How Income Tax Works in India — Complete Simple Guide (2026)
Note — This guide is for individual taxpayers and salaried people only. If you are looking for business or corporate tax guide read our Corporate Tax Guide here. (https://narrowit.in/how-corporate-tax-works-in-india-complete-simple-guide-2026/)
Table of what you need to know.
- Introduction
- What is Income Tax?
- Who Has to Pay Income Tax in India?
- New Regime vs Old Regime — Simple Explanation
- Income Tax Slabs 2026 — New Regime
- Income Tax Slabs 2026 — Old Regime
- How to Pay Zero Tax Even on ₹12 Lakh Income
- What is TDS — Tax Deducted at Source
- How to Save Tax Legally — Key Deductions
- New Income Tax Act 2025 — What Changed
- Final Summary — Everything in 6 Lines
Introduction
Every working Indian pays income tax. However most people do not fully understand how it works. How much do you actually owe? What is the difference between old and new regime? Also how do you pay zero tax even if you earn ₹12 lakh? This guide explains everything about income tax in simple language. Because understanding your own tax can save you thousands of rupees every year.
What is Income Tax?
Income tax is money you pay to the government from what you earn. The government uses this money to build roads, hospitals, schools, and run the country. Therefore every person earning above a certain limit must pay income tax every year.
In India income tax is collected by the Income Tax Department under the Ministry of Finance. Also it is governed by the new Income Tax Act 2025 which replaced the old 1961 act and came into effect from April 1 2026.
Who Has to Pay Income Tax in India?
Not everyone has to pay income tax. However you must pay if:
You are an individual earning above ₹4 lakh per year under the new regime. Also salaried employees, freelancers, business owners, and even students with income above the limit must pay. Therefore age does not matter — income does.
Senior citizens above 60 years get slightly different slabs. Also super senior citizens above 80 years get additional benefits. However under the new regime these special benefits no longer apply.
New Regime vs Old Regime — Simple Explanation
This is the most confusing part of Indian income tax. However it is actually very simple.
India currently has two tax systems and you choose one every year:
New Regime — simpler, lower rates, fewer deductions This is now the default regime. Also it offers lower tax rates. However you cannot claim most deductions like 80C, HRA, or home loan interest. Therefore it is best for people who do not invest much in tax saving instruments.
Old Regime — higher rates, more deductions This offers higher tax rates. However you can claim many deductions and bring your taxable income down significantly. Therefore it is best for people who invest heavily in PPF, insurance, home loans, and other tax saving options.
Income Tax Slabs 2026 — New Regime
These are the latest tax slabs for FY 2026-27 under the new regime:
Up to ₹4 lakh — Zero tax. Also completely tax free. ₹4 lakh to ₹8 lakh — 5% tax. ₹8 lakh to ₹12 lakh — 10% tax. ₹12 lakh to ₹16 lakh — 15% tax. ₹16 lakh to ₹20 lakh — 20% tax. ₹20 lakh to ₹24 lakh — 25% tax. Above ₹24 lakh — 30% tax.
Big news — income up to ₹12 lakh is effectively zero tax because of Section 87A rebate of ₹60,000. Therefore a person earning ₹12 lakh pays zero rupees in tax under the new regime.
Income Tax Slabs 2026 — Old Regime
Up to ₹2.5 lakh — Zero tax. ₹2.5 lakh to ₹5 lakh — 5% tax. However Section 87A rebate makes this effectively zero too. ₹5 lakh to ₹10 lakh — 20% tax. Above ₹10 lakh — 30% tax.
Also senior citizens above 60 years get zero tax up to ₹3 lakh. Therefore if you are a senior citizen with many deductions the old regime may still be better.
How to Pay Zero Tax Even on ₹12 Lakh Income
This is the most searched question about income tax in India. Because ₹12 lakh sounds like a lot but you can legally pay zero tax on it.
Here is how it works under the new regime:
Your income is ₹12 lakh. Also you get a standard deduction of ₹75,000 automatically as a salaried person. Therefore your taxable income becomes ₹11.25 lakh. Also Section 87A gives you a rebate of ₹60,000. Therefore your final tax becomes zero.
However if your income is ₹12.1 lakh — just ₹10,000 above the limit — you lose the full rebate and pay tax on the entire amount. Because the rebate is all or nothing. Therefore plan carefully if your income is close to ₹12 lakh.
What is TDS — Tax Deducted at Source
Most salaried people never manually pay income tax. Because their employer automatically deducts tax every month from their salary. This is called TDS — Tax Deducted at Source.
Also banks deduct TDS on fixed deposit interest above ₹40,000 per year. Therefore you may be paying tax without even realising it.
At the end of the year you file ITR — Income Tax Return — to tell the government your exact income. Also if too much TDS was deducted you get a refund. Therefore always file ITR even if your tax is zero — it helps with loan applications and visa processing.
How to Save Tax Legally — Key Deductions
These deductions are available under the old regime only:
Section 80C — invest up to ₹1.5 lakh in PPF, ELSS, life insurance, NSC, or home loan principal. Also this is the most popular tax saving option in India. Therefore invest ₹1.5 lakh every year and save up to ₹46,800 in tax.
Section 80D — pay health insurance premium for yourself and family. Also get additional deduction for parents’ health insurance. Therefore you save tax while also protecting your family.
HRA — if you live in a rented house your HRA allowance is partly or fully tax free. Also this can save significant tax for people living in metro cities.
Home loan interest — deduct up to ₹2 lakh per year on home loan interest under Section 24. Therefore buying a home also saves tax.
New Income Tax Act 2025 — What Changed
The government replaced the old Income Tax Act 1961 with the new Income Tax Act 2025. Also it came into effect from April 1 2026. However for most common taxpayers nothing dramatic has changed. Because the new act mainly simplifies the language and structure of tax laws.
Key changes: The term “Financial Year” and “Assessment Year” are now replaced with simply “Tax Year.” Therefore FY 2026-27 is now called Tax Year 2026-27. Also the new act aims to reduce tax disputes and make filing simpler. However the actual tax rates and slabs remain the same as before.
Final Summary — Everything in 6 Lines
Income tax is paid by everyone earning above ₹4 lakh per year. Also India has two regimes — new and old — and you choose one every year. Under the new regime income up to ₹12 lakh is effectively zero tax. Therefore most middle class salaried Indians pay very little or zero tax. Also always file ITR even if your tax is zero because it helps with loans and visas. Because understanding your tax saves you money — therefore spend 30 minutes on it every year.
Disclaimer This article is for informational and educational purposes only. Also tax laws can change. Therefore always consult a qualified CA or tax advisor for your specific situation. Narrowit.in is not responsible for any financial decisions made based on this article.