Running a contractor limited company should not mean chasing Companies House compliance deadlines, sorting VAT records late at night, and wondering whether payroll, corporation tax and your own self assessment all line up. CBM Accounting Ltd is a London-based chartered accountancy and tax consultancy firm that supports UK contractors and limited companies with accounting, tax, VAT, payroll and compliance.
If you invoice clients through a limited company, use subcontractors under CIS, or need outsourced back-office support as your contractor business grows, CBM Accounting gives you joined-up support rather than isolated filings. We help you keep records current, meet HMRC requirements and make better decisions using cloud accounting and practical, confidential advice.
Contractor accountant for limited companies in London and across the UK
CBM Accounting works with owner led businesses and established companies, and for contractors the priority is usually simple: keep the company compliant without letting admin take over. Our contractor accounting support covers limited company bookkeeping, annual accounts and financial reporting, corporation tax, VAT, payroll, director tax returns and HMRC and Companies House compliance, so you are not trying to coordinate separate providers for every deadline.
“CBM Accounting was established in 2010, brings 20+ years of experience, and has supported 1,000+ clients.”
From our London office at 3rd Floor, 86–90 Paul Street, London EC2A 4NE, CBM Accounting serves contractors across the UK. That means you can get structured support whether you are a single-director consultant, a construction contractor, or a growing limited company with staff and subcontractors.
CBM Accounting handles contractor bookkeeping, tax, VAT and payroll as one service
Contractors rarely need more finance jargon. You need the right returns, at the right time, backed by records that make sense if HMRC ever asks questions. CBM Accounting brings day-to-day bookkeeping and end-of-year filings together so your figures flow more cleanly from invoices and expenses into VAT, payroll, annual accounts and tax returns.
Your support can include:
- Bookkeeping and cloud accounting
- Annual accounts and financial reporting
- Corporation tax and business tax support
- VAT registration, filing and advisory
- Payroll services
- Director self assessment tax returns
- HMRC and Companies House compliance
- Tax investigation support
- Outsourced accounting and back-office support
CBM Accounting can also provide broader outsourced finance support if your contractor company has grown beyond basic bookkeeping. That gives you continuity between operational records and statutory filings, which is especially useful when you need reporting for decisions as well as compliance.
Private limited companies can face penalties for filing annual accounts late. We keep the compliance workload visible, so annual accounts, tax deadlines and routine filings do not become separate problems that only surface at the last minute.
CIS contractor accounting and monthly returns for limited companies paying subcontractors
If your limited company operates under the Construction Industry Scheme, the compliance burden is heavier. HMRC requires contractors to report payments to subcontractors each month through a monthly return, and if no payments were made you still need to file a nil return or submit an inactivity request. CBM Accounting helps contractors manage CIS accounting, payroll and HMRC compliance so these monthly obligations do not get left behind.
“CBM Accounting supports monthly CIS returns, where HMRC says wrong employment status reporting can lead to penalties of up to £3,000.”
Employment status errors are not minor admin issues. HMRC says giving the wrong employment status for a subcontractor on the monthly return can lead to penalties of up to £3,000, so CBM Accounting focuses on accurate records and consistent reporting across payroll, subcontractor payments and CIS submissions.
This joined-up approach matters. When bookkeeping, payroll and monthly CIS reporting are aligned, you get clearer figures, less duplicate work and fewer rushed corrections before submission dates.
Cloud accounting and Making Tax Digital support for contractor businesses
UK contractor accounting is becoming more digital. HMRC says Making Tax Digital for Income Tax starts from 6 April 2026 for people whose 2024 to 2025 tax return showed qualifying income over £50,000, then extends to qualifying income over £30,000 from 6 April 2027 and over £20,000 from 6 April 2028. CBM Accounting uses cloud accounting and digital tools to keep your contractor records organised and ready for compatible software requirements.
“CBM Accounting uses cloud accounting to prepare contractors for Making Tax Digital, which starts from 6 April 2026 for qualifying income over £50,000.”
For many contractors, that means better visibility as well as compliance. We help you structure record keeping around the returns you actually need, so VAT, self assessment and company reporting are easier to prepare, review and submit.
Why CBM Accounting is a strong fit for contractors who want compliance and advice
Some accountants only appear at filing time. CBM Accounting combines routine compliance work with proactive advice, so you can raise questions about tax, payroll, VAT or reporting before a deadline becomes a problem.
That is valuable when your income is changing, you are taking on staff, or you need a clearer view of how the business is performing. CBM Accounting turns accounting data into practical conversations, not just year-end paperwork.
CBM Accounting also brings UK and UAE expertise, which can help if your contractor work, ownership structure or tax affairs touch more than one jurisdiction. Even when your company is entirely UK-based, our strong HMRC and compliance focus keeps the service tied to the rules that affect your business now.
When CBM Accounting is the right contractor accountant for your limited company
CBM Accounting is usually a good fit when you want more than a once-a-year filing service.
- You want one firm to handle the core workload: accounts, tax, VAT, payroll and director returns.
- You need CIS support: especially if your company pays subcontractors and monthly returns must be kept accurate.
- You want London-based, Support across the UK: with digital tools that make records easier to manage.
- You want practical advice as rules change: including HMRC compliance, Companies House deadlines and Making Tax Digital preparation.
If you only want the cheapest basic filing with no ongoing communication, we may not be the best match. CBM Accounting is better suited to contractors who want compliance handled properly and want access to advice as the business changes.
Trusted contractor accounting from a London firm with recognised affiliations
CBM Accounting was established in 2010 and states that it brings over 20 years of experience across accounting, tax, payroll and compliance. The firm has supported 1,000+ clients and provides UK nationwide service from its London base.
CBM Accounting’s professional affiliations with ACCA, CIMA, IFA and ICPA reinforce the firm’s focus on recognised standards. Our consultation style is confidential and practical, so the advice you receive is designed to be used in the real running of your contractor company.
Talk to CBM Accounting about your contractor limited company
If you want a contractor accountant who can keep your limited company compliant, handle CIS and payroll where needed, and help you stay ready for digital tax changes, speak to CBM Accounting. We can discuss your current setup, the filings you need, and the level of ongoing support that will make running your company simpler.
Contact CBM Accounting to arrange a consultation and get your contractor accounts, tax and compliance working as one system.