Why an Under-Construction Flat Adds 5% GST and a Ready Home Does Not, A Bengaluru Buyer's Cost Guide

Two flats on the same street can carry very different tax bills, and many Bengaluru buyers only discover this after they have fallen for one. An under-construction home attracts GST; a ready home with an occupancy certificate does not. In a year when construction costs are climbing and developers are seeking timeline relief, that difference, 5 percent on a non-affordable under-construction flat, can quietly decide which home is actually cheaper.

The short answer. Under-construction homes attract 5 percent GST, or 1 percent for affordable housing, both without input tax credit, while ready homes that have received an occupancy certificate attract none. GST can swing the true cost of an under-construction flat by lakhs. The honest trade-off: an under-construction discount can be wiped out by 5 percent GST plus escalation risk, so a ready home, though more expensive upfront, can be cheaper on a total, risk-adjusted basis in a rising-cost market. Always compare total cost, not sticker price.

When does GST apply to a home purchase?

GST applies to the purchase of an under-construction property, because in tax terms you are buying a construction service, not yet a completed building. Once a project receives its occupancy certificate and is sold as a ready home, the transaction is treated as the sale of immovable property, which falls outside GST. So the dividing line is the occupancy certificate: before it, GST applies; after it, it does not. This single distinction is the foundation of the cost difference between under-construction and ready homes.

What are the 5 percent and 1 percent rates?

For under-construction homes, the GST rate is 5 percent for non-affordable housing and 1 percent for affordable housing, in both cases without input tax credit, meaning the developer cannot pass on credits for the tax paid on inputs to reduce your rate. The practical effect is that on a non-affordable under-construction flat, you add 5 percent to the cost of the home. Verify the prevailing rates against current CBIC and GST Council notifications, since rates and conditions can be revised.

What counts as affordable for the 1 percent rate?

Affordable housing, for the purpose of the 1 percent rate, is defined by limits on carpet area and price under the GST framework, with the thresholds differing between metropolitan and non-metropolitan locations. A home that satisfies both the area and the price conditions qualifies for the lower rate; one that exceeds either falls under the 5 percent rate. Because the precise limits determine a material difference in your tax, confirm the current definition against CBIC notifications rather than relying on a developer's classification.

Why does a ready home attract no GST?

A completed home that has received its occupancy certificate is, in tax terms, immovable property, and the sale of immovable property is outside the scope of GST. There is no construction service being supplied to you at that point, because the construction is finished. This is why a ready home, and equally a resale home, carries no GST, while an under-construction home does. For a buyer, it means the headline price of a ready home already reflects the full tax position, with nothing further to add.

How does GST change the buy-vs-wait math?

It can change it decisively. An under-construction flat often advertises a lower price than a comparable ready home, but once you add 5 percent GST and account for the risk of price escalation and a longer wait, the gap narrows or disappears. A ready home costs more upfront but carries no GST, no delivery risk and no waiting, which in a rising-cost environment can make it cheaper on a total, risk-adjusted basis. The honest comparison is always total cost, including GST, not the sticker price alone.

Does the developer's input credit affect my price?

Under the current structure, the 5 percent and 1 percent rates apply without input tax credit, which means the developer cannot offset the GST paid on construction inputs against your liability to lower your effective rate. In practice, input costs feed into the base price the developer sets rather than into a reduced GST rate for you. A buyer should therefore focus on the all-in price plus the applicable GST, and not expect a developer's input position to translate into a discount on the tax you pay.

What to verify before signing?

Confirm the occupancy-certificate status in writing, since it determines whether GST applies at all. Check the GST rate and whether the home qualifies as affordable, compute the GST on the full price, and compare the total cost of the ready and under-construction options side by side. Check the price-escalation clause, and confirm the tax invoice and the developer's GSTIN. These checks ensure the tax position is clear before you commit, not discovered afterward.

A 7-point checklist for GST on a Bengaluru purchase

1. Confirm the occupancy-certificate status in writing.
2. Check GST applicability and the exact rate.
3. Verify whether the home meets affordable criteria.
4. Compute the GST on the full price.
5. Compare ready versus under-construction total cost.
6. Check the price-escalation clause.
7. Confirm the tax invoice and the developer's GSTIN.

Frequently asked questions

When does GST apply to a home purchase?

GST applies only to under-construction homes, at 5 percent for non-affordable housing and 1 percent for affordable housing, both without input tax credit. A ready home that has received its occupancy certificate attracts no GST at all, which is one of the clearest cost differences between the two.

What counts as affordable for the 1 percent rate?

Affordable housing is defined by carpet-area and price limits set by the GST framework, with different thresholds for metro and non-metro areas. If a home meets those criteria, the 1 percent rate applies; if not, it falls under 5 percent. Confirm the exact current limits against CBIC notifications before assuming the lower rate.

Why does a ready home attract no GST?

Because GST is levied on under-construction property as a supply of construction service, whereas a completed home with an occupancy certificate is treated as immovable property, which is outside GST. So buying ready, or resale, means no GST, while buying under-construction adds 5 percent or 1 percent to your cost.

What should I verify before signing?

Confirm the occupancy-certificate status in writing, check GST applicability and the rate, and verify whether the home meets affordable criteria. Compute the GST on the full price, compare the total cost of a ready versus under-construction option, check the escalation clause, and confirm the invoice and the developer's GSTIN.

Last updated 2 June 2026. PropNewz Team.