Specialist CIS Accountants

London and Surrey

Martax Accountants is an independent firm of Chartered Certified Accountants who specialise in providing CIS accounting and tax services to sole traders and limited companies working in the Construction Industry Scheme. Whether you are working as a CIS contractor or a subcontractor, our specialist team of CIS accountants can help you meet all the filings requirements and to ensure that you maximise your tax savings.

We are specialist CIS accountants based in New Malden serving clients in London and Surrey. We provide CIS accountancy and tax return services for a fixed fee and there are no hidden charges.
If you are working in the construction industry whether as self employed or through a limited company, you will have certain responsibilities towards HM Revenue and Customs (HMRC) and that is where Martax Accountants can help you to fulfill all your obligations. We provide our CIS tax returns and accounting services in New Malden, Kingston Upon Thames, Wimbledon, Cobham, Weybridge and all the surrounding boroughs in London and Surrey.

Why choose Martax Accountants?

  • Chartered Certified Accountants
  • Online accounting software
  • Fixed pricing
  • No hidden charges
  • On-going support
  • Dedicated accountant
  • HMRC registered agent
  • Free consultation
  • CIS Speclialists

Accountants for CIS Limited Companies

Under the Construction Industry Scheme, if you are a contractor you will need to deduct CIS tax from your subcontractors and submit CIS returns to HMRC. CIS contractors must be registered with HMRC for the scheme. CIS subcontractors don’t have to register, but there will be higher deduction of tax if they are not registered.

If you are a contractor within the construction industry then you will have to submit monthly CIS returns before the 19th of each month. A CIS return lets HMRC know that how much CIS tax you have deducted from your subcontractors and therefore how much you owe to them. We are specialist CIS contractor accountants who can help you prepare and submit your monthly CIS returns ensuring that you are compliant with HMRC and provide your CIS subcontractors their CIS vouchers and deduction statements throughout the year.

If you would like to work in the construction industry through a limited company, the first step would be to register a limited company with Companies House. As a director of the company you will have certain responsibilities which you will be required to fulfill throughout the year. As compared to CIS sole traders, CIS limited companies have more filing requirements such as:

  • Submission of annual company accounts with HMRC and Companies House
  • Submission of annual corporation tax return with HMRC and the payment of corporation tax liability (if any)
  • Monthly CIS returns with HMRC if you hire CIS subcontractors
  • Monthly RTI returns with HMRC if you employ someone in your company
  • Monthly or quarterly VAT returns if you are registered for VAT
  • Submission of annual confirmation statements with HMRC

At Martax we have a team of specialist CIS limited company accountants who can help you with the following:

  • Remind you when it’s time to file a return and request the relevant information every month
  • Adding and verifying new subcontractors
  • Process payslips and deduction statements for subcontractors
  • Submit your monthly CIS returns
  • Provide ongoing advice and support on CIS issues
  • Automated email reminders to inform you when your CIS returns are due
  • Representation in the event of a CIS enquiry from HMRC
  • Correspondence with HMRC on your behalf
  • Unlimited help and advice regarding your CIS Returns
  • Monthly payslips and RTI submission with HMRC in relation to your employees
  • Quarterly VAT returns
  • Preparation and submission of annual accounts


Our Complete CIS Small Business Accounting Solution

Online Accounting Package of your choice

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CIS Contractors Martax Accountants

Receipt Bank
Scanning Tool

CIS Contractors Martax Accountants

Why Online Accounting Software?

  • Access your business financials anytime, anywhere from an internet connected device – phone, tablet or computer
  • Easy collaboration with Martax Accountant for any help or support
  • Create, send invoices and add your expenses
  • Automatic bank feed and connectivity with other softwares

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Why Receipt Bank?

  • Paperless solution for accounting and bookkeeping
  • Quick and accurate data extracts by scanning expenses receipts
  • Integration with online accounting Software Xero, Kasfhlow and Quickbook
  • Safe and secure storage of data for at least 7 years

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