Booklets
- CA38 (Standard Table Letters A, H, J, M and Z)
- CA40 (Employee-only Contributions)
- CA41 (Reduced-Rate Table Letters B and C)
- CA42 (Foreign-going mariners and deep-sea fisherman)
- CA44 (Company Directors)
- CWG2 (Further guide to PAYE and NICs)
- HMRC internal National Insurance Manual (NIM).
- CWG5 (Class 1A National Insurance contributions on benefits in kind)
- Payroll Publications for employers