Complete Income Tax & ITR Filing Guide in India (2026)
This guide explains everything about Income Tax in India — who needs to file ITR, tax slabs under Old vs New Regime, freelancer taxation under Section 44ADA, due dates, penalties, and compliance rules.
What is Income Tax?
Income Tax is a direct tax levied by the Government of India on income earned by individuals and businesses. The tax amount depends on your total annual income and applicable tax slab.
Income can include salary, business income, freelance income, rental income, capital gains, and other sources.
Who Must File ITR?
- Individuals whose income exceeds basic exemption limit.
- Freelancers and self-employed professionals.
- Businesses and LLPs.
- Individuals claiming tax refunds.
- People with foreign assets or income.
Documents Required for ITR Filing
- PAN & Aadhaar
- Form 16 (for salaried)
- Bank statements
- Investment proofs
- Business income records (for freelancers)
Income Tax Slabs – Old vs New Regime
Taxpayers can choose between the Old Regime (with deductions) and New Regime (lower rates but fewer deductions).
New Regime (FY 2025-26)
- Up to ₹3,00,000 – Nil
- ₹3L – ₹6L – 5%
- ₹6L – ₹9L – 10%
- ₹9L – ₹12L – 15%
- ₹12L – ₹15L – 20%
- Above ₹15L – 30%
Should You Choose Old or New Tax Regime?
The Old Regime is beneficial if you claim deductions such as:
- Section 80C (LIC, ELSS, PPF)
- Home Loan Interest (Section 24)
- Medical Insurance (80D)
If you do not claim many deductions, the New Regime often results in lower tax.
ITR Filing for Freelancers (Section 44ADA)
Freelancers such as designers, developers, consultants can opt for presumptive taxation under Section 44ADA if annual receipts are within prescribed limits.
Under 44ADA, 50% of gross receipts are considered taxable income, simplifying compliance.
Detailed explanation: ITR for Freelancers Guide
What is a Nil ITR Return?
A Nil return is filed when your income is below taxable limits but you want to maintain compliance or claim refund.
Learn more: Nil ITR Explained
ITR Due Dates in India
- Individuals (non-audit): 31 July
- Businesses requiring audit: 31 October
- Revised return: 31 December
Penalty for Late Filing
Late filing may attract penalty up to ₹5,000 under Section 234F depending on income level.
Useful Tax & Salary Tools
Income Tax Calculation Example (Practical Breakdown)
Let’s understand how tax is calculated under the New Regime with a real example.
Example:
Annual Salary: ₹10,00,000
- ₹0 – ₹3,00,000 → Nil
- ₹3L – ₹6L (₹3L) → 5% = ₹15,000
- ₹6L – ₹9L (₹3L) → 10% = ₹30,000
- ₹9L – ₹10L (₹1L) → 15% = ₹15,000
Total Tax = ₹60,000 (before cess)
You can estimate your salary structure using our Salary Break-up Calculator.
Frequently Asked Questions
Is ITR mandatory if income is below ₹2.5 lakh?
Not mandatory unless specific conditions apply, but filing helps in visa processing, loans, and refunds.
Can freelancers file ITR without CA?
Yes. Freelancers can file using ITR-3 or opt for presumptive taxation under 44ADA.
What happens if I miss the deadline?
You may pay late fee and interest. Filing as soon as possible reduces penalties.