Making Tax Digital · Sole traders
Five expense and income categories to check before an MTD update
ONLY£15A MONTHAutomatic categorisation can speed up bookkeeping, but familiar merchant names do not settle the tax treatment.
Automatic categorisation can speed up bookkeeping, but familiar merchant names do not settle the tax treatment. A focused review of recurring problem areas can reveal errors that a grand-total check misses. Keep the transaction and correct its nature rather than deleting inconvenient entries.
Check these five areas
- Clothing: protective clothing and qualifying uniforms differ from ordinary clothes worn to work. A business occasion does not make an everyday outfit deductible.
- Client entertaining: a customer's dinner is not automatically travel subsistence, even when business is discussed.
- Residential property finance: an individual landlord's restricted finance costs should not simply be treated as a full ordinary rental expense.
- CIS receipts: distinguish gross sales, net bank receipts and tax deducted. CIS deductions are not routine business costs.
- Fines: separate normal parking or road charges from penalties imposed for contraventions.
HMRC's expense guide provides the starting rules for trade costs. Property and CIS questions also require their specific treatment rather than a generic expense category.
Follow the evidence through to the summary
Inspect the receipt, invoice or statement behind each doubtful amount. Correct the source record, preserve any private or disallowed element and confirm how the summary now treats it. A category rule should support a decision already justified by the facts.
Worked example: two parking payments
A £12 parking charge and a £70 parking penalty appear under similar descriptions. The first relates to qualifying business travel; the second is a fine. The reviewer retains both bank entries but distinguishes the disallowed amount.
The account still reconciles. The tax analysis improves because the two payments are no longer treated as identical expenses.
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.
A review that checks more than the total
Start with coverage: the correct person, business and period, plus all relevant accounts and cash records. Then look at completeness. A feed can be connected today while still missing an earlier week. Confirm the earliest and latest transactions against the source.
Next, inspect unusual items. Large transfers, loan receipts, refunds, net settlements and private purchases often need more context than a bank description provides. Check for duplicate imports where a statement overlaps a live feed. An automatic warning is useful evidence to investigate, not proof that the entry must be removed.
Finally, review category totals. A category unexpectedly showing zero, a large increase or a negative amount deserves an explanation. You do not have to make every annual tax adjustment at this stage, but you should understand the records behind the summary you approve.
HMRC explains what quarterly updates contain. Keep the approved version and the resulting acknowledgement together. If something later changes, correct the source record and use the software's supported update process so you can explain which figures are current.
Keep the evidence connected to the figures
Your digital record should explain the amount, date and nature of the transaction. Keep the invoice, receipt, statement or other evidence that supports it. A photograph can make a paper document easier to retain, but a folder of photographs alone does not create complete transaction records.
For sole traders, HMRC normally requires business records to be kept for at least five years after the relevant 31 January filing deadline. Keep them longer where the rules for a late return, enquiry or other circumstances require it. Check the record-retention guidance.
Make the records usable by your future self. Include a short explanation where a bank description is vague, retain the calculation behind a business-use split and make corrections traceable. For a missing receipt, try the supplier account, email confirmation or a replacement invoice before relying on incomplete evidence.
At review time, compare your records with the bank or payment account and investigate differences. Equal totals are useful, but two errors can cancel each other out. A sample of individual transactions can reveal a duplicated purchase or an omitted customer receipt that a totals-only check misses.
Save rules only after checking their reach
Test proposed rules against mixed purchases, refunds and unusual transactions. Record why a cost is private or disallowed. Revisit the summary after corrections, and leave any genuine annual adjustments on a clearly owned review list.
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.