At the handover of a new tower in Hebbal, a buyer was handed a demand note that stopped her short: on top of the flat's price, the registration, and the first year of maintenance, there was a one-time corpus fund of over 70,000 rupees. Nobody had explained what it was, whether she would get it back, or why the building needed it. The answer matters, because that single line item quietly funds the long life of the building you are buying into, and the rules around it decide whether your money is protected.

The short answer. A corpus fund is a one-time amount you usually pay at possession, whose principal is kept intact in a bank account so that only the interest it earns is spent on the building, while a sinking fund is collected periodically and its principal is deliberately spent on major future repairs like lift replacement or waterproofing. Neither is refundable to you personally when you sell, because the money belongs to the building, not to any one owner. The trade-off is real but fair: you pay upfront for a financial cushion you may never personally draw on, in exchange for a building that can afford its own ageing without sudden, painful special collections.

What is a corpus fund and how does it work?

A corpus fund is the building's endowment. According to the corpus fund explainer published by ASBL, it is a one-time investment made at possession whose original amount never gets used, so that only the interest earned on it is applied to maintenance. The principal sits untouched in a bank account, quietly generating income. ASBL gives an illustrative example: a 1,000 square foot flat charged at 72 rupees per square foot pays 72,000 rupees once, and at 6 percent annual interest that produces about 4,320 rupees a year for maintenance while the original amount stays intact. Those exact rates vary by project and by prevailing interest, so treat the figures as an illustration rather than a fixed tariff. The principle, however, is constant: a corpus fund is designed to last indefinitely by spending only what it earns.

How is a sinking fund different from a corpus fund?

The two are often confused, and some builders even use the names interchangeably, but the mechanics differ in one decisive way. Where a corpus fund preserves its principal and spends only interest, a sinking fund is money accumulated over time, collected periodically rather than once, whose principal is meant to be spent when a big expense arrives. ASBL describes the sinking fund as being for significant future costs such as lift replacements, waterproofing, or structural repairs, the kind of large capital jobs that would otherwise force a sudden special levy on every owner. So the corpus fund is the endowment that survives on its interest, and the sinking fund is the savings pot that gets drawn down for planned major works. A well run society usually has both, and a buyer should understand which they are being charged for.

Do you get the corpus or sinking fund back when you sell?

No, and this surprises many first time buyers. ASBL is explicit that the corpus fund is non returnable, because the amount belongs to the building and not to any specific person, so when you sell your flat the fund stays with the apartment owners association rather than coming back to you as cash. What you can do is factor the amount into your resale price, effectively recovering it from the next buyer who inherits the same protected cushion. This is why the corpus and sinking funds are best thought of not as deposits you will reclaim, but as part of the true cost of owning in a well maintained building. The money does not disappear; it simply belongs to the building's future rather than your bank account. It is worth pausing on why this design is sensible rather than unfair. If corpus money were refundable to each departing owner, a building would be drained a little every time a flat changed hands, leaving the reserve thinnest exactly when an ageing tower needs it most. By tying the fund to the apartment instead of the person, the rules keep the cushion whole across every sale, so the family living there in year twenty benefits from money paid in by an owner who moved out in year five. You are, in effect, both a contributor and an eventual beneficiary of a fund that outlives any single ownership.

Who controls these funds, and what does Karnataka law say?

Control is the part buyers should watch most closely. In Bengaluru, apartment maintenance and these funds are governed mainly by the Karnataka Apartment Ownership Act 1972 and the Societies Registration Act, and the builder is obliged to transfer any corpus or sinking fund collected from buyers to the residents' body once it is formed. This is not merely convention. In a documented case reported by the Real Estate Law Journal, Karnataka RERA ordered the developer of a project to transfer the entire corpus fund, amounting to 62.26 lakh rupees, to the resident welfare association within 60 days, grounding the direction in the Karnataka Apartment Ownership Act 1972. The lesson for a buyer is that these funds are meant to reach the owners' association, and a developer sitting on them after handover is a problem the law recognises. Getting the association formed, as our guide to KAOA apartment association registration explains, is the step that gives residents control of their own money.

The table sets the two funds side by side on what actually matters to a buyer and an owner, so you can tell at a glance which charge you are being asked to pay and what it protects.

How should a buyer treat these funds before purchase?

Treat them as a real, non refundable cost and a signal of how the building will be run. Ask the developer, in writing, exactly what corpus and sinking fund amounts you will pay, on what basis they are calculated, and when they fall due, so there is no surprise demand note at handover. Ask where the money will be held and confirm the sale agreement commits the builder to transferring it to the owners' association once formed. A building with a healthy, properly transferred corpus is one that can absorb big future costs without repeatedly hitting owners with emergency collections, which is a genuine quality signal. Weigh these charges alongside the ongoing maintenance our guide to common area maintenance charges covers, and compare projects such as Adarsh Lumina on the full picture of what living there will cost, not just the sticker price.

What should your corpus and sinking fund checklist cover?

1. Ask in writing for the exact corpus and sinking fund amounts and how each is calculated.
2. Confirm when each is payable, so a large one-time corpus does not surprise you at handover.
3. Check the sale agreement obliges the builder to transfer the funds to the owners' association.
4. Understand that neither fund is refundable to you personally when you sell the flat.
5. Ask where the corpus principal is held and whether only its interest is used for maintenance.
6. Confirm the plan for the association's formation so residents gain control of the money.
7. Factor these non refundable costs into your true cost of ownership before you commit.

Are corpus and sinking funds worth paying?

For a home you plan to live in, yes, provided they are properly held and transferred. It is tempting to see a large one-time corpus as just another charge inflating the cost of a flat, but the alternative is a building with no reserves, where every major repair triggers a scramble for money from owners who may not have it. A funded building ages gracefully; an unfunded one lurches from crisis to special collection. The honest framing is that these funds are the price of not being surprised later, and the risk is not paying them but paying them into a developer who never hands them over. That is why the real protection is not the fund alone but the paperwork and the association behind it. Pay the corpus, but make sure it reaches the people who will one day need to spend its interest, which is you and your neighbours.

Is the corpus fund refundable when I sell my Bengaluru flat?

No. The corpus fund is non returnable because it belongs to the building, not to any individual owner, so it stays with the apartment owners association when you sell. You can, however, factor the amount into your resale price and recover it from the next buyer, who then inherits the same protected cushion for the building's future.

What is the difference between a corpus fund and a sinking fund?

A corpus fund is a one-time payment whose principal is kept intact so only the interest is spent, while a sinking fund is collected periodically and its principal is deliberately spent on major repairs like lift replacement, waterproofing, or structural work. The corpus lives on its interest; the sinking fund is drawn down for big expenses.

Does the builder have to hand over the corpus fund?

Yes. Under the Karnataka Apartment Ownership Act 1972, the builder must transfer collected corpus and sinking funds to the residents' association once it is formed. Karnataka RERA has ordered developers to transfer the entire corpus, in one case 62.26 lakh rupees, to the association within 60 days, so a builder withholding these funds is acting against the law.

How much is the corpus fund in a Bengaluru apartment?

It varies by project and is often charged per square foot. One illustration puts it at 72 rupees per square foot, or 72,000 rupees for a 1,000 square foot flat paid once, though the rate differs across builders. Ask your developer in writing for the exact amount and basis, since there is no single fixed figure across projects.

Last updated 2026-07-11. PropNewz Team.