Work with specialist Construction Industry Scheme (CIS) Accountant in London
At CoreAdviz Accountants in London, we provide specialist CIS advice and compliance support for UK Construction Industry Scheme (CIS). As an experienced CIS accountant, we help subcontractors, contractors, self-employed tradespeople, and construction businesses to manage CIS deductions accurately, claim tax refunds, maintain compliance with HMRC, and file monthly CIS returns on time.
🏗️ What Is the Construction Industry Scheme (CIS)?
The Construction Industry Scheme is a tax deduction framework that applies to payments made by contractors to subcontractors for construction work in the UK. Under CIS, contractors must deduct tax at source from payments made to subcontractors and pass it to HMRC monthly. This scheme covers most construction-related activities including building, decorating, plumbing, electrical work, demolition, and site preparation.
💡 Annotation: CIS applies whether you're employed through a limited company, partnership, or working as a sole trader subcontractor.
Who needs CIS accounting services?
CIS is applicable to construction subcontractors, contractors, sole traders in trades, limited companies in construction, and labour-only contractors. You can refer our dedicated page to know more details of who we help.
- Accountant for Self-Employed Tradespeople
- Accounting for IT Contractors
- Accounting Service for Small Business
📋 How we help in CIS compliance and accounting?
Our top rated CIS accountant near London provides free 15 minutes CIS advice online in UK. We help in compliance, monthly returns, and tax planning. We shall be guiding through:
CIS Registration & Verification
- CIS subcontractor registration with HMRC
- Gross payment status applications
- Monthly verification checks for contractors
- UTR and CIS number setup
Monthly CIS Returns & Compliance
- Monthly CIS300 return submissions to HMRC
- Accurate deduction calculations (20% or 30%)
- Payment and filing deadline management
- CIS statements and record-keeping
CIS Tax Refunds & Reconciliation
- Year-end CIS tax refund claims
- Self Assessment integration with CIS deductions
- P35 and year-end reconciliation
- Overpayment recovery from HMRC
CIS Tax Planning & Advisory
- Gross payment status eligibility assessment
- Limited company vs sole trader structure advice
- Expense claims and allowable deductions
- VAT registration for construction businesses
💡 Annotation: Proper record-keeping of CIS statements is essential for claiming tax refunds and avoiding HMRC penalties.
What are pricing for CIS accounting services?
For top rated CIS accountant's advice you can book an appointment online with free 15 minutes call or a paid consultation of 30 / 60 minutes. For compliance and accounting, most of the time we work on fixed monthly or annual fee basis. You can refer more detail at our pricing page and request an instant quote.
📈 Why Choose CoreAdviz as Your CIS Accountant?
Choosing the right accountant for CIS is about more than just filing monthly returns — it's about managing deductions correctly, maximising tax refunds, and staying compliant with HMRC. At CoreAdviz Accountants, we act as a trusted advisor, helping construction subcontractors and contractors understand their CIS obligations clearly and make informed decisions throughout the tax year. From CIS registration and monthly returns to year-end reconciliation and tax refund claims, our advice is practical, compliant, and tailored to the construction industry. We work with clients across the UK and London through flexible online appointments, providing expert support without jargon, delays, or unnecessary costs. Most importantly, we focus on helping you claim every deduction you're entitled to while giving you confidence that everything is handled correctly with HMRC.
- Accurate monthly CIS return filing
- Proactive tax planning to maximise refunds
- Expert handling of gross payment applications and compliance
📊 CIS Deduction Rates & Key Dates (UK)
| Item | 2025/26 Rule | Notes |
|---|---|---|
| Standard CIS Deduction Rate | 20% | Registered subcontractors |
| Higher CIS Deduction Rate | 30% | Unregistered subcontractors |
| Gross Payment Status | 0% | For qualifying businesses |
| Monthly Return Deadline | 19th of month | Following payment month |
| Payment Deadline | 22nd of month | Electronic payment to HMRC |
| Self Assessment Integration | 31 January | Annual tax return deadline |
🔗 Useful CIS Resources
❓ Frequently Asked Questions (FAQ)
1. What is CIS and who does it apply to?
CIS (Construction Industry Scheme) is a tax deduction scheme for the construction industry. Contractors must deduct tax from payments to subcontractors and pay it to HMRC. It applies to most construction work including building, decorating, demolition, and repairs.
2. Do I need to register for CIS?
If you're a subcontractor working in construction, you should register for CIS to have tax deducted at 20% instead of 30%. Contractors must register if they spend more than £3 million annually on construction work or meet certain conditions.
3. What is gross payment status and how can I get it?
Gross payment status allows qualifying subcontractors to be paid without CIS deductions. To qualify, your business must pass compliance, turnover, and business test requirements. A specialist CIS accountant can help you apply and maintain this status.
4. How much tax is deducted under CIS?
Registered subcontractors have 20% deducted, unregistered have 30% deducted, and those with gross payment status have 0% deducted. Materials are not subject to CIS deductions.
5. Can I claim back CIS deductions?
Yes — CIS deductions are offset against your annual tax bill through Self Assessment. If you've paid more CIS than you owe in tax, you can claim a refund from HMRC.
6. What happens if I don't file CIS returns on time?
HMRC may charge automatic penalties starting at £100 per month for late returns, plus interest on late payments. Persistent non-compliance can lead to higher penalties and investigations.
7. Do I need an accountant for CIS?
You are not legally required to use an accountant for CIS, but it is highly advisable—especially if you're managing multiple contractors, applying for gross payment status, or claiming tax refunds. CIS rules are detailed, and mistakes in monthly returns, deduction calculations, or record-keeping can lead to penalties or lost refunds. An experienced CIS accountant can handle monthly compliance, maximise your tax position, and ensure everything is reported correctly to HMRC, giving you peace of mind to focus on your construction work.
💡 Annotation: Many subcontractors overpay tax because they don't properly track CIS deductions or claim allowable expenses.
8. What expenses can I claim as a CIS subcontractor?
Allowable expenses include tools and equipment, vehicle expenses, protective clothing, insurance, accommodation (if away from home), and professional fees. Keeping accurate records is essential for maximising tax relief.
