Use the Construction Industry Scheme (CIS) online service

    Sign up or log in to use the Construction Industry Scheme (CIS) online service – you can use it to file your monthly returns as a CIS contractor.

    If you’re an existing user, just log in from the page on the HMRC website.

    If you’re new to HMRC Online Services:

    1. Use the ‘register’ link.
    2. On the next page, use the ‘sign up to HMRC Online services’ link.