Unibuild handles CIS in the same system that holds your subcontract orders, invoices and payments, so there is no second version in a spreadsheet. Each subcontractor carries their UTR, verification reference and HMRC-confirmed deduction rate. Deductions are calculated on the labour element only, with materials, third-party plant hire and VAT excluded automatically. Payment and deduction statements generate and issue within the deadline. Periods run to HMRC tax months, 6th to 5th, and each closes into a complete CIS300 return pack, nil returns included, ready for your accountant to file. CIS suffered on your own sales invoices is recorded alongside the domestic reverse charge. The rates are explained in our
guide to CIS deductions for UK contractors.