Ready-to-Move vs. Under-Construction: Pros, Cons and Hidden Costs

The ready-to-move vs. under-construction question comes up in almost every first conversation I have with a buyer, and the honest answer is that neither is "better". They are different deals with different risks, and the right choice depends on your cash flow, your patience and how much you trust the builder. What trips people up is not the headline price but the costs that do not appear in the brochure.

Here is how I walk buyers through it.

The basic trade-off

Ready-to-move means the building has its completion or occupancy certificate, you can inspect the actual flat, and you can shift in within weeks of registration. You pay for certainty.

Under-construction means you are buying a promise: a floor plan, a sample flat and a possession date. You typically pay less per square foot, often with a payment plan linked to construction stages. You are paid for patience and risk.

Everything else follows from that.

Ready-to-move: pros and cons

What you get

• What you see is what you buy. Actual sunlight, actual view, actual neighbours, actual water pressure at 7 am. No surprises about the "park-facing" flat facing a transformer.
• No GST. Completed property is outside GST, which on an under-construction purchase can add a meaningful amount to the cost. Confirm current rates with your CA.
• No rent plus EMI overlap. You stop paying rent the month you move in.
• Faster loan processing. Banks are comfortable with completed, registered projects.
• Known maintenance. The society or RWA exists, the monthly charges are known, and you can ask residents how well the builder handled snags.

What it costs you

• Higher price per square foot. You pay a premium for zero waiting.
• Older stock. Ready units in a mature sector may be five to fifteen years old, with older fittings and sometimes older building norms.
• Less choice. The best-facing units in a finished project were usually picked up years earlier.
• Resale paperwork. If buying from an individual owner rather than the builder, you will need society NOC, dues clearance and transfer charges. The resale flat buying guide covers that list.

Under-construction: pros and cons

What you get

• Lower entry price. Launch and early-stage pricing is typically below comparable ready units.
• Construction-linked payments. You pay in slabs as work progresses, which can ease cash flow if you are saving alongside.
• Choice of unit. Floor, facing, corner units, all available at booking.
• Newer specifications. Modern layouts, better parking ratios, newer fire and earthquake norms.
• Appreciation during construction. If the area develops as promised, the flat may be worth more on possession than you paid.

What it costs you

• Delay risk. This is the big one. A two-year promise that becomes four years means two extra years of rent plus EMI.
• GST on payments. Applicable on instalments paid before the completion certificate. Check the current rate for your category of housing.
• Pre-EMI interest. Many banks charge interest on the disbursed amount during construction, which builds no equity.
• Specification drift. The sample flat has Italian marble; the handover has vitrified tiles. Read the specification annexure, not the brochure.
• No neighbourhood yet. Schools, markets and the promised metro link may be years away.

The hidden costs buyers forget to add

Write these down before comparing the two prices, because they change the answer more often than the base rate does.

1. Rent during construction. If you pay ₹20,000 a month in rent and possession is 30 months away, that is roughly ₹6 lakh that never comes back. Add any delay.
2. Pre-EMI interest. Ask the bank for a written estimate based on the builder's disbursement schedule.
3. GST on the under-construction price. Ask for the all-in figure with GST shown separately.
4. Stamp duty and registration. Applies to both, calculated on the agreement value or circle rate, whichever is higher in most states. Check your state's current rates.
5. Preferential location charges, club membership, power backup, parking. Builders often keep these outside the headline rate. Get every charge in writing.
6. Maintenance deposit and advance maintenance. Frequently collected for 12 to 24 months at possession.
7. Interiors and fit-out. A bare-shell under-construction handover may need far more than a ready unit where the previous owner has already fitted wardrobes and a modular kitchen.
8. Society transfer and NOC charges. Mainly a resale cost, but builders also sometimes charge a transfer fee if you buy an under-construction unit from an earlier allottee.

Do the arithmetic with all eight lines and the "cheaper" option is sometimes not cheaper at all.

A simple way to compare

Build a one-page sheet with two columns and these rows: base price, GST, stamp duty and registration, other builder charges, rent until possession, pre-EMI interest, interiors, maintenance deposit. Total each column. Then ask two questions:

• If the under-construction project slips by 18 months, does the gap still justify the wait?
• If I had to sell in five years, which unit would be easier to sell?

The second question matters more than people think. A completed flat in a working society is a known quantity. An under-construction unit resold before possession carries the same delay risk for your buyer.

Questions to ask before choosing under-construction

• Is the project RERA-registered, and what possession date is declared on the RERA portal?
• What is the builder's track record on previous projects: delivered on time or two years late?
• Is the land title clear and is the project approved by major banks? Bank approval is not a guarantee but it is a useful filter.
• What exactly does the agreement say about delay compensation, and is it in line with the state RERA rules?
• Are the payment slabs tied to physical construction milestones or to calendar dates?

There is a longer list in the guide on questions to ask a builder before booking a flat, and it is worth taking to the sales office printed out.

Where an agent fits in

A good agent will not push you towards whichever option pays a higher commission. They will show you three ready units and two under-construction options in the same budget, explain the all-in numbers for each, and tell you which builders in the area have actually delivered. If you are working with an agent, look at their profile and past deals; a live agent page with a record of closed sales tells you more than a business card. And if you are an agent reading this, putting your listings on your own property pages with the full cost breakdown is the fastest way to be seen as the straight talker in your sector.

Who should pick what

Lean ready-to-move if: you are paying rent, you need the flat within a year, you are stretching the budget and cannot absorb a delay, or you are buying for an elderly parent who needs certainty.

Lean under-construction if: you are living rent-free or cheaply, you have three or more years of runway, you want a specific facing or floor, you have checked the builder's delivery history, and the all-in sheet still shows a clear saving after GST, pre-EMI and rent.

Either way, put every number on paper before you put a token amount down.

Frequently asked questions

Is GST charged on a ready-to-move flat?

Generally no. GST applies to under-construction property where payment is made before the completion certificate is issued. A flat with a completion or occupancy certificate is treated as a completed building and is outside GST, though stamp duty and registration still apply. Confirm the current rules with your CA.

How much cheaper is an under-construction flat typically?

It varies by city and builder, but a launch-stage flat is often priced noticeably below a comparable ready unit in the same area. That gap is your compensation for waiting and for taking on delay risk, so weigh it against the rent and EMI you will pay in the meantime.

What protects me if the builder delays possession?

RERA requires registered projects to declare a possession date and provides for interest or refund on delay. Always check the project's RERA registration, read the agreement's delay clause, and keep every payment receipt. Check your state RERA authority's current rules.