Indexation in Mutual Funds: Tax Rules in 2026

Investing in mutual funds can yield good returns after a few years, but inflation cannot be ignored. Previously, the benefit of indexation was available when calculating taxes on certain investments to account for the impact of inflation. If you want to understand what indexation in mutual funds is, it is essential to grasp not only the old rules but also how mutual funds are taxed today.

What Is Indexation in Mutual Funds?

Indexation is a process in which the purchase price of an investment is adjusted to account for inflation. Previously, the impact of inflation could be factored in when calculating profits for tax purposes on certain eligible investments. The government’s Cost Inflation Index (CII) was used for this purpose.

Example: Suppose you invested Rs. 1 lakh in a qualifying investment and sold it for Rs. 1.6 lakh. Without indexation, your profit would be Rs. 60,000. If, under the old rules, the purchase price had become Rs. 1.2 lakh after indexation, the profit considered for tax purposes would have been Rs. 40,000.

Please note that this example illustrates the old rules. Under current regulations, the benefit of indexation is generally not available for mutual funds.

How Did Indexation Work? Understand With an Example 

Previously, for certain eligible investments, the purchase price was adjusted for inflation using indexation. The government’s Cost Inflation Index (CII) was used for this purpose. Consequently, the adjusted price rather than the actual purchase price was used when calculating the tax.

Indexation Formula

Under the old rules, indexation was calculated using this formula:

Indexed Cost = Original Cost × (Sale Year CII / Purchase Year CII)

Here, Original Cost refers to the initial purchase price of the investment, and ‘CII’ refers to the Cost Inflation Index for the relevant financial year.

Example of Indexation Calculation

Suppose an eligible long-term investment was purchased for Rs. 1,00,000 in the financial year 2018-19 and sold for Rs. 1,60,000 in the financial year 2023-24. The official CII for these years was 280 and 348, respectively.

Description	Amount
Initial investment	Rs. 1,00,000
Selling price	Rs. 1,60,000
CII of the year of purchase	280
CII for the year of sale	348
Purchase price after indexation	Rs. 1,24,286 (approximately)
Profit after indexation	Rs. 35,714 (approx.)
Profit without indexation	Rs. 60,000

In this example, the calculated profit is reduced by approximately ₹24,286 due to indexation. However, this example illustrates the old rules; this formula cannot generally be applied to mutual fund investments sold on or after July 23, 2024.

Is Indexation Available on Mutual Funds in India in 2026? 

Generally, the benefit of indexation is not available when calculating tax on mutual fund gains in 2026. However, the tax liability depends on the fund category and applicable regulations.

Indexation Benefit on Equity Mutual Funds

If you have invested in equity mutual funds, indexation is not factored into the calculation of gains upon sale. Under the rules governing long-term capital gains (LTCG), the portion of eligible LTCG exceeding ₹1.25 lakh in a financial year is taxed at 12.5%. Short-term gains are taxed at 20%, subject to applicable conditions.

What About Debt Mutual Funds?

For debt mutual funds, the fund category and the date of investment are crucial factors. Units of “specified mutual funds” (as defined under Section 50AA) purchased on or after April 1, 2023, are treated as short-term capital assets for tax purposes. These are taxed according to the investor’s applicable tax slab.

Mutual fund categories	Benefit of indexation
Equity Mutual Funds	Not available
Specified debt funds covered under Section 50AA	Not available
Other Mutual Funds	Verification in accordance with relevant tax rules is necessary.

Indexation Benefit on Equity Mutual Funds: What Investors Should Know 

When investing in equity mutual funds, looking only at returns is not enough; it is also essential to understand the tax implications upon sale. When calculating capital gains on equity funds, the purchase price is not adjusted for inflation.

How much tax is levied on equity mutual funds?

If the conditions applicable to the specific equity fund and transaction are met, tax is levied as follows

Type of capital gain	Applicable tax rate
Short-Term Capital Gain (STCG)	20%
Long-Term Capital Gain (LTCG)	12.5% ​​on eligible total gains exceeding ₹1.25 lakh.

What should an investor keep in mind?

Before selling units of an equity mutual fund, check the purchase date, sale date, and holding period. This will help determine whether the profit is short-term or long-term and which tax rules apply to it.

