CIS (Construction Industry Scheme) Accounting Services in the UK

Navigating the complexities of the Construction Industry Scheme (CIS) can be challenging for contractors and subcontractors alike. At Jermyn & Co, we offer expert CIS accounting services to ensure compliance with HMRC regulations and help you manage your tax obligations effectively.

Whether you need support with monthly submissions, verifying subcontractors, or claiming tax rebates, our experienced team is here to simplify CIS for you.

Why Jermyn & Co?

Why Choose Jermyn & Co for CIS Services?

At Jermyn & Co, we understand the unique requirements of the construction industry. Our CIS specialists ensure your business remains compliant while helping you streamline processes and maximise tax efficiency.

We provide:

  • CIS Registration & Compliance – Assistance with registering as a contractor or subcontractor and maintaining full compliance with HMRC rules.
  • Monthly CIS Returns – Accurate preparation and timely submission of CIS returns to avoid penalties.
  • Subcontractor Verification – Verifying subcontractors with HMRC to determine the correct deduction rates.
  • Tax Reclaim Support – Helping subcontractors reclaim overpaid CIS deductions swiftly and accurately.

Our tailored services are designed to save you time, reduce your administrative burden, and let you focus on growing your business.

CIS Registration

Monthly Returns & Deductions

Subcontractor Verification

CIS Tax Reclaims

Jermyn & Co

Software Integration and Compliance

We utilise leading accounting software, including Xero, QuickBooks, and Sage, to help you stay on top of your CIS obligations. Our cloud-based solutions:

  • Automate CIS calculations and deductions.
  • Generate accurate monthly reports for HMRC submissions.
  • Provide real-time tracking of payments and deductions.

By integrating modern software into your processes, we ensure efficiency, accuracy, and compliance with the Construction Industry Scheme’s requirements.

Jermyn & Co

What our clients say about their experience with us

Very good and reliable accountants , fast response and always there to help .Been using Karl Jermyn for more than 5 years and not planning to change soon .


Selena Andone via Google

Very personable attention from staff. I value the advice from, frank discussions with, Karl


Matt Langley via Google

Super efficient service, friendly staff and very professional. Highly recommended


Suzy Horth via Google

Great service – always friendly and willing to advise. Goes the extra mile for you which is lovely and much appreciated in this day and age.


Charles Grewcock via Google

I have been a customer of Karl for some years now and have always found him and his team approachable, professional and friendly. All my questions and accounting issues are answered and dealt with quickly and he is always happy to help in anyway. I couldn’t recommend them enough.


Sue Hull via Google

Definitely worth 5 stars. Would highly recommend.Extremely helpful with both my personal and business accounts.


Willewhar via Google

Carl and his team has been great doing our business accounts and self assessment. Always willing to answer any questions we may have and explain things if necessary. He always thinks about his clients needs and we are very happy for Jermyn & Co to be our accountants.


Linda Thorpe via Google

I have been a customer for a number of years and am a very small company in terms of turnover. The service and guidance I have received over the years from the staff especially Karl has been fantastic! I am always late getting my books in but they always turn them around in double quick […]


Nicky via Google

Brilliant and professional service from Karl and his team. Always ready to help with any questions and supported us through running our business and helping us to sell when we retired.


Alison Maskrey via Google

Karl and his team have done our accounts for quite a few years now.We have always been happy with them and any queries we have are answered promptly.Highly recommend.


Amanda McFarlane via Google

Jermyn & Co

Frequently Asked Questions about Business Tax

The CIS is a set of HMRC rules that require contractors to deduct tax from subcontractor payments and submit the deductions to HMRC. It applies to most construction work in the UK.

Contractors and subcontractors working in the construction industry are required to register. Contractors must also verify their subcontractors with HMRC.

Subcontractors often overpay CIS deductions. We can calculate your overpayments, prepare the necessary documentation, and submit claims to HMRC to ensure you receive your refund promptly.

HMRC imposes penalties for late or inaccurate CIS returns, starting at £100 for the first month and increasing thereafter. We ensure your returns are submitted accurately and on time to avoid these fines.

