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.
Start now on the HM Revenue & Customs (HMRC) website
Before you start
If you’re an existing user, just log in from the page on the HMRC website.
If you’re new to HMRC Online Services:
Use the ‘register’ link.
On the next page, use the ‘sign up to HMRC Online services’ link.