As your construction accountant, I’ll walk you through the essential year-end procedures for CIS to ensure compliance and maximise tax efficiency.
Year-End Timeline
Key Dates
- 5 April: Tax year end
- 19 April: Final monthly return
- 31 January: Self-assessment deadline
- Company year-end varies
Critical Tasks
- Final returns submission
- Records reconciliation
- Statement verification
- Payment reconciliation
- Systems review
Year-End Checklist
Documentation Review
- CIS statements
- Payment records
- Verification details
- Monthly returns
- Dispute records
Financial Reconciliation
- Payment totals
- Deduction calculations
- Material costs
- Outstanding amounts
- Refund claims
Compliance Requirements
Contractor Obligations
- Complete returns
- Issue statements
- Reconcile payments
- Update records
- Review systems
Subcontractor Needs
- Collect statements
- Calculate deductions
- Prepare tax returns
- Plan refunds
- Review status
Best Practices
Preparation
- Early planning
- Regular updates
- System checks
- Staff training
- Professional advice
Implementation
- Systematic approach
- Clear timeline
- Regular reviews
- Documentation
- Quality checks
Common Year-End Issues
Record Problems
- Missing statements
- Incomplete records
- Calculation errors
- System failures
- Lost documents
Timing Issues
- Late submissions
- Delayed reconciliation
- Missing deadlines
- Processing delays
- System updates
Need More Help?
In our next post, we’ll cover “What is gross payment CIS“.
Stay compliant and profitable,
Want CIS off your desk?
We run CIS end to end for construction limited companies turning over £500,000 to £5 million. Verification, monthly returns, deduction statements and the year end reconciliation.
Common questions
What has to be reconciled at the CIS year end?
The deductions taken off your invoices through the year have to agree to three things: the payment and deduction statements your contractors issued you, your own records, and what HMRC holds on your account. Where they disagree, the difference usually sits unclaimed. For a company the CIS suffered is set against PAYE liabilities through the Employer Payment Summary, so getting the figure right affects real money.
What is the deadline for the last CIS return of the tax year?
The monthly return covering the period to 5 April is due by 19 April, the same as every other month. There is no separate annual CIS return. What changes at the year end is the reconciliation work and, for companies, making sure the CIS suffered claimed through the EPS matches the deduction statements you hold.