Corpus Fund Calculator
A larger building costs more to run. Derive a corpus that genuinely covers your future maintenance, instead of accepting a round number the builder offers.
A defensible corpus covers the higher maintenance of a larger, lift-and- amenity building for a fixed horizon - derive it, don't accept a round number from the builder.
What this calculator assumes
The corpus fund is meant to cover the extra running cost of a bigger, amenity-loaded new building over your old one, for a defined period, not to be a one-time goodwill payment. A flat with a lift, security, landscaping and a clubhouse simply costs more per square foot to maintain than your current building, and that gap compounds every month for years after possession.
This tool projects your new flat's monthly maintenance at a rate you set, multiplies it out over a horizon you choose, and adds a cushion percentage for the inflation that maintenance costs reliably see. The result is a number you can show your committee as derived, not negotiated down from a builder's opening offer.
For a fuller comparison across multiple builder offers at once, including how each one's corpus actually stacks up against its real running cost, see the Redevelopment Offer Evaluator.
Part of Stage: Vacating in the redevelopment journey. See the full stage →
Editorial, not legal or financial advice. Consult your own advisors before deciding. This calculator is indicative and uses simplifying assumptions; confirm specifics for your project with your PMC and advisors. Nothing you enter here is stored or sent anywhere, it runs entirely in your browser.