GST late payment interest

You can calculate GST late payment interest as per following way:

Due Date. 20.06.18

GST paid. 24.06.18

You are liable to pay interest from 21.06.18 to 24.06.18 (4 days)

Its per day ... 20/- & 50/-

20/- for nil return
50/- for return with data

According to the GST Penalty regulations, an interest will be charged at the rate of 18 percent per annum from the taxpayers who fail to pay their taxes on time. The interest will be levied for the days after the due date.

For GSTR 3B returns late fee as following... 

If Nil Return - Rs 20 per day (CGST Rs 10 and SGST Rs 10)

Other than Nil return Rs 50 per day (CGST Rs 25 and SGST Rs 25)

What is the maximum amount for late filling and payment fee?

ITS MAXIMUM RS 10000/- (CGST -5000/- + SGST 5000/-)