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Last updated: 2026-05-04
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compare_arrows New Income Tax 2025 — Form & Section Finder

Old IT Act 1961 vs New IT Act 2025 — Complete Form & Section Mapping

Tax Year 2026-27 | Effective April 1, 2026 | Income Tax Act, 2025
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Draft Rules Only — Not for Live Tax Filing

The Income Tax Act, 2025 comes into effect on April 1, 2026 (Tax Year 2026-27). Section mappings and form numbers are currently being finalized by the CBDT through the Draft Income Tax Rules, 2026. Do NOT use these mappings for live tax filing until the final rules are notified. Always verify with official sources at incometax.gov.in and consult a qualified Chartered Accountant.

menu_book Complete Guide: Old IT Act 1961 vs New Income Tax Act 2025

The Income Tax Act, 2025 has brought the most comprehensive overhaul of India's tax system in over six decades. This tool provides a detailed side-by-side comparison of every major form, section, and compliance requirement under the old IT Act 1961 and the new IT Act 2025. Whether you are a salaried individual, business owner, tax professional, or chartered accountant, this tool helps you quickly find how your familiar forms and sections have changed, been renumbered, or replaced under the new law. The new Act introduces the unified concept of "Tax Year" replacing the old "Financial Year (FY)" and "Assessment Year (AY)" dual system.

What Has Changed Under IT Act 2025?

The new Income Tax Act consolidates and renumbers hundreds of sections from the original 1961 legislation. While many core concepts remain the same, the section numbers, forms, filing processes, and compliance requirements have been significantly updated. The most notable changes include the new default tax regime with revised slabs and enhanced standard deduction, renumbered TDS/TCS sections for better organization, digital-first compliance through the redesigned Income Tax portal, and the introduction of the Annual Information Statement (AIS) alongside the traditional Form 26AS.

Why Use This Tool?

Taxpayers and professionals who have been using the old IT Act sections and forms for decades will find this tool invaluable for the transition. Simply search for any old section number or form name (including Form 15CA, Form 15CB, Form 10F, Form 16, Form 16A, Form 24Q, Form 26Q, Form 27Q, Form 49B, and many more), and instantly see its new equivalent under the IT Act 2025. The tool also highlights key changes in descriptions, filing portals, applicable rates, and compliance requirements. Use the category filters to focus on specific areas such as TDS/TCS forms, return filing, deduction sections, or other compliance forms.

Important: Verify with Official Sources

This tool is prepared based on the Income Tax Act, 2025 as enacted by Parliament. However, the CBDT is still issuing final rules and notified forms through the Draft Income Tax Rules, 2026. Section mappings, form numbers, and filing procedures are subject to change. Always verify the latest provisions with official sources including the Income Tax portal (incometax.gov.in), CBDT notifications, and consult a qualified Chartered Accountant for specific tax planning advice.

Frequently Asked Questions about Form Ready Reckoner

Find answers to common questions about form ready reckoner. Click on any question to expand the answer.

A Form Ready Reckoner is a quick-reference guide that helps Indian taxpayers identify the correct Income Tax Return (ITR) form applicable to their specific income profile. With multiple ITR forms (ITR-1 through ITR-7) and frequent changes in eligibility criteria, choosing the wrong form can lead to a defective return notice from the Income Tax Department. This ready reckoner simplifies the process by matching your income sources, residential status, and asset holdings to the appropriate ITR form, ensuring accurate and hassle-free tax filing.

The ITR form you should file depends on your income sources and taxpayer category: ITR-1 (Sahaj) for salaried individuals with income up to ₹50 lakh from salary, one house property, and other sources; ITR-2 for individuals/HUFs with capital gains, foreign income, or more than one house property; ITR-3 for individuals/HUFs with business or professional income; ITR-4 (Sugam) for presumptive taxation under Section 44AD/44ADA; ITR-5 for firms, LLPs, and AOPs; ITR-6 for companies; and ITR-7 for trusts, institutions, and political parties. Use this ready reckoner to confirm your correct form.

The due dates for filing Income Tax Returns for FY 2026-27 (AY 2027-28) are: July 31, 2027 for individuals and HUFs not requiring audit; October 31, 2027 for businesses and professionals requiring audit under Section 44AB; and November 30, 2027 for taxpayers requiring transfer pricing certification under Section 92E. Filing after the due date attracts a late fee under Section 234F (up to ₹5,000 for income above ₹5 lakh and ₹1,000 for income up to ₹5 lakh) and interest under Section 234A at 1% per month on outstanding tax.