Our Accountancy Services

We offer a range of services to help you manage your finances and grow your business.

Why Jermyn & Co?

Why Choose Jermyn & Co for Your Accounts?

At Jermyn & Co, we’re more than just accountants – we’re your partners in success. Our accountancy services are designed to help you:

  • Stay Compliant – Ensure your financial records meet HMRC and Companies House requirements.
  • Save Time – Let us handle the numbers while you focus on growing your business.
  • Improve Efficiency – Streamline processes and reduce errors with expert support.
  • Plan for Growth – Use actionable insights to guide your financial decisions and achieve your goals.

With our proactive approach, you’ll gain the confidence and clarity you need to succeed.

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Why Jermyn & Co?

Why Choose Jermyn & Co for Business Tax?

Tax legislation in the UK can be complex and ever-changing, but with Jermyn & Co by your side, you’ll have access to expert advice and practical solutions.

Our services include:

With our expertise, you can focus on running your business while we handle the numbers. We’re committed to helping you stay ahead of deadlines and legislation changes.

Corporation Tax Compliance

VAT Services

R&D Tax Credits

Tax Planning and Advisory

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Why Jermyn & Co?

Why Choose Jermyn & Co for Personal Tax?

At Jermyn & Co, we understand that everyone’s financial situation is unique. Our personal tax services are designed to help you:

  • Optimise Tax Efficiency – Leverage allowances, reliefs, and deductions to minimise your tax liability.
  • Ensure Compliance – Stay on top of filing deadlines and HMRC requirements to avoid penalties.
  • Plan for the Future – Align your tax strategy with your long-term financial goals.
  • Simplify Tax Complexity – Let us handle the details so you can focus on what matters most.

From simple tax returns to complex financial arrangements, we provide expert advice and support tailored to your needs.

Proactive Tax Planning

Expert Guidance

Tailored Solutions

Stress-Free Compliance

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Why Jermyn & Co?

Why Choose Jermyn & Co for Corporate Finance?

At Jermyn & Co, we understand that every business is unique. Our experienced team offers a personalised approach to corporate finance, helping you:

  • Secure Financing – Access the funding you need for expansion, acquisitions, or working capital.
  • Plan for Growth – Develop tailored financial strategies to achieve your business objectives.
  • Manage Mergers & Acquisitions – Navigate complex transactions with confidence, from valuations to negotiations.
  • Optimise Financial Performance – Streamline processes, reduce costs, and maximise profitability.

Whether you’re a start-up seeking investment or an established business exploring new opportunities, we’ll provide the expert guidance you need to succeed.

Business Valuations

Mergers & Acquisitions (M&A)

Fundraising & Investment

Financial Modelling
& Forecasting

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Why Jermyn & Co?

Why Choose Jermyn & Co for HR Services?

At Jermyn & Co, we understand that every business is unique, and so are its HR needs. Our tailored HR services help you:

  • Stay Compliant – Meet the latest UK employment laws and regulations with ease.
  • Save Time and Resources – Let us handle the admin while you focus on growing your business.
  • Engage Your Team – Build a positive, productive workplace with our employee engagement solutions.
  • Grow with Confidence – Ensure your HR strategy aligns with your long-term business objectives.

Whether you need ongoing HR support or help with a specific issue, our experienced team is here to assist.

Payroll Management

HR Compliance

Employee Engagement & Retention

Training & Development

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Jermyn & Co

How We Help Contractors and Subcontractors Succeed

At Jermyn & Co, we provide end-to-end CIS solutions that simplify the complex requirements of the Construction Industry Scheme. Whether you’re a contractor ensuring compliance or a subcontractor reclaiming overpaid tax, we’ll guide you every step of the way.

Our proactive approach and industry expertise help you reduce administrative workload, avoid penalties, and improve your financial efficiency. With Jermyn & Co, you’ll have the confidence to focus on growing your business.

Ready to Simplify CIS Compliance?

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Review and Plan

We’ll deliver tailored CIS solutions for your business.

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Stay compliant while saving time and effort.