How is Capital Gains Tax Computed As Per Section 48 of Income Tax Act?

In 2025, India’s direct tax collections crossed ₹11.89 crore. It reflects a steady rise in asset transactions and investments. As more investors diversify into property, mutual funds and equities, understanding tax implications becomes crucial. 

This guide will show you everything you need to know about Section 48 of Income Tax Act, different provisions and deductions.

What is Section 48 of Income Tax Act?

Section 48 of Income Tax Act refers to the framework for computing capital gains from the sale or transfer of a capital asset. It specifies that we can get the total capital gain by subtracting the cost of acquisition, cost of improvement and applicable expenses during the transfer from the sale consideration.

Essentially, it ensures that taxpayers are taxed only on their actual gains, not the gross sale value. It forms the backbone of capital gains taxation in India.

Different Provisions Under the Section 48 of Income Tax Act

The framework of Section 48 of Income Tax Act includes specific provisos that modify how the computation of capital gains works, especially under special circumstances:

First Proviso

This applies mainly to non-resident Indians (NRIs). When an NRI sells or transfers shares of a foreign company, the cost of acquisition, expenses incurred for transfer and the full value of consideration must be converted into the same foreign currency that was originally used for purchase. 

Once we calculate the capital gains in that foreign currency, we need to reconvert it into Indian rupees. 

Second Proviso

This relates to the calculation of the indexation benefit of long-term capital gains. NRIs are exempt from this if they made long-term gains from the sale or transfer of long-term capital assets.

Third Proviso

According to the third proviso, the first and second provisos do not apply in cases covered by Section 112A of the Income Tax Act.

Fourth Proviso

It states that for long-term capital assets like bonds and debentures, the second proviso will not apply if the assets are either sovereign gold bonds issued under the Reserve Bank of India or capital-indexed bonds issued by the Government. 

Fifth Proviso

This deals with non-resident assessees holding rupee-denominated bonds. It applies if the Indian rupee appreciates with respect to a foreign currency. In that case, we can ignore the capital gains solely from this currency appreciation when calculating the full value. 

Sixth Proviso

It applies when the transfer of debentures or shares (as specified under Section 47(iii) of the Act) happens as a gift. In such cases, you can consider the market value of those assets on the date of transfer as their full value of consideration. 

Seventh Proviso

If STT (Securities Transaction Tax) has been paid on a transaction, then the deductions under Section 48 of the Income Tax Act cannot be claimed for computing income taxable as capital gains.

What are the Deductions Under The Section 48 of Income Tax Act?

The deduction under Section 48 of Income Tax Act includes all costs directly linked to acquiring, improving or transferring a capital asset. These deductions ensure that tax is only applicable on our real profit. Typical deductions include brokerage fees, registration charges, legal expenses and improvement costs.

Steps to Calculate Capital Gains Under the Section 48 of Income Tax Act

To compute your capital gains under Section 48 of Income Tax Act, here are the steps you can follow:

• Identify the full sale consideration of your asset.
• Subtract the cost of acquisition.
• Deduct the cost of improvement.
• Subtract expenses incurred during the transfer. The result is your taxable capital gain.

Here is a detailed example:

Suppose you bought a property in 2014 for ₹40 lakh and sold it in 2025 for ₹95 lakh. You spent ₹15,000 for brokerage and 10,000 for legal fees. 

Your taxable capital gain will be ₹95,00,000 (sale price) - ₹40,00,000 (Cost of acquisition) - ₹15,000 (Brokerage charges) - ₹10,000 (Legal fees) = ₹54,75,000.

This example shows how eligible deductions under Section 48 of Income Tax Act reduce the taxable amount.

Final Word 

Understanding Section 48 of Income Tax Act empowers investors to manage their capital gains effectively and avoid overpaying taxes. With proper planning, you can make the most of capital gain exemptions. 

For instance, gains from the sale of listed equity shares, equity-oriented mutual funds and units of a business trust, where Securities Transaction Tax has been paid, are eligible for an exemption of ₹1.25 lakh per financial year.