Claiming Back CIS Deductions as a Limited Company

At Towerstone Accountants we provide specialist CIS accountancy services for contractors and construction businesses across the UK. We created this webpage for subcontractors and contractors who want clear guidance on the Construction Industry Scheme, including registration, deductions, refunds, and ongoing reporting obligations. Our aim is to help you stay compliant with HMRC, avoid costly errors, and understand how CIS affects your tax position.

If you run a limited company in the construction industry and CIS deductions have been taken from your payments, I know from experience how confusing and frustrating it can feel at first. You see money withheld at source, your cash flow takes a hit, and it is not always obvious how or when you actually get that money back. The good news is that CIS suffered by a limited company is not lost, it can be reclaimed or offset, provided it is handled correctly through payroll and HMRC reporting.

In this article I will walk you through the process in plain English, based on real world UK practice and current HMRC guidance. I will explain how CIS works for limited companies, how deductions are recorded, how they are set against PAYE and National Insurance, and what to do if there is still CIS left over at the end of the year. By the end you should feel confident about the process and clear on the steps needed to recover what your company is owed.

Understanding CIS for limited companies

The Construction Industry Scheme applies to payments made by contractors to subcontractors for construction work. Many people associate CIS with sole traders, but limited companies are very much within the scope of the scheme.

When your limited company works as a subcontractor, the contractor paying you may deduct CIS at either 20 percent or 30 percent before paying your invoice. That deduction is then paid over to HMRC in your company’s name. From your point of view, it feels like tax has already been paid, but in reality it is a deduction on account rather than a final tax charge.

This distinction is important because a limited company does not reclaim CIS in the same way as a sole trader. There is no Self Assessment repayment claim for the company itself. Instead, CIS suffered is offset against the company’s PAYE liabilities through the payroll system.

How CIS deductions show up in practice

In day to day terms, CIS deductions usually appear on your remittance advice from the contractor. You might invoice £10,000 plus VAT, the contractor applies 20 percent CIS to the labour element, and you receive a reduced payment. That deducted amount is then reported to HMRC by the contractor under your company’s UTR.

From an accounting perspective, your company still recognises the full gross income, not the net amount received. The CIS deduction is treated as a prepayment of tax, not as an expense.

This is one of the first areas where limited companies often go wrong, particularly when bookkeeping is done without professional input. If CIS suffered is treated as a cost, you risk understating profits and creating problems later when HMRC records do not match yours.

Registering correctly under CIS

Before you can reclaim or offset CIS suffered, your limited company must be correctly registered with HMRC for both CIS and PAYE.

Your company needs:.

• A CIS registration as a subcontractor

• A PAYE scheme, even if you only have one director

Without an active PAYE scheme, there is nowhere for the CIS suffered to be offset. This is one of the most common issues I see when companies struggle to reclaim deductions. Directors sometimes delay setting up payroll because they are not yet paying themselves, but under CIS this can create unnecessary cash flow problems.

Once registered properly, HMRC’s systems can link CIS deductions suffered to your company’s PAYE account.

How limited companies actually reclaim CIS suffered

This is the key point that often causes confusion. A limited company does not receive a CIS refund cheque simply for having deductions taken. Instead, CIS suffered is offset against PAYE and National Insurance liabilities as they arise.

Each month or quarter when you run payroll, your company owes HMRC:.

• PAYE income tax deducted from salaries

• Employer’s National Insurance

• Employee’s National Insurance

• Any student loan deductions or other statutory items

CIS suffered is used to reduce this bill.

For example, if your monthly PAYE liability is £3,000 and you have suffered £4,500 in CIS deductions, you can offset the full £3,000, meaning no PAYE payment is due that month. The remaining £1,500 is carried forward to offset against future PAYE liabilities.

This continues until the CIS suffered has been fully used up.

Reporting CIS suffered through payroll

To make this work, the CIS suffered must be reported correctly through your payroll submissions.

When submitting your Employer Payment Summary, known as an EPS, you include the total CIS deductions suffered by your company in that tax month. HMRC then reduces your PAYE bill accordingly.

This step is crucial. If CIS suffered is not reported on the EPS, HMRC will not apply the offset, even if the deductions have been made by contractors. From HMRC’s perspective, the money is sitting on your account, but it has not been allocated.

In practice, I see this mistake more often than you might expect, particularly where payroll software is used without a clear understanding of CIS functionality.

Timing matters more than people realise

CIS offset works on a tax month basis, not an accounting period basis. This means timing is important.

If CIS is suffered in May, but you forget to include it on the May EPS, you cannot simply assume HMRC will sort it out later. It may need to be included in a later EPS, and delays can cause PAYE demands or late payment interest to be raised incorrectly.

