Class 3 NIC Contributions 2012/2013 17 Apr 2012 Gemma Latest News, Rates and Allowances No comment Class 3 National Insurance Contributions are voluntary and the rate is:- £13.25 per week Related posts: Personal Allowances 2012/2013 Class 1 NIC Contributions 2012/2013 Standard PAYE 2012/2013 Coding Notice Class 4 NIC Contributions 2012/2012 Class 2 NIC Contributions