CIS Payroll in Kent: A Local Guide for Contractors and Subcontractors
Kent's construction sector is busy. From housing developments around Ashford and Maidstone, to commercial fit-outs in Canterbury and Tunbridge Wells, to major infrastructure work along the Thames Estuary and Medway, contractors and subcontractors across the county are juggling live sites with the ongoing admin of staying compliant with HMRC's Construction Industry Scheme.
That admin burden is about to get heavier. From 6 April 2026, HMRC introduced some of the most significant changes to CIS in over a decade, with stricter verification requirements, reinstated nil returns, and tougher penalties for contractors who get it wrong. If you're a contractor or subcontractor working anywhere across Kent, Sussex, Surrey, or London, here's what you need to know, and how a dedicated CIS payroll provider can take the pressure off.
What Is the Construction Industry Scheme (CIS)?
CIS is HMRC's tax scheme covering payments made by contractors to subcontractors in the construction industry. Under the scheme:
- Contractors deduct tax at source from payments to subcontractors before paying them.
- Registered subcontractors have 20% deducted; unregistered subcontractors have 30% deducted.
- Subcontractors with Gross Payment Status (GPS) can be paid in full, without deductions, and handle their own tax through Self Assessment or Corporation Tax.
- Deductions count as advance payments towards the subcontractor's tax and National Insurance liability, and can be reclaimed or offset at year end.
It's a mandatory scheme for most construction work, including building, alteration, repairs, demolition, and civil engineering, and it applies whether you're a sole trader, partnership, or limited company.
The 2026 CIS Changes: What's Different
HMRC's reforms, effective from 6 April 2026, focus on tightening compliance and closing gaps that have historically been exploited for fraud. The key changes contractors need to be ready for:
- Nil returns are back. Contractors must now submit a monthly nil return for any month in which no payments were made to subcontractors, unless they've formally notified HMRC in advance that they expect a period of inactivity. This requirement was removed back in 2015 to reduce admin, but has now been reinstated as part of the wider crackdown.
- Penalties are stricter and can be significant. Missing a nil return, or filing late, can trigger fixed penalties and, for returns that remain outstanding, additional penalties of up to £3,000 or 100% of the CIS deductions due on the return, whichever is higher.
- Gross Payment Status is easier to lose, and harder to get back. HMRC now has the power to remove GPS immediately where it believes a contractor knew, or should reasonably have known, that a payment was connected to fraud elsewhere in the supply chain, even without direct involvement in the fraud itself. Where GPS is withdrawn for fraud or serious non-compliance, contractors face a five-year bar on reapplying, up from the previous one-year limit.
- Ongoing supply chain due diligence is now expected, not optional. HMRC is placing greater weight on contractors actively monitoring who they're working with, not just verifying subcontractors once at the start of an engagement.
- Some payments to public bodies are now exempt. Payments to local authorities and certain public bodies acting as subcontractors will no longer fall within CIS deductions, simplifying that part of the process.
For contractors already filing nil returns and running solid due diligence, the practical impact is manageable. For those who've let processes slip since 2015, or who don't have a system in place for ongoing subcontractor monitoring, this is a real risk to cash flow and compliance standing.
Why Kent Contractors Should Pay Particular Attention
The South East's construction pipeline means many local contractors are working across multiple sites and subcontractor relationships simultaneously, often stretching across county lines between Kent, Sussex, Surrey, and into London. That scale brings two specific pressures:
- More subcontractors to verify and monitor, and more opportunity for a gap in due diligence to go unnoticed until HMRC flags it.
- More admin around monthly returns, particularly on sites with variable or seasonal subcontractor activity, where nil returns are easy to overlook.
With the removal of GPS now carrying a five-year reapplication bar, a single lapse in monitoring can have consequences that follow a contracting business for years, not months.
How a Local CIS Payroll Provider Helps
This is exactly where working with a payroll provider that specialises in CIS, rather than treating it as an add-on to general payroll, makes a practical difference:
- Subcontractor verification handled correctly, every time: confirming registration status and deduction rate before the first payment is made, and keeping records HMRC will accept as evidence of due diligence.
- Nil returns filed automatically for quiet months: so a slow week on site doesn't turn into a missed HMRC deadline and a penalty.
- Ongoing monitoring of your subcontractor base: not just a one-off check, in line with what HMRC now expects from contractors.
- Accurate, on-time deductions and payments: whether subcontractors are on the standard 20%, the unregistered 30%, or hold Gross Payment Status.
- Local knowledge of the Kent and South East construction market: meaning support that understands how site-based, multi-subcontractor projects actually work day to day, not a generic national call centre.
Supporting Kent's Contractors and Subcontractors for Over 30 Years
At Riddingtons Payroll, we've supported contractors and subcontractors across the CIS sector for over three decades, working with businesses across Kent and the wider South East, from Maidstone, Ashford, Canterbury, and Tunbridge Wells, through to Medway, Dartford, and into Surrey, Sussex, and London.
With the 2026 CIS changes now in force, there's never been a better time to review how your CIS payroll and subcontractor verification is handled. Whether you need a full CIS payroll service, help preparing for nil return requirements, or a compliance check on your current subcontractor due diligence, our team is on hand to help.
Get in touch with Riddingtons Payroll to talk through your CIS requirements and how we can take the admin off your plate.
