GST on Under-Construction vs Ready Flats: A Bengaluru Buyer Guide

A Bengaluru buyer comparing two similar three bedroom flats in Hebbal, one still under construction and one ready with keys in hand, was puzzled that the finished flat carried no GST while the under construction one added five percent to the bill. It was not a mistake. Under India's goods and services tax rules, GST applies to an under construction flat but not to a completed flat that already has its occupancy certificate. For a large purchase, that single distinction can change the total cost by several lakh rupees, so it is worth understanding before you choose.

The short answer. You pay GST on an under construction flat, at one percent for affordable housing or five percent for other homes, in both cases without input tax credit. A ready to move flat that already has its occupancy certificate carries no GST, because after the OC the sale is of a completed property rather than a construction service. The trade-off: a ready flat avoids GST but often costs more upfront, while an under construction flat may be cheaper on paper yet adds GST and carries construction and delivery risk.

Do you pay GST when buying a flat in Bengaluru?

Whether you pay GST depends entirely on one thing: whether the flat is under construction or already completed with an occupancy certificate. GST is a tax on the supply of construction services, so it attaches to a flat you are buying while it is still being built. Once a building has its occupancy certificate and is sold as a finished home, that sale is treated as a transfer of immovable property rather than a construction service, and no GST applies.

This is why two flats of similar size and price can be taxed so differently. The under construction flat is, in tax terms, the developer supplying you a construction service, which is taxable. The ready flat with an OC is a completed asset changing hands, which sits outside GST. For a Bengaluru buyer, checking the construction status is therefore not just about when you get the keys, it directly affects the tax you pay.

What are the GST rates on an under construction flat?

For an under construction home the rate is one percent for affordable housing and five percent for other residential units, and in both cases the builder cannot pass on input tax credit. These rates were set by the Central Board of Indirect Taxes and Customs through Notification 3 of 2019, effective from 1 April 2019, and the GST Council left residential rates unchanged in its September 2025 revision. So the one percent and five percent structure remains the current position for home buyers.

The phrase without input tax credit matters more than it sounds. It means the concessional one and five percent rates are charged on the price, and the builder does not separately reduce your cost by the tax they paid on cement, steel, and other inputs. That trade was the deal when these lower rates were introduced. For you as a buyer, the practical takeaway is simple: budget the one or five percent on top of the base price of an under construction flat, and confirm the current rate with the official CBIC GST portal or your developer before you sign.

Why is a ready to move flat with an OC GST free?

A ready to move flat with an occupancy certificate is GST free because, by that stage, you are buying a completed property, not a construction service. The occupancy certificate marks the point at which the building is a finished asset. A sale after that is a transfer of immovable property, which falls outside the scope of GST, so no tax is added to the purchase price on that account.

This is a genuine and legal saving, not a loophole, and it is one reason some buyers prefer ready flats. It does come with its own trade-offs, since ready flats are often priced higher and offer less choice of unit than a launch. But if two options are close on price, the absence of GST on the ready one is a real advantage that belongs in your comparison. Just make sure the occupancy certificate genuinely exists, rather than being promised, since that document is what puts the sale outside GST.

A subtle trap sits here for buyers of nearly finished projects. A flat that is almost complete but has not yet received its occupancy certificate is still, in tax terms, under construction, so a purchase at that stage can still attract GST. The tax status turns on the certificate, not on how finished the building looks on the day you visit. If you are buying late in a project's life, ask specifically whether the occupancy certificate has already been issued before you assume the purchase is GST free.

What counts as affordable housing for the one percent rate?

Affordable housing, for the lower one percent rate, is defined by both size and price, and a flat must meet the limits to qualify. The size limit is a carpet area of up to 60 square metres in metropolitan cities and up to 90 square metres in other areas, and the price limit is a value of up to 45 lakh rupees. A unit within these limits attracts one percent, while anything above them falls into the five percent category.

Because the definition turns on carpet area, not the larger super built up area a brochure often quotes, it pays to know the difference. A flat marketed as compact can still exceed the carpet area limit once measured correctly, or fall outside the price cap. Our guide to carpet area versus super built up area explains how these are measured, which is exactly the number that decides whether the one percent rate applies to your purchase.

How does GST compare across purchase types?

Different kinds of property purchase are taxed very differently under GST, and seeing them together makes the pattern clear. The table below sets out the common cases a Bengaluru buyer meets and what to confirm for each.

How does GST change the total cost, and what should you check?

GST changes the total cost most on an under construction flat, so you should fold it into your budget from the start rather than treat it as a surprise at booking. Remember that GST is separate from stamp duty and registration, which apply regardless of construction status. Work through this checklist before you commit.

1. Confirm whether the flat is under construction or ready with a genuine occupancy certificate.
2. If it is under construction, ask whether it qualifies as affordable for the one percent rate.
3. Check the carpet area and price against the affordable limits, not the super built up area.
4. Budget the one or five percent GST on top of the base price for an under construction unit.
5. Remember that a ready flat with an OC carries no GST on the purchase itself.
6. Keep stamp duty and registration in your total, since GST does not replace them.
7. Get the applicable GST in writing on the cost sheet before you pay any booking amount.

If a developer is vague about the GST on your specific unit, treat that as a reason to get it clarified in writing before proceeding.

What should a Bengaluru buyer remember about GST?

The key thing to remember is that GST is a real, separate line in the cost of an under construction flat and disappears once a flat is completed and sold with its occupancy certificate. That single fact should sit alongside price when you compare an under construction launch with a ready home, because the headline price does not tell the whole story. A cheaper under construction flat can end up close to a ready one once GST is added.

At the same time, GST is only one part of your purchase cost. Stamp duty, registration, and other charges apply on top, so build a complete picture rather than fixating on any single tax. Our guide to the cost to register a home in Bengaluru covers those other charges, and reading it alongside this one gives you the full cost of a purchase before you commit.

Frequently asked questions

Is there GST on a ready to move flat in Bengaluru?

No. A ready to move flat that already has its occupancy certificate carries no GST, because the sale is of a completed property rather than a construction service. GST applies only while a flat is under construction. Always confirm that the occupancy certificate genuinely exists, since that document is what places the sale outside GST.

What is the GST rate on an under construction flat?

The rate is one percent for affordable housing and five percent for other residential units, both without input tax credit. These rates were set by CBIC Notification 3 of 2019 from 1 April 2019, and the GST Council left residential rates unchanged in September 2025. Budget this on top of the base price of an under construction flat.

Which flats qualify for the one percent affordable rate?

A flat qualifies as affordable when its carpet area is up to 60 square metres in metropolitan cities or up to 90 square metres elsewhere, and its price is up to 45 lakh rupees. Units within both limits attract one percent GST, while those above fall into the five percent bracket. The measure used is the carpet area.

Does GST replace stamp duty and registration?

No. GST and stamp duty are separate charges. GST applies only to under construction flats, while stamp duty and registration apply to your purchase regardless of construction status, including on ready and resale flats. Budget for both where they apply, and keep GST separate from the stamp duty and registration in your total cost.

Last updated 2026-09-05. PropNewz Team.