Sushmita,
There is no standards in % wise. Normally 40% of CTC may be apportioned as Basic. The more basic the more advantage for the employees as they will have good contribution towards PF and other retiral benefits. 40% of basic may be fixed as HRA for non-metros and in case of metros 50% of basic as HRA. This HRA is tax exempted for the amount exceeding 10% of basic, subject to the production of rent receipts.
Conveyance allowance - Rs.800/-p.m (tax free, no proof required), Medical-Rs.1250/- P.M (tax free subject to production of bills), Child Edu Allowance -Rs.100/-p.m. per child (max 2 children, tax exempted), Food coupons - 2700/-p.m (tax free in FY2011-12), Gift vouchers - Rs.5000/- p.a. (tax exempted). Remaining may be put into basket of spl. allowance.
PF - 12% may be deducted from the basic towards employer contribution if it is part of the CTC.
pon