Corpus Fund and Sinking Fund: Two Different Pots, Two Different Jobs

Corpus and sinking fund are used interchangeably in sales conversations, in handover statements, and occasionally by developers who should know better. They are not the same thing. One is a capital base collected once; the other is a liability being funded gradually. Confusing them is how a community reaches year eight with a large-sounding fund and no money for the lifts.

Corpus: the one-time contribution

A corpus fund is a lump sum collected from each buyer, ordinarily around handover, and held as the community's own capital. The intention behind it is that it is preserved rather than consumed: it sits in the association's name, it earns whatever a conservative deposit earns, and the income can support the running budget. In many communities it is also the buffer that lets the association pay a contractor in a month when collections are short.

Three things are worth establishing about it before you pay it.

• Its basis. Is it a fixed amount per home, or computed on area? A community that collects on area and then spends per household has already built in a distribution question.
• Who holds it, and where. Before the association exists, the promoter does — on the terms in your agreement. Those terms should say what account it sits in and on what basis it is transferred.
• What it may be spent on. A corpus that is quietly used to plug operating deficits is not a corpus; it is deferred maintenance with a nicer name.

Sinking fund: an accrual, not a reserve

A sinking fund is money set aside every month for the replacement of assets that will certainly wear out. The word that does the work is accrual: you are not putting spare money aside in good years, you are recognising a cost that has already begun to be incurred, because a lift that will need replacing after a known working life is consuming a share of its replacement cost every year it runs.

That framing is the difference between a community that plans and one that reacts. Under the accrual view, a fifteen-year-old building with no sinking fund is not a community that has been thrifty. It is one that has been running an unrecognised liability for fifteen years, and the bill is now due in a single lump.

How a sinking fund is sized

Properly done, this is arithmetic rather than judgement, and it is done in four steps.

1. Inventory the assets. Every major item the association will one day have to replace, listed with its make, capacity and date of commissioning. Lifts, pumps, the diesel generator, the sewage treatment plant, the fire system, transformer and panels, the roof and terrace waterproofing, the internal roads, the facade finish, tanks, and the gate and access systems.
2. Assign each an expected working life, taken from the manufacturer's guidance and the maintenance history rather than from optimism.
3. Estimate the replacement cost on a replacement basis, not an original-cost basis. What matters is what it will cost to replace the thing when it fails, not what the developer paid for it.
4. Divide. Replacement cost, spread across remaining life, aggregated across the inventory, divided on the community's chosen basis. That is the monthly accrual — and it is why a well-run association can tell you where its sinking fund number came from, line by line.

No figure appears in this post because no figure can honestly be given for somebody else's community: the answer depends on that community's asset list, its ages, and today's replacement prices. What can be given is the method, and the method is what lets you tell a real number from a plausible one. Ask to see the inventory. A community that has one is thinking about year twelve. A community whose sinking fund is a round number per square foot with no working behind it has picked a figure that felt reasonable.

The assets that dominate the schedule

In practice a handful of items account for most of the eventual spend, and they share an inconvenient property: in a building where everything was commissioned at once, they age together.

• Lifts. The largest single replacement in most residential towers, and the one with the least tolerance for deferral.
• Pumps and the plumbing that runs on them, including fire pumps, which are inspected and cannot quietly be left in a poor state.
• The diesel generator and the electrical panels, which age whether or not they are used.
• Waterproofing — terraces, basements, and podiums. Cheap to renew on schedule and expensive to renew after it has failed, because by then you are also repairing what it protected.
• The sewage treatment plant, whose civil structure outlasts its mechanical and electrical parts by a wide margin, which is why it needs a component-level line rather than one entry.
• Roads, paving and the facade, which are the visible ones, and therefore the ones a general body is most willing to fund and most likely to fund first.

What happens when a community under-accrues

The special assessment. A one-time levy on every home, decided in a general body meeting, to meet a cost the funds cannot carry. It is disruptive in three ways at once: the amount is large because it was never spread, it falls on whoever owns the home on the day rather than on the owners whose years of use consumed the asset, and it arrives in a community that is by then arguing about it.

The distributional point is the one buyers miss. If a lift is replaced in year twelve out of a levy raised in year twelve, the person who bought in year eleven pays for eleven years of somebody else's use. That is exactly the unfairness an accrual is designed to prevent — and it is a good reason for a resale buyer to care about a fund position they had no part in creating.

Who controls each fund, and when

Before handover, the promoter holds what has been collected, on the terms of the agreement, and administers the services. Section 11(4)(d) of the Real Estate (Regulation and Development) Act, 2016 deals with the promoter's responsibility for essential services until maintenance is taken over by the association of allottees; section 11(4)(e) with enabling the association's formation; and section 17(1) with handing over the necessary documents and plans, including the common areas, after the completion certificate is obtained.

After handover, both funds belong to the association, and the constituting documents govern how each may be operated — commonly a separate bank account for the sinking fund, and a resolution of the general body before it is drawn on. Which statute the association was constituted under is a matter of the documents the promoter executed: in Karnataka the candidates include the Karnataka Apartment Ownership Act, 1972, the Karnataka Ownership Flats (Regulation of the Promotion of Construction, Sale, Management and Transfer) Act, 1972, and the general law under which a society or company is registered. Read the one that applies to you, as it stands, rather than a summary of it.

What the handover statement should show

1. Corpus collected, home by home, with the total, and what was collected but not paid.
2. Sinking fund collected to date, separately from the corpus and separately from the maintenance account.
3. Interest earned on each, and the account each sat in.
4. Advance maintenance collected, the period it covered, and the unspent balance being transferred.
5. The maintenance account — receipts, payments and closing balance for the period the promoter administered it.
6. Outstanding dues from homes, aged, so the association starts with the truth rather than discovering it.
7. The asset inventory and the warranties, so the incoming committee can build the sinking fund schedule from the first month rather than from the first crisis.

If you are buying a resale

Ask for four things, and read them together: the last audited accounts, the current sinking fund balance with the working behind it, the minutes of the last two general body meetings, and whether any special assessment has been levied or discussed. A community with a documented inventory, a fund that reconciles to it, and minutes that record the argument is a well-run community, whatever its lobby looks like. One with a healthy-looking balance and no inventory has a number, not a plan.

How the monthly levy that carries the sinking fund is computed is set out in the companion post on maintenance charges. What is handed over, and when, is covered in the after-you-buy questions in our FAQ, and the communities themselves are on the project pages.