Capital Gain Indexation Calculator

What is Capital Gain Indexation?

Capital gain indexation is the process of adjusting the purchase cost of a capital asset for inflation, which can reduce your taxable long-term capital gain. Under the Income Tax Act 2025 (which replaces the Income Tax Act, 1961 from Tax Year 2026-27 onwards), the concept of indexation continues to play a key role — though its scope has been significantly narrowed since Union Budget 2024.

It is specifically beneficial for long-term assets like:

• Real estate properties (land or buildings) acquired before 23rd July 2024 and held for more than 24 months
• Bonds and other eligible investments (in limited cases, e.g., Capital Indexed Bonds, Sovereign Gold Bonds issued by RBI)

The Cost Inflation Index (CII), released by the CBDT (Central Board of Direct Taxes) on an annual basis, is used to determine the inflation-adjusted cost of acquisition, effectively lowering your total tax liability wherever indexation applies.

CII for Tax Year 2025-26: 376 (notified by CBDT vide Notification No. 70/2025 dated 1st July 2025)

What is the Formula for Computing Indexed Capital Gains?

The formula for calculating the indexed cost of acquisition is as follows:

Indexed Cost of Acquisition = (Purchase Price × CII of Sale Year) ÷ CII of Purchase Year

Then,

Long-Term Capital Gain (LTCG) = Sale Value − Indexed Cost of Acquisition − Other Expenses

How to Use the Savetaxs Capital Gain Indexation Calculator?

Using our Capital Gain Indexation Calculator is simple and can be completed in four easy steps:

• Step 1: Fill in Purchase Details: Enter the purchase year, cost of acquisition, and any associated purchase expenses.
• Step 2: Enter Sale Details: Fill in the sale year, sale price, and any relevant expenses (like brokerage and remittance charges).
• Step 3: Choose the Type of Asset: Select whether the asset is a property, a mutual fund, or any other type of capital asset.
• Step 4: Click on "Calculate": Our calculator uses the latest CII values to provide your indexed cost and long-term gains quickly.

Sample Calculation

• Purchase Price = ₹20,00,000 (bought in FY 2010-11, CII = 167)
• Sale Price = ₹50,00,000 (sold in FY 2022-23, CII = 331)
  • Indexed Cost = (₹20,00,000 × 331 ÷ 167) = ₹39,64,071
  • LTCG = ₹50,00,000 − ₹39,64,071 = ₹10,35,929

This means you will only be taxed on ₹10.35 lakh instead of the entire ₹30 lakh gain.

What are the Benefits of Using the Savetaxs Capital Gain Indexation Calculator?

Using our tool is not only easy and quick but also provides you with several benefits, such as:

• Helps in financial planning before asset sales
• Provides accurate tax estimates for long-term assets under both the old and new rules
• Automatically applies the Income Tax Act 2025 structure and the latest Union Budget rules
• Compares both tax options (12.5% vs. 20% with indexation) for eligible property transactions
• Simple and free for both individuals and tax professionals
• Saves significant time as compared to traditional calculation methods
• Uses the most up-to-date Cost Inflation Index (CII) — currently 376 for Tax Year 2025-26 — for providing trustworthy outcomes

To Conclude

Using our capital gain indexation calculator allows you to make smarter financial decisions, minimise taxes legally, and strategically time the sale of your assets. With the introduction of the Income Tax Act 2025 and the changes brought in by Union Budget 2024, the rules around indexation have changed significantly — but where indexation still applies (especially for real estate), the savings can be substantial. Whether you are an investor, property owner, or tax advisor, the Savetaxs Capital Gain Indexation Calculator provides a quick and dependable method to estimate your indexed long-term capital gains and choose the most tax-efficient option for Tax Year 2025-26 and beyond.