Hi Veda,
I think there is no confusion in your querry but in the answers.
In Karnataka the professional tax of Rs 2,500/- per annum to be paid for each location situated within Karnataka. In other words, if a PVt Ltd. or Ltd. company has no branch offices with in Karnataka, such company has to pay Rs.2500/- per year being employer registration fee and if any Pvt.Ltd./Ltd. company is having different brach offices within the state of Karnataka, in such cases, the company will pay Rs.2500/- being employer registration fee for each location.
From the answers it seems most of the repondents are confusing employee contribution of PT and Employers' regn fee.
You could have mentioned the location of your office avoid the above confusions.
rgds
nair