Every year, thousands of UK taxpayers ask the same question: do I really need an accountant, or can I do this myself?
The honest answer depends on your situation. For some people, a DIY Self Assessment is perfectly manageable. For others, attempting it without professional help is quietly costing them hundreds or thousands of pounds per year — in missed reliefs, over-paid tax, and HMRC penalties.
Here is how to decide.
When You Probably Do Not Need an Accountant
You can likely manage without professional help if:
- You are employed and your only extra income is small amounts of bank interest or dividends
- You are a sole trader with a very simple business, minimal expenses, and income well under £30,000
- You have one rental property with straightforward income and expenses and no mortgage
- You are comfortable using HMRC’s online portal and have time to keep accurate records throughout the year
Even in these cases, a one-off review by an accountant in your first year can be worth doing — if only to confirm you are not missing anything.
When an Accountant Pays for Itself
1. You Are Missing Expenses You Did Not Know Were Allowable
Most self-employed people and landlords filing their own returns miss at least some allowable expenses. Common examples: the business proportion of home costs, mileage, pre-trading expenses, replacement of domestic items (for furnished landlords), and Annual Investment Allowance on equipment. A good accountant typically saves new clients more than their annual fee in the first year alone.
2. Your Income Is Growing
Once your profits exceed £50,000-£60,000, tax planning becomes significantly more valuable. At this level, decisions about pension contributions, the timing of income and expenses, dividends vs salary (for directors), and business structure can save thousands per year.
3. You Own Multiple Properties
Multiple properties mean multiple income streams, potentially different ownership structures, Capital Gains Tax on disposals, Stamp Duty Land Tax on purchases, and the complexities of Section 24 (mortgage interest restriction). Getting any of these wrong can be very expensive.
4. You Run a Limited Company
Limited companies must file annual accounts with Companies House and a Corporation Tax return with HMRC — both of which have specific legal formats. Directors also often need personal Self Assessment returns. The penalties for late or incorrect filing can be significant. This is firmly in accountant territory for most small company owners.
5. You Received an HMRC Letter
If HMRC has opened an enquiry into your tax return, or you have received a nudge letter about undeclared income, get professional help immediately. HMRC investigations can be time-consuming and stressful — and a good accountant knows exactly how to respond to limit your exposure.
6. Making Tax Digital Is Now Mandatory for You
From April 2026, if your income exceeds £50,000, you must keep digital records and submit quarterly updates to HMRC. Many landlords and sole traders will need an accountant to manage this — both to set up the software correctly and to handle the quarterly submissions on time.
What a Good Accountant Actually Does (That You Might Not Realise)
A common misconception is that accountants just fill in forms. In reality, a proactive accountant:
- Reduces your tax bill by identifying reliefs and planning opportunities you would miss
- Saves you time — hours of confusing HMRC correspondence, form-filling, and record-keeping become their problem, not yours
- Keeps you compliant — they know when rules change and make sure your returns reflect current law
- Helps you plan ahead — advising on the right time to make a large purchase, take dividends, or expand your business
- Deals with HMRC on your behalf — including any enquiries or correspondence
- Helps you grow — understanding your numbers properly is essential for making good business decisions
What to Look for in an Accountant
- Clear pricing — you should know exactly what you pay and what is included before you commit
- Specialist knowledge — a good accountant for landlords understands property tax in depth; one for sole traders understands self-employment reliefs inside out
- Proactive communication — not just sending you a form to sign once a year
- Modern tools — using cloud software (Xero, QuickBooks) rather than spreadsheets and post
- Responsiveness — quick replies to queries, not weeks of waiting
Red Flags to Avoid
- Vague or hourly pricing (“it depends on time spent”) with no upfront quote
- No clear agreement on what is and is not included in the service
- Slow response times or difficulty getting hold of them
- Not asking you questions about your business — a good accountant needs to understand your situation
- Promising unrealistically low tax bills without clear justification
How Much Does an Accountant Cost?
For a sole trader with a straightforward income, expect to pay:
- £200-£400 per year for a basic Self Assessment filing service
- £39-£100+ per month for a full-service accountancy package including bookkeeping, quarterly reviews, and tax planning
For landlords with multiple properties or complex tax affairs, fees are typically higher — but the savings and peace of mind usually more than offset the cost.
Not sure if we are right for you? We offer a free initial conversation — no pressure, no commitment. Tell us your situation and we will tell you honestly whether professional help would pay off. Get a quote or contact us today.
