Sign in to the Construction Industry Scheme (CIS) online service
Call HMRC if you have a general query about the Construction Industry Scheme.
Before you call
This helpline may ask you some security questions. Make sure your personal details and address are up to date in your personal tax account or you could fail telephone security. If you do not already have a personal tax account, you can set one up.
Our phone line opening hours are:
Monday to Friday: 8am to 6pm
Closed on weekends and bank holidays.
You can also find out information in your business tax account using HMRC online services.
Registering if you’re a contractor
If you’re a contractor you’ll need your Unique Taxpayer Reference (UTR), accounts office reference or PAYE reference.
If you do not have a UTR you can register for Self Assessment to get one.
Registering if you’re a subcontractor
If you’re a subcontractor you’ll need your UTR or National Insurance number.
Registering if you’re a company secretary
If you’re a company secretary you can register a company as a subcontractor under the Construction Industry Scheme using form CIS305.
Find out about call charges
Write to HMRC for general enquiries about the Construction Industry Scheme, or to appeal against a Construction Industry Scheme penalty.
You do not need to include a street name, city name or PO box when writing to this address.
Couriers should use a different address.