How to claim your CIS tax rebate? You can claim a refund of overpaid income tax by submitting your annual self assessment tax return to HMRC.

You can submit your self assessment tax return online by registering with HMRC for self assessment and creating a government gateway account.

Alternatively, you can engage Canalitix Accountants to act as your agent for submitting your self assessment tax return to HMRC.

Work out your CIS tax rebate

1. Obtain your annual CIS tax statement from each contractor you worked for during the tax year.

Where the contractor has gone out of business you should obtain details of the CIS deductions by writing to HMRC and Include the following information:

  • your name, address and Unique Taxpayer Reference (UTR)
  • the name and address of the contractor
  • the contractor’s tax reference - if you know it
  • the dates of the payments or the tax months when the contractor paid you
  • the reason why you do not have the statements or duplicates
The address to write to is:
NIC and EO
HM Revenue and Customs
BX9 1BX

2. Work out your gross income from your CIS statements

Using the CIS statements collected in 1 above, calculate your gross income for the tax year starting on 6th April and ending on 5th April.

3. Organise your receipts into the categories on the self assessment tax return.

  • Cost of goods bought for resale or goods used
  • Construction industry - payments to subcontractors
  • Wages, salaries and other staff costs
  • Car, van and travel expenses
  • Rent, rates, power and insurance costs
  • Repairs and maintenance of property and equipment
  • Phone, fax, stationery and other office costs
  • Advertising and business entertainment costs
  • Interest on bank and other loans
  • Bank, credit card and other financial charges
  • Irrecoverable debts written off
  • Accountancy, legal and other professional fees
  • Depreciation and loss/profit on sale of assets
  • Other business expense

4. Add up your expenses in 3 above to determine your total expenses for the year.

5. Calculate your trading profit for the year as your gross income less total expenses.

6. Determine your taxable profit by subtracting your tax-free annual allowance from your trading profit.

7. The final CIS tax rebate is calculated after deducting:

  • Class 2 NI
  • Class 4 NI, and
  • Income tax

from the tax paid at source by the CIS subcontractor . The annual CIS statement received from the contractor includes the figure for total CIS suffered by the subcontractor.

You can use our CIS Tax Rebate calculator to estimate your potential repayment of income tax.

CIS Tax Rebate Calculator

8. Providing you are satisfied with your estimated tax rebate calculations, you can either update and submit your Self Assessment tax return online using your government gateway account or engage an accountant to do it on your behalf.

Canalitix Accountants are authorised by HMRC to act as Self Assessment tax agents and would welcome the opportunity to assist with your tax return.