Address :- 152-178 Kingston Rd, New Malden KT3 3ST, UK

Timing :- Mon - Fri : 09:00 - 17:00

Phone :- 020 8191 9583

Timing :- Mon - Fri : 09:00 - 17:00

Phone :- 020 8191 9583


Self Employed CIS Tax Return

Zahtax Accountants provides self employed CIS tax return services to clients. We are based in New Malden, Surrey, but help CIS subcontractors cover all the surrounding areas, such as Surbiton, Chessington, Wimbledon, Kingston, Weybridge and others. We have a team of CIS expert accountants who can professionally provide CIS tax return services, ensuring that you claim all your legitimate expenses and receive your CIS tax refund as soon as possible. To ensure reliable, trustworthy and transparent services, we never request our clients refunds into our bank account. Our clients receive their refunds directly into their personal bank account. Additionally, we do not charge our clients a percentage of their refund. Our fees are based on the work involved in preparing and submitting your CIS refund tax return.  

Who is CIS subcontractors?

A self employed CIS subcontractor is a worker who does some kind of construction work. HMRC tax rules governing the construction workers are called Construction Industry Scheme (CIS) rules. Most of the construction related work will fall under the Construction Industry Scheme. For example, laying foundations, brickwork, repairs and maintenance, decorating, heating, gas, electric work etc.  

If you work as a CIS subcontractor, your employer (CIS contractor) will deduct 20% tax from your invoice/earnings. It is the responsibility of the CIS contractor to deduct 20% tax from the CIS subcontractor and make this payment to HMRC. The CIS tax deductions are effectively an advance payment of the CIS subcontractor’s tax and national insurance.  

Responsibilities of CIS subcontractors

Under the construction industry scheme (CIS), you have certain responsibilities: 

  • Registration with HMRC

If you are working as a CIS subcontractor and providing your services personally (you have not registered your own limited company), you should be registered with HMRC as a self-employed CIS subcontractor. You can call HMRC helpline on 0300 200 3210 to register as a CIS worker.  

  • Send invoices to your CIS contractors for your work 

You should send invoices for the work completed to your CIS contractor, who will make the payment to you after the deduction of CIS tax. If you are a registered CIS worker, your contractor will deduct 20% tax. However, your contract will deduct 30% tax from your invoice if you are not a registered CIS worker.  

  • Keep a record of CIS deduction statements 

As a self-employed CIS contractor, you must ensure that you keep a record of CIS deductions made by your employer/CIS contractor. You must request your employer/CIS contractors for the CIS deduction statements. They will issue this every month for any CIS deduction made from your pay. This will serve as an evidence for HMRC that you have paid your CIS tax at source.  

  • Keep a record of all your expenses related to your self employed CIS work

Ensure that you keep all the expenses receipts related to your work to claim these expenses against your employment work. For example, if you buy any tools which you will be using for your self employment work, you can claim this against your self employment income. In the same way, any other self employment related expenses, such as travel, fuel, insurance, etc, can be claimed against your self employment income.  

  • File your annual self employed CIS Tax Return

Being a CIS self employed woker, you are required to file your self assessment tax return every year. In your tax return, you need to include the following: 

  • Total gross income for the year 
  • CIS deductions made by your employer/CIS contractor 
  • A breakdown of the expenses incurred related to your self employed CIS work 
CIS Tax Refund

As discussed above, your CIS contractor will deduct CIS tax from your wage and will make the payment of your CIS tax deducted to HMRC. In your annual CIS tax return, you will provide the details of your income and CIS tax deducted. If the tax deducted by the contractor is more than your actual tax liability, you will get your CIS tax refund also called CIS tax rebate from HMRC. If the tax deducted is less than your actual tax liability, you will make additional payment of tax. At Zahtax, we have an expert team of CIS accountants who can help you prepare your tax return, ensuring that you claim all your legitimate expenses and maximise your refund.

CIS Subcontractor Allowable expenses

An expense is allowable to offset against your CIS income if it has been incurred wholly and exclusively for the purpose of your Self employed CIS work. Based on our experience, the most commonly incurred expenses by CIS subcontractors are: 

  • Material bought for CIS work  
  • Equipment and Tools bought to be used in CIS work  
  • Travel costs 
  • Vehicles such as Van running costs e.g. fuel, insurance, repairs and maintenance etc 
  • Protective clothing such helmet, goglles, high visibility jackets etc 
  • Telephone/mobile 
  • Printing, stationery, postage 
  • Use of home  
  • Other administration costs 
CIS Subcontractor Tax Return Deadline

The deadline to file the annual Self employed CIS tax return is 31 January for the following the end of the tax year. The accounts for self employed CIS subcontractors are usually prepared for the period 1 April to 31 March. For example, annual CIS tax return for the period 1 April 2022 to 31 March 2023 would be filed by 31 January 2024. The deadline to file the CIS tax return and to make the payment is the same as 31 January 2024. 

Frequently Asked Questions (FAQs)
How do I get my tax rebate?

If we are preparing your self employed CIS tax return, you will get your refund directly into your bank account. We will prepare your CIS tax return, and if there is a refund on your tax return, we will include your bank account details for the refund. HMRC will pay any refund directly into your bank account. 

How do I Increase my rebate?

Your tax rebate is based on your gross income, CIS tax deducted by the contractor and expenses incurred by you related to your self employed CIS work. We will advise you to claim all the legitimate expenses related to your self-employment work to maximise your refund.  

I have paid CIS tax on my income. When can I claim my CIS tax refund?

If you have paid CIS tax on your self-employment work and expect a refund in your tax return, you can prepare your tax return and submit it soon after 5 April. If you would like Zahtax Accountants to prepare your tax return, we can prepare it as soon as you provide us with your information in April and submit it to HMRC to ensure that you get your refund as quickly as possible.  

How long can a CIS tax refund take?

It can take up to six weeks for HMRC to process a CIS refund. Sometimes, it can take longer if HMRC is not able to verify your refunds with the employer you worked for. Zahtax Accountants will keep you updated if there is any delay in your refund, and we will try our best to ensure that you get your refund as soon as possible.


Why choose Zahtax for your self employed CIS Tax Return
How Zahtax Accountants can help
  • Chartered Certified Accountants regulated by the Association of Chartered Certified Accountants  
  • Registered with Information Commissioner’s Office (ICO) 
  • General Data Protection Regulation (GDPR) compliant process and software 
  • HMRC Authorised agent 
  • Fixed fee quote 
  • Specialist Self employed CIS Tax Return team 
  • Personalised CIS Tax Return service  
  • A complete digital solution to prepare and submit your tax return 
  • Registration with HMRC as a self employed CIS worker 
  • Preparation of your annual Self employed CIS accounts 
  • Preparation of you annual Self employed CIS Tax Return  
  • Calculation of your CIS Tax liability or CIS tax refund  
  • Submission of your CIS Tax Return with HMRC using HMRC Approved software 
  • Advise on how to make the payment of your tax liability if any 
  • Advise on how much refund you will receive into your bank account if any 
  • Reminders for all the important deadlines related to your Self employed CIS tax return 


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