Making Tax Digital · Sole traders
Electricians and builders: tracking materials and labour on site
ONLY£15A MONTHA profitable job can generate a messy trail of supplier receipts, customer payments and subcontractor deductions.
A profitable job can generate a messy trail of supplier receipts, customer payments and subcontractor deductions. Separating materials from labour helps you understand the job and, where CIS applies, check deductions. It also makes a bank-connected bookkeeping record much more useful.
Record what was bought and who paid
Keep the itemised receipt, job reference and payment method. A trade-counter bank description does not tell you whether the basket contained materials for a customer, tools kept by the business or something for home.
Materials recharged to a customer are normally part of the business transaction, not simply money that can disappear from turnover. The precise treatment depends on whether you supplied the goods or acted as a genuine agent. Keep the contractual facts clear.
CIS needs more than a labour label
Under CIS, qualifying materials and other permitted exclusions affect the deduction calculation. Do not reduce the deduction base by a guessed materials figure. Keep evidence of costs and compare the contractor's statement. HMRC's subcontractor guide explains the deduction framework.
Capture a readable receipt promptly, but verify the extracted amount and date. If you also import the card transaction, match the evidence to the purchase rather than creating a second expense.
Worked example: the merchant receipt
A builder pays £360 at a supplier: £240 for customer materials, £90 for a tool retained by the business and £30 for a private repair. The customer invoice includes the agreed charge for materials and labour.
The records identify all three purchase elements. The £30 is private; the tool needs the appropriate equipment treatment. The entire £360 is not automatically job materials simply because the retailer is a builders' merchant.
Start with the business purpose
An expense category describes a cost; it does not decide whether the cost qualifies for relief. The starting point is whether the spending was for the trade. Where an identifiable part was private, keep that part out of the claim. A personal withdrawal is not an expense simply because it leaves the business bank account.
HMRC's self-employed expenses guide explains the distinction between running costs, capital expenditure and private use. For example, a supplier may sell both equipment and household products. The shop's name is useful evidence, but the invoice tells you what you bought.
Record the full transaction and the business calculation clearly. If a £120 bill has £30 of identifiable private spending, a £90 business claim is easier to explain when both amounts and the reason for the split are retained. Do not delete the private part merely to force the bookkeeping total to resemble the tax deduction.
Nor is a deduction a reimbursement. Spending £100 to save a fraction of that amount in tax still leaves you with a real cost. Buy what the business needs, keep appropriate evidence and claim the relief available under the correct rules.
Give equipment its own review
The tax treatment of equipment depends on the accounting basis and the asset, not just its price. Under the cash basis, many business equipment purchases are deducted when paid. Cars and certain other expenditure are exceptions. Under traditional accounting, a purchase with lasting business use may instead enter the capital-allowances calculation.
HMRC's capital-allowances guide explains the available routes. Annual Investment Allowance can cover qualifying plant and machinery, subject to its conditions and limit, but it does not apply to cars. Accounting depreciation is not itself the tax deduction.
Keep the purchase invoice, date, payment evidence and any finance agreement. A finance instalment can combine capital and interest, so treating every payment as an ordinary running cost may give the wrong answer. Record private use where relevant and retain the disposal paperwork when equipment is sold or part-exchanged.
For an expensive or unusual purchase, resolve the treatment before relying on a tax estimate. A category chosen from the merchant name cannot tell you whether an item was bought outright, leased, used privately or acquired as part of a larger building project.
Reconcile receipts, not just bank payouts
A bank deposit is not always the original sale. A platform, card processor or agent may deduct fees before sending you the balance. Keep the statement showing the gross amount, deductions, refunds and final payout, then explain the difference in your records.
Cash needs the same attention. Record customer cash when received under the cash basis, even if some of it is spent before the rest reaches the bank. Banking cash already recorded as a sale is a transfer between your cash and bank records, not another sale.
HMRC's record-keeping guidance covers income and business expenses. The useful practical test is whether another person could follow a payment from the original sale to the amount received without counting it twice.
Do not use bank feeds as a reason to ignore payment accounts, credit cards, cash or payments made personally for the business. List every place where business money passes, choose the source for each type of transaction and review transfers between those sources. This turns reconciliation into a repeatable check rather than a search through several unrelated statements.
Make the van a collection point, not an archive
Capture receipts while safely parked, label unusual purchases and clear unreadable images before the paper fades. Review supplier credits as well as invoices. At month end, compare supplier statements and bank payments to catch missing or duplicated records.
Take the next step
Avona.app offers a self-service route from £15/month. Bring your records together, review the figures and choose a workflow that fits your business. For professional help, discuss the scope and total price of Avona Concierge, managed by chartered accountants, before choosing a service.