How do I claim a CIS refund if I have lost my CIS statements?

How do I claim a CIS refund if I have lost my CIS statements? Ask each contractor for a duplicate statement first. If you cannot get one, write to HMRC with the contractor's details and payment dates, then claim as normal on your tax return. For 2025-26, the deadline is 31 January 2027. Yes. You claim on your tax return by entering your total pay before deductions and total deductions. You do not send statements with the return, but HMRC may ask for evidence, so get duplicates or write to HMRC before you file. Yes. GOV.UK says to ask your contractor for a replacement. CIS 340 says a duplicate must be clearly marked Duplicate. Write to HMRC at PT Operations, HM Revenue and Customs, BX9 1BX. Give your name, address and UTR, the contractor's name and address, their tax reference if you know it, the payment dates or tax months, and why you have no statements. Read the full answer, with every source, at rightotax.co.uk.