Construction Industry Scheme, monthly
Monthly CIS returns for contractors and refund claims for subcontractors.
Deductions, returns and refunds
CIS puts the compliance burden on contractors and the cash flow burden on subcontractors. Contractors must verify every subcontractor and file monthly, with penalties starting the day after the deadline. Subcontractors frequently overpay through deductions at source and are owed a refund. We handle both sides.
What is included
- Contractor and subcontractor CIS registration
- Subcontractor verification with HMRC
- Monthly CIS300 return preparation and filing
- Payment and deduction statements for subcontractors
- Refund claims and gross payment status applications
How it works
- New subcontractors are verified with HMRC before their first payment.
- Deductions are calculated at the correct rate for each one.
- The monthly return is filed by the 19th and statements issued.
- For subcontractors, we reclaim any overpaid deductions at year end.
A single late CIS return costs £100 immediately, rising steeply from there. The monthly rhythm matters more than the amounts involved.