How a CIS Reclaim Gets Subcontractors’ Tax Back

A busy subcontractor can see 20% disappear from a payment before it reaches their bank account, then assume that money is gone for good. It is not. A CIS reclaim may allow you to recover tax deducted by contractors where you have paid too much overall. The key is treating it as part of your annual tax position, not as a separate pot of money that HMRC automatically sends back.

For many construction workers, the difficulty is not doing the work or getting paid. It is keeping hold of the paperwork, reporting income correctly and knowing which costs reduce the final bill. Get those points right and a refund can be straightforward. Get them wrong and an otherwise valid repayment can be delayed, reduced or queried by HMRC.

What is a CIS reclaim?

The Construction Industry Scheme, usually called CIS, requires contractors to deduct tax from payments to subcontractors for qualifying construction work. If you are registered for CIS, the standard deduction is usually 20%. If you are not registered, the deduction can be 30%. Contractors pay those deductions to HMRC and should provide you with a deduction statement showing what has been withheld.

For a sole trader or partnership, CIS deductions are payments towards your eventual income tax and National Insurance bill. They are not your final tax calculation. Once you submit your Self Assessment tax return, HMRC looks at your total income, allowable business expenses, tax already deducted under CIS and any other tax you have paid.

If the CIS tax deducted is more than you owe, you may be due a repayment. That repayment is commonly known as a CIS refund or CIS reclaim. The amount varies widely. A subcontractor with significant legitimate expenses, periods without work or a modest overall profit may have had more deducted than their final liability.

It is worth being realistic, though. A CIS deduction does not guarantee a refund. If your final tax and National Insurance liability is higher than the deductions taken, you may have a balance to pay instead.

Who can claim a CIS tax refund?

The route depends on how you trade. Sole traders and partners normally claim CIS deductions through their Self Assessment tax return. You report the full value of your construction income before deductions, claim the allowable expenses of running the business, then enter the CIS tax deducted during the tax year.

This last part is where many returns go wrong. Your turnover is the amount earned before the contractor took 20% off. Reporting only the net payment understates income, and then entering the deduction again can create figures that do not make sense. HMRC expects the gross income and the tax withheld to be shown separately.

Limited companies are different. CIS deductions suffered by a company are generally set against the company’s PAYE and National Insurance liabilities through payroll reporting, rather than claimed on a director’s personal tax return. Where deductions exceed the available payroll liabilities, there may be a repayment process after the end of the tax year. It needs to be handled carefully, particularly where the company has directors on payroll or has changed payroll arrangements during the year.

If you work through an umbrella company, are an employee of a contractor, or are unsure whether you are genuinely self-employed, do not assume that a CIS reclaim applies. Your employment status and payment arrangement matter just as much as the wording on site.

The records that make a CIS reclaim easier

Your monthly CIS deduction statements are the starting point. Each statement should identify the contractor, the payment period, the gross amount, materials where relevant, and the tax deducted. Keep every statement, even if the figures look familiar or the contractor has paid you regularly for years.

You should also retain invoices, bank statements and a clear record of work completed. HMRC may compare the CIS deductions claimed on your return with reports submitted by contractors. If a contractor has used the wrong Unique Taxpayer Reference, filed late or reported the deduction incorrectly, the mismatch can hold up your repayment.

Expenses matter because they establish your taxable profit. Common allowable costs for construction subcontractors can include tools and protective clothing, business mileage, vehicle running costs, phone use, accountancy fees, insurance, advertising, training that maintains existing skills, and the business share of home office costs. Materials and plant hire can also be significant, depending on the nature of the job and how you are paid.

The rule is not that every work-related purchase is claimable. The expense must be incurred wholly and exclusively for the business, or you must claim only the identifiable business proportion. Ordinary clothes, personal travel, fines and the cost of improving a personal skill outside your existing trade are examples that can cause problems. Good records give you a defensible claim without stretching the rules.

How the CIS reclaim process works

For a sole trader, the practical process begins by bringing together your income and expenses for the tax year, which runs from 6 April to 5 April. You then prepare and submit a Self Assessment tax return with the CIS deductions recorded in the appropriate section. HMRC calculates the final position from the information submitted.

Where a repayment is due, HMRC can issue it to your bank account once the return has been processed and any checks are complete. This is why accurate bank details and up-to-date contact information are useful. If you owe tax from an earlier year, have a payment on account due, or have other outstanding HMRC liabilities, some or all of the refund may be used against those amounts.

Do not confuse a repayment with a reason to delay filing. The normal online deadline for a Self Assessment return is 31 January following the end of the tax year. Filing early can put your figures in order sooner and gives more time to deal with missing CIS statements before the deadline pressure starts.

You can sometimes correct a submitted return, and claims for overpaid tax may be possible for earlier years, but the time limits and method depend on the circumstances. Leaving old records untouched because you assume it is too late is rarely a good approach. A review can establish whether action is still available.

Why valid CIS refunds are delayed

The most common issue is a mismatch between the deductions you claim and the deductions contractors have reported to HMRC. This can happen when a contractor enters the wrong Unique Taxpayer Reference, reports the wrong amount, or simply has not filed its monthly CIS return properly. Your deduction statement is evidence, but it may still be necessary to ask the contractor to correct its reporting.

Another issue is incomplete income. A subcontractor may provide CIS statements from the main contractor but overlook side work, labouring income, private jobs or other self-employed earnings. HMRC calculates tax on the complete picture, so all income must be included.

Finally, claims can be slowed by weak expense records. A neat spreadsheet is useful, but it is not a substitute for receipts, invoices and bank evidence. If you use cash for small purchases, record the date, supplier, amount and business purpose at the time. Trying to recreate a year of expenses from memory in January is a stressful and expensive habit.

Gross payment status is not always the right answer

Subcontractors who meet HMRC’s turnover, compliance and business tests may apply for gross payment status. This means contractors pay them without CIS deductions. It can be helpful for cash flow because you keep the money until your final tax bill is due.

However, gross payment status does not mean tax-free income, and it does not suit every business. You still need to budget for income tax and National Insurance, maintain strong records and file on time. For some workers, the regular CIS deductions provide a useful discipline. For others, especially firms with material costs, labour costs or tight working capital, retaining the cash can make a real operational difference.

The best choice depends on your financial habits, your expected profit and whether your tax affairs are consistently up to date. It should be a planned decision rather than a reaction to a single large deduction.

Get the figures right before asking for your money back

A CIS reclaim is often money that has already been earned and paid to HMRC on your behalf. But the fastest route to it is not an inflated expense claim or a rushed return. It is a complete set of deduction statements, properly recorded income, sensible evidence for expenses and a tax return that reflects how your business actually works.

For subcontractors juggling site work, invoices and family life, that support can be the difference between chasing paperwork and knowing where you stand. A specialist accountant such as Short And Sons Accountants can help turn the year’s records into a clear, compliant claim, leaving you more time to focus on the next job.