
Looking for Accountants Who Understand CIS Needs?
If you are looking for accountants who understand CIS subcontractor needs, you are probably not after a glossy report full of jargon. You need somebody who understands why a missing deduction statement can hold up a tax return, why receipts get lost after a long week on site, and why a CIS refund is not simply money that appears because somebody has filled in a form.
Construction work moves quickly. Your accountant needs to keep up with the paperwork, the deadlines and the practical questions that come with being paid under the Construction Industry Scheme. The right support should leave you clearer about your tax position, not chasing answers when the Self Assessment deadline is getting close.
What makes CIS subcontractor accounting different?
CIS is not just another type of self-employment. Under the scheme, contractors deduct tax from payments to many subcontractors for construction work, then send that deduction to HMRC. For a registered subcontractor, the usual deduction rate is 20%. If the subcontractor is not registered or cannot be verified, a higher rate of 30% may apply. Some businesses are paid gross, but this must be approved by HMRC.
Those deductions are payments towards your eventual tax and National Insurance bill. They are not necessarily the final amount you owe. Whether you receive a refund, have no further tax to pay, or need to make an additional payment depends on your total income, allowable expenses and personal circumstances for the tax year.
That is why a CIS return cannot be prepared properly from bank statements alone. An accountant who understands the trade will ask for your monthly deduction statements, invoices, records of materials where relevant, and details of the genuine costs of doing your work. They will also know when something needs checking rather than making assumptions that could cause problems later.
The paperwork that makes a real difference
Monthly CIS deduction statements are central to your claim. They show the contractor’s details, the gross amount paid, the tax deducted and the period the payment relates to. If a statement is missing, the accountant should help you establish what is needed to support the deduction rather than simply entering a figure and hoping it is accepted.
Good records also make it easier to distinguish between income for labour and amounts relating to materials. Under CIS, deductions are generally made from the labour element and not from qualifying materials or VAT. The detail matters. Getting it wrong can affect both the tax withheld and the records used for your tax return.
Looking for accountants who understand CIS subcontractor needs? Ask better questions
A useful accountant will not talk at you from a distance. They should ask how you work. Are you paid by one contractor or several? Do you provide your own tools? Do you travel from job to job? Are you also taking on private work, employing someone, or thinking about moving into a limited company?
The answers affect the advice. A subcontractor working for several firms may have a very different expense profile from somebody who has worked on one long-running site. Likewise, operating through a limited company brings different reporting and tax obligations from working as a sole trader. There is no one-size-fits-all answer, and an accountant should be honest about that.
Before appointing an accountant, it is reasonable to ask how they handle CIS statements, whether they review your expenses before submitting your return, and how they will explain your likely tax position. You should also know who you can speak to when a contractor has made an error or HMRC sends a letter you do not understand.
A good working relationship is often more valuable than the cheapest headline fee. Saving a small amount on an annual return is poor value if errors, missed claims or unanswered questions leave you out of pocket.
Expenses: claim what is allowed, not what sounds plausible
Allowable expenses reduce taxable profit when they are incurred wholly and exclusively for your trade. For many CIS subcontractors, common examples can include tools and equipment, protective clothing, professional subscriptions, accountancy fees, business insurance, advertising, mobile phone costs relating to work, and the business element of vehicle running costs.
Travel needs care. Travel between temporary workplaces may be allowable, but ordinary commuting to a permanent place of work is usually not. The distinction can be frustrating, particularly when construction sites change, but it should not be ignored. Your accountant should discuss the pattern of your work before treating mileage or travel costs as a claim.
The same applies to meals, clothing and home-office costs. A branded uniform or necessary protective clothing is different from everyday clothing that could be worn outside work. A proportion of a phone bill may be appropriate where it is used for work, but claiming the whole bill without evidence may not be. Straight answers are more useful than overconfident promises of a bigger refund.
Keep receipts, invoices and mileage records as you go. A photograph stored securely is often better than relying on a fading paper receipt at the end of the year. Regular bookkeeping also helps spot whether deductions and payments shown on your records make sense.
A refund is possible, but it should be calculated properly
Many subcontractors have tax deducted throughout the year at 20%, even when their final liability is lower once expenses and personal allowances have been taken into account. That can lead to a CIS tax refund after the Self Assessment return is filed.
However, a refund is not automatic and should never be treated as guaranteed. Other income, outstanding tax, student loan repayments, National Insurance and previous HMRC balances can all affect the final result. Where tax has been deducted but HMRC’s records do not match, the position may need investigating before any repayment is made.
A specialist accountant should give you a realistic estimate where possible, explain the evidence behind it and submit the correct figures. That reduces the risk of a claim being delayed because information was incomplete or deductions were not properly supported.
Do not let compliance become a last-minute job
For most self-employed subcontractors, the Self Assessment tax return for a tax year ending on 5 April must be filed online by 31 January following the end of that tax year. Any balancing payment is normally due by the same date. Depending on your circumstances, payments on account may also be required, which can catch people out in their first profitable years.
If you become a contractor yourself, the responsibilities increase. You may need to register for CIS, verify subcontractors, make monthly deductions, file CIS returns and issue deduction statements. Late or inaccurate returns can lead to penalties, so it is worth putting the right process in place before the first payment goes out.
VAT, payroll and Making Tax Digital can add another layer as your business grows. This is where an accountant who understands operational pressure earns their keep. The aim is not to create more admin. It is to set up a routine that gives you the information you need while keeping HMRC obligations under control.
The value of practical trade-focused support
The best accountant for a CIS subcontractor combines technical knowledge with common sense. They understand that you may be on site early, travelling between jobs and dealing with contractors who do not always produce paperwork promptly. They should make it straightforward to send records, ask questions and keep your affairs moving.
Short And Sons Accountants supports subcontractors who want clear CIS advice, properly prepared tax returns and help claiming tax deductions accurately. Whether you are newly self-employed, have several contractors, or need to put right a return that has become confusing, practical support can take a considerable weight off your shoulders.
Resource material
For further reading, consult HMRC’s guidance on the Construction Industry Scheme, HMRC guidance on Self Assessment tax returns, HMRC’s rules on business expenses for the self-employed, and HMRC guidance on payments on account.
The right accountant should make CIS feel manageable rather than mysterious. If you have further questions about any topic covered here, call Short And Sons Accountants for a free no obligation quote and a straightforward conversation about your circumstances.



