St on rent -? basic limit -criteria rent payer / receiver

I am a e-TDS Return filer.  Sometimes clients ask me about the basic limit on service tax + +

Now my doubt is i have some well established organisations paying service tax on a rent of Rs 15/20,000 to ......

What is the basic limit...!

basic limit rule applies to service receiver / service provider. 

The threshold exemption limit per service provider is Rs. 10 Lakhs.