ITR-1 (Sahaj) can be filed by resident individuals whose total income does not exceed ₹50 lakh and income comprises only of: salary/pension, income from one house property (excluding brought forward losses), and income from other sources (like interest, dividend, family pension). It cannot be used by individuals who are directors in a company, have invested in unlisted equity shares, have foreign income/assets, have capital gains, or have business/professional income. NRIs and RNORs are also not eligible for ITR-1.

ITR-3 is for individuals and HUFs having income from business or profession, requiring detailed disclosure of profit & loss accounts, balance sheet, and actual income computation. ITR-4 (Sugam) is for those opting for presumptive taxation under Section 44AD (business with turnover up to ₹2 crore/₹3 crore for digital transactions) or Section 44ADA (professionals with gross receipts up to ₹75 lakh), where income is presumed at a fixed percentage of turnover. ITR-4 is simpler as it does not require detailed financial statements, making it ideal for small business owners and freelancers.

You should file ITR-2 instead of ITR-1 if you have any of the following: capital gains from sale of shares, mutual funds, property, or other assets; income from more than one house property; foreign income or foreign assets including foreign bank accounts; directorship in a company; investment in unlisted equity shares; agricultural income exceeding ₹5,000; or if you are a non-resident or resident but not ordinarily resident (RNOR). ITR-2 does not cover business or professional income — for that, you need ITR-3.

ITR-5 is filed by firms, Limited Liability Partnerships (LLPs), Association of Persons (AOPs), Body of Individuals (BOIs), and artificial juridical persons — but not by companies or those filing ITR-7. ITR-6 is exclusively for companies registered under the Companies Act, other than companies claiming exemption under Section 11 (income from property held for charitable/religious purposes). ITR-7 is for trusts, political parties, institutions, colleges, and entities required to file returns under Section 139(4A), 139(4B), 139(4C), or 139(4D), typically claiming tax exemptions on charitable or religious activities.

gavel Legal Disclaimer

This calculator is for informational and educational purposes only. Tax calculations are based on the Income Tax Act, 2025 (effective April 1, 2026) and may not reflect all individual circumstances. Tax slabs, rebate thresholds, and deduction limits are subject to change through government notifications. This tool should not be considered as tax advice. Always verify the latest tax rules at incometax.gov.in and consult a qualified Chartered Accountant for personalized guidance.

verified Source: Income Tax Department, Govt. of India • Last updated: 2026-05-04

update Latest Updates & Regulatory Changes

NEW

new_releases Income Tax Act, 2025 Effective

The new Income Tax Act, 2025 came into effect from April 1, 2026, replacing the Income Tax Act, 1961. New tax slabs, revised rebate u/s 87A (up to ₹60,000), and ₹75,000 standard deduction under the default New Regime are now applicable.

UPDATED

update New Tax Regime is Default

Under the Income Tax Act, 2025, the New Tax Regime is the default regime. Taxpayers must explicitly opt for the Old Regime. Salaried individuals with taxable income up to ₹12,75,000 pay zero tax under the New Regime.

IMPORTANT

priority_high Rebate u/s 87A Enhanced

Section 87A rebate increased to ₹60,000 (from ₹25,000) for taxable income up to ₹12,00,000 under the New Regime. This effectively makes salaried income up to ₹12,75,000 tax-free.

NEW

table_chart 7-Slab Structure Introduced

The New Regime now has 7 tax slabs (0%, 5%, 10%, 15%, 20%, 25%, 30%) instead of the previous 5-slab structure, providing more gradual tax progression.

description Terms, Rules & Regulations

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Income Tax Act, 2025

All income tax calculations are governed by the Income Tax Act, 2025, effective from April 1, 2026. The Act replaces the Income Tax Act, 1961 and introduces revised tax slabs, enhanced rebates, and updated compliance requirements. Taxpayers must file returns as per the new provisions.

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Assessment Year & Financial Year

The Financial Year (FY) runs from April 1 to March 31. The Assessment Year (AY) is the year following the FY in which income is assessed and taxed. For FY 2026-27, the AY is 2027-28. ITR must be filed by the due date specified for the applicable AY.

policy

Tax Regime Selection

The New Tax Regime is the default regime under the Income Tax Act, 2025. Taxpayers wishing to opt for the Old Regime must explicitly select it while filing their ITR. Once opted out of the New Regime, salaried individuals can switch back only once. Business/professional taxpayers have limited switching options.

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Data Accuracy

Tax slabs, rebate limits, and deduction caps are sourced from the Income Tax Act, 2025 as notified by the Government of India. Surcharge rates, marginal relief provisions, and cess rates are applied as per statutory guidelines. Users are advised to cross-verify with official sources.

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