Ready to move or under construction: what the wait costs

You’ve seen two flats and you can’t choose between them. One is finished. You could carry your boxes in next month. The other is cheaper, and the builder hands over the keys years from now.

Your rent goes out on the fifth of every month. That’s the part that keeps you awake. Wait for the cheaper flat, and you pay rent and a loan side by side until the keys arrive. Is the saving even real?

I won’t tell you which one is better. I’ll show you the money instead, worked out on a real flat off our own list, every rupee named. Then you decide.

My honest answer first, before any arithmetic. If you’re paying rent now, and the keys are more than two years away, the finished flat usually wins. Waiting costs more than families expect, and almost none of it comes back.

Three charges separate the two, and GST is the biggest

Most of the price is the same whichever flat you pick. Three charges aren’t.

GST is the tax the government adds on top of the price. On a flat still going up, you pay it. On a finished flat that already holds its occupancy certificate, the paper saying the building is fit to live in, you pay none.

Which row are you in? Two things decide it. The price, and the carpet area, which is the floor you can actually walk on. The lower rate needs both: under ₹45 lakh, and a carpet area of 60 square metres or less.

Stamp duty, the state’s tax on registering a sale, doesn’t move between the two. It’s 7% here either way, with registration capped at ₹30,000. We worked it out line by line in our guide to stamp duty in Navi Mumbai, so I won’t repeat it.

We can’t price a ready flat for you, and you should know that

Our own limit, up front. Our records mark 457 of the 458 projects we list as under construction, and the last one as a new launch. Not one is a finished flat with its certificate in hand.

So we can’t hand you a ready-flat price. That quote has to come from a seller or a broker. What we can do is show you exactly what the waiting costs on our side of the fence.

Why does that matter to you? Because a finished flat in Navi Mumbai is nearly always a resale flat. There’s a seller, a society to move the papers through, and no builder to call when a tap leaks in year two.

What the wait cost on one real Kharghar flat

Let’s do it on a flat you can go and see. Sai Proviso Atlantis in Kharghar starts at ₹45.99 lakh for a 2 BHK. Its registered handover month on MahaRERA, the state’s official register of approved projects, is December 2028. From today, that’s 26 months of waiting.

Now the assumptions, kept separate on purpose. A fifth of the price as your own money. A loan at 8.5% over 20 years. That sits in the middle of SBI’s own range this month, 7.50% to 8.80%. And rent of ₹20,000 a month, which is low on purpose: a 2 BHK here advertises nearer ₹36,000. Put your own rent in and the gap below only grows.

Your EMI, which is the fixed monthly payment to the bank, comes to ₹31,900. But you won’t pay a full one while the flat is going up. You’ll pay pre-EMI instead, which is interest on whatever the bank has released so far. None of it comes off what you borrowed. Across 26 months it averages about ₹13,000 a month.

Here’s the whole thing, side by side. One column is you waiting. The other is you living in a finished flat from month one.

What leaves your hands in 26 months	Still going up	Finished, certificate in hand
GST	₹2.30 lakh	Nil
Rent you keep paying	₹5.20 lakh	Nil
Loan interest	₹3.38 lakh	₹6.64 lakh
Stamp duty and registration	₹3.52 lakh	₹3.52 lakh
Total gone, nothing owned	₹14.40 lakh	₹10.16 lakh

We worked that table ourselves on 28 October 2026. The rates aren’t ours. The arithmetic is.

The gap is ₹4.24 lakh. That’s about 9% of the flat’s price, gone in 26 months, and none of it is yours to keep.

Look at the interest row again, because it looks unfair. The finished-flat buyer pays more interest, and that’s true. They also pay off ₹1.66 lakh of what they borrowed in the same months. The waiting buyer pays off nothing.

One thing the table leaves out, so nobody treats it as the whole bill. A resale flat can carry a society transfer charge. A new one usually carries a maintenance deposit and club charges. Ask for every line in writing, on both flats, before you compare them.

The tax relief waits with you as well

One more line the table leaves out. It leans the same way. The tax relief on loan interest doesn’t start when the interest does.

Buy a finished flat and that interest comes off your income in the first year. A flat still going up is different. Nothing can be claimed until the building is complete. The interest paid while waiting then returns in five equal yearly slices. It starts the year the flat is finished.

Here’s the order it arrives in.

1. While it’s going up Nothing to claim. The interest piles up on paper only.
2. The year it’s finished The first of five slices, on top of that year’s own interest.
3. The four years after One slice a year, until the pile is used up.

So the relief isn’t lost. It queues. A home you live in can only claim ₹2 lakh of interest in a year. The full EMI often fills that ceiling by itself. Then a slice of the old interest has nowhere to sit. Ask your accountant what’s left of it.

The longer the keys take, the bigger the discount you need

So how much cheaper does the unfinished flat have to be? It turns on one thing. How long you wait.

14 months7%

26 months9%

44 months13%

Those three waits aren’t round numbers I picked. They’re handover months off our own list. Sai Shri Narayana in Taloja is registered for December 2027, 14 months away. Tharwani Pristinea in Kharghar is registered for June 2030, which is 44.

