New Income Tax Act 2025:
What Changes for You from April 2026

The Law That Governed Your Taxes for 65 Years Just Changed

On 1 April 2026, India retired the Income Tax Act, 1961, a law that had survived six decades of amendments, political changes, and economic overhauls. It was replaced by the Income Tax Act, 2025.

To be clear about the most important thing first: your tax rates did not change. Your slabs did not change. The amount you owe did not suddenly increase. The new Act is a structural overhaul, not a new tax burden.

What changed is the structure: language, numbering, terminology, and organisation. The old Act used 819 sections. The new Act covers the same ground in 536 sections. The same house, rebuilt without the sixty years of extensions and emergency repairs that made the original nearly unreadable.

What Exactly Is the Income Tax Act 2025?

The 1961 Act started as a coherent document. Over 65 years, every amendment added new sections, provisos, and sub-provisos that referenced other sections, provisos, and sub-provisos. A single TDS calculation required jumping between four or five sections. Deduction eligibility for HRA involved reading the main section, three provisos, two explanations, and a rule in a separate document. The result was not bad law. It was incomprehensible law.

The Income Tax Act 2025 is the same house, completely rebuilt in a clean, logical layout. It has 536 sections across 23 chapters. The tax policy itself (rates, deductions, and principles) is virtually identical. What changed is how clearly and consistently everything is expressed.

The Biggest Change: Goodbye "Assessment Year"

Anyone who has ever filed an ITR has encountered this. Income earned in Financial Year 2024-25 is filed under Assessment Year 2025-26. The same income has two different year labels depending on context. Which year do you enter in the portal? Which year do your Form 26AS entries carry? The confusion was real and entirely unnecessary.

The new Act fixes this with one clean concept: Tax Year.

Tax Year 2026-27 means income earned from April 2026 to March 2027, filed and assessed in Tax Year 2026-27. The income year and the assessment year are the same label. One year, one name.

Important: the ITR you file in July 2026 covers FY 2025-26 income, which falls under the 1961 Act. That filing still uses AY 2026-27 language. The Tax Year terminology takes effect from FY 2026-27 income onwards.

What Stayed Exactly the Same

Before the changes, the things that affect your actual tax liability:

• Tax slabs and rates: Unchanged. The new regime slabs from Budget 2025 (zero tax up to ₹4L, 5% from ₹4-8L, etc.) continue to apply.
• Zero tax up to ₹12L: The Section 87A rebate of ₹60,000 continues. Resident individuals with taxable income up to ₹12 lakh pay zero tax. For salaried individuals, adding ₹75,000 standard deduction makes the effective tax-free limit ₹12.75 lakh.
• Old regime deductions: Section 80C (₹1.5L), 80D (health insurance), HRA, home loan interest: all continue to exist with renumbered sections.
• New regime as default: The new tax regime remains the default. You must actively opt out to use the old regime (except for business income earners who follow a stricter process).
• PAN and TAN: Your existing PAN and TAN remain valid. No reapplication needed.
• ITR filing deadlines: 31 July for salaried individuals, 31 August for non-audit businesses, 31 October for audit cases.

Five Real Changes That Affect You

1. All TDS Under One Section (Section 393)

Under the 1961 Act, TDS had 30-plus sections. Salary TDS: Section 192. Bank interest TDS: 194A. Professional fees: 194J. Rent: 194I. Each with its own threshold and rate. Looking up the applicable section for any specific payment required knowing the section number in advance. Mistakes were common.

The new Act consolidates all TDS provisions under a single Section 393: a table format that lists every income type, its TDS rate, and its threshold in one place. For anyone who has ever had to look up "which section is TDS on this payment", this is a genuine relief.

2. Better TDS Threshold for Senior Citizens

Senior citizens who earn interest from bank FDs, RDs, and savings accounts get a meaningful upgrade. The TDS deduction threshold on interest income has been raised from ₹50,000 to ₹1 lakh per year. Banks will not deduct TDS unless the total interest in a year exceeds ₹1 lakh, which gives senior citizens more flexibility in managing their cash flow.

