Short answer: Buy ready-to-move if you need the home within a year, cannot afford rent and EMI together, or want zero construction risk. Buy under-construction if you can wait 3 to 5 years, want a lower entry price and more choice of units, and the project is RERA registered with a builder who has delivered on time before.
Last reviewed: October 2026.
The quick comparison
| Factor | Ready-to-move | Under-construction |
|---|---|---|
| Price | Usually higher per sq ft | Usually lower at launch |
| GST | Nil once OC is received | 5% (1% for affordable housing) |
| Move-in | Immediate | Typically 3 to 5 years |
| Rent while waiting | None | You may pay rent and loan interest together |
| What you see | The actual flat, light, view, neighbours | Brochure, show flat and floor plans |
| Delay risk | None | Real, even with good builders |
| Unit choice | Limited to what is left | Wider choice of floor, facing and size |
| Payment | Mostly upfront | Spread over construction stages |
When ready-to-move makes more sense
You are paying high rent today. In Bangalore, many families pay rent while also paying pre-EMI or EMI on an under-construction flat. Over three or four years, that double outgo can wipe out the launch discount.
You want certainty. You can check the actual carpet area, water supply, power backup, the view, the light at different times of day, and who your neighbours are. Nothing is a promise on paper.
You want to avoid GST. A flat with an Occupancy Certificate (OC) attracts no GST. On a Rs 1 crore flat, that alone saves about Rs 5 lakh compared with an under-construction purchase.
What to watch for: confirm the OC is actually issued, not "applied for". Also check how old the building is, what repairs are pending, and whether the association is formed and the maintenance accounts are clean.
When under-construction makes more sense
You can wait. If you are living with family or your rent is low, a 3 to 5 year wait costs you less.
You want a lower entry price. Launch prices are often lower than prices at completion. But this is not guaranteed, and it depends on the market and the builder. Do not buy only expecting the price to rise.
You want a specific unit. Early buyers get the best choice of floor, facing (for example, east-facing) and layout.
You prefer staged payments. Your payments, or your bank's disbursements, follow construction milestones rather than one large amount.
What to watch for: delay risk is real. Read the possession date in your agreement, not just in the brochure. Check the builder's delivery record on past projects to see how late they were.
Your protection under RERA
The RERA Act, 2016 protects under-construction buyers in a few important ways:
- The project must be registered with Karnataka RERA before it can be advertised or sold. You can check this yourself on the Karnataka RERA portal. Our step-by-step guide shows how: how to check RERA registration in Karnataka.
- The builder cannot take more than 10% of the price before signing a registered agreement for sale.
- If possession is delayed beyond the agreed date, you can withdraw with a refund plus interest, or stay and get interest for each month of delay.
- Area must be sold on carpet area, so you know exactly what you are paying for.
The real cost of waiting: a simple way to check
Before you choose, do this math for your own numbers:
- Price gap: How much cheaper is the under-construction flat than a similar ready flat nearby?
- Add GST: Add 5% to the under-construction price. Stamp duty, registration and other charges apply to both, so they cancel out in this comparison.
- Add rent: Your monthly rent multiplied by the months until expected possession, plus a buffer of 6 to 12 months for delay.
- Add pre-EMI interest if you take a loan during construction.
If steps 2 to 4 add up to more than the price gap, ready-to-move is the better deal for you. Our cost and EMI calculator helps with the loan side.
Documents to check in each case
Ready-to-move: Occupancy Certificate, approved building plan, title deeds, e-Khata, RERA registration (if registered), encumbrance certificate, and the association and maintenance records.
Under-construction: RERA registration and the project page on the portal (check the registered completion date), approved plans, commencement certificate, title documents, and the draft agreement for sale. Have a lawyer review the agreement before you sign.
Our view
There is no single right answer. For most salaried families already paying rent in Bangalore, a ready or nearly ready flat often works out better once rent and GST are counted. For buyers who can wait and pick a builder with a strong delivery record, under-construction can give more choice at a lower price.
For the full process, see our step-by-step apartment buying guide.
Not sure which way to go? Share your budget, area and move-in timeline with us on WhatsApp and we will shortlist both types for you to compare. You can also browse current projects in Bangalore.
This article is general information, not financial or legal advice. Check every project's documents with a qualified lawyer before you pay.
Sources: Karnataka RERA portal, Mondaq: GST on flat purchase in India.