LTCG & STCG on Property Sale in 2026 — The Post-2024 Indexation Math That Saves or Costs You ₹10 Lakh

The Union Budget of July 2024 quietly did something that no amount of stamp-duty tinkering in the years before had done — it rewrote how Indian homeowners calculate the tax on a property sale. Indexation, the provision that allowed sellers to inflate their purchase cost by the Cost Inflation Index before computing long-term capital gains, was removed for new buys. Older owners were grandfathered. And the rate itself was cut from 20% to a flat 12.5%.

Eighteen months in, the Budget 2026 confirmed that the 2024 regime carries forward unchanged into FY 2026-27. That means every seller today is living inside this split system — and for a surprising number of them, the "old" 20%-with-indexation path still saves more tax than the "new" 12.5%-flat path. Below is the math, the grandfathering rule, and the two reinvestment exemptions every NCR seller should know before they sign a sale deed.

Short-term vs long-term — the 24-month line

The first question to settle on any property sale is the holding period.

• Holding period of 24 months or less — treated as Short-Term Capital Gains (STCG). Taxed at the seller's slab rate, which can go up to 30% plus 4% cess in the top bracket. No reinvestment exemptions apply.
• Holding period over 24 months — treated as Long-Term Capital Gains (LTCG). Taxed under the post-2024 regime explained below.

The 24-month clock runs from the date of registration of the purchase deed, not the date of allotment or the date of first payment. For under-construction flats where possession was taken before registration, the possession letter date is sometimes accepted — get a chartered accountant to confirm your specific facts before filing.

The LTCG regime — 12.5% flat or 20% with indexation

Here is the post-2024 split, confirmed by Budget 2026 to continue unchanged:

Property purchased on or after 23 July 2024

• Single option: 12.5% flat on the gain, without indexation
• Gain = sale consideration minus original cost (adjusted only for transfer-related expenses like brokerage)
• No CII benefit, no inflation adjustment

Property purchased before 23 July 2024 — grandfathered

• Taxpayer can choose the lower of:
  • 12.5% flat without indexation, OR
  • 20% with indexation benefit (using Cost Inflation Index)
• Computed per property, not per portfolio — you can pick different options for different assets in the same year

This is the single most important planning lever for any NCR seller who bought before July 2024. Run the math both ways before you file.

The worked example — where 20%-with-indexation still wins

A concrete case. You bought a Ghaziabad flat in January 2010 for ₹50 L and you are selling it in March 2026 for ₹1.5 Cr.

Option A — 12.5% flat without indexation:

• Gain = ₹1.5 Cr minus ₹50 L = ₹1 Cr
• Tax = 12.5% of ₹1 Cr = ₹12.5 L

Option B — 20% with indexation (CII 2024-25 = 363, CII 2009-10 = 148):

• Indexed cost = ₹50 L × (363 / 148) ≈ ₹1.23 Cr
• Gain = ₹1.5 Cr minus ₹1.23 Cr = ₹27 L
• Tax = 20% of ₹27 L = ₹5.4 L

On this specific example, 20%-with-indexation saves the seller roughly ₹7 L over the 12.5%-flat route. The general rule of thumb: the longer you have held the property and the slower its price growth versus inflation, the more likely indexation wins.

A second example where the flat rate wins — a ₹1 Cr Noida Expressway flat bought in March 2020 for ₹60 L and sold in March 2026 for ₹1.6 Cr:

• Option A: 12.5% on ₹1 Cr gain = ₹12.5 L
• Option B: Indexed cost ≈ ₹60 L × (363 / 301) ≈ ₹72.4 L; gain ≈ ₹87.6 L; tax at 20% = ₹17.5 L

Here the flat rate saves ~₹5 L. Fast appreciation on a short hold tilts the math the other way.

Section 54 — reinvest into a residential property

The most widely used LTCG exemption for homeowners. Key conditions for sales in FY 2026-27:

• Applies only to LTCG from sale of a residential house (not commercial, not plot)
• Seller must reinvest the LTCG (not the full sale value) into one residential property in India
• Reinvestment window: purchase within 2 years of sale (or 1 year before sale), or construction within 3 years of sale
• Cap of ₹10 Cr on the exemption (reintroduced by Finance Act 2023)
• If the new property is sold within 3 years, the Section 54 exemption is clawed back
• Unutilised LTCG can be parked in a Capital Gains Account Scheme (CGAS) with a nationalised bank before the ITR due date

One nuance the Finance Act 2023 added: Section 54 is now available on a second residential property only if the total LTCG in the year does not exceed ₹2 Cr, and that choice can be made only once in a lifetime.

