What is Indexation And How Can It Reduce Your Tax Liability?

Akshita Maheshwari
April 8, 2023
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What Is Indexation?

Indexation is a tax-saving strategy popular among Indian investors when filing their income tax returns. Essentially, the investor’s taxable income is reduced after considering inflationary effects on their returns.

Investment in financial assets like mutual funds or stocks requires you to pay capital gains tax. Without indexation, this amount is based on the sale price at purchase; with indexation however, taxation is reduced because inflation has been adjusted and your taxable gain adjusted for inflation at a lower rate.

This strategy makes sense since the money you earn from investment may not be worth as much due to inflation. By factoring in inflation with indexation, you can save on taxes while still investing your funds and making sound financial decisions.

How Does Indexation Work?

Indexation is a tax benefit available to Indian investors which helps reduce their taxable income. It involves increasing the cost of investments or capital assets according to inflation since purchase, which will then be reflected in your taxes. Important note that indexation must be done for any capital asset sold within three years of purchase for it to take effect.

Here is a brief overview of how it works:

  • Before you can begin, you will need to calculate the Cost Inflation Index (CII) for the year in which you purchased and sold an asset.
  • Once the CII rate for that year has been released, you can adjust your original purchase cost with this – known as Indexed Cost of Acquisition (ICA).
  • Next, use the CII rate for the year in which you sold your asset and multiply it with your Indexed Cost of Sale (ICS), also referred to as Indexed Sales Cost (ICS).
  • Finally, subtract ICA from ICS and use this net figure when calculating long-term capital gains tax on sale proceeds.

By indexing your capital assets or investments, you can take advantage of inflation and minimize your tax liability when selling them!

How Can Indexation Reduce Tax Liabilities?

Understanding indexation is one thing, but understanding its potential to reduce tax liabilities is quite another.

Here is the gist: Indexation allows you to adjust your profits for inflation. To do this, find out the Cost Inflation Index (CII) applicable in both years (purchase and sale) and apply that figure to lower your tax liability.

Let us say you purchased a stock in 2022 for Rs10,000 and sold it two years later in 2023 for Rs12,500. Assuming the CII for 2022 was 317 and 2023 was 333, indexation would be calculated as follows:

Cost Price = Rs10,000 (2022) Certified Investment Income (CII) (2022) = 317

Indexed Cost Price = (10,000*333)/317 = Rs10,545

Then, to calculate the indexed profits, we simply subtract the indexed cost price from the selling price (Rs 12,500 – Rs 10,545) which gives us the indexed profit of Rs 1,955.

Your income tax liabilities will be significantly reduced thanks to India’s lower-rate income tax laws.

About Cost Inflation Index

In India, the CII is periodically adjusted by the Indian government and helps determine your assets’ indexed cost of acquisition and improvement, which will assist with calculating capital gains tax.

Indexation can help minimize inflation-related losses, while past CIIs can be utilized as input in your decision-making process and predict how much tax liability you will owe in any given financial year. This empowers investors in India to be mindful of their investments and make strategic decisions with more insight.

Tips on Minimizing Tax Liability from Indexation

Now that you understand indexation and its effect on taxes, here are some tips to maximize its benefit in terms of reducing your tax liability.

  1. Maintain Accurate Records

Good records will aid in making the case for indexation when filing taxes, so make sure all documents related to investments are stored safely and clearly marked so they can be quickly referred to.

  1. Choose Long-Term Investments

Indexation offers you a greater benefit over time, so if you are thinking of making an investment that has a long-term horizon, it could potentially reduce your tax liability in the long run.

  1. Monitor Inflation Closely

It is essential to keep an eye on inflation and adjust costs for it when filing for tax exemption. Doing this allows any profits made from investments to be measured in real terms rather than just nominal ones–leading to a higher exemption amount.

These tips can help Indian investors reduce their tax liabilities while reaping higher returns from investments.


Indexation is an invaluable asset for Indian investors that can help them save money if used strategically. By researching and understanding its basics and how to utilize it correctly, you may reduce your tax liability and make more profitable investments in the long run. There is no doubt that learning more about this phenomenon holds a wealth of possibilities within Indian investing circles.

No matter your investment level, being able to reduce your tax liability is always worthwhile. If you already own mutual funds and stocks, understanding this concept could help maximize the potential of those assets and safeguard your financial future.


Q1. What is the formula for calculating indexation?

A1. Indexed Cost of Acquisition = [CII for the year of transfer (sale)* Cost of acquisition]/ CII for the first year in which the asset was held by the assessee

Q2. What is the indexation for FY 2023-24?

A2. The CII for FY23 relevant to assessment year (AY) 2023-24 is 331.

Q3. Which assets are eligible for indexation?

A3. Long-term investments, which include debt fund and other asset classes.

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