No, you don't need to register for CIS Reverse Charge. If you supply specified services that are reported under the Construction Industry Scheme (CIS) then simply you need to apply the reverse charge, however there is no need to register with HMRC beforehand.

HMRC advise: "It will only apply to individuals or businesses registered for VAT in the UK (although it will not apply to consumers). This will affect you if you supply specified services that are reported under the Construction Industry Scheme (CIS)."

More information

• CIS Help Centre
• CIS Reverse Charge overview
• CIS Reverse Charge common questions
• How will the new CIS Reverse Charge work in my software?
• HMRC Policy Paper
• Edit your invoice layout to show Domestic Reverse Charge

[BCB:103:Limitless - 50 Accounts - Construction Industry Scheme:ECB]