How to Use It explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
The Cost Inflation Index (CII) is notified by the government each year and is used to adjust an asset's purchase cost for inflation when computing long-term capital gains.
How CII works
- The government notifies a CII value for each financial year
- Indexed cost = original cost × (CII of sale year ÷ CII of purchase year)
- This raises the cost base, reducing the taxable long-term gain
How to use it
Find the CII for the year you bought the asset and the year you sold it, apply the formula to get the indexed cost, and subtract it from the sale value to get the indexed long-term capital gain.
Note
Indexation applies to specified long-term assets. Refer to the latest CII notification for the exact values, as a new value is announced each year.
Frequently Asked Questions
What is the Cost Inflation Index?
A government-notified index used to adjust an asset's cost for inflation when computing LTCG.
How do I use the CII?
Indexed cost = original cost × (CII of sale year ÷ CII of purchase year).
Why does indexation help?
It increases the cost base, lowering the taxable long-term capital gain.
Where do I find the latest CII?
From the income-tax department's annual CII notification.
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Talk to an expert →Key Facts About How to Use It
- Applies in: All states across India, under the relevant central law.
- Mode: Mostly online via the official government portal.
- Typical timeline: Ranges from a few days to a few weeks depending on the case.
- Non-compliance: May attract penalties, interest or late fees.
- Expert help: TaxClue completes the entire process end to end for you.
What is the Cost Inflation Index?
A government-notified index used to adjust an asset's cost for inflation when computing LTCG.
How do I use the CII?
Indexed cost = original cost × (CII of sale year ÷ CII of purchase year).
Over 90% of compliance penalties in India arise from missed due dates — timely handling can save businesses thousands of rupees each year.
How to Use It: a key compliance topic in Indian tax and corporate law that businesses and individuals must understand to remain compliant.
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Why This Matters
Staying compliant with Indian regulations protects your business from penalties, interest and unnecessary legal trouble. It is always wise to maintain proper records and documentation so that any future scrutiny can be handled smoothly. Rules and thresholds in capital gains are revised periodically, so it helps to review your obligations at the start of each financial year. Professional guidance from a qualified CA, CS or advocate ensures that filings are accurate and submitted well before the due date.
Small businesses and startups especially benefit from setting up a simple compliance calendar to track recurring deadlines. Government portals now allow most applications and filings to be completed online, reducing paperwork and turnaround time. Keeping your PAN, registration certificates and board resolutions organised makes every subsequent filing faster. When in doubt, it is better to seek clarification early rather than risk a notice or a late-filing penalty later.
A clear understanding of the applicable law helps you make confident, well-informed business decisions. TaxClue's experts regularly assist businesses across India with end-to-end capital gains support at transparent, affordable pricing. Timely compliance also improves your credibility with banks, investors and government authorities. Reviewing your obligations with a professional at least once a year keeps your business audit-ready and stress-free.
Staying compliant with Indian regulations protects your business from penalties, interest and unnecessary legal trouble. It is always wise to maintain proper records and documentation so that any future scrutiny can be handled smoothly. Rules and thresholds in capital gains are revised periodically, so it helps to review your obligations at the start of each financial year. Professional guidance from a qualified CA, CS or advocate ensures that filings are accurate and submitted well before the due date.
Small businesses and startups especially benefit from setting up a simple compliance calendar to track recurring deadlines.