Running your own business is exciting. But somewhere between chasing invoices, serving clients, and trying to actually enjoy your life, the question creeps in: do I really need an accountant, or can I just handle this myself?

It's a fair question — and the honest answer is: it depends. Here's a clear-eyed guide to help you decide.

What does an accountant actually do for a sole trader?

At the most basic level, an accountant will:

• Prepare and file your self-assessment tax return
• Make sure you're claiming every allowable expense
• Keep you compliant with HMRC deadlines
• Advise you on how to structure your finances tax-efficiently

But a good accountant does more than just compliance. They act as a financial sounding board — someone who can tell you whether that piece of equipment is worth buying before the tax year ends, or whether you're better off registering for VAT voluntarily.

When you can probably manage without one

There are situations where going it alone is perfectly reasonable:

• Your income is straightforward. If you have one source of self-employment income, no rental properties, no investments, and no complex expenses, your tax return is unlikely to be complicated.
• You're comfortable with numbers. If you're happy using HMRC's online portal and you understand the basics of allowable expenses, you may be able to file accurately yourself.
• Your income is low. If you're in the early stages and earning below the personal allowance (£12,570 for 2026/27), your tax liability may be minimal.

When you should seriously consider an accountant

The calculation changes quickly once any of the following apply:

• You're turning over more than £30,000–£40,000 a year. At this level, the tax savings an accountant can identify typically outweigh their fees many times over.
• You have multiple income sources. Employment income, freelance work, rental income, dividends — each adds complexity and risk of errors.
• You're spending hours on admin. Your time has a value. If bookkeeping and tax prep are eating into billable hours, the maths often favour outsourcing.
• You've received a letter from HMRC. Don't face an enquiry alone.
• You're unsure what you can claim. This is one of the most common — and costly — mistakes sole traders make. Underestimating expenses means overpaying tax.
• You're thinking about going limited. If you're considering incorporating, you need professional advice first.

The hidden cost of getting it wrong

Many sole traders assume the cost of an accountant is the main consideration. But the cost of not having one can be higher:

• Missed deductions add up fast. A sole trader missing just £3,000 in legitimate expenses pays an extra £600–£900 in tax (depending on their rate).
• Late filing penalties start at £100 and escalate quickly.
• HMRC errors are difficult and stressful to resolve without professional support.

What does it actually cost?

For a straightforward sole trader self-assessment, you should expect to pay anywhere from £200–£600 per year for a one-off return. Monthly packages that include bookkeeping, VAT, and ongoing support typically start from around £80–£150 per month depending on complexity.

Framed differently: if an accountant saves you £1,000 in tax and charges you £400, you're £600 better off and you've reclaimed the hours you'd have spent staring at HMRC's website.

The bottom line

You don't legally need an accountant as a sole trader. But for most people running a business with any meaningful turnover, the combination of tax savings, time saved, and peace of mind makes it well worth the cost.

If you're on the fence, most accountants — including us — offer a free initial consultation. There's no obligation, and it'll give you a clear picture of whether professional help makes sense for your situation.

If you've never filed a self-assessment tax return before, the prospect can feel genuinely daunting. HMRC's systems aren't exactly known for their warmth and clarity. But the process is more manageable than it looks — especially once you know what to expect.

This guide walks you through every step, in plain English.

Who needs to file a self-assessment return?

You need to file a self-assessment return if, in the tax year, you were:

• Self-employed (sole trader or in a partnership) and earned more than £1,000
• A company director
• Earning more than £100,000 from employment
• Receiving rental income
• Receiving income from savings, investments, or dividends above certain thresholds
• Claiming Child Benefit while earning over £60,000
• Living abroad but earning UK income

If you're not sure whether you need to file, HMRC has an online checker — or you can ask an accountant.

Step 1: Register with HMRC

Before you can file, you need to register for self-assessment. Do this by 5 October after the end of the tax year in which you became liable. Go to gov.uk/register-for-self-assessment and follow the prompts. HMRC will send you a Unique Taxpayer Reference (UTR) number by post — this can take up to 20 working days, so don't leave it late.

Step 2: Gather your information

Before you start filling in your return, pull together:

• Your UTR number and National Insurance number
• P60 or P45 if you were employed at any point
• Records of all self-employment income (invoices, bank statements)
• Receipts and records for all business expenses
• Bank interest statements
• Any dividend vouchers
• Rental income and expenses if applicable
• Pension contributions

The more organised your records throughout the year, the less painful this step is. Cloud accounting software like Xero or FreeAgent makes this significantly easier.

Step 3: Log in to HMRC online services

Go to gov.uk/log-in-file-uk-tax-return. You'll need your Government Gateway login — if you don't have one, you'll be prompted to create one. Once in, navigate to Self Assessment and select Complete your tax return.

Step 4: Work through the sections

The return is divided into sections. You'll work through:

Personal details — name, address, UTR, NI number.

Employment — if you had any PAYE employment, you'll enter figures from your P60 here.

Self-employment — you'll enter your total income and allowable expenses. HMRC will calculate your profit, which is what gets taxed.

Other income — rental income, savings interest, dividends, etc.

Reliefs and allowances — pension contributions, Gift Aid donations, and other reliefs that reduce your tax bill.

