Home Loan for an Under-Construction Property: How It Actually Works
Short version: For an under-construction property, your loan is disbursed in stages tied to construction milestones, and you pay pre-EMI interest (interest-only, on the amount disbursed so far) until construction completes — full EMI (principal + interest) starts only after possession. The Section 24(b) tax deduction on pre-construction interest is also delayed: it's aggregated and claimed in five equal instalments starting the year construction finishes.
How disbursement works
Unlike a ready-to-move-in property where the full loan amount is disbursed at once, an under-construction property's loan is released in tranches, tied to the builder's construction milestones (foundation, slab completion, etc.) as verified by the lender. This protects both you and the lender — you're not paying interest on money the builder hasn't actually used yet, and the lender isn't releasing the full amount against an unfinished asset.
Pre-EMI: what you actually pay during construction
During the construction period, you typically pay pre-EMI — interest-only payments on the amount disbursed so far, not a mix of principal and interest like a normal EMI. This means:
- Your monthly outgo during construction is lower than your eventual full EMI would be (since it's interest on a growing, partial disbursement rather than the full loan amount).
- No principal is being reduced during this period — the loan clock effectively hasn't started paying down debt yet, only servicing interest on what's been released.
Once the property is complete and you take possession, full EMI (principal + interest, on the entire disbursed amount) begins, calculated over your originally agreed tenure — though check with your lender whether the pre-EMI period counts against your total tenure or extends it.
The tax deduction timing rule
This is a common point of confusion: interest paid during construction (the "pre-construction interest") is not deductible in the year you pay it. Instead, the total pre-construction interest is aggregated and can be claimed in five equal instalments starting the year construction is completed — on top of the regular interest deduction for that year (still capped at the overall ₹2 lakh Section 24(b) limit for a self-occupied property; see our tax benefits guide). This means if construction takes several years, you could be sitting on a meaningful pre-construction interest amount that only starts becoming deductible well after you've been paying it.
Risks specific to under-construction purchases
- Construction delays — you keep paying pre-EMI (and, if renting elsewhere simultaneously, rent too) for longer than planned if the builder misses timelines. This "double cost" period is one of the most common financial strains of buying under-construction.
- Builder/project risk — verify RERA registration and the builder's track record; a stalled project leaves you paying pre-EMI against an asset you can't yet use.
- Disbursement-linked delays — if the builder is slow to hit milestones, your loan disbursement (and therefore how much interest accrues) is affected too.
Should you buy under-construction or ready-to-move?
Under-construction properties are often priced lower than ready-to-move equivalents, and pre-EMI's lower monthly outgo during construction can ease near-term cash flow — but you take on construction and timeline risk, plus a delayed and more complex tax-deduction timeline. A ready-to-move property costs more upfront but gives you immediate possession, a straightforward full EMI from day one, and no pre-EMI/deferred-deduction complexity.
Once you take possession
Whatever the construction path, once full EMI starts, the same prepayment logic applies as any other loan — interest is front-loaded, so prepaying early still saves the most (see our prepay in year 1 guide). Model your post-possession EMI in the PrepayWise EMI calculator once your disbursement schedule and expected possession date are known.
Frequently asked questions
What is pre-EMI on an under-construction property loan? It's an interest-only payment on the loan amount disbursed so far during construction — no principal is reduced during this period. Full EMI (principal + interest) begins only after possession.
Can I claim tax deduction on pre-EMI interest right away? No — pre-construction interest is aggregated and claimed in five equal instalments starting the year construction completes, not in the year you actually paid it.
Is it riskier to buy an under-construction property than a ready-to-move one? It carries construction and timeline risk (delays, builder reliability) that a ready-to-move property doesn't have, though it's often priced lower. Checking RERA registration and builder track record helps manage this risk.
Does the pre-EMI period extend my total loan tenure? This varies by lender — some count the pre-EMI period within your originally agreed tenure, while others may extend it. Confirm this specifically with your lender before signing.
Educational content, not individual financial advice. Consult a tax professional for guidance specific to your situation.