In our experience builders (and other affected tradespeople) want to get on and do their job, not sit at a desk trying to work out how to complete their CIS tax returns once a month!  Alongside our payroll filing service, we can assist clients who are affected by CIS by either providing advice on how to complete the relevant returns (to include consolidating any arising refund due into the any PAYE/NIC liability of the business where applicable) or by stepping in and drafting the relevant CIS tax returns from start to finish.  We can also advise on registering into the CIS system and whether there is scope to apply for 'gross payment status'.