CIS deductions: the construction tax rules contractors keep getting wrong
The Construction Industry Scheme catches out more contractors than any other UK tax regime. Not because the rules are complicated in theory, but because the details that matter are the ones nobody explains at signup: what counts as construction work, when the deduction applies, and what happens to the money HMRC holds. Here is the practical version. Who the scheme actually covers CIS applies to contractors and subcontractors doing construction work in the UK. "Contractor" here does not mean self-employed person in the general sense; it means the business paying for construction operations. That includes builders, but also businesses like property developers and even some housing associations that spend enough on construction work. Subcontractors include sole traders, partnerships, and limited companies doing the work. If you are a subcontractor in construction and you are not registered for gross payment status, the contractor must deduct tax from your payments before payin...