What is a CIS Accountant?

If you work in construction, understanding the Construction Industry Scheme (CIS) is essential. Whether you’re a contractor or subcontractor, CIS affects how tax is deducted, reported, and paid to HMRC.

Working with a specialist CIS Accountant ensures you remain compliant, maximise your tax efficiency, and avoid costly penalties.

At Norton Bridges & Co. Limited, we are Stanmore-based CIS accountants with over 17 years of experience supporting construction businesses across London and the UK.

What is CIS?

The Construction Industry Scheme (CIS) is a UK government tax scheme introduced by HMRC. It applies to contractors and subcontractors working within the construction industry.

Under CIS:

Contractors deduct money from subcontractors’ payments.
These deductions are paid directly to HMRC.
The deductions count as advance payments towards the subcontractor’s tax and National Insurance.

CIS was created to reduce tax evasion within construction and ensure tax is collected at source. However, the rules are detailed and often misunderstood, which is why many businesses rely on a qualified <strong>CIS Accountant</strong> to manage compliance correctly.

What is a CIS Contractor?

A CIS contractor is a business or individual that pays subcontractors for construction work.

Contractors are responsible for:

Registering for CIS with HMRC
Verifying subcontractors before payment
Deducting the correct tax rate (0%, 20%, or 30%)
Filing monthly CIS returns
Keeping accurate payment and deduction records

Failure to submit accurate monthly returns or make correct deductions can result in automatic penalties from HMRC.

A specialist CIS Accountant ensures contractors meet all obligations while maintaining accurate financial systems and reporting.

What is a CIS Subcontractor?

A CIS subcontractor is a person or business that carries out construction work for a contractor.

Subcontractors may:

Have tax deducted at 20% (standard rate)
Be subject to 30% deductions if not registered
Apply for Gross Payment Status (0% deduction) if eligible

Subcontractors often overpay tax throughout the year due to CIS deductions. An experienced CIS Accountant can:

Prepare accurate tax returns
Identify allowable expenses
Recover CIS tax refunds
Ensure correct registration status

Many subcontractors are entitled to significant tax refunds, but without expert guidance, they may miss out.

What Work is Covered by CIS?

CIS applies to most construction-related work, including:

Building and civil engineering work
Site preparation
Alterations, repairs, and extensions
Decorating and finishing
Demolition and dismantling
Installation of systems (heating, lighting, ventilation, etc.)

However, some activities are excluded, such as:

Architecture and surveying
Scaffolding hire without labour
Carpet fitting
Deliveries of materials without installation

Because classification errors can trigger penalties, working with a knowledgeable CIS Accountant ensures your work is correctly categorised and reported to HMRC.

Why Choose Norton Bridges as Your CIS Accountant?

Choosing the right accountant is critical when operating under CIS regulations.

Specialist CIS Expertise

At Norton Bridges & Co. Limited, CIS accounting is not an add-on service — it’s a core specialism. We understand the complexities contractors and subcontractors face daily.

17+ Years of Experience

We have supported thousands of construction clients in Stanmore, London, and across the UK. Our experience means we understand both the regulations and the practical realities of running a construction business.

Proven Track Record of Tax Refunds

We have successfully helped thousands of clients recover CIS tax refunds from HMRC.

Clear, Straightforward Advice

CIS regulations can be technical. We explain everything clearly so you understand your responsibilities and opportunities.

What Are Our CIS Accounting Services?

As specialist CIS Accountants, we provide a comprehensive range of services tailored to contractors and subcontractors.

For Contractors

CIS registration and setup
Subcontractor verification
Monthly CIS returns
Payroll services
Bookkeeping and reporting
Year-end accounts
Corporation tax returns

For Subcontractors

Self-assessment tax returns
CIS refund claims
Expense reviews and tax optimisation
Gross Payment Status applications
Bookkeeping support
Ongoing tax advice

Ongoing Support

We also provide:

Cash flow management advice
Business growth support
Strategic tax planning
Compliance reviews

Do You Need a CIS Accountant?

If you:

Are unsure about your CIS responsibilities
Have received HMRC penalties
Believe you are owed a CIS refund
Want to apply for Gross Payment Status
Need help managing monthly CIS returns

Then working with a specialist CIS Accountant can save you time, stress, and money.

Speak to a CIS Accountant in Stanmore Today

Norton Bridges & Co. Limited are trusted CIS Accountants based in Stanmore, London. We provide expert support to construction professionals who want clarity, compliance, and confidence in their finances.