I agree fully with D. Mohan; salary split-up differs from one organization to another. With my knowledge in Compensation Management, I can suggest that the best compensations are those that reduce the tax burden of individuals. Thus, the compensation structure generally changes as per the Annual Budget. For example, the abolition of Fringe Benefits played a huge part in redefining the compensation structure.
Basic Component and Related Allowances
Generally, there is a Basic Component (usually 30-50% of FCC - Fixed Cost to Company) to regulate the other salary components related to Basic like PF, HRA. HRA or Site Allowance (40-50% of Basic, can save Tax), Other Allowances (the list is huge, including Children Education (Max 2400), Medical Allowance (subjected to Max 15000 per year), LTA - Leave Travel Allowance (Max 1 month's Basic). There can be reimbursements as well, such as Fuel & Vehicle (Max 2 months' Basic) / Helper, etc.
Statutory Deductions
Other than these, there are statutory deductions like PF (12% of basic) and gratuity (4.8%), which are mandatory. The rest of the balancing figure is the Special Allowance OR Discretionary Management Allowance (can be named more aesthetically). Variable Pay/Reward Pay comes after this and is generally fully taxable.
I am just sharing some ideas. It's a complicated subject to address through emails. Compensation itself is a discipline in HR and is fast-changing. You need to formulate your organization's compensation after discussions with the Management.
Hope I have shed some light.
Thanks.
Regards,
Debapratim Guha