Section 54EC — reinvest into NHAI / REC bonds

For sellers who don't want to buy another property, Section 54EC is the parallel route.

• Invest LTCG up to ₹50 L in NHAI, REC, PFC, or IRFC bonds within 6 months of sale
• Lock-in: 5 years (up from 3 years after Finance Act 2018)
• Interest taxable at slab rate (currently ~5.25%), but the principal exemption typically dwarfs the interest drag
• Cap of ₹50 L applies per financial year across multiple sales

For a seller with a ₹60 L gain, the commonly used split is — park ₹50 L in 54EC bonds and pay tax on the residual ₹10 L. For gains above ₹50 L, 54EC alone isn't enough; pair it with Section 54 if you're buying another house.

TDS on property — the Section 194-IA line

When you sell, the buyer deducts TDS before paying you. The rates for FY 2026-27:

• Seller is resident, property value over ₹50 L: buyer deducts 1% TDS on the full sale consideration (not just the gain), under Section 194-IA of the Income Tax Act
• Seller is NRI (regardless of property value): buyer deducts TDS under Section 195 at 12.5% for LTCG, 30% for STCG, plus applicable surcharge and 4% cess
• NRI sellers can apply for a Lower TDS Certificate under Section 197 to deduct TDS on the gain portion only, rather than the full sale value — a meaningful cashflow saver when the gain is small relative to the sale price

For NRI buyers on the other side, our NRI property purchase guide for Delhi NCR walks through the FEMA and repatriation angles.

Common mistakes — the ₹10 lakh errors

• Not running both LTCG options — owners default to 12.5% because it sounds lower. For long-held NCR properties, 20%-with-indexation often wins by lakhs.
• Treating the full sale value as the gain — the gain is sale price minus (original cost + improvements + transfer expenses + stamp duty on purchase). Keep receipts.
• Missing the 6-month window on 54EC — it's from the date of sale, not the end of the financial year. Tight window; plan during the deal, not after.
• Missing the 2-year / 3-year clock on Section 54 — if you can't close a purchase by the due date, park the money in a CGAS account before ITR filing and buy later.
• Selling the new property within 3 years — Section 54 gets clawed back, and the original LTCG becomes taxable with interest.
• Forgetting Section 56(2)(x) on buyer side — if transaction value is below circle rate by more than 10%, the buyer is deemed to have received income. Circle rate matters twice, once on stamp duty and again here.
• Under-reporting to save stamp duty — also understates the cost for your own eventual LTCG. Pay your stamp duty cleanly; it compounds as a tax shield later.

Red flags on the tax side

• Unregistered or under-valued older sale deed. If you bought a ₹50 L flat and the deed shows ₹30 L, your indexation base is ₹30 L, not ₹50 L.
• Improvement expenses without invoices. Renovations can be added to cost basis only with dated, verifiable evidence.
• Joint ownership confusion. If you bought as joint owners, the gain splits per the funding ratio — not equally by default.
• Power-of-attorney sales. Courts still don't treat POA transfers as registered sales; LTCG treatment is murky and the IT department often reopens these.

The 10-minute pre-sale checklist

• Confirm your holding period (registered date to sale date)
• Pull the Cost Inflation Index for your purchase year and FY 2025-26
• Compute the gain both ways — 12.5% flat and 20%-with-indexation
• Check if Section 54 reinvestment is feasible within 2 / 3 years
• If not, can Section 54EC absorb up to ₹50 L?
• Verify buyer TDS mechanism — especially if you're an NRI seller
• Keep original purchase deed, stamp duty receipts, improvement invoices ready for the CA

If you want to run the LTCG math on your specific holding with both options laid out side by side, or need a clean reinvestment plan across Section 54 and 54EC for a deal closing in FY 2026-27, call us or send a brief. We'll come back with a single-page tax worksheet within 48 hours.

— Team 9 Property Wala