Grandfathered Cost Calculator (§112A)
The grandfathering rule for pre-2018 equity — higher-of-cost-or-Jan-31-2018-FMV (capped at sale) as your acquisition cost.
Formula
When LTCG on equity returned in 2018, gains accrued before 31 Jan 2018 were grandfathered — your cost steps up to that day's FMV (capped at sale value so it can't create a loss). This shields years of pre-2018 appreciation from the 12.5% tax; essential for anyone holding equity bought before 2018.
Not tax advice. Not financial advice — for informational and analytical use only. Verify all figures with a qualified professional before acting on them.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Need grandfathered cost calculator results fast? Analysts, founders, traders and finance professionals use the Grandfathered Cost Calculator to skip the spreadsheet and get a defensible answer in one step — free, private and instant.
About Grandfathered Cost Calculator (§112A)
The grandfathering rule for pre-2018 equity — higher-of-cost-or-Jan-31-2018-FMV (capped at sale) as your acquisition cost. When LTCG on equity returned in 2018, gains accrued before 31 Jan 2018 were grandfathered — your cost steps up to that day's FMV (capped at sale value so it can't create a loss). This shields years of pre-2018 appreciation from the 12.5% tax; essential for anyone holding equity bought before 2018. The governing relationship is cost = max(actual cost, min(FMV 31-Jan-18, sale value)). The Grandfathered Cost Calculator computes entirely in your browser — free, private (your figures never leave your device) and instant, recalculating live as you change any input.
How to use Grandfathered Cost Calculator (§112A)
- 1Enter Actual purchase cost (₹), FMV on 31 Jan 2018 (₹), Sale value (₹) into the Grandfathered Cost Calculator.
- 2The result is computed automatically using cost = max(actual cost, min(FMV 31-Jan-18, sale value)) — there is no button to press.
- 3Change any input to model a different scenario, then copy or share the result.
Why use Grandfathered Cost Calculator (§112A)?
- ✓Computes grandfathered cost calculator instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the figures you enter stay private
- ✓Shows the formula, a live worked example and references so you can defend the number
Frequently asked questions
What is the formula behind the Grandfathered Cost Calculator?+
Grandfathered Cost Calculator uses cost = max(actual cost, min(FMV 31-Jan-18, sale value)). When LTCG on equity returned in 2018, gains accrued before 31 Jan 2018 were grandfathered — your cost steps up to that day's FMV (capped at sale value so it can't create a loss). The tool substitutes your actual inputs into this relationship and shows the worked example step by step.
What inputs does the Grandfathered Cost Calculator need?+
Enter Actual purchase cost (₹), FMV on 31 Jan 2018 (₹), Sale value (₹) and the result updates immediately — there is no button to press. Change any value to model a different scenario in real time.
Is the Grandfathered Cost Calculator free, and is my data private?+
Yes — it is completely free with no sign-up or usage limit, and it runs entirely in your browser, so the numbers you enter are never uploaded or stored on any server. Not tax advice. It is for informational and analytical use, not financial advice.
What should I watch out for when using the Grandfathered Cost Calculator?+
This shields years of pre-2018 appreciation from the 12.5% tax; essential for anyone holding equity bought before 2018.
What is the Grandfathered Cost Calculator based on?+
The method follows authoritative sources: Income-tax Act §112A — grandfathering provision. The formula and references are shown on the page so you can verify and cite the result.
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