Two buyers in Electronic City in 2026 compared what looked like the same flat at the same price, one still under construction and one ready to move with its completion certificate in hand. The ready flat quietly worked out cheaper, because the under construction one carried five percent GST on top of the price while the completed one carried none. That single tax line, often overlooked in the excitement of a new launch, can add several lakh rupees to a purchase. Understanding when GST applies, and when it does not, is one of the simplest ways for a Bangalore buyer to avoid a nasty surprise.

The short answer. GST applies to under construction flats, at five percent for regular homes and one percent for those that qualify as affordable, in both cases without input tax credit for the buyer. A ready to move flat that already has its completion or occupancy certificate carries no GST, because it is treated as a completed property rather than a construction service, and a resale flat carries no GST either. The trade off is real money: buying under construction can mean paying five percent extra in tax that a ready flat avoids. So factor GST into your comparison, and confirm the current rates on the official tax portal before you commit.

What is the GST rate on an under construction flat?

An under construction flat attracts GST at five percent for a regular home and one percent for a flat that qualifies as affordable, and in both cases the buyer cannot claim input tax credit. This structure has been stable since 2019, and it applies because an under construction sale is treated as a supply of construction services. The five percent or one percent is charged on the value of the flat and is payable in addition to the price, so it needs to sit in your budget alongside stamp duty and registration. Because the buyer gets no input tax credit, the GST is a straight cost rather than something you recover later. The table below summarises the main scenarios, drawn from a public GST on flat purchase guide, and you should confirm the current rates on the official tax portal.

Is there GST on a ready to move flat?

No, a ready to move flat that already holds a valid completion or occupancy certificate does not attract GST. The reason is that once a building is complete and certified, selling a flat in it is treated as the sale of a finished property, not the supply of a construction service, and it therefore falls outside GST. This is a genuine and often underappreciated advantage of buying a completed home, because it removes an entire tax line from your cost. It also links directly to the occupancy certificate: the certificate is not just a compliance document but the very thing that marks the property as completed for this purpose. For a buyer comparing an under construction flat with a ready one, the GST difference should be part of the price comparison, not an afterthought. It is worth being precise about timing here, because the exemption depends on the certificate existing at the point of sale. A flat sold while the building is still awaiting its completion certificate is an under construction sale and carries GST, even if the tower looks physically finished from the outside. Conversely, once the certificate is in place, subsequent sales in that building are outside GST. So the paperwork, not the visible state of the walls, decides whether the tax applies.

What counts as affordable housing for the one percent rate?

Affordable housing for the lower one percent rate is defined by both a price limit and a size limit, and a flat must meet both to qualify. The commonly applied test is a value of up to forty five lakh rupees together with a carpet area within a prescribed limit, which is smaller in the major metros and larger elsewhere. Bangalore is treated as a metro for this purpose, so the carpet area limit that applies here is the metro figure. Because both the price and the area conditions must be satisfied, a flat priced within the limit but larger than the area cap does not get the one percent rate, and neither does a smaller flat priced above the value cap. If a developer describes a flat as affordable for GST, ask which limits it meets and confirm the current thresholds on the official portal.

Can buyers claim input tax credit on a flat purchase?

No, since 2019 residential buyers cannot claim input tax credit on a flat purchase, so the GST you pay on an under construction home is a final cost. Input tax credit is a mechanism that lets a business offset the tax it pays on inputs against the tax it collects, but under the current structure that benefit is not passed through to the individual buyer of a residential flat. For you this means the five percent or one percent is simply added to your cost with nothing to recover, which is another reason the GST on an under construction flat deserves a clear line in your budget. Do not assume any GST is refundable or creditable to you as a homebuyer, and treat it as part of the true price of an under construction home.

How should GST shape your buying decision?

Use GST as one honest input into the comparison between an under construction and a ready flat, alongside price, timeline, and risk. An under construction flat may be cheaper on the headline price and offer a payment schedule spread over the build, but it carries GST and the risk of delay, while a ready flat costs no GST and lets you see exactly what you are buying, often at a higher sticker price. Neither is automatically the better choice, because the right answer depends on your budget, your timeline, and your appetite for construction risk. The point is to compare like with like by including GST, stamp duty, and registration in both cases, so that the true all in cost, not the marketing price, drives your decision.

How does GST fit with your other costs?

GST is one of several statutory costs that sit on top of the base price of a home, and a complete budget accounts for all of them together. For an under construction flat you should plan for GST at the applicable rate, stamp duty and registration at the time of the sale deed, and any one time charges the builder levies. For a ready or resale flat you drop the GST line but still budget for stamp duty and registration. Laying these out side by side stops you from comparing an under construction price that excludes GST against a ready price that includes everything, which is a common way buyers mislead themselves. A clear cost sheet that separates price from taxes is the simplest defence against that error. Ask each developer or seller to give you a written breakup that shows the base price, the GST if any, and the expected stamp duty and registration separately, so you are always comparing the same total across options rather than mixing tax inclusive and tax exclusive figures.

A seven step GST check for buyers

Work through these before you finalise your purchase.

1. Establish whether the flat is under construction, ready to move, or a resale.
2. For an under construction flat, confirm whether the regular or affordable rate applies.
3. Check whether the flat meets both the price and the area limits for the affordable rate.
4. For a ready flat, confirm it holds a valid completion or occupancy certificate.
5. Add the applicable GST to your budget as a cost you cannot recover.
6. Compare under construction and ready options on their true all in cost.
7. Confirm the current GST rates and definitions on the official tax portal.

GST is one line in your total cost, so read it with the rest of your budget. Our guide on the occupancy certificate versus the completion certificate explains the very document that makes a ready flat GST free, and our guide to stamp duty and registration charges for flats in Bangalore covers the other statutory costs. You can apply this budgeting to a live launch such as Goyal Orchid South Park at Electronic City.

Frequently asked questions

What is the GST rate on an under construction flat?

An under construction flat attracts GST at five percent for a regular home and one percent for an affordable flat, in both cases without input tax credit. The tax is charged on the value and is payable in addition to the price, so budget for it. Confirm the current rates on the official tax portal before you commit.

Is there GST on a ready to move flat?

No, a ready to move flat that holds a valid completion or occupancy certificate does not attract GST, since it counts as a finished property. A resale flat carries no GST either. This is a real advantage of a completed home, so include the GST difference when you compare a ready flat with an under construction one.

What counts as affordable housing for the one percent rate?

Affordable housing for the one percent rate is defined by both a price limit and a carpet area limit. The common test is a value up to forty five lakh rupees and an area within a prescribed cap, smaller in metros like Bangalore. A flat that fails either condition does not get the one percent rate.

Can buyers claim input tax credit on a flat purchase?

No, since 2019 residential buyers cannot claim input tax credit, so the GST on an under construction home is a final cost. Input tax credit lets a business offset tax on inputs, but that benefit is not passed through to the buyer. Treat the GST as part of the true price of an under construction home.

Last updated 2026-07-18. PropNewz Team.