About this tool
The Cost Inflation Index (CII) lets you inflate the original purchase price of a long-term capital asset to today's rupees, so you only pay tax on real (above-inflation) gains. The base year is FY 2001-02 (CII = 100). FY 2024-25 CII is 363. The 23 July 2024 Budget shifted new property sales to 12.5% without indexation, but grandfathered pre-23-July-2024 properties can pick the lower of 20% indexed or 12.5% raw.
How it works
Step 1
Identify the financial year you bought the asset and look up the CII for that year.
Step 2
Indexed cost = purchase price × (CII of sale year ÷ CII of purchase year).
Step 3
Indexed long-term gain = sale price - indexed cost.
Step 4
For pre-23-July-2024 property: pay the lower of 20% on indexed gain OR 12.5% on raw gain. Post that date: only the 12.5% no-indexation route is available.
How to use the India Cost Inflation Index (CII) Indexation Calculator
The India Cost Inflation Index (CII) Indexation Calculator is a browser-based tool that runs entirely on your device. Inputs you enter never reach a server - all calculations happen client-side in JavaScript. This means:
- Privacy: nothing is logged, sent, or stored by 3Tej. Inputs disappear when you close the tab.
- Speed: results update as you type. No network round trip.
- Offline use: once the page is cached, it works without internet.
- No signup: no account, no email, no rate limits.
Step by step
- Enter your inputs in the form above. Each field is labeled with its unit (currency, percent, kg, etc.) and the expected range.
- Read the result as it updates. The number reflects the formula commonly accepted in India Cost Inflation Index (CII) Indexation-related calculations.
- Adjust to see sensitivity: change one input at a time and watch how the output moves. This is the fastest way to understand which variable matters most.
- Copy or screenshot the result for later reference. The page state persists for the session if your browser allows it.
When you would use this
- Quick estimates: when you need a number now and don't want to open a spreadsheet.
- Sensitivity analysis: testing how a result changes as inputs vary, before committing to a real-world decision.
- Comparison: running the same calculation with different inputs to compare options side by side.
- Learning: building intuition for how the underlying math behaves.
- Documentation: capturing a snapshot of inputs and outputs at a point in time.
Frequently asked questions
What is the CII for FY 2024-25?
The CBDT-notified Cost Inflation Index for FY 2024-25 is 363. The base year FY 2001-02 has CII = 100. The CII rises roughly 5-7% per year reflecting general inflation.
Does indexation apply to listed equity shares?
No. Listed equity LTCG (held over 12 months) is taxed at 12.5% with no indexation - the ₹1.25 lakh annual exemption applies. CII indexation is for unlisted shares, debt funds (pre-2023 purchases), property, gold, etc.
Can I still use indexation after July 2024?
Yes - but only for property bought before 23 July 2024. The grandfathering lets sellers compute both 20% indexed and 12.5% raw and pay the lower. New (post-July-2024) property sales are stuck with 12.5% no-indexation.
What about debt mutual funds?
Debt funds purchased on or after 1 April 2023 lose indexation entirely - taxed at slab rate as STCG regardless of holding period. Pre-April-2023 debt-fund holdings still get indexation if held >36 months.
Where can I find official CII?
CBDT notifies the CII each year via gazette notification. Income Tax Department's incometax.gov.in publishes the historical table from FY 2001-02 onwards.
Is the India Cost Inflation Index (CII) Indexation Calculator accurate?
The India Cost Inflation Index (CII) Indexation Calculator applies the standard formula for india cost inflation index (cii) indexation. Accuracy is limited only by your input precision. For decisions with material consequences, use the result as a starting point and verify with a qualified professional or the relevant official source.
Is the India Cost Inflation Index (CII) Indexation Calculator free?
Yes. 100% free, no signup, no payment, no API key. The site is funded by display ads that appear around the tool but not inside the calculation flow.
Are my inputs saved?
No. Inputs stay in your browser tab. Closing the tab discards them. The site uses Google Analytics for traffic measurement (anonymized) but does not see what you type into the form.
Can I use the India Cost Inflation Index (CII) Indexation Calculator on my phone?
Yes. The tool is responsive and tested on iOS Safari, Android Chrome, and major desktop browsers. Touch targets meet Apple's 44pt and Google's 48dp minimum guidance.
How do I report a bug or suggest improvement to the India Cost Inflation Index (CII) Indexation Calculator?
Email hi@3tej.com with the URL of this page and a description of what you saw vs expected. We typically respond within 72 hours and update calculators when rules or formulas change.
How accurate is the India Cost Inflation Index (CII) Indexation Calculator?
It applies the standard formula. Accuracy is limited only by your input precision. For decisions with material consequences (taxes, medical, legal, structural), use the result as a starting point and verify with a qualified professional in the relevant field.
Is the India Cost Inflation Index (CII) Indexation Calculator free to use?
Yes. 100% free, no signup, no payment, no API key. The site is funded by display ads around the tool but not inside the calculation flow.
Are my inputs saved anywhere?
No. All inputs stay in your browser tab. Closing the tab discards them. The site uses Google Analytics for traffic measurement (anonymized) but the analytics never see what you type into the form.
Does the India Cost Inflation Index (CII) Indexation Calculator work offline?
Yes. Once the page has loaded, it works without internet. The calculation runs in JavaScript on your device.
Can I share results from the India Cost Inflation Index (CII) Indexation Calculator?
Take a screenshot or copy the output. The page doesn't generate shareable URLs for specific calculations - inputs stay in your browser only.
Why are the results different from another india cost inflation index (cii) indexation tool?
Most likely: different formula assumptions, different default values, different rounding rules, or different applicable rates. Check the methodology if both tools document it. Both can be valid for different scenarios.