GST on Under-Construction Flats: What a Bengaluru Buyer Pays

Two buyers looked at near-identical two-bedroom flats in the same Whitefield micro-market on the same weekend. One picked an under-construction unit in a tower still a year from handover; the other chose a ready flat in a completed building next door that already had its completion certificate. The sticker prices were close, and both felt they had negotiated well. Only at the paperwork stage did one of them discover an extra five percent stacked onto the price as goods and services tax, while the other paid none at all. Nothing separated the two flats but their construction stage, and in Bengaluru that stage is what decides whether GST touches your purchase.

The short answer. Buying an under-construction flat in Bengaluru attracts GST, currently five percent of the price for most homes and a concessional one percent for qualifying affordable housing, and in neither case can you claim input tax credit against it. A ready-to-move flat that has already received its completion certificate attracts no GST at all. The trade-off is real: buying ready removes the GST cost but usually means a higher base price and less choice, while an under-construction flat can be cheaper to enter but adds five percent that no credit will ever refund.

Do you pay GST when buying a flat in Bengaluru?

You pay GST only if the flat is under construction when you buy it, not if it is a completed, ready-to-move home. GST is a tax on the supply of construction services, so it applies while the builder is still constructing and selling; once a building is finished and has its completion certificate, a sale of that flat is treated as a transfer of immovable property rather than a construction service, and GST falls away. This is why two physically similar flats can carry very different tax outcomes purely because one is mid-construction and the other is done.

For a buyer, this turns construction stage into a budgeting variable, not just a possession-date question. An under-construction purchase means planning for GST on top of the price, the stamp duty and the registration cost, while a ready flat with its certificate in hand removes the GST line entirely. Knowing which side of that line your flat sits on is the first thing to establish before you compare two options on price alone. On a Rs 80 lakh flat, five percent GST is a full Rs 4 lakh, a sum large enough to change which option is actually cheaper once every cost is counted, so it deserves to sit in the comparison from the start rather than appearing as a line item at signing.

What are the GST rates on an under-construction flat?

The rate is five percent for most under-construction residential flats and one percent for those that qualify as affordable housing, both charged without input tax credit. These are the effective rates that already build in a standard deduction for the land portion of the deal, so you apply them to the price the builder quotes for the flat. The rates have held since the structure was reset in 2019, and they apply uniformly, so a Bengaluru flat is taxed on the same basis as one elsewhere in the country.

Read the table as a map of when the tax bites. The one percent and five percent rates are the ones that matter for a launch-stage or mid-construction booking, while the two no-GST rows are the levers a buyer can use, either by buying a completed home or, for a plot, because the land itself is outside GST. In a large township development such as Prestige City on Sarjapur Road, whether GST applies to your specific unit still comes down to whether that particular tower has received its completion certificate by the time you buy.

What counts as affordable for the one percent rate?

Affordable housing for the concessional one percent rate is defined by both size and price, and a flat has to meet both tests. In a metro such as Bengaluru, the flat must have a carpet area of up to 60 square meters, and its value must be up to Rs 45 lakh; in non-metro locations the size limit is more generous at up to 90 square meters, with the same value ceiling. Miss either condition, by a larger carpet area or a higher price, and the flat is taxed at the standard five percent rather than one percent.

This matters because the label affordable in a brochure is not the same as qualifying for the one percent rate. A flat marketed as budget-friendly can still fall on the five percent side if its carpet area or price crosses the threshold. Check the carpet area on the agreement, not the loosely quoted super built-up figure, because it is the carpet area that the affordable-housing test uses.

Why is there no GST on ready-to-move flats?

There is no GST on a completed flat because, once the building has its completion certificate, selling a unit in it is a transfer of property rather than a supply of construction service. GST is designed to tax the construction activity while it is happening; a finished building whose certificate has been issued is past that point, so its sale sits outside the tax. This is the single cleanest way a buyer can avoid the GST cost, simply by choosing a home that is genuinely complete and certified rather than one still being built.

The practical catch is to confirm that a flat sold as ready truly has its completion certificate, not just finished-looking interiors. A building that looks done but has not received its certificate can still be treated as under construction for tax, so the certificate, not the paint, is what settles the GST question. This is where the distinction between an occupancy certificate and a completion certificate becomes worth understanding, which we cover in our guide to the occupancy certificate and completion certificate.

What is input tax credit and why does it not help you?

Input tax credit is the mechanism that lets a business offset the tax it pays on inputs against the tax it collects, and as a home buyer you do not get it. Since the rate structure was reset in 2019, the concessional one and five percent rates come without input tax credit for residential buyers, which means the GST you pay on an under-construction flat is a straight, final cost with no offset or refund. You cannot reclaim it later, and it does not reduce any other tax you owe.

The reason this matters is that some sales pitches gloss over it, implying the tax is somehow recoverable or notional. It is not. Treat the one or five percent as money that leaves your pocket for good, and fold it into your comparison between an under-construction option and a ready one, where the ready flat may carry no GST at all. Seen that way, a modest headline discount on an under-construction unit can be wiped out by the tax that a completed flat would not attract.

How should you factor GST into your Bengaluru budget?

Work GST into the decision before you fix on a flat, not after you have signed.

1. Establish whether the flat is under construction or ready with a completion certificate already issued.
2. For an under-construction flat, apply five percent GST to the price, or one percent if it qualifies as affordable.
3. Check the carpet area and price against the affordable thresholds before assuming the one percent rate.
4. Treat the GST as a non-recoverable cost, because no input tax credit is available to you.
5. Add GST alongside stamp duty and registration when you compare two flats on total cost.
6. For a flat sold as ready, ask to see the completion certificate that removes GST from the deal.
7. Confirm the final tax with your own adviser for anything unusual about the property or price.

Doing this stops GST from being a late surprise and turns it into a number you weighed from the start. Because it stacks on top of the other statutory costs, pairing this with an early read of your guidance value and stamp duty gives you the full picture of what a Bengaluru purchase really costs beyond the quoted price. Only then can you compare a ready home and an under-construction one on genuinely equal terms.

Frequently asked questions

Do I pay GST on a ready-to-move flat in Bengaluru?

No. A ready-to-move flat that has already received its completion certificate attracts no GST, because its sale is treated as a transfer of property rather than a construction service. GST applies only while a flat is under construction. This is why buying a genuinely completed and certified home is the cleanest way to avoid the GST cost entirely.

What is the GST rate on an under-construction flat?

Most under-construction residential flats are taxed at five percent GST, while flats that qualify as affordable housing are taxed at one percent. Neither rate allows input tax credit to the buyer, so the GST is a final cost. The rates apply to the price the builder quotes and have held since the structure was reset in 2019.

What makes a flat affordable for the one percent GST rate?

A flat qualifies for the one percent rate only if it meets both a size and a price test. In a metro like Bengaluru the carpet area must be up to 60 square meters and the value up to Rs 45 lakh. Crossing either threshold moves the flat to the standard five percent rate.

Can I claim back the GST I pay on my flat?

No. Since 2019, the one and five percent rates for residential buyers come without input tax credit, so the GST you pay is a straight, non-recoverable cost. You cannot reclaim it or set it off against any other tax. Factor it into your budget as money spent for good.

Last updated 2026-09-02. PropNewz Team.