GST on Under-Construction vs Ready-to-Move Property: What's the Difference?

One of the most important and frequently misunderstood aspects of buying property in India is how GST applies. The difference between buying under-construction and ready-to-move can mean lakhs in tax savings — or an unexpected bill if you didn't plan for it.

The Key Trigger: Occupancy Certificate

The determining factor is whether the builder has received the Occupancy Certificate (OC) from the local municipal authority. The OC certifies that the building is fit for habitation and complies with approved building plans.

If you buy a flat before the OC is issued — even if the building is physically complete — it is treated as under-construction for GST purposes. The moment the OC is issued, any subsequent sale attracts zero GST.

How GST Is Calculated on Under-Construction Property

The effective GST rate is 5% for residential properties. However, the government has specified that this is calculated on the agreement value including construction cost, with a notional deduction for land value.

The Affordable Housing Exception (2026)

Affordable housing attracts a GST rate of just 1% (without ITC). As of June 2026, both conditions must be met simultaneously:

• Metro cities (Delhi-NCR, Mumbai-MMR, Bengaluru, Chennai, Hyderabad, Kolkata): Carpet area ≤ 60 sq metres AND value ≤ ₹45 lakh
• Non-metro cities: Carpet area ≤ 90 sq metres AND value ≤ ₹45 lakh

Note: The ₹45 lakh cap has not been revised since 2019 despite rising construction costs. Industry bodies like CREDAI have been lobbying to raise it to ₹80–90 lakh. As of June 2026, the limit remains at ₹45 lakh. A mid-segment flat in most major cities now exceeds this threshold, making the 5% rate the default for most buyers.

What Is GST Applied To?

GST is charged on the construction service component of the transaction, which includes:

• Base price of the flat
• Floor rise charges
• Preferential Location Charges (PLC)

What is typically excluded from the GST base:

• Undivided share of land (treated as exempt supply)
• Separate amenity charges in some project structures
• Stamp duty and registration (these are separate taxes, not subject to GST)

Worked Example

GST 2.0 and Real Estate (2026)

The government introduced GST 2.0 reforms in 2026, which refined compliance rules and expanded the digital tracking portal. For homebuyers, the core rates remain unchanged — 5% for non-affordable and 1% for affordable under-construction properties. The key change is that buyers can now verify a builder's GST registration, tax compliance, and payment status directly on the upgraded GST portal before completing a purchase. This is an important due diligence step.

Can I Claim Input Tax Credit?

As a home buyer (end consumer), you cannot claim Input Tax Credit (ITC) on GST paid on a residential property purchase. ITC is available only to GST-registered businesses that use the property for business purposes.

Prior to 2019, builders could claim ITC on construction materials and services and were required to pass on the benefit to buyers. The current rate structure (5% without ITC) was introduced to simplify compliance and reduce disputes about ITC pass-through.

GST on Resale Property

When you buy a resale flat (second-hand property), GST does not apply at all — regardless of whether the property is under-construction or ready. GST applies only when the builder (original developer) makes the first sale. Once a flat has been sold once, all subsequent transactions are outside the GST net.

Practical Implications for Buyers

If you are comparing an under-construction flat at ₹75 lakh and a ready-to-move flat at ₹78 lakh in the same area, the under-construction one costs approximately ₹3.75 lakh more in GST — bringing the actual difference much closer. Factor in the wait time for possession, construction risk, and the GST delta before deciding.

Summary