Additionally, Form 15G and Form 15H (the declarations used to prevent TDS when income is below the taxable limit) have been merged into a single Form 121. One form instead of two.

3. Virtual Digital Space Powers for Tax Authorities

This is genuinely new and has no equivalent in the 1961 Act. Tax authorities now have explicit statutory authority to conduct search and seizure proceedings in digital accounts: email servers, social media profiles, online trading platforms, and websites. They access codes if required documents are not produced. The provision is aimed at large-scale tax evasion using digital accounts, not at routine salaried employees or small investors.

For the vast majority of salaried employees and small investors: zero practical impact. For anyone with significant undisclosed assets or unexplained digital account transactions: this is a materially expanded enforcement capability.

4. Clearer Dispute Resolution for NRIs and Transfer Pricing Cases

The new Act adds a specific improvement for Non-Resident Indians and multinational companies involved in transfer pricing disputes: the Dispute Resolution Panel must now issue directions along with the points of determination and reasons. This forces clearer reasoning in tax orders, reducing arbitrary assessments.

5. Simpler Language Throughout

The old Act contained sentences like: 'Provided that nothing contained in sub-section (a) of clause (ii) of proviso (B) to section...' Provisions required reading three other sections to understand one sentence. The new Act uses numbered tables, clear column headers, and sentences that follow standard grammatical structure. Tax notices, assessment orders, and deduction rules are written in the same plain language format. A reasonably educated person now has a realistic chance of understanding what a notice is actually saying.

New Regime Tax Slabs for Tax Year 2026-27

These are the slabs that apply to income earned from 1 April 2026 under the new (default) regime. They are unchanged from Budget 2025:

Note: Add 4% Health and Education Cess on total tax. Surcharge applies on income above ₹50 lakh. Section 87A rebate makes tax zero for income up to ₹12 lakh.

Real Example: Arjun's Tax Calculation for Tax Year 2026-27

Arjun is a software engineer in Bengaluru earning Rs.15 lakh CTC. He uses the new tax regime with no deductions beyond the standard deduction. His exact tax calculation for Tax Year 2026-27:

Arjun pays ₹97,500 in tax on Rs.15 lakh income. Effective rate: 6.5% of gross salary. Now compare if Arjun had significant deductions:

With Rs.1.5L under 80C, Rs.25,000 under 80D, and Rs.1.8L HRA exemption under the old regime: taxable income drops to Rs.10.7L and tax is approximately Rs.94,500. That is Rs.3,000 less than the new regime. For salaried employees with deductions of this size, the old regime saves a marginal amount. For employees with fewer deductions or higher income, the new regime's lower slab rates typically come out ahead. Run the Income Tax Calculator with your specific numbers before deciding.

Income Tax Act 1961 vs 2025: At a Glance

Below is a side-by-side summary of the structural changes. Note : none of these change your tax amount; they change how the law is written and administered:

What Should You Actually Do Right Now?

For most salaried employees and small investors, the honest answer is: almost nothing changes in practice for the filing you do this year.

Here is a quick checklist:

• For FY 2025-26 ITR (due July 2026): File as usual under the old 1961 Act. Select "AY 2026-27" on the portal. Same forms, same deductions.
• For Tax Year 2026-27 onwards: The portal will update forms with the new Tax Year terminology. No action needed from you. Follow the updated forms when they appear on the portal.
• Check your Form 26AS: For periods before April 2026, it uses Assessment Year. For periods after, it will transition to Tax Year labelling. Make sure your TDS credits reconcile correctly.
• Senior citizens: Review whether Form 15H (now Form 121) submission is needed based on your bank interest. The new ₹1 lakh threshold means fewer people need to submit it.
• Business owners: If you had mapped your accounting system to old section numbers, update references. Section 192 (salary TDS) is now part of Section 393's table. Your tax software provider should release updates.