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Ventura Wealth Clients
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In the world of finance and taxation, navigating complex terms and understanding their implications can be challenging. One such term for many Indian taxpayers is the Cost Inflation Index (CII). This blog serves as a comprehensive guide, demystifying the CII, its impact on capital gains tax calculation, and its significance for taxpayers.

What is the Cost Inflation Index (CII)?

The Cost Inflation Index (CII) is a statistical tool employed by the Indian government to measure and adjust for inflation in the purchase price of long-term capital assets.

Key points for the Cost Inflation Index (CII)

  • Published annually: The CII is notified by the Central Board of Direct Taxes (CBDT) every year in the month of June.
  • Base year: The base year for calculating the CII is 2001-02, with its value set to 100.
  • Purpose: The CII helps adjust the purchase price of long-term capital assets for inflation, thereby providing a more accurate reflection of their real value at the time of sale and determining the capital gain earned.

How does CII impact capital gains tax calculation?

Capital gains tax, levied on the profits earned from selling capital assets, is calculated based on the difference between the sale price and the purchase price of the asset. However, the purchase price is adjusted for inflation using the CII to arrive at a more realistic capital gain.

Here's how it works:

  1. Calculate the Cost of Inflation-Adjusted Acquisition Cost (COIAC):

    • Multiply the purchase price of the asset by the CII of the year of sale.
    • COIAC = Purchase Price x CII (Year of Sale) / 100

  2. Calculate the Capital Gain:

    • Capital Gain = Sale Price - COIAC


  • In 2010, you purchased a property for ₹500,000.
  • You sell the property in 2024 for ₹1,500,000.
  • The CII for the year of sale (2024) is 348.

Without CII:

  • Apparent Capital Gain = ₹1,500,000 (Sale Price) - ₹500,000 (Purchase Price) = ₹1,000,000

With CII:

  • COIAC = ₹500,000 (Purchase Price) x 348 (CII of 2024) / 100 = ₹1,740,000
  • Capital Gain = ₹1,500,000 (Sale Price) - ₹1,740,000 (COIAC) = ₹-240,000

As you can see, applying the CII reduces the apparent capital gain, potentially leading to a lower capital gains tax liability.

What are the benefits of CII?

  • Fairness and accuracy: By adjusting for inflation, the CII ensures a fairer calculation of capital gains, reflecting the true profit earned considering the changing value of money over time.
  • Reduced tax burden: For taxpayers, the CII can potentially lead to a lower taxable capital gain, resulting in reduced tax liability.

Which assets are applicable to CII?

The CII applies to long-term capital assets such as the ones below.

  • Equity shares and securities held for more than 12 months
  • Debt-oriented mutual funds held for more than 36 months
  • Immovable property (land and buildings) held for more than 24 months
  • Unlisted shares held for more than 24 months

Important considerations

  • Impact on different asset classes: The impact of the CII can vary depending on the asset class and the holding period. For example, the impact on stocks held for a longer period might be more significant than on those held for a shorter period.
  • Other factors affecting capital gains tax: The CII is just one-factor influencing capital gains tax calculation. Other factors like indexation benefits for specific assets and tax exemptions also play a role.


Understanding the Cost Inflation Index is crucial for Indian taxpayers, particularly those dealing with long-term capital assets. The CII helps adjust for inflation, providing a fairer representation of capital gains and potentially reducing tax liabilities. However, it's essential to consult a tax advisor for personalised guidance and a comprehensive understanding of tax implications based on your specific circumstances.

Disclaimer: This blog is for informational purposes only and should not be considered tax advice.