Free CIS Tax Rebate Calculator & Refund Estimator

Nikunja Shah
Written & Reviewed by
MBA in Finance & HR, PGDBM, Xero Advisor Certified and ACCA Part-Qualified Accountant
Updated on
01 June 2026
Reading time
12 mins

Use our CIS rebate calculator to instantly estimate your CIS tax refund, or download the free Excel version to calculate it offline. Find out how much tax you may have overpaid and how much HMRC could potentially owe you.

CIS Tax Refund Calculator

£
£
CIS tax is not deducted from materials.
£
£
Tax Code: 1257L Tax Year: 2026/27
Your Estimated Refund

£0.00

Gross Profit £0.00
Taxable Income £0.00
Total Tax Due £0.00

Calculation Breakdown

Income Tax Calculated after your Personal Allowance
£0.00
Class 4 NIC Self-employed National Insurance
£0.00
CIS Tax Paid Money deducted by contractor
No spam. We do not store this address.
Download CIS Tax Rebate Calculator (Excel Version) Download and calculate your CIS tax refund offline for free. No email or sign-up required — direct download
Free Download

We can help you claim your refund

Get a refund of your Construction Industry Scheme (CIS) deductions if you’ve overpaid tax or National Insurance. Complete the form below and one of our CIS tax experts will be in touch to guide you through the process.

Calculations Reviewed by ✔ Verified
Xero Advisor Certified | ACCA Part-Qualified Accountant

Calculations on this page have been reviewed and verified to ensure accuracy and alignment with current UK tax regulations for the 2025/26 and 2026/27 tax years.

Last reviewed: 01 June 2026
Claim Your Refund
All content © 2013–2026 IT Contractors UK. All rights reserved. Unauthorised use, reproduction, or distribution of any material is strictly prohibited.