How do billing in building construction projects
Greeting for the day!!
As you have a very general question over the billing without specifics of Client Billing or Sub-contractor billing, will go through both.
Firstly billing starts with quantity surveying for which you can refer IS-1200 and for BBS IS-2502.
For Client billing,
-Billing cycle could be 15days, month or milestone based.
-Generally for small project less than 5cr. billing is generally milestone based.
-While for bigger projects of scale over 50cr. billing is Monthly or 15days depending on your contract and negotiation with the client.
-For client billing, you have to identify all the works you have done based on your BOQ and if some extra work is done upon approval from the client the same should be billed.
For subcontractor billing,
-The same process is followed starting from quantity survey and paying off the work every work carried out for the period.
-For subcontractor billing of schedules works, always take care that you pay what client is paying you apart from some specific cases.
Also it is always advisable to bill cumulatively in every bill,
(this bill) = (total billed) - (last billed)