GST Rules for Real Estate Developers: Residential vs. Commercial Projects

Real estate is perhaps the most unique sector in the Goods and Services Tax (GST) landscape. Unlike manufacturers who can claim every rupee of credit, real estate developers operate under a "Special Scheme" where tax rates are low, but Input Tax Credits (ITC) are almost entirely blocked.

For businesses and homebuyers, the question is always: "How much GST applies to this flat?" The answer depends on whether the project is residential, commercial, or "affordable," and whether the developer has received a Completion Certificate.

This guide decodes the GST rates, the mandatory 80% procurement rule, and the 2026 compliance standards for real estate developers.

The Two GST Eras in Real Estate

Before 2019, real estate had high tax rates (12%) with full ITC. Since April 1, 2019, a "New Tax Regime" made the rates much lower but abolished ITC for new projects.

1. Residential Projects (The New Rates)

• Affordable Housing: 1% GST (without ITC). This applies to flats costing up to ₹45 Lakhs with a carpet area of 60 sqm (metros) or 90 sqm (non-metros).
• Non-Affordable (Standard) Housing: 5% GST (without ITC). This applies to all other residential apartments.

2. Commercial Projects

• Shops and Offices in a Residential Project: If the commercial area is less than 15% of the total project, it is taxed at 5% (without ITC).
• Standalone Commercial Projects: Shops, malls, and offices are taxed at 12% or 18% (with full ITC).

The "No GST" Rule: Secondary Sales

If you are buying a property, look at the Completion Certificate (CC).

• Under-construction property: GST is applicable at 1%, 5%, or 12%/18%.
• Ready-to-move-in property (Post-CC): No GST is applicable. The sale is considered a "Sale of Land/Building," which falls under Schedule III of the CGST Act and is outside the scope of GST.

The 80% Procurement Rule (Rule 9)

Since developers under the 1%/5% scheme don't get ITC, they have no incentive to buy from registered dealers. To prevent the use of "black money" in construction, the government implemented a strict rule:

Developers must buy at least 80% of their raw materials and services from GST-registered suppliers.

• If they buy only 70% from registered dealers, they must pay 18% GST under Reverse Charge (RCM) on the 10% shortfall.
• Critical Exception: Cement and Capital Goods must always be bought from registered dealers. If bought from unregistered dealers, the developer must pay 28% GST (for cement) or the relevant rate (for machinery) under RCM.

Legal Reference

Relevant Law: Notification No. 11/2017-Central Tax (Rate) as amended by Notification No. 3/2019. Section 17(5) of the CGST Act blocks ITC for construction on own account.

RCM on Joint Development (TDR and FSI)

When a landowner gives their land to a developer in exchange for a share of the flats, it is called a "Joint Development Agreement" (JDA).

• Transfer of Development Rights (TDR) and Floor Space Index (FSI) are taxable services.
• The Process: The liability to pay GST on TDR/FSI is shifted to the Developer under Reverse Charge Mechanism (RCM).
• The Exemption: GST on TDR is exempt to the extent it relates to residential flats that are sold before the completion certificate is issued (because GST has already been paid on those flats by the buyer). Any flats remaining unsold at the time of CC trigger a tax liability on the developer.

Valuation: The 1/3rd Land Abatement

When a developer sells a flat, the price includes both the "Construction Service" and the "Land Value." GST only applies to the service, not the land. To simplify this, the law allows a 1/3rd Abatement (deduction) for land. Example: If a flat sells for ₹90 Lakhs, GST is calculated on only ₹60 Lakhs (2/3rds of the value).

Common Mistakes for Developers

1. Incorrect SAC Selection: Using the standard Works Contract SAC (18%) for a residential project that qualifies for the 5% rate.
2. Missing the 80% Calculation: Accountants often forget to include the GST on Import of Services or RCM payments in the 80% threshold calculation, leading to year-end tax shocks.
3. Improper Reconciliation with RERA: In 2026, the GST department is cross-verifying sales declarations in GSTR-1 against the developer's quarterly filings with the Real Estate Regulatory Authority (RERA). Any discrepancy in "Units Sold" or "Booking Amount" triggers an automated inquiry.

Conclusion

The real estate GST model is designed to be consumer-friendly (low rates) but compliance-heavy (high RCM and tracking). For developers in 2026, the key to profitability is optimizing the "Procurement Mix" to meet the 80% threshold without paying penal RCM rates. For buyers, the simple rule remains: ensure your sale agreement clearly bifurcates the Stamp Duty from the GST to avoid paying "Tax on Tax."