CIS refunds this April explained. Learn what expenses you can claim, what evidence HMRC requires, and when you can expect your refund.
The start of the new tax year on 6 April marks an important moment for workers under the Construction Industry Scheme (CIS). Many subcontractors will be expecting a tax refund, but uncertainty around expenses, evidence, and timing can cause unnecessary stress.
If you are unsure how your CIS refund works or what steps to take next, this guide will help you understand the process clearly and take the right action.
Why CIS refunds happen
Under the Construction Industry Scheme, contractors usually deduct tax at source from your payments. This is often at a higher rate than your final tax liability.
When you submit your Self Assessment tax return, HMRC calculates your actual tax position. If too much tax has been deducted during the year, you may be entitled to a refund.
This is why many CIS subcontractors receive refunds after the tax year ends.
What expenses you can claim
Claiming the right allowable expenses is key to maximising your CIS refund.
Common expenses include:
• Tools and equipment used for work
• Protective clothing such as safety boots and helmets
• Travel costs to temporary work sites
• Fuel and vehicle expenses for business use
• Professional fees and insurance
These expenses reduce your taxable income, which can increase the amount of your refund.
Why evidence matters for HMRC
HMRC requires clear evidence to support any expense claims.
You should keep:
• Receipts and invoices
• Bank statements showing payments
• Mileage records for travel
• CIS deduction statements from contractors
Without proper records, HMRC may reject claims or delay your refund.
Keeping organised records throughout the year makes the process much smoother.
When you can claim your CIS refund
You can submit your Self Assessment tax return after the tax year ends on 5 April.
Once your return is filed and processed, HMRC will calculate whether you are due a refund.
Refund timing can vary depending on:
• How early you submit your return
• Whether HMRC requires additional checks
• Accuracy and completeness of your records
Submitting early and ensuring everything is correct can help speed up the process.
Common mistakes that delay CIS refunds
Many subcontractors face delays due to simple errors.
These include:
• Missing or incorrect CIS deduction details
• Incomplete expense records
• Errors in income reporting
• Late submission of Self Assessment
Avoiding these mistakes can help ensure your refund is processed without unnecessary delays.
How to prepare at the start of the tax year
The new tax year is the perfect time to improve how you manage your records.
You can start by:
• Keeping digital or organised expense records
• Saving all CIS statements from contractors
• Tracking mileage and travel regularly
• Separating personal and business finances
Good habits from the beginning of the year can make claiming your next refund much easier.
How professional support can help
CIS refunds can sometimes feel complicated, especially when dealing with HMRC requirements and detailed expense claims.
Professional support can help you:
• Identify all allowable expenses
• Ensure your records meet HMRC standards
• Submit your Self Assessment accurately
• Maximise your refund while staying compliant
This can give you peace of mind and reduce the risk of delays or errors.
Final thoughts for CIS workers this April
The start of the new tax year is your opportunity to take control of your tax position and ensure you receive the refund you are entitled to.
Understanding your expenses, keeping proper evidence, and submitting your return correctly are the key steps.
Taking action early can help you avoid delays and make the process much smoother.
If you need help with your CIS refund or want to ensure your Self Assessment is completed correctly, contact Tax2u and our team will be happy to assist you.