From a forward looking perspective, this is why regular monthly payroll reporting is so valuable, even for small companies. It keeps CIS suffered moving through the system and avoids large balances building up unnecessarily.

What if there is no PAYE to offset against

A common question I am asked is what happens if a limited company suffers CIS but has very low or no PAYE liability. This often happens where the director takes a minimal salary or relies mainly on dividends.

In this situation, CIS can still be offset, but only up to the value of the PAYE liability. Any excess CIS suffered sits on the HMRC account until it can be used.

If there is still CIS left over at the end of the tax year, it does not disappear. It can either be carried forward into the next tax year or reclaimed through other routes, depending on circumstances.

However, there is no automatic cash refund simply because the year has ended. This is an area where planning becomes important.

Director salary planning and CIS recovery

One practical way to recover CIS suffered more quickly is through salary planning. By ensuring the director salary is set at an appropriate level, the company creates PAYE and National Insurance liabilities that can be offset against CIS.

This does not mean paying unnecessary tax. It means aligning salary strategy with the reality of CIS deductions already suffered. When done properly, this can significantly improve cash flow without increasing overall tax costs.

This is a good example of why CIS should never be looked at in isolation. It interacts directly with payroll, corporation tax, dividends, and cash flow planning.

How CIS suffered affects corporation tax

Another area of confusion is how CIS suffered interacts with corporation tax.

CIS deductions are not corporation tax. They do not reduce your corporation tax bill directly. Corporation tax is calculated on your company’s profits, based on income and allowable expenses.

However, if CIS suffered has not been fully offset against PAYE by the time corporation tax is due, it can sometimes be reallocated or reclaimed through HMRC, depending on the specific position of the company.

In practice, HMRC will often encourage companies to clear CIS balances through PAYE rather than issuing cash refunds, so forward planning remains important.

Keeping accurate records of CIS suffered

To reclaim CIS successfully, record keeping matters.

You should retain:.

• All contractor payment statements showing CIS deductions

• Monthly CIS suffered totals

• Copies of EPS submissions

• PAYE account statements from HMRC

These records help resolve disputes if HMRC’s figures do not match yours, which unfortunately does happen. Contractors sometimes submit incorrect returns or submit them late, and this can delay the credit appearing on your account.

From experience, having clean records makes resolving these issues far quicker and less stressful.

Common mistakes I see limited companies make

Over the years, I have seen a pattern of recurring errors when it comes to CIS suffered by limited companies.

These include:.

• Treating CIS deductions as expenses

• Not setting up PAYE early enough

• Forgetting to submit EPS forms

• Assuming CIS will be refunded automatically

• Leaving large CIS balances unreviewed for months

Each of these mistakes can be avoided with a basic understanding of how the system works and regular checks of your HMRC accounts.

What to do if HMRC records do not match yours

If your company has suffered CIS but HMRC is not showing the correct balance, the first step is to reconcile contractor statements against HMRC’s CIS records.

If there is a mismatch, it is usually due to one of three reasons. The contractor has submitted incorrect details, the return has not yet been processed, or the EPS has not been filed correctly.

In these situations, contacting HMRC with clear evidence tends to resolve the issue, but it can take time. This is another reason why I encourage companies to review CIS positions monthly rather than waiting until year end.

End of year position and next steps

At the end of the tax year, you should review how much CIS has been suffered and how much has been offset against PAYE. Any remaining balance should be understood and planned for.

If your company expects to continue suffering CIS in the following year, carrying the balance forward may make sense. If not, you may need to discuss repayment options with HMRC.

There is no single approach that suits every company, which is why tailored advice is often valuable at this stage.

Why professional oversight often pays for itself

CIS is one of those areas where the rules themselves are not overly complex, but the interaction between systems creates room for error. Payroll, PAYE, CIS, and corporation tax all intersect, and small mistakes can have disproportionate effects on cash flow.

From a forward looking point of view, having someone regularly review your CIS position helps ensure deductions are recovered efficiently and that your company is not effectively lending money to HMRC unnecessarily.

Final thoughts

Claiming back CIS suffered as a limited company is less about filling in a single form and more about understanding how the system fits together. When handled properly, CIS deductions reduce PAYE bills and support cash flow rather than creating frustration.

In my experience, companies that stay on top of payroll reporting, plan director remuneration sensibly, and keep clear records rarely struggle to recover CIS suffered. Those that ignore it or assume HMRC will sort it out automatically often end up waiting far longer than necessary for money that is rightfully theirs.

If there is one takeaway from this guide, it is that CIS suffered is your company’s money, but you have to actively manage the process to get it back.

You may also find our guidance on how to claim your cis refund from hmrc and what is a cis deduction helpful when dealing with related CIS questions. For a broader overview of CIS rules, compliance, and support, you can visit our CIS guidance hub.