| Stage | Amount | Tasks required for billing | Master billing date |
|---|---|---|---|
Foundation | ₹6,00,000 | Footings and plinth | 31 Jan |
Slab | ₹7,00,000 | Ground floor slab | 28 Feb |
Brickwork | ₹5,00,000 | Brickwork, ground floor; Brickwork, first floor | 10 May |
Task completion makes the stage ready to bill; it does not issue a bill. Agreed payment due-date rules stay separate.