Do I Need an Accountant as a Sole Trader?

The short answer

There is no legal requirement to use an accountant as a sole trader. HMRC does not mandate it, and plenty of freelancers file their own self-assessment tax returns accurately every year without professional help.

Whether you should use one is a different question. It depends on the complexity of your finances, your confidence with numbers, how much your time is worth, and whether the tax savings or peace of mind are worth the cost.

For many early-stage freelancers with a single income stream, simple expenses, and no VAT registration, the self-assessment return is genuinely not that difficult. For others, particularly those with higher incomes, multiple clients, VAT obligations, or plans to incorporate, an accountant can pay for themselves several times over.

What an accountant actually does for you

Before you hire one, it helps to know what you are actually getting. A sole trader accountant typically:

• Prepares and files your self-assessment return, reviewing your income and expenses, calculating your tax liability, and submitting to HMRC before the deadline
• Identifies allowable expenses you may not have thought to claim, their knowledge of HMRC's guidance can often reduce your tax bill by more than their fee
• Handles correspondence with HMRC, if you get a letter or enquiry, your accountant deals with it
• Advises on structure, when to move from sole trader to limited company, whether to register for VAT voluntarily, how to handle a pension
• Provides year-round guidance, you can call them in September to ask “can I claim this?” rather than guessing
• Prepares accounts, a formal set of accounts is useful if you need to apply for a mortgage or business loan

An accountant is not just a form-filler. A good one is a tax adviser and a sounding board for business decisions.

When you probably do not need one

You can likely handle things yourself if:

• Your only income is from freelancing (no PAYE job alongside, no rental income, no investments)
• You are not VAT-registered
• Your expenses are basic, software, equipment, a proportion of your phone bill
• Your profit is relatively modest (under roughly £30,000 per year)
• You are organised, you keep records, hold receipts, and know when the deadlines are
• You have used HMRC's GOV.UK self-assessment system before and found it manageable

HMRC's own self-assessment portal is genuinely well-designed. If you can clearly articulate your income, deduct your allowable expenses, and handle one or two supplementary pages, you can file your own return. Many freelancers do this every January in an afternoon.

When an accountant is worth it

Consider hiring one if:

• Your income is growing past £40,000–£50,000, the more you earn, the more tax is at stake, and the more valuable good advice becomes
• You have multiple income streams, PAYE employment plus freelancing, or rental income alongside consultancy work, adds complexity
• You are registered for VAT, quarterly VAT returns, the Flat Rate Scheme, and Making Tax Digital compliance are genuinely time-consuming
• You are thinking about incorporating, the decision about when and how to move to a limited company has significant tax implications; an accountant earns their fee here
• You have received an HMRC enquiry, even a routine compliance check is stressful without professional representation
• You have had an unusual year, sold a business asset, received a large one-off payment, or started an overseas client arrangement
• Your time is worth more than the accountant costs, if doing your own return takes 15 hours of stress and an accountant charges £400, and your day rate is £400, it may just not be worth doing yourself

What does an accountant cost?

For a sole trader with a simple set of accounts and a self-assessment return, expect to pay roughly:

• £200–£400/year, basic self-assessment return preparation from a small local practice or an online accountant
• £400–£800/year, for more comprehensive service including VAT returns, bookkeeping review, and year-round advice
• £800–£1,500+/year, for a limited company with payroll and more complex affairs

Online accountancy services (Crunch, GoSimpleTax, TaxScouts, Gorilla Accounting) often undercut traditional practices and can be a good option if your finances are uncomplicated. They typically offer a fixed annual fee rather than charging by the hour.

Accountant fees are themselves a tax-deductible expense, which reduces the real cost.

Alternatives to a full accountant

You do not have to choose between a full accountant and going it completely alone. A few middle-ground options:

Self-assessment software

Tools like GoSimpleTax, TaxCalc and FreeAgent walk you through your return step-by-step and submit directly to HMRC. They reduce the risk of errors and are significantly cheaper than an accountant, typically £20–£80 for a sole trader return.

Bookkeeping software

Keeping tidy books throughout the year (using a tool like FreeAgent, Wave, or even a well-structured spreadsheet) means less work at tax time, whether you file yourself or hand it to an accountant. An organised set of records means accountants charge you less, because the work is already done.

One-off tax consultation

Many accountants offer a fixed-price consultation for an hour or two. You can prepare your questions in advance (Can I claim this expense? Should I go VAT-registered? What salary should I take from my company?) and get professional answers without signing up for a full service.

HMRC helpline and GOV.UK

HMRC's guidance on GOV.UK is more thorough than many people realise. For simple questions about allowable expenses or self-assessment deadlines, it is often the quickest and most authoritative source available.

Questions to ask before hiring an accountant

If you do decide to hire one, do not just go with the first name you find. Ask:

• Do you work with many sole traders and freelancers?, you want someone who knows the typical expense categories and does not need educating about how freelancing works
• What is included in your fixed fee?, self-assessment only, or does it include VAT returns, payroll, bookkeeping review?
• Are you Making Tax Digital compliant?, they should be using MTD-compatible software and filing digitally
• Are you registered with a professional body?, look for ICAEW, ACCA, or CIMA membership. “Accountant” is not a protected title in the UK, anyone can call themselves one
• How do I contact you during the year?, email, phone, a client portal? Know what you are getting
• What happens if HMRC investigates me?, some accountants include investigation insurance; others charge by the hour for enquiry work

A good accountant should feel like a business partner, not just a form-processor. If you are not getting proactive advice, it may be time to find someone who engages more.