Handing over your financial records to a UK accountant can feel like a huge weight off your shoulders. They’re trained to navigate the complex landscape of UK taxes and financial reporting. However, simply forwarding your paperwork and signing the final accounts or tax return, without a careful review, can leave you exposed to errors or missed savings. Taking an active role in understanding your accounts gives you confidence, equips you with better financial habits, and ensures that whatâs submitted in your name is accurate.
Legally, you, the taxpayer, are responsible for the correctness of your UK tax return, even if itâs prepared by an accountant. This makes it essential to develop the confidence to read, question, and understand your figures. Youâre not expected to become an accounting expert or to distrust your advisor, but building a collaborative relationship makes you an engaged, informed client. This proactive approach helps you spot mistakes, understand your financial standing, and make smarter business or personal financial choices.
This guide walks you through the vital checks you should perform on your own UK accounts and tax returns. Youâll learn what to look for, how to ask the right questions, and why growing financial knowledge is a valuable investment. By scrutinising the details, you can avoid unexpected HMRC tax bills and gain greater control over your finances.
Key takeaways
- You hold final responsibility: youâre legally responsible for your UK tax returnâs accuracy, even if it was created by an accountant.
- âTax dueâ is your starting point: if your tax bill seems unusually high (or low), itâs time to examine the calculations.
- Verify revenue figures: always cross-check the revenue reported by your UK business or self-employment against your own records.
- Scrutinise business expenses: thoroughly review expense categories – are all genuine business costs included, and do the figures make sense for the tax year?
- Ask about unfamiliar adjustments: itâs reasonable to ask your accountant about adjustments like prepayments or accruals. They should always be willing to explain.
- Communicate collaboratively: if you spot a discrepancy, approach your accountant with curiosity rather than accusation. Ask for clarification.
- Opt for ongoing services: consider monthly services to access regular communication with your accountant. And prevent end-of-year surprises.
Your first check: does the tax bill make sense?
When your accountant sends you your draft UK accounts or self-assessment return, most eyes dart straight to one figure – the tax due. This final number wraps up months of activity, but its plausibility is your key to a good review.
If the tax figure is much higher than expected, pause immediately. Start asking how it was calculated. Sometimes, large bills are caused by missed expenses, overstated revenues, or timing issues relating to the UK tax year.
Likewise, if your tax appears surprisingly low, donât celebrate just yet – it may mean income has been omitted or expenses have been claimed incorrectly. Submitting an inaccurate return can trigger penalties and HMRC investigations.
See this tax figure as the start – not the end – of your review process. If it feels âoffâ, youâre entitled to an explanation. Quality accountants welcome these conversations and are happy to walk you through their calculations so you can be confident signing off your submission.
The core components: reviewing revenue and expenses
After addressing the tax due, dig into the essentials: your business income (revenue) and outgoings (expenses), both of which need to be correct for your UK accounts.
Is your revenue accurately stated?
This is usually the simplest check. As a UK business owner or sole trader, you should know roughly how much youâve invoiced in the year to 5 April (the standard UK tax year for individuals).
- Match against your records: check your total revenue against what your own systems – accounting software, spreadsheets, or bank statements show.
- Include all sources: make sure every UK income stream (sales, services, part-time work) from the year is present.
- Check year-end cut-offs: most UK accounts are prepared on an accruals basis, so revenue is recognised when earned (issued invoices) rather than just when cash arrives. Confirm that reported figures are for activity within the right tax year.
If the revenue figure differs from what you expect, query it straight away. Mistakes can be innocent (a typo, a missed invoice), but they must be corrected before submission.
Have all allowable expenses been included?
A careful review of expenses is crucial if you want to pay only what you owe in UK tax. Check that every legitimate business cost is captured, which will reduce your taxable profit.
- Organise your expense evidence: did you share all UK receipts, bank and credit card statements, and spreadsheets with your accountant? The more detailed you are, the better.
- Review expense categories: expenses should be classified under familiar headings such as travel, computer equipment or professional fees.. Look for items that are missing or seem unusually high or low.
- Find omissions or duplicates: if you spent a lot on something (say equipment or supplies) and donât see it included, check why. It could also have been input under a different category or missed entirely.
