Two numbers arrive with every under-construction home loan sanction, and they look like a choice between a small monthly payment and a large one. Pay only the interest while the building rises, or start repaying the loan from the first disbursement. Most buyers pick on the monthly figure, many explainers say pre-EMI "costs lakhs more", and both skip the question that actually decides the size of the difference.
Key takeaways
- Pre-EMI pays interest only on what has been disbursed; full EMI starts repaying principal from the first disbursement. Neither changes the rate you pay.
- On a Rs 60 lakh loan at 8 percent with a 30-month build, pre-EMI costs about Rs 6 lakh before possession, all of it interest, and the full Rs 60 lakh is still owed at the keys.
- The choice itself is worth about Rs 1.6 lakh over the loan's life when both options end on the same date.
- The larger gap usually quoted, about Rs 10.4 lakh here, comes mostly from the lender starting a fresh 20-year term at possession, which makes the loan run two and a half years longer.
- A construction delay hurts the pre-EMI borrower most: stretch the same build to 48 months and the interest paid before possession rises from Rs 6 lakh to Rs 9.6 lakh.
The two options, defined honestly
A construction-linked home loan is released in pieces as the building reaches stages, a mechanism set out in the home loan on an under-construction flat. Between the first release and the last, the bank has lent you part of the money, and the two options are two ways of servicing that part.
Pre-EMI charges interest on the amount disbursed so far and nothing else. It starts small and grows with each tranche. It repays no principal, so on the day of possession you owe exactly what you borrowed, and the regular EMI begins then.
Full EMI treats each disbursement as the start of repayment. The bank computes an EMI on what has been released, recalculating as each new tranche arrives, and part of every payment reduces the principal from the first month.
The strongest case for pre-EMI is cash flow. A buyer paying rent for another home while their own is being built is carrying two housing costs at once, and pre-EMI keeps the second one smaller for as long as construction lasts. The strongest case for full EMI is that it is cheaper, and that it keeps you ahead of the loan rather than behind it if the building slows down.
Neha's two quotes
Neha (illustrative, as our stories always are) was buying her 2BHK in a Mulund redevelopment project on a construction-linked plan, with possession promised in 30 months and a Rs 60 lakh loan sanctioned at a floating rate. Her bank offered both options, and the relationship manager summarised the difference as "pre-EMI is lighter now, full EMI is cheaper overall".
That was true and not very useful, because it did not say how much cheaper, or what the lighter payments cost her. So she asked the bank for the full repayment schedule under each option, including one line nobody had mentioned: the date the loan would end. Names and numbers in this story are illustrative.
What the two options actually cost
Take her case as a worked example: Rs 60 lakh at 8 percent a year, released in six equal tranches of Rs 10 lakh, the first at the start and the last at possession 30 months later, then repaid over 20 years. The 8 percent sits inside State Bank of India's published home loan range of 7.25 to 8.45 percent in September 2026, with the Reserve Bank's repo rate at 5.25 percent after a cumulative 125 basis points of cuts. The arithmetic is ours; the rate is illustrative, and yours will differ.
| 30-month build, Rs 60 lakh at 8 percent | Pre-EMI | Full EMI |
|---|---|---|
| Payment in the first month | Rs 6,667 | Rs 8,364 |
| Payment in the last month before possession | Rs 33,333 | Rs 42,755 |
| Paid before possession | Rs 6.00 lakh, all interest | Rs 7.64 lakh, of which Rs 1.76 lakh repays principal |
| Still owed at possession | Rs 60 lakh | Rs 58.2 lakh |
| EMI after possession | Rs 50,186 for 20 years | Rs 51,617 to the original end date |
| Loan ends | 22.5 years after the first disbursement | 20 years after the first disbursement |
| Total interest over the loan | Rs 66.4 lakh | Rs 56.0 lakh |
The last row is the one people quote: pre-EMI costs about Rs 10.4 lakh more. It is correct for this pair of schedules and it is also misleading, because the two schedules differ in two ways at once, and only one of them is the choice you think you are making.
Where the Rs 10 lakh actually comes from
Look at the second-last row. Under pre-EMI, many lenders start the 20-year repayment term at possession, so a loan that began 30 months earlier ends 22.5 years after the first disbursement. Under full EMI, the term often runs from the first disbursement, and the maturity date on each schedule shows which applies. Part of the gap is therefore not pre-EMI at all. It is two and a half extra years of borrowing.
Separate the two and the picture changes.
Source: ReraGenie arithmetic: Rs 60 lakh at 8 percent a year, monthly rests, six equal Rs 10 lakh tranches spread across construction, 20-year repayment. 8 percent sits inside SBI's published home loan range of 7.25 to 8.45 percent, September 2026.
The pre-EMI or full EMI choice, on its own, is worth about Rs 1.6 lakh here. Keep the end date the same and pre-EMI's cost is the interest on principal you did not repay during construction, which is real but modest. About Rs 8.8 lakh of the familiar Rs 10.4 lakh comes from the end date moving out by 30 months.
That turns one vague question into two precise ones, and the second is the one worth asking the bank in writing: under pre-EMI, does the 20-year term start at possession, or does the loan keep its original maturity with a slightly higher EMI? On this example, the same-maturity version of pre-EMI carries an EMI of Rs 53,173 rather than Rs 50,186, for 210 months rather than 240. That Rs 2,987 a month is the price of finishing when a full EMI borrower finishes.
