Skip to main content

Plain-English definition

What is Indexation?

Indexation adjusts an asset's acquisition cost using a notified inflation index before calculating a taxable gain where the law permits it.

Reviewed by Kshitij Jain, Principal Officer · SEBI Investment Adviser INA000022172 · Updated 24 October 2026

How Indexation works

It does not change the cash purchase price. It changes the cost used for tax computation, and eligibility depends on asset type, acquisition date and current law.

A rupee example

If a permitted indexed cost rises from ₹5 lakh to ₹7 lakh and sale value is ₹8 lakh, the indexed gain is ₹1 lakh rather than ₹3 lakh.

The example isolates one idea so the arithmetic is visible. Real outcomes can include taxes, fees, cash-flow timing and market movement that the simplified example does not model.

Why it matters for your family

Do not assume an old indexation rule still applies. Verify the asset, dates and current Income Tax provisions before planning a sale.

Questions people ask

What does Indexation mean?
Indexation adjusts an asset's acquisition cost using a notified inflation index before calculating a taxable gain where the law permits it.
Why does Indexation matter for a family?
Do not assume an old indexation rule still applies. Verify the asset, dates and current Income Tax provisions before planning a sale.
Where can I verify information about Indexation?
Start with Income Tax Department, linked on this page, and the current official document for the product or tax year involved.

This page is general education, not personalised investment or tax advice. Rules can change; verify current official documents before acting. Investment in securities markets is subject to market risk.