1 Overview of the National Insurance system
2 Categorisation of earners
3 Class 1 National Insurance contributions
4 Class 1A National Insurance contributions
5 Class 1B National Insurance contributions
6 Class 2 National Insurance contributions
7 Class 3 and Class 3A National Insurance contributions
8 Class 4 National Insurance contributions
9 International considerations
Appendices
Appendix 1 Class 1 NIC rates and thresholds
Appendix 2 Class 1A NIC rates
Appendix 3 Class 1B NIC rates
Appendix 4 Class 2 NIC rates
Appendix 5 Class 3 NIC rates
Appendix 6 Class 3A Voluntary NIC rates
Appendix 7 Class 4 NIC rates