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GST Basics for Builders: A Simplified Guide to Input Tax Credit (ITC) on Construction Materials & Services

GST Basics for Builders: A Simplified Guide to Input Tax Credit (ITC) on Construction Materials & Services
Author: Priyansh Sharma 08 Jul 2025

For builders and real estate developers in India, navigating the Goods and Services Tax (GST) regime can feel like constructing a complex skyscraper. One of the most crucial elements, and often a source of confusion, is Input Tax Credit (ITC). Understanding ITC is key to optimizing costs, ensuring compliance, and ultimately, boosting profitability.

This guide simplifies the essentials of ITC for construction businesses, helping you lay a strong foundation for your GST compliance.

 

What is Input Tax Credit (ITC) in GST?

Imagine you're building a house. You purchase cement, steel, bricks, and hire various services like plumbing, electrical work, and architectural design. You pay GST on each of these purchases. Input Tax Credit (ITC) essentially allows you to reduce your final GST liability on the sale of the constructed property by claiming a credit for the GST you've already paid on these inputs (materials and services).

In simpler terms, it prevents the "tax on tax" or cascading effect, ensuring that GST is levied only on the value added at each stage of the supply chain.

 

How ITC Works for Builders: The Core Principle

Under the GST framework, a property that is "under construction" and intended for sale is generally considered a "supply of service" (specifically, a "works contract"). When you, as a builder, sell an under-construction property, you charge GST to the buyer. To arrive at the net GST payable to the government, you can typically offset the GST you paid on the goods and services used in its construction.

Example:

  • You purchase cement worth ₹1,00,000 and pay 28% GST, i.e., ₹28,000.

  • You purchase steel worth ₹50,000 and pay 18% GST, i.e., ₹9,000.

  • You pay for architectural services worth ₹20,000 and pay 18% GST, i.e., ₹3,600.

  • Total ITC potentially available = ₹28,000 + ₹9,000 + ₹3,600 = ₹40,600.

If you then sell an apartment for which these inputs were used and charge ₹5,00,000 as GST to the buyer, your net GST payable to the government would be ₹5,00,000 - ₹40,600 = ₹4,59,400 (this is a simplified example and does not account for specific rates and restrictions discussed below).

 

Key Restrictions & Nuances on ITC for Builders

While the concept of ITC is straightforward, its application in the construction sector comes with specific restrictions that every builder must be aware of:

1. Residential Properties (Post-April 1, 2019): A Major Shift

This is perhaps the most critical point for residential builders. With effect from April 1, 2019, the GST Council introduced new, reduced rates for residential properties, but without the benefit of ITC.

  • Affordable Residential Housing: 1% GST (without ITC)

    • Definition: Generally, units up to ₹45 lakhs with a carpet area of 60 sq. meters in metropolitan areas (Chennai, Delhi NCR, Kolkata, Mumbai, Hyderabad, Bengaluru) or 90 sq. meters in non-metropolitan cities.

  • Other Residential Properties (Non-Affordable): 5% GST (without ITC)

What this means for you: If your residential project falls under these new rates (which is compulsory for projects commenced on or after April 1, 2019), you cannot claim ITC on the inputs (materials and services) used in their construction. This shifts the GST burden onto your project costs directly.

For ongoing projects as of March 31, 2019, promoters had the option to continue with the old scheme (where ITC was generally available) or shift to the new scheme.

2. Commercial Properties: ITC is Generally Available

For commercial properties (shops, offices, malls, etc.), GST is typically charged at 12% with the benefit of ITC. This allows developers of purely commercial projects to claim ITC on inputs used for construction, provided the property is sold before the issuance of the completion certificate or first occupation.

  • Exception: If commercial apartments are part of a Residential Real Estate Project (RREP), they also attract a 5% GST rate without ITC, similar to residential units within that RREP.

3. "Works Contract" Services & Immovable Property (Section 17(5)(c) & (d) of CGST Act)

This section is particularly important:

  • Section 17(5)(c): ITC is not available on works contract services received by a taxable person for the construction of an immovable property (other than plant and machinery), unless it's an input service for further supply of works contract service.

    • Simply put: If you hire a sub-contractor to do specific works (e.g., masonry, tiling), and your main business is also providing works contract services (i.e., you are a main contractor to a larger developer), you can claim ITC on the sub-contractor's invoice. However, if you are the ultimate recipient building your own office, you cannot.

  • Section 17(5)(d): ITC is not available on goods or services received by a taxable person for the construction of an immovable property (other than plant and machinery) on his own account, even if used in the course or furtherance of business.

    • Simply put: If you, as a builder, construct an office building for your own use (not for sale), you cannot claim ITC on the materials (cement, steel, etc.) or services (architectural, interior design) used for that construction. The only exception here is for "plant and machinery" which, by definition, is often embedded in or attached to the immovable property but is not integral to the building itself (e.g., a furnace in a factory).

4. Completed Properties (Occupancy Certificate Issued): No GST

Once a property receives its Completion Certificate (CC) or Occupancy Certificate (OC), its sale is considered a "sale of immovable property" and falls outside the ambit of GST. This means:

  • No GST is applicable on the sale.

  • Consequently, no ITC can be claimed on any inputs related to such properties.

5. 80% Procurement Rule (for Residential Projects under New Rates)

For residential projects opting for the 1% or 5% GST rates (without ITC), there's a crucial compliance requirement: promoters must procure at least 80% of the value of input and input services (excluding development rights, long-term lease, electricity) from registered suppliers. If this threshold is not met, GST at 18% on the shortfall must be paid under reverse charge. Cement purchased from unregistered suppliers, specifically, attracts 28% GST under reverse charge.

 

Practical Tips for Builders Regarding ITC:

  1. Understand Your Project Type: Clearly identify whether your project is residential (affordable or non-affordable), commercial, or a mix. This dictates your GST rate and ITC eligibility.

  2. Maintain Meticulous Records: Proper documentation (tax invoices, debit notes, etc.) is the backbone of any ITC claim. Ensure all supplier invoices are GST-compliant and accurately reflect your GSTIN.
  3. Regularly Reconcile GSTR-2B: Your GSTR-2B statement automatically reflects the ITC available to you based on your suppliers' filings. Regularly reconcile this with your purchase records to identify discrepancies and ensure your suppliers are complying.
  4. Know Your Blocked Credits: Be acutely aware of Section 17(5) and the specific goods and services on which ITC is restricted in the construction sector. Claiming ineligible ITC can lead to significant penalties and interest.
  5. Separate Accounts for Projects: If you have a mix of residential (new scheme, no ITC) and commercial (with ITC) projects, maintain separate books of accounts to accurately track and manage ITC.

  6. Engage with Suppliers: Ensure your suppliers are GST registered and promptly file their returns so that ITC flows seamlessly to you.