Income Tax Act 1961 is the primary law in India that governs the levy, collection, administration. And enforcement of income tax. It defines taxable income, tax rates, exemptions, deductions. And procedures for filing returns, assessments. And appeals for individuals, businesses.
Category
Federal tax legislation
Used for
Calculating and collecting income tax
Common confusion
Mistaking it for GST or state tax laws
Also called
ITA 1961, Income Tax Law of India
Often discussed with
ITR Filing for Salaried Individual, Tax Planning & Advisory

India's main tax law is the Income Tax Act 1961. It started on April 1, 1962. It took the place of an older tax law from 1922.
Related glossary terms: Income Tax Slab, Tax Deducted at Source, Form 26AS.
This law covers all of India. It applies to many kinds of income. These include salary, business money. And money from selling things.
It also covers rent from property. The law says who must pay tax. It tells how much to pay. It explains how to follow the rules.
The law splits income into five groups. These are Salaries, House Property, Business, Capital Gains. And Other Sources. Each group has its own tax rules.
The law explains important words. These include "resident" and "non-resident." It also covers "assessment year" and "previous year." These words decide who pays tax.
The law uses tax rates that go up. People and businesses add up their income. They take out some money that isn't taxed.
They also take out deductions. One common one is Section 80C. Then they figure out how much tax to pay.
The tax rates change each year. In 2024-25, people who earn up to ₹2.5 lakh pay no tax. Higher earners pay 5% to 30%.
Some businesses can use simpler tax rules. These are in Sections 44AD, 44ADA. Or 44AE. The law also says tax must be taken from some payments.
This is called Tax Deducted at Source (TDS). It can also be collected at the start. This is called Tax Collected at Source (TCS).

This law helps the government get money. The money pays for roads, schools. And help for people. It also makes tax rules clear.
People can lower their tax in legal ways. They can use deductions and exemptions. Following the law helps avoid trouble.
Trouble can mean fines or extra charges. It can even mean court cases. The law also makes money matters more open.
People must share their income and what they own. This helps stop cheating. It helps the economy stay strong.
This law matters most in some cases:
Not following the law can cause problems. You might pay fines or extra money. You could even face court.
The law also applies to Indians living abroad. They must pay tax on money from India.
GST applies to the supply of goods and services. While the Income Tax Act 1961 applies to income earned by individuals and entities.
The Wealth Tax Act taxed net wealth above a threshold. But it was abolished in 2015. The Income Tax Act 1961 taxes income, not wealth.
While the Income Tax Act 1961 provides the legal framework, interpreting its provisions—such as capital gains on inherited property or taxability of foreign income—often requires professional guidance, especially for complex financial situations.
Ramesh, a salaried employee in Mumbai, earns ₹8 lakh per year. Under the Income Tax Act 1961, he calculates his taxable income after deducting ₹1.5 lakh under Section 80C. He files ITR-1 by July 31 and pays tax based on the applicable slab rates. If he misses the deadline, he may face a late fee of ₹5,000.
Income Tax Slab is income Tax Slabs are predefined ranges of annual income set by the Indian government that determine the tax rate applicable to an individual or entity. Each slab has a different tax rate, with higher income ranges attracting progressively higher rates, ensuring a graduated taxation system based on earning capacity.
TDS is a tax the Indian government takes from income when it is paid. The payer takes a small part of the payment. They send it to the government for the person who earns the money.
Form 26AS is an annual consolidated tax statement issued by the Income Tax Department of India. It shows details of tax deducted at source (TDS), tax collected at source (TCS), advance tax paid, self-assessment tax. And high-value transactions linked to a taxpayer’s Permanent Account Number (PAN). Form 26AS helps verify tax credits before filing income tax returns.
Section 80C lets Indian taxpayers cut taxable income by up to ₹1.5 lakh each year. It covers life insurance, provident funds. And tuition fees.
Assessment Year is the 12-month period starting on April 1 and ending on March 31 of the next calendar year, during which the income earned in the previous financial year is assessed, taxed. And filed with the Income Tax Department of India. It's the year in which taxpayers report, calculate.
ITRFiling.org.in
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