RCM applicable on pf esi consulting charges

THANKS ..............

consultant was lawyer?

Dear sir/madam i am a epf and esic consultant should i reg gst ?  my clients usually transfer the amount to be credited to there employee to my bank account . and i will pay it via internet banking example : total cont of 20,000 should be paid and i will generate challan and then my client pay me 21,000 ( 1000) as fee.

so do gst reg is mandatory for me ?