Use the Construction Industry Scheme (CIS) online service

Sign up or log in to file your monthly returns as a CIS contractor, or to verify a subcontractor.

Online services may be slow during busy times. Check if there are any problems with this service.

Start now

Before you start

You’ll need your:

  • email address
  • Employer Reference Number (ERN)
  • 13-digit Accounts Office reference number

Call HMRC’s Online Services Helpdesk if you have problems signing up.

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