The Construction Industry Scheme (CIS) is a tax deduction scheme which involves contractors and subcontractors in the construction industry. Implemented by HM Revenue & Customs (HMRC) in the United Kingdom, CIS is designed to minimize tax evasion within the construction sector by ensuring that contractors deduct money from a subcontractor’s payments and pass it to HMRC. These deductions count as advance payments towards the subcontractor's tax and National Insurance.