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 on the HMRC service
Before you start
If you’re new to HMRC online services:
Use the ‘register’ link on the next page.
Choose ‘sign up to HMRC online services’.
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.