Under construction vs ready to move — which home to buy
Ready-to-move homes cost 15–25% more than under-construction ones, but you skip GST, rent overlap, and delay risk. Here's how to decide.
If you’re sitting on a home loan pre-approval and a shortlist of properties, this question is probably eating at you. The builder is pitching a shiny under-construction flat in a new township at ₹65 lakh. Two streets away, a ready-to-move 2BHK in a completed society is listed at ₹80 lakh. Which one actually makes sense?
The honest answer: it depends on two things — your financial cushion right now, and how long you can wait. Let’s break both scenarios down properly.
The Under-Construction Trap Nobody Warns You About
The lower sticker price on an under-construction (UC) property is real. But the cost of waiting isn’t always obvious.
Say you book that ₹65 lakh flat in Pune today. The builder says possession in 36 months. During those three years, you’re likely paying EMIs on your home loan and rent where you currently live. If your EMI is ₹52,000/month on an ₹55 lakh loan (at 8.75% over 20 years) and your rent is ₹18,000/month in Kothrud, that’s ₹70,000 going out every month — for a house you can’t live in yet.
Over 36 months, that’s ₹6.48 lakh in rent alone that you’re burning while the property sits unfinished. Add to this the very real possibility of a 12–18 month delay — ANAROCK’s 2023 data showed nearly 44% of Indian residential projects delivered late — and that number climbs further.
There’s also the GST angle. Under-construction properties attract GST at 5% (or 1% for affordable housing under ₹45 lakh). Ready-to-move properties with an Occupancy Certificate have zero GST. On a ₹65 lakh property, that’s ₹3.25 lakh extra, quietly added to your cost.
Why Ready-to-Move Actually Costs Less Than You Think
The listed price is higher, yes. But the math often flips when you account for what you’re not paying.
Take that ₹80 lakh ready-to-move flat in the same area. You get possession immediately. Rent stops. The loan EMI on an ₹68 lakh loan (assuming ₹12 lakh down payment) at 8.75% over 20 years works out to roughly ₹60,500/month. That’s your only housing cost — because you’re living there.
Compare that to the UC scenario where you’re paying ₹70,000/month for three years and then starting full EMIs. The ready-to-move buyer is actually in a better cashflow position within 18–24 months of purchase.
There’s also tax clarity. Under Section 24(b) of the Income Tax Act, you can claim a deduction of up to ₹2 lakh/year on home loan interest — but only once you have possession. With a UC property, you get zero deduction during construction. The interest paid in those three years gets pooled and deducted in five equal instalments post-possession. So if you’re paying ₹4.8 lakh/year in interest during the wait, you’re losing ₹2 lakh worth of tax deduction every year — that’s roughly ₹60,000/year gone if you’re in the 30% tax bracket.
The One Case Where Under-Construction Wins
If you’re not buying to live in immediately — say you’re 28, renting with roommates in Bengaluru, paying ₹12,000/month, and the EMI fits within your budget alongside rent — then the price difference can genuinely work in your favour.
If a UC flat in Sarjapur today is priced at ₹70 lakh and similar ready properties in the same micro-market are at ₹90 lakh, that ₹20 lakh gap gives you meaningful upside. If the project delivers on time and prices appreciate at even 7% CAGR (compounded annual growth rate — the year-on-year average growth rate, smoothed out), your ₹70 lakh flat could be worth ₹86 lakh by the time you get possession. You’ve made paper gains before moving in.
But — and this is the part people skip — that upside only materialises if the builder delivers. Always check the project’s RERA registration on your state’s RERA portal (maharera.mahaonline.gov.in for Maharashtra, RERA Karnataka for Bengaluru, and so on). A RERA-registered project has a legal delivery timeline and compensation clauses. If it’s not registered, walk away.
So What Should You Actually Do?
If you need to move in within the next 12 months — because you’re getting married, your lease is ending, or you’re relocating — buy ready-to-move. The financial drag of double payments will outweigh any price advantage.
If you have 3+ years of flexibility, your EMI+rent combined stays under 40% of your take-home (so if you earn ₹1.2 lakh/month in hand, total housing costs shouldn’t exceed ₹48,000), and the project is RERA-registered with a builder who has delivered projects before — then under-construction is worth considering for the price upside.
The price difference has to be at least 15–20% to justify the wait, the risk, and the GST hit. Anything less and you’re not being rewarded enough for the uncertainty.
Frequently Asked Questions
Is GST applicable on ready-to-move flats?
No. If a property has received its Occupancy Certificate (OC), it is exempt from GST. Always ask the builder or seller for the OC before signing anything — if they can’t produce it, the flat is not legally “ready to move.”
Can I claim home loan tax benefits on an under-construction property?
You can claim Section 80C benefits on principal repayment only after possession. For interest under Section 24(b), the deduction is capped at ₹2 lakh/year but is only available post-possession. The interest paid during construction is accumulated and claimed in five equal instalments starting the year you get possession.
What happens if a builder delays possession?
If the project is RERA-registered, the builder is legally required to pay you interest on your invested amount for every month of delay — typically at the SBI MCLR rate (around 8.5–9%). You can file a complaint on your state’s RERA portal. If the project is not RERA-registered, your legal options are significantly weaker.
How do I check if a project is RERA registered?
Visit your state’s RERA website — for example, maharera.mahaonline.gov.in for Maharashtra or rera.karnataka.gov.in for Karnataka. Search by the project name or builder name. The registration number should also be printed on all builder advertisements and brochures. If it isn’t, that’s a red flag.
Should I go for a resale flat instead of a builder property?
A resale flat is essentially ready-to-move and can sometimes be priced lower than a builder’s new inventory in the same building — because the seller needs liquidity. The trade-off is older fixtures and possibly higher maintenance costs. It’s worth adding resale options to your shortlist and comparing on a total cost of ownership basis, not just the headline price.