How the designated account works
RERA was written to stop money collected from buyers of one project being spent on another. The mechanism is the designated (often called escrow) account: 70% of every rupee realised from allottees goes into it, and comes out only against the land and construction cost of that project, in step with how much of the project is actually built.
In practice a promoter's finance team tracks three numbers: how much has been deposited, how much the certified completion entitles them to withdraw, and how much has already been withdrawn. The difference between the last two is what the next withdrawal application can ask for.
The calculation
Designated account = 70% × amounts realised from allotteesCumulative entitlement = designated account × certified completion %Withdrawable now = cumulative entitlement − already withdrawn
Cost incurred to date (land + construction cost × completion) is shown alongside because some authorities, and most bankers, reconcile withdrawals against cost incurred rather than against completion alone. If the two diverge sharply, expect the chartered accountant's certificate to be questioned.
What counts as completion
Percentage of completion is certified by the project engineer and architect on the physical work, and by a chartered accountant on the cost. Land cost is usually treated as 100% incurred at registration, which is why early withdrawals on a project with expensive land can be substantial even at low construction progress. Several states (Maharashtra among them) use prescribed certificate formats — Form 1, 2 and 3 under MahaRERA — and update them periodically.
Planning around it
Fast sales with slow construction leave cash locked in the account; slow sales with fast construction leave the account short of the cost it is meant to fund. The sales velocity calculator gives the collections side of that picture. Together they tell you whether the next quarter's construction is funded by buyers or by the lender.
This calculator is a planning aid and not a substitute for the certificates or for state-specific rules. Use it to size the next application before the auditors do.