CIS Tax Refunds — How Construction Workers Can Claim Back Overpaid Tax

If you work in the construction industry as a subcontractor, there is a very good chance you are paying too much tax, and you may not even know it. Under the Construction Industry Scheme (CIS), contractors deduct tax at source before paying you. The standard CIS deduction rate is 20%, and if your actual tax liability is lower than what has been deducted throughout the year, you are entitled to a refund from HMRC.

At YRF Accountants, based in Bolton and serving clients across Manchester and the wider UK, we help construction workers and subcontractors reclaim every penny of overpaid CIS tax quickly, accurately, and without the stress.

What Is the Construction Industry Scheme (CIS)?

The Construction Industry Scheme is a set of HMRC rules that governs how payments are made between contractors and subcontractors in the construction sector. Under CIS, contractors are required to deduct tax from payments made to subcontractors and pass those deductions to HMRC.

There are three CIS tax deduction rates:

• 0% — for subcontractors with gross payment status
• 20% — for subcontractors registered under CIS
• 30% — for subcontractors not registered under CIS

Most subcontractors fall into the 20% bracket. However, once you factor in your allowable expenses and personal allowance, many subcontractors find their actual tax bill is significantly lower than the amount deducted which means a refund is owed.

Why Do Construction Workers Overpay Tax Under CIS?

CIS deductions are made at a flat rate without accounting for your individual circumstances. This means the deductions do not consider:

• Your personal allowance (£12,570 for the 2024/25 tax year)
• Allowable business expenses such as tools, materials, fuel, and protective clothing
• Periods when you were not working
• Mileage and vehicle costs for work-related travel
• Pension contributions

Once these deductions are properly applied through a self-assessment tax return, most CIS subcontractors discover they have overpaid tax and are entitled to a refund.

What Can You Claim as a CIS Subcontractor?

To maximise your CIS tax refund, it is important to claim all allowable expenses. As a subcontractor, you may be able to claim:

How to Claim a CIS Tax Refund — Step by Step

Claiming your CIS tax refund is done through a self-assessment tax return. Here is how the process works:

Step 1: Register for Self-Assessment

If you are not already registered, you must notify HMRC that you need to complete a self-assessment tax return. The deadline to register is 5 October following the end of the tax year in which you became self-employed.

Step 2: Gather Your CIS Deduction Statements

Your contractors must provide you with monthly CIS deduction statements showing how much has been deducted from your payments. Make sure you have all of these for the relevant tax year.

Step 3: Record All Allowable Expenses

Compile all your business-related expenses throughout the year. Keeping clear records and receipts throughout the year makes this process significantly easier.

Step 4: Complete Your Self-Assessment Return

File your tax return, declaring your gross CIS income, the deductions made, and all allowable expenses. HMRC will calculate your actual tax liability and issue a refund if you have overpaid.

Step 5: Receive Your Refund

HMRC typically processes CIS refunds within four to eight weeks of the tax return being submitted. Refunds are usually paid directly into your bank account.

Key Deadlines for CIS Tax Refund Claims

Missing HMRC deadlines can cost you money or result in penalties. Here are the key dates to know:

• 5 October — Deadline to register for self-assessment for the previous tax year
• 31 January — Online self-assessment filing deadline
• 31 October — Paper self-assessment filing deadline

You can claim CIS refunds for up to four previous tax years, so even if you have missed past years, it may not be too late.

How YRF Accountants Can Help Construction Workers in Bolton and Manchester

At YRF Accountants, we specialise in working with construction workers, subcontractors, and CIS contractors across Bolton, Manchester, and the wider UK. Our team understands the nuances of CIS accounting and knows how to ensure every allowable expense is claimed so you receive the maximum refund you are entitled to.

Our CIS services include:

• CIS subcontractor registration and compliance
• Annual self-assessment tax returns for subcontractors
• CIS refund claims, including claims for previous tax years
• CIS contractor monthly returns and compliance
• Bookkeeping and expense tracking for construction businesses

Whether you are a sole trader plasterer in Bolton, a self-employed electrician in Manchester, or run a small construction firm anywhere in the UK, we can help you stay compliant and recover overpaid tax.

Frequently Asked Questions

How much is the average CIS tax refund?

The average CIS refund varies depending on your income and expenses, but many subcontractors receive refunds of between £500 and £2,500 per year. Higher earners with significant expenses may receive considerably more.

Can I claim a CIS refund if I also have employment income?

Yes. If you have both employment income (PAYE) and self-employment income under CIS, you still need to file a self-assessment return, and you can still claim a refund for CIS overpayments.

How far back can I claim a CIS tax refund?

You can claim a CIS tax refund for up to four previous tax years. For example, in 2024/25 you can still claim for the 2020/21 tax year onwards.

Do I need an accountant to claim a CIS refund?

You do not legally need an accountant, but using one significantly increases the likelihood that you claim all allowable expenses and receive the maximum refund. An experienced CIS accountant will often recover far more than their fee.

What happens if I miss the self-assessment deadline?

If you miss the 31 January deadline, HMRC will charge an automatic £100 penalty, with further penalties the longer the return remains unfiled. Acting quickly to file, even late, will reduce the total penalties owed.

Can limited company contractors claim CIS refunds?

Yes. If your limited company has had CIS deductions made from payments, these can be offset against your PAYE liabilities as a contractor. If the deductions exceed your PAYE liability, you can reclaim the excess directly from HMRC.

Ready to Claim Your CIS Refund?

Stop leaving money on the table. If you are a construction worker or subcontractor who has had CIS deductions taken, you could be owed a significant tax refund. Our team at YRF Accountants makes the process simple, fast, and stress-free.

Book a free 30-minute consultation today: https://calendly.com/yrfaccountants-info/30min