Ask for both repayment schedules as documents, not as a verbal summary, and read the maturity date on each. It is the single line that explains most of the difference between them, and it is the line least often mentioned when the options are presented.
An analogy: paying only the interest on a card
Anyone who has paid only the minimum on a credit card knows the feeling pre-EMI produces: the payment is comfortable, the statement never shocks you, and the balance never moves. Pre-EMI is that arrangement, deliberately, for a fixed period. It is a sensible tool when cash is genuinely tight, and a costly habit when it is not. The important difference from a credit card is that the balance here keeps growing on a schedule set by the building, not by your spending.
When a delay changes the answer
Everything above assumes the building finishes when promised. It often does not, and a delay does not treat the two options equally.
Stretch the same six tranches over 48 months instead of 30 and the pre-EMI borrower pays Rs 9.6 lakh of interest before possession instead of Rs 6 lakh, still with the full Rs 60 lakh outstanding at the end of it. If the lender then starts a fresh 20-year term, total interest reaches Rs 70.0 lakh. The full EMI borrower, over the same 48 months, has paid Rs 12.3 lakh, of which Rs 3.1 lakh has already reduced the loan, and faces a somewhat higher EMI later because the same end date now has less time left to run.
So a delay adds months of payments before the keys under either option, but under pre-EMI those payments are pure interest: 18 months of extra payments that buy nothing except time. It also widens the gap between the two. With the end date held the same, pre-EMI's extra cost rises from about Rs 1.6 lakh on the 30-month build to about Rs 2.7 lakh on the 48-month one. The buyer's remedy for a late project, interest for every month of delay under Section 18, is worked through in computing your delay interest claim. It compensates the delay; it does not return the pre-EMI you paid through it.
This is why the promoter's delivery record belongs in a loan decision. A buyer choosing pre-EMI is, in effect, betting that construction finishes on time, and that bet can be priced from public filings. How to check a builder's track record reads the promoter's past projects against their promised dates, and the quarterly progress reports show whether this building is moving at the pace its disbursement schedule assumes.
The framework: five questions that decide it
- Are you paying rent while the flat is built? If yes, the monthly saving from pre-EMI is doing real work. If not, full EMI is usually the better trade.
- When does the loan end under each option? Ask for both schedules and read the maturity dates. This single answer explains most of the headline difference.
- How long is construction likely to take, not how long is it promised to take? The longer and less certain the build, the more pre-EMI costs and the stronger the case for full EMI.
- What does the promoter's record say? A promoter whose last three projects delivered close to their dates makes the pre-EMI bet cheaper. One with a pattern of extensions makes it dearer.
- Would a delay strain you? If an extra year of pre-EMI would be a real hardship, that is an argument for the smaller payment now, and an argument for reading the promoter's record even more carefully before booking.
Tax, briefly
Under the old tax regime, interest you pay in the years before the one in which construction is completed is not deducted in the year you pay it. It accumulates and is allowed in five equal instalments from the tax year in which construction is completed, under section 22 of the Income-tax Act 2025, which replaced section 24 of the 1961 Act. Those instalments sit inside the same Rs 2 lakh annual cap as the rest of your home loan interest on a self-occupied flat, a cap that falls to Rs 30,000 if construction is not completed within five years from the end of the tax year in which the loan was taken, and the new tax regime, which is now the default, allows no such deduction at all.
On a Rs 60 lakh loan, the interest paid in the first year after possession alone is about Rs 4.75 lakh, well above the cap. The deduction for construction-period interest therefore rarely changes the pre-EMI decision on a loan this size. Confirm the treatment for your own return with your tax adviser.
What the filings add
A bank's disbursement schedule assumes the building will reach each stage on time. The promoter's filings say whether that assumption has held for this promoter before, and whether it is holding now. For any covered Maharashtra project, the Rs 499 ReraGenie buyer report sets the promoter's other registrations against their original and current completion dates, shows this project's own extension history with the reasons the promoter filed, and reads the construction progress building by building. If you are deciding how much to pay while you wait, start with the project's free page and see how long the waiting has taken before.
The one-line summary
Pre-EMI or full EMI is a cash-flow choice worth about Rs 1.6 lakh on a Rs 60 lakh loan; the Rs 10 lakh gap between the two schedules comes from when the 20-year clock starts, and a delay widens the gap against pre-EMI.
Methodology and sources
- Repayment figures: ReraGenie arithmetic on a Rs 60 lakh loan at 8 percent a year with monthly rests, released in six equal Rs 10 lakh tranches spread evenly across construction (the first at the start, the last at possession), repaid over 20 years. Full EMI recalculates the EMI on each disbursement over the tenor remaining to a fixed end date 20 years after the first release. Your lender's disbursement stages, rate resets and rounding will differ.
- Rate context: State Bank of India published home loan range of 7.25 to 8.45 percent, September 2026, and external benchmark lending rate of 7.90 percent since 15 December 2025; Reserve Bank of India repo rate of 5.25 percent after cuts totalling 125 basis points, the last in December 2025, unchanged at every review since, most recently in August 2026.
- Tax treatment: section 22 of the Income-tax Act 2025, in force from 1 April 2026. This is general information, not tax advice.
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