What is Indexation?

Understanding Indexation Benefits. When calculating capital gains for non-equity mutual funds, property, gold, and similar investments subject to long-term capital gains taxation, indexation benefits play a crucial role in determining the net taxable gain. Inflation substantially erodes the real returns earned from capital assets, a reality most investors recognise but few account for properly in tax calculations.Critical Update for FY 2024-25 (AY 2025-26): Following the Union Budget 2023, indexation benefits for debt mutual funds purchased on or after 1st April 2023 have been eliminated. All gains from such debt funds are now taxed as per the individual’s income tax slab, regardless of holding period. Indexation now applies primarily to:

Debt mutual funds purchased before 1st April 2023 and held for more than 36 months

Real estate/property held for more than 24 months

Gold and unlisted shares held for more than 24 months

The Impact of Inflation on Purchasing PowerConsider a simple illustration of inflation’s effect. A box of confectionery priced at Rs 150 twelve months ago would typically cost approximately Rs 165 today due to inflation, which represents the decline in money’s purchasing power. Given India’s inflation rate, which hovers around 6.5 percent, investing in debt instruments carries inherent risks. After three years, a considerable portion of long-term capital gains may have been diminished by inflationary pressures.Suppose an individual invests Rs 3,50,000 in a debt fund before 1st April 2023. After three years (holding beyond 36 months), the redemption value reaches Rs 4,70,000, yielding an apparent long-term capital gain of Rs 1,20,000. However, factoring in inflation’s impact during this period, purchasing power decreased significantly. Consequently, paying long-term capital gains tax on the entire Rs 1,20,000 without accounting for inflation appears inequitable—which is where indexation becomes relevant.The Indexation MechanismIndexation provides a systematic method for determining an asset’s real value upon disposal by accounting for inflation. The Cost Inflation Index (CII), published annually by the Income Tax department, facilitates this calculation. Examining a debt mutual fund transaction (purchased before 1st April 2023) illustrates this concept clearly.Example with Updated CII Values:Purchase value: Rs 3,50,000

Year of purchase: 2020-21

Sale value: Rs 7,80,000

Year of sale: 2024-25

Nominal long-term capital gain: Rs 4,30,000. Cost Inflation Index (CII) for Recent Years:

FY 2024-25 (AY 2025-26): 363

FY 2023-24 (AY 2024-25): 348

FY 2022-23 (AY 2023-24): 331

FY 2021-22 (AY 2022-23): 317

FY 2020-21 (AY 2021-22): 301

FY 2019-20 (AY 2020-21): 289

Without indexation, tax liability at 20 percent on capital gains of Rs 4,30,000 would amount to Rs 86,000 (plus applicable cess). However, applying indexation substantially reduces LTCG by adjusting the purchase cost for inflation. The indexed purchase value calculation requires referencing the Cost Inflation Index table provided by the tax authorities.In this scenario, the CII for 2020-21 (purchase year) stands at 301, whilst the CII for 2024-25 (sale year) reaches 363. The indexed purchase value calculation proceeds as follows:Indexed purchase value = Purchase value × (CII for sale year ÷ CII for purchase year)

= Rs 3,50,000 × (363 ÷ 301)

= Rs 3,50,000 × 1.206

= Rs 4,22,100Long-term capital gain = Sale value minus Indexed purchase valueTherefore:

LTCG = Rs 7,80,000 minus Rs 4,22,100

= Rs 3,57,900Consequently, tax liability becomes 20 percent of Rs 3,57,900, amounting to Rs 71,580 (plus 4% cess = Rs 74,443)—substantially lower than the Rs 86,000 (plus cess) payable without indexation benefit.Important Limitation: This indexation benefit applies only to debt mutual funds purchased before 1st April 2023. For debt funds purchased on or after this date, the entire gain of Rs 4,30,000 would be taxed as per the individual’s income tax slab (potentially 30% plus cess for high earners), making the tax liability significantly higher.Broad Application of Indexation for FY 2024-25Assets Eligible for Indexation Benefit:

Property/Real Estate: Held for more than 24 months

Full indexation benefit available

Both cost of acquisition and cost of improvement can be indexed

Gold and Jewellery: Held for more than 24 months

Full indexation benefit available

Taxed at 20% with indexation

Unlisted Shares: Held for more than 24 months

Full indexation benefit available

Taxed at 20% with indexation

Debt Mutual Funds: Only if purchased before 1st April 2023 and held for more than 36 months

Indexation benefit available

Taxed at 20% with indexation

Bonds and Debentures: Held for more than 36 months

Indexation benefit available

Taxed at 20% with indexation

Assets NOT Eligible for Indexation:

Listed Equity Shares: LTCG taxed at flat 10% (no indexation)

Equity Mutual Funds: LTCG taxed at flat 10% (no indexation)

Debt Mutual Funds purchased on or after 1st April 2023: Taxed at slab rates (no LTCG benefit, no indexation)

The Income Tax department’s Cost Inflation Index utility enables investors to determine indexed purchase values without manual calculations. The online calculator is available on the official Income Tax e-filing portal.It merits noting that non-equity-oriented or debt funds typically generate returns ranging from 8 to 10 percent, roughly equivalent to India’s inflation rate over recent years. This alignment underscores indexation’s importance in ensuring fair taxation of real gains rather than nominal returns—though this benefit has been significantly curtailed for new debt fund investments from FY 2023-24 onwards.For investors engaged in equity investment strategies or those working with a financial advisor to optimise their portfolio, understanding indexation proves essential when holding non-equity assets. Whilst equity-oriented investments through a stock broker may not benefit from indexation, diversified portfolios often include debt components where this provision significantly impacts after-tax returns (for older investments). Resources at https://stoxbox.in/ offer additional guidance on tax-efficient investment structuring across asset classes, helping stock market participants maximise their net returns whilst maintaining full compliance with taxation requirements.Critical Advisory for FY 2024-25:

Maintain purchase date records for all debt fund investments to determine eligibility for indexation

Review debt fund holdings purchased after 1st April 2023—these no longer offer tax efficiency previously available

Consider alternatives to debt funds for tax-efficient fixed-income investing, such as tax-free bonds, PPF, or Bank FDs depending on your tax bracket

Calculate actual post-tax returns considering your income tax slab for debt funds purchased after 1st April 2023

Consult a Chartered Accountant for complex calculations involving property sales with multiple improvements over time

The removal of indexation benefits for new debt fund investments represents one of the most significant taxation changes in recent years, fundamentally altering the attractiveness of debt mutual funds as a tax-efficient investment vehicle.