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Income TaxJune 2026 · 10 min read

LTCG on Flat Sale: Tax Rates, Indexation & Section 54 Exemption

Selling a flat, house, or plot? Here is everything you need to know about Long Term Capital Gain tax — the new 12.5% vs 20% choice, CII indexation, and how to legally reduce or eliminate your tax liability using Section 54 and 54EC.

1. What Qualifies as Long Term Capital Gain on Property?

For immovable property (house, flat, plot, commercial property), the holding period for LTCG treatment was reduced from 36 months to 24 months by Finance Act 2024, effective from 23 July 2024. If you held the property for 24 months or more before selling, the gain is treated as LTCG. If held for less than 24 months, it is STCG — taxed at your normal slab rate.

Quick Check: Is Your Gain LTCG?
Held property for 24+ months → LTCG (taxed at lower, flat rate)
Held for less than 24 months → STCG (added to total income, taxed at slab rate)

2. LTCG Tax Rates on Property — Post Finance Act 2024

The Finance Act 2024 (Budget July 23, 2024) introduced a major change. The tax rate on LTCG from immovable property changed from 20% (with indexation) to 12.5% (without indexation). However, a grandfathering provision was added for properties acquired before July 23, 2024.

Acquisition DateOption AvailableTax Rate
Before July 23, 2024Option A: Without Indexation12.5%
Option B: With CII Indexation20%
On or After July 23, 2024Without Indexation only12.5%
💡 Which option should you choose (pre-July 23, 2024 property)?

Compare both: compute LTCG with indexation (taxed @20%) and without indexation (taxed @12.5%). Choose whichever gives a lower final tax amount. For properties purchased long ago (e.g., before 2010), indexation typically reduces the gain significantly and the 20% option often wins. For recently acquired properties (e.g., post-2018), 12.5% without indexation may be better. Use our free LTCG Property Calculator to compare both options instantly.

3. How CII Indexation Works

Cost Inflation Index (CII) is a number published by CBDT each year (base year 2001-02 = 100). Indexation adjusts your purchase cost upward for inflation, reducing the taxable LTCG.

Indexed Cost Formula
Indexed Cost = Purchase Price × (CII of Sale Year / CII of Purchase Year)

Example: Flat bought in FY 2010-11 for ₹30L. Sold in FY 2025-26.
Indexed Cost = ₹30L × (380 / 167) = ₹68.26L
LTCG (if sold at ₹1 Cr) = ₹1 Cr − ₹68.26L = ₹31.74L
Tax @20% = ₹6.35L (compare with 12.5% on ₹70L without indexation = ₹8.75L)

The CII table from 2001-02 to 2025-26 is available in our LTCG Calculator.

4. Section 54 Exemption — Reinvest in New Residential Property

Section 54 is the most widely used LTCG exemption. If you sell a residential property and reinvest the LTCG amount in a new residential property in India, the reinvested amount is exempt from tax.

Who can claim?
Individual and HUF taxpayers (not companies or firms)
What asset must be sold?
A residential house property (building, flat, or land appurtenant to a building)
Time to buy new house
Purchase: 1 year before sale or 2 years after sale date. Construction: within 3 years after sale date.
How much is exempt?
The lower of: (a) LTCG amount or (b) cost of new house. If LTCG = ₹50L and new house costs ₹40L → only ₹40L is exempt.
LTCG ≤ ₹2 Crore?
If LTCG is ₹2 crore or less, you can invest in TWO residential houses — but only ONCE in a lifetime.
Lock-in period?
New house must not be transferred within 3 years of purchase/construction. If sold earlier, the exemption is withdrawn.

5. Capital Gains Account Scheme (CGAS) — Don't Lose Your Exemption

If the sale happens before your ITR due date (31 July for non-audit, 31 Oct for audit cases) but you have not yet purchased or constructed the new property, you must deposit the unutilised LTCG amount in a Capital Gains Account Scheme (CGAS) at an authorised bank before the ITR filing deadline.

Important: If you do not deposit in CGAS before the ITR due date AND have not invested in a new property, the LTCG becomes fully taxable in that year. The CGAS deposit preserves the exemption while you finalise the new property purchase.

6. Section 54EC — Invest in NHAI / REC Bonds

If you don't want to buy another property, Section 54EC allows you to invest LTCG in specified bonds (NHAI — National Highways Authority of India, and REC — Rural Electrification Corporation) to claim exemption.

Maximum investment
₹50 lakh per Financial Year
Time to invest
Within 6 months from date of sale
Lock-in period
5 years (redemption before = exemption withdrawn)
Tax on interest earned
Taxable as per slab rate (not capital gains)
Can claim with Sec 54?
Yes — both Sec 54 and 54EC can be claimed together
Available for
Individuals, HUFs, Companies, Firms, LLPs

7. Practical Example — Flat Sold for ₹1.2 Crore

Scenario
Flat purchased in FY 2012-13 for ₹35 lakh (CII: 200). Sold in FY 2025-26 for ₹1.2 crore (CII: 380, est.).
New flat purchased for ₹55 lakh within 2 years. ₹10 lakh invested in 54EC bonds.
Without indexation (12.5%)
LTCG = ₹1.2Cr − ₹35L = ₹85L. Less: Sec 54 (₹55L) + 54EC (₹10L) = ₹65L. Taxable = ₹20L. Tax = ₹2.5L + cess
With indexation (20%)
Indexed cost = ₹35L × (380/200) = ₹66.5L. LTCG = ₹1.2Cr − ₹66.5L = ₹53.5L. Less: Sec 54 (₹53.5L). Taxable = ₹0. Tax = ₹0
Better option
20% with indexation — ZERO tax after Section 54 exemption

Selling a property? Let us handle your LTCG computation.

We specialise in LTCG on property sale — including CII indexation, Sec 54/54EC tax planning, CGAS deposits, and accurate ITR filing for capital gains. First consultation is free.

Disclaimer: This guide is for general informational purposes only. Tax laws are subject to change. Always consult a qualified Chartered Accountant for your specific situation before making tax decisions. © 2026 Associate Piyush, Pune.