Internal audit applicable for following companies as per section 138 of companies Act 2013 as below:
1)Every listed company
2)For unlisted public companies:
a)paid-up share capital greater than or equal to Rs.50Crore during a previous financial year.
b)Turnover greater than or equal to Rs.200crore
c)Outstanding loan from bank/PFI greater than 100crore during the previous financial year.
d)Outstanding deposit greater or equal to Rs.25crore at any time during a previous financial year.