One thing to be straight about. I kept the same ₹46 lakh price and the same rent across all three rows, and changed only the waiting. So those aren’t each flat’s own sums. Narayana starts far lower, at ₹25.28 lakh, and Pristinea higher, at ₹63.99 lakh. Run your own flat’s price through the same four lines.

Would you wait 44 months to save a tenth of the price? A child who starts nursery today would be in Class 3. Only you can answer that one, and it isn’t really a money question.

The rule I’d carry home: count the months to the handover month on the register, multiply by your rent, then add the GST. Take off the interest you’d pay on a finished flat over those same months. If the unfinished flat isn’t cheaper than that, take the finished one.

The handover month on the register is the only date that counts

The date on the brochure and the date on the register aren’t always the same. Only one of them binds anybody.

Our own records say something uncomfortable here. We list 212 projects across Kharghar, Taloja, Panvel and Nerul. Of those, 36 carry an earliest registered completion month earlier than this one. That’s our records, read on 28 October 2026.

Some of those will have filed an extension. Some are probably built, with our record still holding the first month the developer registered. I can’t tell from the outside, and nor can you. Which is why you check it yourself.

Every eligible project got four extra months this year

Here’s something almost nobody will mention in a showroom, and it may have moved your date already.

MahaRERA granted an automatic four-month extension to every eligible project. It applies where the completion date falls on or after 28 February 2026, and projects registered on or after 1 August 2026 are left out. The builder didn’t have to apply. The extra months simply arrived.

So the month you were quoted in June may not be the month on the page today. Read the current one yourself, and keep a screenshot with the date showing. Your right to interest for a delay outside that window stays intact, so the screenshot is worth taking.

Does that mean the December 2028 above has already moved? I can’t tell you from here. Our record holds the month the developer registered, and the register itself is the only place that shows what’s current. That one’s on you, and it takes two minutes.

Who should take ready, and who can afford to wait

Now the honest case for waiting, because it’s a fair one. You don’t hand over the whole price on day one. The money goes in stages as the floors go up, so the rest of it stays in your account earning something.

Worth putting a figure on that, since the table got one. Say half your own money, about ₹4.6 lakh, stays with you across the 26 months. In a deposit at 6% it earns roughly ₹60,000. Real money. It isn’t ₹4.24 lakh.

You also get a new structure, a new lift, and a builder who is still answerable for it. Hold that against the table. Sometimes it wins, and on a short wait it often does.

Somebody will also tell you the price will have risen by the time it’s built. I don’t know that, and nor do they. Decide on the money you can see, not on a figure nobody can promise you.

Five checks before you pay anybody

All five are free to ask for. All five fit into one evening.

1. One Open the project on the state register and read the handover month off it. Not off the brochure.
2. Two Ask for the carpet area in writing. That one measurement decides whether your GST is 1% or 5%.
3. Three On a finished flat, ask to see the occupancy certificate before you pay a rupee. No certificate means no GST relief and no safety sign-off.
4. Four On a resale flat, ask the society for a letter saying the seller owes nothing, and ask what the transfer charge is.
5. Five Write down your own rent and the months you’d wait. Multiply them. That figure is yours, not mine.

Both of these can be a good home. One is a home you’d open the door to in March, the other a home you’d grow into in 2028. Neither choice is the wrong one. You just deserve to make it knowing what the waiting costs, instead of finding out in the third year.

So send us the two flats you’re weighing, the finished one and the one going up. We’ll put the full cost of the wait beside each, with the monthly figure underneath.

The form sits on every area page, and it reaches the advisor for that area. You’ll find it on the 78 projects we list in Kharghar, on the 63 in Taloja and on the 52 in Panvel. Come and talk it through before you sign anything. Whichever one it turns out to be, make it a home, not just a number.

Questions buyers ask

Is a ready-to-move flat always more expensive?

Yes, nearly always, measured against the floor space you get. Whether it costs you more overall is a different question, and it’s the one this guide answers. Work out your wait first, then compare the two totals.

Do I pay GST on a resale flat?

No, as long as the building already holds its occupancy certificate. That’s the single biggest charge separating the two kinds of flat. Ask to see the certificate itself, not a promise of it.

Can I claim the GST back once the project is finished?

No. It’s charged on every instalment you pay before the certificate is issued, and it isn’t refunded afterwards. Which is why the flat’s stage, not your move-in date, decides the bill.

How do I know the handover date is real?

You don’t, and nor do I. What you can do is read the registered month yourself and look for an extension on the same page. Then ask whether you could live with that month slipping by a year.

What happens if the builder misses the registered month?

You get a choice. Stay in the project and claim interest for every month the keys are late. Or withdraw and ask for the whole payment back with interest. The law treats that as a right, not a favour. The complaint goes to the state authority. So keep the agreement and every receipt.

Is pre-EMI better than paying a full EMI while the flat goes up?

It’s smaller every month, so it’s easier to carry beside rent. It also leaves your loan untouched, so your 20 years start from the keys rather than from today. Ask your bank for both figures before you choose.

What changes if I’m buying this to let out?

Rent only starts when the building is finished. So an unfinished flat earns you nothing for all those months while the loan runs. Put the empty months into your sums first, the way we did in our guide to rental yield in Nerul and Sanpada.

Buying your first home here? Our six steps to buying a flat in Navi Mumbai put this in order, from the loan to the keys.