset purchase timing directly affects first-year depreciation:
- Asset put to use BEFORE 31 March: qualifies for FULL YEAR depreciation rate in that year
- Asset put to use ON OR AFTER 1 April (or assets used for less than 180 days in the year): only 50% of annual depreciation rate in first year
- For a computer (40% annual rate): purchase and use by 31 March = 40% deduction in Year 1; purchase 1 April or later = only 20% deduction in Year 1
- For office equipment, machinery, vehicles: same rule -- the 31 March vs 1 April distinction makes a 50% difference in first-year depreciation
- Action: order required business assets in February/early March; ensure delivery and operational use before 31 March
11. ITR-U: Filing Window Consideration
ITR-U (Updated Return) has a 2-year window from the end of the Assessment Year:
- Tax Year 2023-24 (AY 2024-25): ITR-U available until 31 March 2027 -- with 50% additional tax from April 2026
- Tax Year 2024-25 (AY 2025-26): ITR-U available until 31 March 2028 -- with 25% additional tax until 31 March 2027
- Year-end review: check previous year AIS for any missed income that should be disclosed via ITR-U -- better to file voluntarily than wait for an AO notice
12. Why TaxClue
March year-end tax planning integrates capital gains harvesting, business payments, advance tax, investments, and depreciation timing simultaneously. TaxClue provides comprehensive year-end tax review and action plans for all clients. Contact us before 31 March every year for your annual tax review under ITA 2025.