We have advised buyers in Gurgaon for over 20 years. The same mistake shows up again and again.
If we had a rupee for every time a buyer told us they chose an under-construction flat because it was cheaper, there would be enough for a decent down payment. In most cases, they were right about the lower sticker price. In most cases, they were wrong about the total cost. The gap between what you think you are paying and what you actually end up paying on an under-construction property is where a lot of wealth quietly disappears. This blog exists to fix that.
The good news is that once you understand how to think about this choice, the decision is not complicated. It depends entirely on who you are as a buyer and what you need the property to do for you.
The Price Gap Is Real. But It Is Smaller Than You Think.
Under-construction properties in Gurgaon are typically priced 10 to 20 percent lower than ready-to-move units in the same micro-market. On a Rs 2 crore flat, that sounds like Rs 20 to Rs 40 lakh in savings. That is serious money. But it is not the full picture.
When you buy an under-construction flat from a builder, you pay 5 percent GST on the entire transaction value. On a Rs 2 crore under-construction unit, that is Rs 10 lakh in tax that simply does not apply when you buy a ready-to-move flat. RTM properties with a valid Occupancy Certificate attract zero GST. Your only costs are Haryana's stamp duty at 7 percent and registration charges at roughly 1 percent. Affordable housing qualifies for a reduced GST rate of 1 percent, but most liveable Gurgaon properties do not meet the Rs 45 lakh price ceiling that triggers that classification.
So that Rs 20 to Rs 40 lakh saving just shrank by Rs 10 lakh on tax alone, before you have unpacked a single box.
The Dual Payment Trap Nobody Talks About
Here is the second cost most buyers do not build into their thinking. If you are buying an under-construction flat in 2026 with possession in 2028, you are going to continue paying rent for approximately two years. In the same sectors where people buy under-construction units, a decent rental runs Rs 35,000 to Rs 60,000 per month. Over 24 months, that is Rs 8.4 lakh to Rs 14.4 lakh paid to someone else's investment while your flat gets built.
Meanwhile, your home loan EMI or pre-EMI interest has also started. Add everything together and the cost advantage of choosing under-construction becomes substantially narrower than the brochure suggested. In some cases, it disappears completely.
The Honest Maths
Under-construction saving of Rs 30 lakh, minus Rs 10 lakh GST, minus Rs 10.8 lakh in 24 months of rent, leaves you with an effective saving of Rs 9.2 lakh. The question every buyer should ask is: is a Rs 9 lakh saving worth two years of uncertainty, construction risk, and deferred life plans?
The Risk Profile Is Very Different on Each Side
An RTM property carries virtually no delivery risk. You visit the actual flat, you check the lifts, you look at the view as it actually exists rather than how it appears in a render, you speak to existing residents, and you sign with full information. What you see is precisely what you are buying.
An under-construction property is a promise backed by a plan. HRERA has significantly tightened delivery timelines, and Gurgaon's regulatory environment is far better than it was in 2018 or 2019. But delays still happen. Builders face liquidity cycles. The open green area shown on the site plan sometimes becomes a parking facility. These are not theoretical risks. They are documented outcomes across multiple HRERA-registered projects in the city. As a buyer, you should price that risk in consciously, not optimistically.
For investors buying to rent, RTM wins clearly. Rental income starts from day one, typically Rs 30,000 to Rs 80,000 per month depending on sector and configuration, rather than sitting idle for 24 to 36 months while construction completes.
Where Under-Construction Genuinely Makes Sense
This is not a one-sided argument. Under-construction is the right choice in specific situations.
If you are an investor with a five-year or longer hold horizon, buying in an emerging corridor where the infrastructure story is still unfolding, you want to be early. You want to buy before the metro opens, before the commercial hubs absorb tenants, before prices have fully reflected the future. In that case, the lower entry price matters because it improves your return percentage on invested capital and gives you exposure to a narrative that is still maturing.
Under-construction also makes sense when the builder is a Tier-1 developer with a verified HRERA delivery record, the project's registration is confirmed on the HRERA portal, and you want a floor plan or facing that is simply unavailable in RTM inventory. Choice of unit is a genuine advantage in the early phases of a large project.
RTM vs Under-Construction: Full Comparison
| Factor | Ready to Move (RTM) | Under-Construction (UC) |
|---|---|---|
| GST Applicable | Zero (OC issued) | 5% standard, 1% affordable |
| Possession | Immediate | 12 to 48 months typically |
| Delivery Risk | None | Low to moderate (HRERA) |
| Rental Income | Starts Day 1 | Delayed by construction period |
| What You Inspect | Actual completed unit | Model flat and renders |
| Price Entry | 10 to 20% higher | 10 to 20% lower |
| Dual Payment Risk | None | Rent plus EMI overlap common |
| Appreciation | Steady 8 to 12% p.a. | Higher if corridor matures |
| Best Suited For | End-users, NRIs, yield buyers | Patient investors, 5 yr+ hold |
Source: HRERA, 99acres, Anarock Q1 2026. Figures are indicative.
The Verdict by Buyer Type
Choose Ready-to-Move If
- You need to live in the property within the next 12 months
- You want rental income to start immediately
- You are an NRI buying from abroad without the ability to do regular site visits
- You prefer zero ambiguity on quality, possession, and layout
- You are a family needing to settle into a school zone now, not in two years
Choose Under-Construction If
- You are investing with a five-year or longer horizon
- You are buying in a corridor with a strong upcoming catalyst such as the Dwarka Expressway metro
- The developer's HRERA delivery record is verified and consistent across prior projects
- You are not paying high rent during the construction period
- You want a specific floor, facing, or unit size unavailable in completed stock
Not Sure Which Route Is Right for You?
Every buyer's situation is different. RTM and under-construction both have a place in a smart property plan. Book a free consultation with Realty Canvas and we will help you find the right fit based on your timeline, budget, and goals, along with a tailored shortlist of verified projects.
