Construction Industry Scheme: general enquiries
Call or write to HMRC if you're a contractor or subcontractor within the Construction Industry Scheme for help with queries on the scheme, getting forms and leaflets, and using CIS online.
Online
Sign in to the Construction Industry Scheme (CIS) online service
Ask HMRC’s digital assistant to get a quick answer to your query about the Construction Industry Scheme. If the digital assistant cannot help you, you can ask to transfer to an HMRC adviser if they’re available.
You can find out information in your business tax account using HMRC online services.
Phone
Call HMRC if you have a general query about the Construction Industry Scheme.
You cannot register for the Construction Industry Scheme as a subcontractor over the phone.
Find out how to register as a subcontractor online or by post.
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 have a personal tax account, you can create one before you check your details.
Telephone: 0300 200 3210
Outside UK: +44 161 930 8706
Opening times: Monday to Friday, 8am to 6pm. Closed bank holidays.
Post
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.
PT Operations
HM Revenue and Customs
BX9 1BX
United Kingdom
Related content
Guidance
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Construction Industry Scheme (CIS)
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What you must do as a Construction Industry Scheme (CIS) contractor
- What you must do as a Construction Industry Scheme (CIS) subcontractor
HMRC contacts
Updates to this page
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The information about industrial action between 23 December 2024 and 6 June 2025 has been removed as the action has now ended.
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First published.