On an apartment cost sheet, you may see two lines that sound almost the same: "corpus fund" and "sinking fund". Both are savings for the building, and both come out of your pocket. But they do different jobs, they are collected differently, and they matter at different times in your life as an owner. This guide explains each one in plain words, shows the arithmetic with illustrative numbers, and lists what to check before you book and at handover.
Corpus fund: a one-time payment
A corpus fund is a lump sum you pay once, usually at or just before handover. It is meant to be passed to the residents' association and kept as a long-term reserve for the community. It is not a monthly fee, and it is not the same as advance maintenance, which pays running costs for the first few months.
The amount is usually set as a rate per square foot or a fixed sum per home, and it should appear in your agreement for sale or cost sheet. If it is in the agreement, it is part of what you agreed to pay.
Sinking fund: saving for big repairs
A sinking fund is money set aside regularly, often as part of maintenance, to pay for big future repairs. Lifts, pumps, generators, waterproofing and exterior painting all wear out. Instead of asking every owner for a large sum when a lift needs replacing, the community saves a little each month so the money is ready when the day comes.
A simple way to see it
Think of your own household. The corpus is the emergency fund you start with. The sinking fund is the money you put aside each month because you know the fridge, the car and the roof will one day need replacing. One protects against the unexpected. The other plans for the expected.
A worked example (illustrative numbers)
These figures are invented to show the arithmetic. They are not Reeva's charges.
Corpus: say a community collects ₹50 per square foot as corpus, on an area of 1,100 square feet. Your share is 1,100 × ₹50 = ₹55,000, paid once. If there are 60 homes of similar size, the community starts with 60 × ₹55,000 = ₹33 lakh in reserve.
Sinking fund: suppose the community expects to replace its lifts in about 15 years at an estimated cost of ₹30 lakh. To have that money ready without interest, it must save ₹30,00,000 ÷ 15 = ₹2 lakh a year. Split between 60 homes, that is about ₹3,333 per home per year, or roughly ₹278 a month. Add other big items, such as pumps and painting, and you see why a monthly contribution makes sense.
If the fund earns interest, the monthly amount can be a little lower. If costs rise faster than expected, it needs to be a little higher. That is why the association should review it every year.
Step by step: how a sensible sinking fund is planned
- List the big items. Lifts, generator, pumps, STP equipment, waterproofing, exterior paint, gates.
- Estimate when each will need replacing. Use the maker's guidance or a facility manager's advice.
- Estimate the cost of each. Get today's quotes and allow for prices rising.
- Divide cost by years. That gives a yearly saving target per item.
- Add them up and split between homes. By area or equally, as the association decides.
- Review yearly. Update estimates and the contribution in the annual general meeting.
What happens when there is not enough saved
If a community saves too little, a big repair arrives with no money set aside. Owners then face a sudden one-time demand, or the repair gets delayed. Neither is good for the building, for daily life or for resale value. A buyer of a resale flat in such a building may also inherit a large pending bill.
Who looks after these funds
Before the association is formed, the builder holds the money. Section 11(4)(e) of the Real Estate (Regulation and Development) Act, 2016 (RERA) asks the promoter to enable the association to be formed. Section 17 requires the promoter to hand over the common areas and related documents to the association. The funds collected for the community should be transferred too, with clear accounts. After that, the association manages them under its by-laws, and members can ask for statements at the general meeting.
Common mistakes first-home buyers make
- Mixing up corpus and advance maintenance. They are separate lines. Ask for each figure.
- Forgetting to budget the corpus. It is usually due in cash near handover, alongside registration costs.
- Assuming the corpus is refundable. It generally belongs to the community, not to you, even if you later sell.
- Not asking where the money sits. A separate bank account with statements is what you want to see.
- Treating a low sinking fund as a saving. It is often a bill postponed.
Checklist: before you book
- Is a corpus fund charged? How much, and on which area?
- Is it in the agreement for sale or only on a cost sheet?
- When is it due: at handover, or with an earlier instalment?
- Will there be a sinking fund, and how will it be collected?
- When will the association be formed?
Checklist: at handover
- How much was collected as corpus, and from how many homes
- Whether the money is in a separate account
- Any interest earned on it
- A statement showing the transfer to the association
- The plan for the sinking fund, and who will review it
How these funds show up in your first-year cash plan
First-home buyers often plan carefully for the down payment and EMI, then get caught by the handover bills. Here is an illustrative list of what can fall due in the same few weeks, using the example figures above:
- Corpus fund: ₹55,000, once
- Advance maintenance: say 12 months at ₹4,400 = ₹52,800
- Stamp duty and registration on the sale deed, as per Karnataka's schedule
- Utility deposits for electricity and water connections
- Basic furnishing so you can actually move in
In this example, corpus and advance maintenance alone come to ₹1,07,800. Your home loan will usually not cover these, so they need to come from savings. A simple habit helps: open a separate savings account a year before possession and move a fixed amount into it every month. When the handover letter arrives, the money is waiting.
After you move in, the sinking fund contribution becomes part of your monthly maintenance bill. It is small each month, but it is one of the best protections your building has.
Buying a resale flat?
Ask the association how much is in its funds and whether a big repair is due soon. Ask to see the last audited accounts. A healthy fund can save you a surprise bill later, and a thin one is something to factor into your offer.
The short version
The corpus is a one-time starting reserve. The sinking fund is a steady saving for repairs everyone knows are coming. Ask about both, budget for both, and make sure both end up with the residents' association with proper accounts. If anything on the cost sheet is unclear, ask for it to be explained in writing before you pay the booking amount, not after.
New to all this? Our first home guide walks you through every step, from saving to registration.
