Under-construction vs ready-to-move: the real trade-offs
Should I buy an under-construction flat or a ready-to-move one?
Under-construction is usually cheaper per square foot, lets you pay in stages, and gives you more choice of unit — at the cost of delivery risk, years of paying rent and loan interest together, and GST on the purchase. Ready-to-move costs more and offers less choice, but you see exactly what you are buying, you stop paying rent immediately, and a completed property with an occupancy certificate is treated differently for GST. Neither is universally correct; it depends on whether your constraint is cash flow or certainty.
The honest comparison
- Price — Under-construction typically carries a discount to comparable ready inventory. Part of that discount is the developer paying you to take on risk and to fund their construction.
- Cash flow — Under-construction spreads payment across construction milestones. Ready generally requires the full amount around registration — which for many buyers is the deciding constraint.
- Certainty — With ready you see the actual flat, the actual view, the actual finish and the actual neighbours. With under-construction you are buying a drawing and a reputation.
- Rent overlap — This is the cost people forget. On under-construction you usually pay rent and interest on the disbursed amount simultaneously, for years. Add it up before comparing prices.
- Choice of unit — Early in a launch you can pick floor, facing and tower. In ready inventory you buy what is left.
- Taxes — GST applies to under-construction purchases; a completed property with an occupancy certificate is treated differently. Confirm the current rate and treatment for your specific purchase — the rules have changed more than once.
- Delivery risk — Delay is the normal case, not the exception. RERA gives you a declared date and a route to compensation, and neither is the same as living in your flat on time.
- Amenities — In a ready project you can see whether the clubhouse exists. In an under-construction one, amenities are sometimes scheduled for a later phase.
When under-construction genuinely makes sense
If your down payment is not fully ready and a construction-linked plan lets you buy now and pay as you save, the staging is worth real money. If you want a specific floor or facing, early-stage inventory is the only place you will get it. If you are buying in an area where supply is scarce and everything ready is priced accordingly, the discount can be material.
It works best when the developer's track record is strong and verifiable — completed projects you can visit, handovers close to promised dates, and earlier phases of the same project delivered. Buy the builder as much as the building.
When ready-to-move is the better call
If you are currently paying significant rent, ready-to-move often wins on total cost even at a higher headline price, because you stop paying rent the month you move in rather than three years later. If you need certainty — a school admission, an elderly parent moving in, a job that will not tolerate a year of limbo — certainty is worth paying for.
It is also the right answer if you cannot personally take on delivery risk: the compensation regime exists, but pursuing it costs time and attention that not everyone has.
How to compare the two fairly
- Compute the all-in price for both, including every charge and every tax — not the base rate.
- Divide the all-in price by carpet area for each, so you are comparing usable space.
- For the under-construction option, add your expected rent for the months until possession, plus the interest you expect to pay on disbursed tranches during that period.
- Add a realistic delay assumption to the under-construction option — take the developer's track record, not their brochure, as the guide.
- For the ready option, check the occupancy certificate exists and check the age and condition of the building, the lifts and the water system.
- Compare the two totals. Then decide separately whether the cash flow of the cheaper option is one you can actually sustain.
The half-way cases
- Nearing completion — A project at finishing stage carries much less delivery risk than one at foundation, and often still carries some discount. Ask to see the actual floor, not a sample flat.
- Ready but no occupancy certificate — Physically complete is not the same as legally ready. Without an OC you can face problems with utilities, khata and resale. Treat this as under-construction until the certificate exists.
- Resale of a completed flat — You get certainty and immediate possession, but the diligence burden shifts to you: title chain, encumbrance, dues to the association, and the condition of the property.
What to check either way
Registration status, the title chain and the encumbrance certificate matter in both cases. So does the maintenance number — a large clubhouse is a monthly bill for decades, and it is identical whether the building is new or three years old. And in both cases, compare on carpet area: the loading between carpet and super built-up varies by project, and it is the single easiest way to be quietly overcharged.
Frequently asked questions
Is GST payable on a ready-to-move flat?
A completed property with an occupancy certificate is treated differently from an under-construction sale for GST. The rates and conditions have changed more than once, so confirm the current position for your specific purchase with a chartered accountant.
How much cheaper is under-construction, typically?
It varies by city, project and stage — a project at foundation is discounted more than one at finishing. Rather than assuming a percentage, compute the all-in price per carpet square foot for both options and compare directly.
What happens if the project is delayed?
Your agreement should specify delay compensation and the date it runs from, and RERA provides a route to complain to the state authority. Both take time and attention. Check the developer's actual delivery record before relying on either.
Can I get a loan on a ready flat without an occupancy certificate?
Many lenders will not fund it, or will treat it as under-construction. It is one of the strongest practical reasons not to take possession before the OC is issued.
Does buying early in a launch guarantee a lower price?
Launch pricing is usually lower, and it also carries the most delivery risk and the longest wait. It is a trade of certainty for price, not a free discount.