The Core Trade-Off
Ready-to-move (RTM) flats and under-construction (UC) flats serve different buyer profiles. RTM offers certainty at a price premium. UC offers a lower entry price but demands patience, risk tolerance, and active RERA monitoring. In 2026, with India's largest developers having a multi-year backlog of delayed projects, this choice deserves rigorous analysis.
Price: UC is Cheaper, But the Gap Has Narrowed
Under-construction flats are typically priced 10–20% lower than equivalent ready-to-move units in the same micro-market. The discount represents the "construction risk premium" — the compensation you receive for waiting and bearing delivery uncertainty. However, in high-demand micro-markets like Whitefield (Bangalore) or Thane (Mumbai), UC prices from A-grade developers have nearly closed the gap with RTM, sometimes commanding premiums for specific floor plans or views.
UC pricing also changes during the construction cycle. Early-launch prices (pre-RERA registration, which is technically illegal but still practiced) are lowest, followed by post-registration prices, soft-launch prices, and then final launch. Buyers who time entry at post-RERA-registration soft launch capture most of the price benefit.
GST: A Major UC Disadvantage
This is often underweighted by buyers. GST applicability differs significantly:
- RTM with OC: 0% GST. If the builder has received an Occupancy Certificate before the sale, no GST applies.
- UC (affordable housing, carpet area ≤60 sqm, value ≤₹45L): 1% GST.
- UC (other residential): 5% GST on the agreement value.
On a ₹80L under-construction flat, 5% GST = ₹4L extra. This must be added to your cost comparison before concluding UC is cheaper.
Delivery Risk: The UC Achilles Heel
Data from RERA portals across India shows that 50–70% of projects in major cities are behind their registered possession dates. While severe delays (3+ years) are concentrated among smaller developers, even large listed companies have project-level delays of 12–24 months. Statistically, if you buy UC, there is a 40–60% chance of at least a 12-month delay.
The RERA delay interest mechanism (SBI MCLR+2%) partially compensates for this, but claims require filing and effort. RTM has zero delivery risk by definition.
Home Loan Dynamics
- RTM: Loan is fully disbursed at registration. EMI starts immediately. You move in and the EMI is offset by savings on rent.
- UC: Loan is disbursed in tranches as construction progresses. You pay pre-EMI interest on each disbursed tranche — which can run for 2–4 years. During this period, you also pay rent. The double burden (pre-EMI + rent) can be ₹30,000–₹70,000/month depending on city and loan size. This hidden carrying cost is frequently ignored in buyer calculations.
Customisation
UC allows some degree of interior specification (tile choices, kitchen layout modifications, partition walls) in the early stages of construction if you book early. RTM offers no customisation but spares you the hassle of coordinating with the builder during construction. For most buyers, the customisation benefit is modest relative to the carrying cost and delay risk.
When to Choose UC
- Budget constraints make the 10–20% UC price advantage meaningful.
- The specific project, location, or floor plan is only available in UC format.
- You have a long investment horizon (5+ years) and are not time-pressured for occupancy.
- The developer has a strong track record — all past projects delivered within 6 months of committed date.
- RERA portal QPRs are up to date and show healthy construction progress.
When to Choose RTM
- You need to move in within 6 months (job transfer, school admission, lease expiry).
- You are an NRI and cannot actively monitor construction progress.
- Your risk appetite is low and financial planning requires certainty.
- The RTM-UC price gap in your target micro-market is below 10% (the GST and carrying cost differential alone may exceed this).
The Brickplot Angle
Before committing to any UC project, check the RERA portal for the builder's historical delivery record across all their projects — not just the one you're considering. A builder who delivered three projects with 18-month average delays is likely to repeat the pattern. Use our project score which factors in possession-date risk as a key axis.
FAQ
Can I get a home loan for a UC project?
Yes, all major banks and HFCs fund UC projects that are on their approved list. Verify your target project is approved by your preferred lender before booking.
Is the GST on UC recoverable?
No. GST paid on residential property purchase is not available as input tax credit to individuals. It is a sunk cost.
Does RERA protect me if the UC developer goes bankrupt?
RERA mandates a 70% escrow on collections. If the developer genuinely goes bankrupt, the NCLT/IBC process takes over. RERA interest and refund claims have priority over unsecured creditors under IBC amendments, but recoveries are not guaranteed in insolvency cases.