Do I need to pay the GST in spite of not crossing the 20 lakh income?

I am the owner of a small private limited company based out in Banglaore. I have a small security agency and my income per month is around 2.5 lacks from 2 of my clients. My question is, I have not yet got the GST registration done as my income hasn't been crossed more than 20 lakhs. And, now, if I get the GST registration, do I need to pay the GST in spite of not crossing the 20 lakh income?

As per your statement your Income is Rs.2.5 Lakh per month that mean you annual income are more than 20 Lakh and according to GST ACT your services are not covered under reverse charge.
## what is GST rate for Security Services and cleaning contract persons?
Exactly, the rate is 18% and it is not covered under reverse charge now.
GST registration is required primarily if your annual sales are more than Rs. 20 Lakh. Even if your sales are less than Rs. 20 Lakh, we suggest that you voluntarily opt for GST registration because:
1.You will not get any tax refunds on purchases (e.g. if you buy goods worth Rs 1 lakh in a year, and tax
rate is 28% – you will lose tax refund of Rs. 28,000)
2.You cannot sell outside your state
## You can visit the following link for more Information-
Read more --http://www.gstsoln.com/latest-schedule-gst-rates-services-approved-gst-council/
Read more at: Gst on manpower supply - GST Forum
Regards,
Amit

Dear Amit Sir,
He has a security agency and have no connection to sales. Simple question were you registered in service tax? if yes , You have to have GST registration. This is specifically for your case.