Dear Ankit Jain,
Your query is not very clear. There is no method for calculation of basic, rather basic is itself a components of wages or salary. The wages have been defined differently in each of the enactments, as such, you have to refer the particular enactment to know the components. For instance the Payment of Wages Act, 1936 includes all remuneration (whether by way of salary, allowance or otherwise) expressed in terms of money or capable of being so expressed to fulfill the terms of employment.
BS Kalsi
Member since August, 2011