2026/27 HMRC RatesFree
CIS Tax Rebate Calculator UK
Calculate your potential CIS tax rebate. If you work in construction and have had CIS deductions taken from your pay, you may be owed a tax refund.
CIS Tax Rebate Calculator
Enter your CIS income and expenses
Total pay before CIS deductions
From your CIS statements
Allowable Expenses
CIS Rebate Results
Estimated Rebate
£2,986
You may be owed a refund!
Additional Tax Due
£0
| Gross CIS Income | £45,000 |
| Less: Allowable Expenses | -£10,000 |
| Taxable Profit | £35,000 |
| Personal Allowance | £12,570 |
| Taxable Income | £22,430 |
| Income Tax Due | £4,486 |
| Class 2 NI | £182 |
| Class 4 NI | £1,346 |
| Total Tax Liability | £6,014 |
| CIS Already Deducted | £9,000 |
| Rebate Due | £2,986 |
CIS Deduction Rates
Standard Rate
20% deducted if registered with HMRC
Higher Rate
30% deducted if not registered
Gross Payment Status
0% deduction (must apply to HMRC)
Common CIS Expenses
- • Tools and equipment
- • Work clothing and PPE
- • Travel to different sites
- • Materials you supply
- • Phone and admin costs
- • Professional subscriptions
- • Insurance costs
CIS Tax Rebate FAQ
What is CIS?
The Construction Industry Scheme (CIS) requires contractors to deduct tax from subcontractor payments and pass it to HMRC. This counts towards your annual tax bill.
How do I claim a CIS rebate?
You must file a Self Assessment tax return. If your CIS deductions exceed your tax liability, HMRC will refund the difference. Keep all CIS statements as evidence.