### Market Plunge Amidst Fiscal Concerns and Tax Overhaul
Equity markets experienced a significant downturn on Budget Day 2026, with the Sensex plummeting over 1,500 points and the Nifty falling more than 500 points. This immediate reaction signalled investor caution, driven by fiscal deficit projections of 4.3% of GDP for FY27 and gross market borrowing set at ₹17.2 lakh crore. Further unsettling sentiment were announced increases in the Securities Transaction Tax (STT) on futures, from 0.02% to 0.05%, and the taxation of share buybacks as capital gains for all shareholder categories. Despite these immediate headwinds, infrastructure stocks showed resilience, gaining traction as the budget proposed a substantial increase in capital expenditure for FY27 to ₹12.2 lakh crore.
### Income Tax Act, 2025: Simplification and Staggered Compliance
The cornerstone of the budget is the introduction of the Income Tax Act, 2025, set to replace the six-decade-old 1961 legislation and take effect from April 1, 2026. This reform aims to drastically simplify direct tax provisions, reducing the number of sections by approximately 50% and enhancing clarity and ease of compliance for ordinary citizens. Key structural changes include staggered return filing deadlines, with individuals using ITR 1 and ITR 2 to file by July 31, and non-audit business cases and trusts by August 31. The period for revising tax returns has been extended from December 31 to March 31, albeit with a nominal fee. A unified "tax year" system will replace the previous year and assessment year distinction, and taxpayers will be permitted to claim TDS refunds even if returns are filed post-deadline, without penalty.
### Targeted Reliefs and Sectoral Initiatives
Beyond the broad structural reforms, the budget introduced several targeted measures. Interest awarded by Motor Accident Claims Tribunals to natural persons will now be exempt from income tax. Tax Collected at Source (TCS) on overseas tour packages and Liberalised Remittance Scheme (LRS) remittances for education and medical purposes has been reduced to 2%. Minor tax offences are being decriminalised, attracting only fines, while others will face graded penalties. The budget also provided retrospective immunity for certain foreign asset disclosures and announced a one-time six-month foreign asset disclosure scheme for specific individuals. Other fiscal announcements included a ₹10,000 crore investment for the biopharma sector and initiatives for semiconductor manufacturing, MSMEs, and chemical parks, aiming to bolster domestic production and technological advancement. While no changes were made to the income tax slabs, specific relief was provided for cooperative societies regarding inter-society dividend income.
### Historical Context and Future Outlook
Historically, tax reforms have influenced market sentiment, with significant changes like the Goods and Services Tax (GST) and corporate tax rate adjustments leading to varying market reactions and economic shifts. While short-term responses to tax policy can be volatile, long-term market trends are generally driven by underlying economic fundamentals. The Income Tax Act, 2025, is presented as revenue-neutral, focusing on simplification and dispute reduction rather than altering tax rates. The government's stated objective is to foster ease of living and support the vision of "Viksit Bharat". The long-term success of these reforms will hinge on their effective implementation and their ability to stimulate compliance and economic activity, despite the initial mixed reception from the financial markets.