Read Also: Rupee Cost Averaging in SIP: Meaning, Benefits & Examples

Indexation vs Capital Gains: What Is the Difference? 

Indexation and capital gains are two different things. Capital gain is the profit made upon selling an investment, whereas indexation was a method used under older tax rules to adjust the purchase price in line with inflation.

Basis of difference	Indexation	Capital Gains
Meaning	Adjusting the purchase price for inflation	Profit from the sale of an investment
Objective	Incorporating the impact of inflation into tax calculations	Determining the profit or loss from an investment
Calculation	Based on CII, if applicable	Based on the selling price and purchase price
Existing rules	Generally not available on mutual funds.	Calculations are made in accordance with applicable tax regulations.
Example	Under the old regime, a purchase price of ₹1 lakh could become ₹1.2 lakh after indexation.	Selling an investment of ₹1 lakh for ₹1.6 lakh would result in an initial capital gain of ₹60,000.

How to Calculate Mutual Fund Capital Gains Without Indexation 

To determine the profit made from selling mutual fund units, subtract the purchase cost of those units from the sale proceeds. Subsequently, tax is calculated in accordance with applicable tax regulations.

Capital Gains Calculation Formula

Capital Gain = Redemption Value − Cost of Acquisition

Example: Mutual Fund Redemption

Suppose you invested ₹80,000 in a mutual fund and, after some time, received ₹1,10,000 by selling the units.

Description	Amount
Purchase price of the investment	₹80,000
Amount received from the sale of units	₹1,10,000
Total Capital Gain	₹30,000

In this example, your capital gain is ₹30,000. However, the rate at which the entire profit is taxed will depend on the fund category, the holding period, and applicable tax rules.

What should you check before redemption?

Before selling your units, be sure to check the purchase date, the sale amount, and the fund’s tax category. If you invested via SIP, the purchase date for each installment may differ; therefore, it would be incorrect to assume a uniform holding period for all the units.

Why Was Indexation Important for Investors? 

Previously, indexation aided in calculating taxes on certain eligible investments by accounting for the impact of inflation.

• Understanding the impact of inflation: Prices rise over time, which can erode the purchasing power of money. Indexation was a method to incorporate this change into tax calculations.
• Potential reduction in taxable profit: For eligible investments, indexation effectively increased the purchase price. This could lower the capital gains subject to taxation.
• Useful for long-term investments: For certain eligible long-term investments, the cumulative impact of inflation over several years could be factored into the purchase price.
• Understanding investment costs: Indexation allowed investors to see how their investment cost changed when adjusted for inflation.
• Assistance with tax planning: Before selling eligible investments, investors could estimate their potential tax liability by considering indexation and applicable tax rules.
• Distinguishing between nominal profit and real gain: The profit realized from a sale and the purchasing power retained after accounting for inflation are distinct concepts. Under the old rules, indexation helped account for this distinction during tax calculations.

Common Mistakes Investors Make About Indexation 

Investors often harbor certain misconceptions regarding indexation. It is important to understand these to avoid errors in tax calculation when selling mutual funds.

• Assuming indexation applies to every mutual fund: The same tax rules do not apply to all mutual funds. Therefore, determining indexation eligibility solely based on the fund’s name is incorrect.
• Believing old tax rules still apply: While indexation benefits were previously available for certain eligible investments, under current regulations, it cannot be considered a standard benefit for mutual funds.
• Assuming long-term investments are automatically eligible for indexation: Merely holding an investment for a long period does not automatically grant indexation benefits; the holding period and indexation eligibility are distinct concepts.
• Treating all SIP units as identical: In an SIP, separate units are purchased with each installment. Consequently, their purchase dates and holding periods may differ, which impacts tax calculations.
• Estimating tax based solely on the profit amount: A profit of ₹50,000 does not mean every investor will face the same tax liability; factors such as the fund category, purchase and sale dates, and applicable tax rules must also be considered.

Read Also: What is a Capital Protection Fund?

Conclusion

When investing in mutual funds, looking only at the returns is not enough; understanding the applicable taxes is also crucial. While indexation previously aided in tax calculations for certain eligible investments, the benefit is generally not available for mutual funds now. Therefore, before selling your units, be sure to check your fund’s category and the applicable tax rules to avoid any issues later.

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