GST Rules on Under-Construction Apartments Explained

GST on under-construction apartments is usually charged at 5% when you buy a home before

the completion certificate or first occupation. Eligible affordable homes carry a lower GST rate of 1%. GST is not applicable on a completed home when the full payment is made after receiving the completion certificate or first occupation. Before signing an agreement, verify the GST rate, payment plan, and latest tax rules with the developer. For instance, if you are looking at Brigade Innovation Gardens, a pre-launch 75-acre township at Devanahalli KIADB Phase II in North Bengaluru offering 1 BHK to 4 BHK units, calculating the 5% GST on your construction installments will help you budget your total investment accurately.

What Is GST on an Under-Construction Apartment?

GST on an under-construction flat is a tax on building services provided by developers during construction.When you buy a home before it is built, the law treats the builder as a service provider. Therefore, GST applies to the property price fixed in your payment schedule.

What Is the GST Rate on Under-Construction Flats?

The GST rate on under-construction flats is 5% for standard homes and 1% for qualifying affordable housing.

Standard Flats: Taxed at 5% GST without Input Tax Credit (ITC).
Affordable Flats: Taxed at 1% GST without ITC if the unit meets price and size limits.

When Is GST Charged on a Flat?

GST is charged on a flat whenever you pay the builder before the project gets an official Completion Certificate (CC). Builders collect this tax in parts alongside your construction installment plan. Once a building gets its completion certificate, new buyers pay zero GST.

Is GST Applicable on a Ready-to-Move-In Apartment?

GST does not apply to ready-to-move-in flats if you pay the entire cost after the builder gets a Completion Certificate.

Under-Construction Flat: Subject to 5% or 1% GST.
Ready Flat (Post-CC): Subject to 0% GST.

Buying a completed home removes the GST expense from your final bill.

How Is GST Calculated on an Under-Construction Apartment?

GST is calculated by multiplying the base agreement value of your flat by the applicable tax rate.

If an under-construction flat has a base price of ₹1 Crore, the quick tax calculation looks like this:

Base Flat Price: ₹1,00,00,000
GST Rate (5%): ₹5,00,000
Total Payable Amount: ₹1,05,00,000

Does GST Apply to the Booking Amount?

Yes, GST applies to the initial booking deposit or Expression of Interest (EOI) amount paid for an under-construction flat.

Because booking payments form part of the total flat cost, developers add the applicable GST rate to this initial payment.

GST Payment Schedule for Under-Construction Apartments

GST is collected step-by-step with your construction-linked plan rather than in one huge lump sum.

Your builder sends installment bills at major construction stages, listing base fees and GST separately:

Booking Stage: GST is applied to the initial booking fee.
Slab Stage: GST is applied to structural building milestones.
Possession Stage: GST is applied to final handover dues.

Does GST Apply to Maintenance Charges?

GST applies to monthly society maintenance charges only if your bill exceeds ₹7,500 per month.

Up to ₹7,500 Monthly: Fully exempt from GST.
Above ₹7,500 Monthly: Attracts 18% GST on the total maintenance amount.

Is GST Included in the Property Price?

No, property ads usually show the base rate and exclude GST, stamp duty, and registration charges. Developers show base rates in marketing ads, so buyers must ask for a full cost sheet to see all extra taxes clearly.

GST and Other Charges on an Apartment Purchase

GST applies to building costs, but other government fees follow separate state tax rules during a flat purchase.

Base Flat Cost: Attracts 5% GST (1% for affordable flats).
Stamp Duty & Registration: State taxes calculated separately without GST.
Monthly Maintenance: Attracts 18% GST if over ₹7,500 monthly.

Example: GST on a Luxury Under-Construction Apartment

Calculating tax on a luxury residence helps buyers understand overall acquisition costs early.

Consider a 3 BHK apartment at Brigade Innovation Gardens in North Bengaluru with an estimated base agreement price of ₹1.20 Crore:

Base Flat Value: ₹1,20,00,000
GST @ 5%: ₹6,00,000
Subtotal Cost: ₹1,26,00,000

Project Overview: Brigade Innovation Gardens

Location: Haraluru and Muddenahalli, Devanahalli KIADB Phase II, North Bengaluru.
Land & Structure: 75 acres, 16 residential towers (up to G+30 floors, maximum 35 floors), totaling 7,195 homes.
Home Sizes: 1 BHK (610 sq. ft.), 2 BHK, 3 BHK, and 4 BHK (up to 2,550 sq. ft. super built-up area).
Important Dates: Pre-launch date is planned for 16 October 2026, Launch date on 17 December 2026, Completion on 30 December 2030, and Possession on 10 January 2031.
RERA Status: Karnataka RERA registration is currently awaited; pending official portal publication.

GST on Affordable Housing

Affordable housing can qualify for a lower 1% GST rate if it meets the set government rules. This lower rate helps reduce the tax cost for eligible homebuyers.

To qualify for the 1% GST rate, the home must meet these limits:

Metro Cities: The carpet area must be up to 60 sq. metres, and the home price must be up to ₹45 lakh.
Non-Metro Cities: The carpet area must be up to 90 sq. metres, and the home price must be up to ₹45 lakh.

Does GST Apply to the Land Portion?

GST does not apply separately to the land value of an under-construction apartment project.

Tax rules automatically deduct 1/3rd of the total property value toward land cost. The 5% GST rate applies directly to the final combined property price.

Can Homebuyers Claim GST Paid on an Apartment?

No, individual homebuyers cannot claim back or deduct the GST paid on a residential flat purchase.

The reduced 1% and 5% GST rates are set up without Input Tax Credit for end buyers, making the tax a final purchase cost.

What Should Buyers Check Before Paying GST?

Check CC Status: Check if the project has received its Completion Certificate (CC) before you buy.
Verify Builder GSTIN: Check the builder’s GSTIN on the official bill or tax document.
Ask for a Cost Sheet: Get a clear cost sheet from the builder. It should show the base price, GST, and other state charges separately.

Common Mistakes Buyers Make

Looking Only at Advertised Prices: Forgetting that base prices exclude GST and registration fees.
Paying GST on Ready Flats: Paying tax on ready homes that already have a Completion Certificate.
Skipping Milestone Reviews: Failing to check tax line items on individual construction bills.

Key Takeaways

Standard GST Rates: Under-construction flats carry 5% GST, while eligible affordable homes carry 1% GST.
Ready Flat Exemption: Completed homes with a Completion Certificate are completely free from GST.
Budget Planning: Buyers looking at township projects like Brigade Innovation Gardens should add 5% GST to their base property cost when planning payments.