- Understand disallowed expenses: some costs might be removed by your accountant because they arenât allowed for UK tax, such as fines or most entertaining costs. If you donât see something you expected, ask what HMRC rule excluded it. This is a smart way to build your knowledge and ensure your accountant is keeping you compliant.
Digging deeper: UK-specific accounting adjustments
Some items in your accounts may seem confusing at first glance. Provisions, accruals, and prepayments can sound technical but often relate to how the UK accounts for costs and income in the correct period.
Spotting misplaced figures and provisions
If you find a number that surprises you, it may relate to how costs are split over tax years. For example, annual subscriptions paid in advance, like software or insurance, are treated as âprepayments.â Suppose your UK companyâs financial year ends 31 December, and you pay ÂŁ1,200 in September for a year-long Microsoft 365 subscription. Only four monthsâ worth (ÂŁ400) gets expensed this year; the other ÂŁ800 is a âprepaymentâ that shifts to next yearâs accounts.
If you see a smaller expense than you expect, ask – remembering to detail what it is and where you found it, compared to the information you have.
Understanding bad debts in the UK
If a customer never pays for a service or goods, your invoice is still treated as revenue in the accounts, but later written off as a âbad debt.â For example:
- Revenue: +ÂŁ1,000
- Bad Debt Expense: -ÂŁ1,000
The end result for your profit is zero, reflecting the missing cash. Understanding this helps you make sense of why revenue appears for money you never received and why bad debts need tracking for both tax and business management.
Building a positive accountant-client relationship in the UK
Strong communication with your UK accountant is essential. Itâs best as a regular, two-way exchange, not just an annual check-in.
More regular engagement smooths year-end processes and helps you keep on top of your finances. Monthly or quarterly management accounts provide insights into your businessâs performance throughout the UK tax year. Benefits include:
- No last-minute surprises: youâll know in advance what your potential tax liabilities are and can budget accordingly, avoiding unexpected self-assessment or company bills.
- Better decision-making: frequent reports show which parts of your business are most profitable, helping with business planning and cash flow management.
- Easier year-end: little and often makes the final accounts review much simpler and reduces the stress of finding missing paperwork.
How to raise questions, the right way
When discussing your UK accounts, be constructive. Avoid blaming language like âThis is definitely wrongâ or âThe tax is too high.â Instead, say:
- âCan you help me understand these travel expenses?â
- âI thought revenue would be about ÂŁX – can we check my invoicing against whatâs in the accounts?â
- âWhat is included in âother provisionsâ this year?â
Being curious and open builds a better partnership and gets you the answers you need.
The help of RHJ Accountants
At RHJ Accountants, we aim to be your go-to UK accounting advisers, not just number-crunchers. Our mission is to offer reliable accounts and clear, jargon-free explanations. We want you to feel confident and empowered, whatever the size or nature of your UK earnings.
We encourage all our clients to be hands-on and ask questions. If you prefer, you can book a call to discuss your tax return line by line with your dedicated accountant. Or consult other team members for broader UK business advice. Transparency matters to us – if a mistake occurs, weâll be open and fix it quickly. If you want ongoing peace of mind, our monthly accounting service provides year-round support and helps you stay ahead of deadlines and regulatory changes in the UK.
Frequently asked questions
My UK accountant is the expert – why do I need to check their work?
Your accountant works with the information you provide. While they are expected to act diligently, only you can confirm the details truly reflect your businessâs daily reality. Ultimately, responsibility for the return lies with you, so a review is always in your best interest.
Iâm not a finance professional – what if I donât understand the documents?
Thatâs OK. Focus on what you know: does the income match your client invoices? Are the expenses you recall included? Anything unfamiliar can and should be raised with your accountant for plain-English clarification.
How much time does a thorough review need?
This depends on your business complexity. A simple UK sole trader might only need an hour or less, whereas company directors could need several hours. Take your time – the cost of missing an error could be far higher than the review time.
What are the usual mistakes to look out for?
Typical errors include typos in large numbers, omitting bank or credit card transactions, wrongly classifying personal expenses as business, or miscalculating tax relief on capital purchases.
My accountant seems defensive when I ask questions. What should I do?
A good UK accountant will appreciate your involvement and treat your questions as a positive sign. If youâre made to feel unwelcome or never get clear answers, consider if your current accountant is the right fit for your business needs.
