HMRC CIS contact number
The CIS line covers Construction Industry Scheme registrations, deductions, returns and subcontractor verification for contractors and subcontractors.
Checked against gov.uk on 14 September 2026
CIS general enquiriesLocal rate
Other ways to call
From outside the UK: +44 161 930 8706
Have this ready before you call
- Your Unique Taxpayer Reference (UTR)
- Your National Insurance number
- Your CIS registration details, if registered
Common questions
Can I register for CIS on this number?
Not as a subcontractor: registration happens online or by post. The line handles questions about registrations, deductions and monthly returns.
Is the CIS line free?
It is a standard-rate 0300 number: the same cost as calling a landline, inside inclusive minutes on most plans.