On an under-construction flat, pre-EMI costs less each month while it is built, but it pays only interest on what the bank has disbursed, so the whole loan is still owed at possession and the 20-year EMI starts only then. Full EMI from the first disbursement costs more each month but repays principal from the start. In effect, full EMI is a prepayment made during construction: on the ₹60 lakh loan in the table below, it repays about ₹12.8 lakh before possession and ends the loan about 8 years sooner.
What is pre-EMI interest, and what does full EMI repay?
An under-construction property loan is paid out as the builder finishes each stage of work. This staged payout is called tranche disbursement. Until the last tranche goes out, the lender usually offers two ways to pay.
Pre-EMI interest is interest at the loan rate on the amount disbursed so far, and nothing more. Principal does not fall, and the tenure clock has not started. Full EMI means paying the EMI on the whole sanctioned loan from the first tranche: the part above the interest repays principal at once. Some lenders also offer an EMI on the amount disbursed so far, which sits between the two.
Shreya's ₹60 lakh loan: the 3-year cost, both ways
Shreya's CTC is ₹34 lakh a year. Her ₹60,00,000 loan is at 8.5%, an assumed rate; in 2026 lenders charged from about 7.25% for strong credit scores to 10% or more for weaker ones. Over 20 years the EMI is ₹52,069. The bank pays ₹20,00,000 at booking, ₹20,00,000 at month 18 and the last ₹20,00,000 at possession, at month 36.
On pre-EMI she pays 8.5% ÷ 12 on what is out: ₹14,167 a month on ₹20 lakh, then ₹28,333 on ₹40 lakh.
| Shreya's loan | Pre-EMI | Full EMI |
|---|---|---|
| Paid each month while building | ₹14,167, then ₹28,333 | ₹52,069 |
| Paid in the 3 years | ₹7,65,000 | ₹18,74,500 |
| Of which interest | ₹7,65,000 | ₹5,97,400 |
| Owed at possession | ₹60,00,000 | ₹47,22,900 |
| EMIs left after possession | 240 | 146 |
| Last EMI, years from first disbursement | 23 years | 15 years 2 months |
| Total paid to loan end | ₹1,32,61,700 | ₹94,62,400 |
| Total interest | ₹72,61,700 | ₹34,62,400 |
The gap of about ₹38 lakh is not a cheaper rate. Full EMI is a prepayment made during construction: ₹11,09,500 more paid in three years cuts ₹12,77,100 off the balance, and the same ₹52,069 then clears the smaller balance 94 EMIs sooner. If she took pre-EMI and prepaid ₹12,77,100 at possession, she would land exactly where full EMI does.
Can you carry the full EMI and rent at ₹25, ₹34 or ₹40 lakh?
The cost of full EMI is cash during construction, often while rent is still due. Worked on the same structure as CTC vs in hand salary, Shreya's ₹34 lakh CTC leaves about ₹2,00,500 a month. With an assumed ₹40,000 rent, here is each option as a share of in-hand pay:
| CTC | In hand a month | Pre-EMI ₹28,333 + rent | Full EMI ₹52,069 + rent |
|---|---|---|---|
| ₹25 lakh | ₹1,56,700 | 43.6% | 58.8% |
| ₹34 lakh | ₹2,00,500 | 34.1% | 45.9% |
| ₹40 lakh | ₹2,29,100 | 29.8% | 40.2% |
At ₹25 lakh, full EMI and rent take close to 60% of pay before food, school fees or SIPs. Counting only the EMI and the rent, six months of cover is about ₹5,52,400 on full EMI and ₹4,10,000 on pre-EMI. The emergency fund guide sizes the full buffer at six months of essential expenses, or nine to twelve for the only earner in a household with dependants or largely variable pay.
Does the pre-construction interest deduction change the answer?
Not for Shreya, in either regime. In the new regime, the default, there is no interest deduction on a self-occupied home.
In the old regime, section 24(b) of the 1961 Act (renumbered in the Income-tax Act, 2025) allows the pre-construction interest deduction: interest paid before the year construction finishes is claimed in five equal parts from that year. But all interest on a self-occupied home shares one ₹2,00,000 cap a year. Her first year of interest after possession is about ₹5,05,400 on pre-EMI and ₹3,92,500 on full EMI, so the cap is full either way and the ₹7,65,000 adds nothing. Principal repaid before completion gets no deduction under section 80C of the 1961 Act (section 123 of the 2025 Act) either. A couple who co-own and co-borrow can each claim the cap, as the co-borrower post shows.
When does pre-EMI still make sense?
When the cash would otherwise strain the month, or when the project may run late. Money paid into a loan is hard to take back, and a delay means more months of rent. One middle route: take pre-EMI and put the difference, ₹37,902 a month and then ₹23,736, in a recurring deposit or a fresh FD each month. At an assumed 6.5% (large banks paid about 6% to 6.5% in October 2026), taxed each year at 31.2%, it grows to about ₹11,94,000 by possession, about ₹83,000 short of what full EMI repays. That shortfall is the price of keeping the money reachable. Whether that money should go into the loan or into investments is the test in prepay home loan or invest.
Dhi puts an under-construction loan in one view with your cash flow, net worth, protection and goals, and answers from your own numbers what each EMI option does to your month. Dhi takes no commissions and never mis-sells.
Frequently asked questions
This is general information for salaried individuals in India, not personalised financial advice.
