A detailed checklist for CIS remittance compliance can be found within your self-certification audit, found on your Student Profile Page.
This checklist will help you:
- Verify that all legally required elements are present in each remittance.
- Ensure that subcontractor payments align with CIS and HMRC compliance standards.
Audit Flexibility
As with PAYE compliance, there is no prescribed format for conducting a CIS audit. Use the information provided as a framework to build a tailored process that suits your organisation’s structure and risk profile.
It is essential to ensure that CIS remittance records are kept for at least 3 years after the end of the tax year (HMRC minimum). Many organisations retain CIS records for 6 years to align with wider accounting/VAT practice.
Ask yourself these questions:
Does the statement include the required items: gross amount paid for labour (excluding VAT), cost of materials set off, CIS deduction (20%/30%), net payment, contractor name and tax month, and—where the 30% rate is used—the HMRC verification number?
Are CIS deduction rates clearly stated, and are they compliant with HMRC thresholds (i.e., 20% for verified, 30% for unverified subcontractors)?
Has the subcontractor been verified with HMRC before first payment, and are UTR/verification records retained in your files? (Note: the UTR isn’t mandatory on the subcontractor’s statement.)
Are all earnings and deductions clearly itemised, ensuring full transparency for the subcontractor?
Are remittance statements issued in a consistent, standardised format to help subcontractors track their payments and deductions?
Are statements issued by the 19th following the tax month in which deductions were made?
Do CIS300 monthly returns reconcile to statements and bank payments for each tax month?
Are remittance records kept for at least 3 years after the end of the tax year to meet HMRC requirements?
Are copies of all remittance statements readily accessible in the event of an HMRC compliance review?