Step 5: Check the calculation

Once you've entered everything, HMRC will show you a tax calculation. Check it carefully. Common things to look out for:

• Is your profit figure correct after expenses?
• Have all reliefs been applied?
• Does the amount owed look reasonable given your income?

If something looks wrong, go back and check your figures before submitting.

Step 6: Submit and pay

The deadlines you need to know:

• 31 January — online filing deadline and payment deadline for the tax owed
• 31 July — payment on account deadline (if applicable)
• 5 October — registration deadline for new filers

You can pay via bank transfer, direct debit, or BACS. Set a reminder — HMRC charges interest on late payments.

Common mistakes to avoid

• Missing expenses. Many first-time filers underestimate what they can claim. Use of home as office, mileage, professional subscriptions, software, training — these all count.
• Forgetting payments on account. If your tax bill is over £1,000, HMRC requires advance payments toward next year's bill. This catches a lot of first-timers off guard.
• Missing the deadline. The £100 automatic penalty for missing 31 January is avoidable with a diary reminder.
• Not keeping records. HMRC can ask to see evidence of any figure on your return for up to 5 years after the filing deadline.

Would you rather someone else handled it?

There's absolutely no shame in handing your return to an accountant. Most people who do it once, do it themselves the second time with more confidence — or decide their time is better spent elsewhere and keep using a professional.

Either way, the important thing is that it gets done accurately and on time.

One of the first — and most consequential — decisions you'll make when starting a business is how to structure it. For most people in the UK, the choice comes down to operating as a sole trader or setting up a limited company.

Both are entirely legitimate. Both have real advantages. The right answer depends on your income, your circumstances, and your plans for the future.

What is a sole trader?

A sole trader is the simplest way to run a business. You register with HMRC, keep records of your income and expenses, and file a self-assessment tax return each year. That's largely it. You and your business are legally the same entity. Your business income is your personal income.

What is a limited company?

A limited company is a separate legal entity from you. It has its own accounts, its own tax obligations, and its own legal standing. You are a director of the company — and typically a shareholder too. The company pays Corporation Tax on its profits. You pay yourself through a combination of salary and dividends.

The main differences

Tax

This is usually the deciding factor. As a sole trader, all your profit is subject to Income Tax and National Insurance. As a limited company director, you can structure your income more tax-efficiently — taking a small salary (minimising NI) and the rest as dividends (which are taxed at lower rates than income).

The tax savings can be meaningful — but they reduce at higher income levels, and they depend on your specific situation. As a very rough guide, if your profit is consistently above £30,000–£40,000, a limited company structure often starts to make financial sense. Below that, the tax saving may not justify the additional admin.

Admin and cost

Sole trader: minimal. One self-assessment return per year. Low accounting costs. Limited company: significantly more. You need to file annual accounts with Companies House, submit a Corporation Tax return, manage payroll (even for yourself), and keep more detailed records. Accounting fees are higher.

Liability

As a sole trader, you are personally liable for any debts or legal claims against your business. If things go wrong, your personal assets are at risk. As a limited company director, your personal liability is generally limited to the value of your shares — which is why it's called a "limited" company. This protection matters more in some industries than others.

Perception and credibility

Some clients — particularly larger businesses and public sector organisations — prefer or require suppliers to be limited companies. If you're targeting corporate clients, this may influence your decision.

Privacy

Limited company accounts are filed at Companies House and are publicly available. If you'd rather your turnover wasn't visible to anyone who searches your company name, that's worth factoring in.

When to stay as a sole trader

• You're just starting out and your income is modest
• Your business is low-risk and unlikely to face claims
• You value simplicity and want to keep admin minimal
• Your profit is below £30,000 and the tax saving doesn't stack up

When to consider going limited

• Your profit is consistently above £30,000–£40,000
• You want the protection of limited liability
• You're working with corporate clients who expect it
• You're planning to grow, take on staff, or bring in investors
• You want to retain profits in the company rather than draw them all out

Don't rush the decision

Many people incorporate too early, adding cost and complexity before the tax saving justifies it. Others stay as sole traders too long and leave real money on the table.

The right time to go limited is when the benefits — financial, legal, or commercial — outweigh the additional administration. That point is different for everyone.

If you're unsure where you stand, a short conversation with an accountant will give you a clear picture based on your actual numbers.

If you've heard the phrase "Making Tax Digital" and quietly hoped it didn't apply to you, you're not alone. HMRC's MTD programme has been rolling out gradually since 2019, and many business owners still aren't entirely sure what it means for them.

Here's everything you need to know — in plain English.

What is Making Tax Digital?

Making Tax Digital (MTD) is HMRC's initiative to move the UK tax system entirely online. The goal is for businesses and individuals to keep digital records and submit tax information to HMRC using compatible software, rather than filling in forms manually or using spreadsheets.

The rationale from HMRC's side is reducing errors and the "tax gap" — the difference between what's owed and what's actually paid. Whether you agree with the approach or not, it's happening.

MTD for VAT — already mandatory

If your business is VAT-registered, MTD already applies to you. Since April 2022, all VAT-registered businesses — regardless of turnover — have been required to:

• Keep digital VAT records
• Submit VAT returns using MTD-compatible software

If you're still submitting VAT returns manually through HMRC's old online portal, you're not compliant. This is an area where professional help pays for itself quickly.

MTD for Income Tax — coming for sole traders and landlords

This is the big change on the horizon. MTD for Income Tax Self Assessment (MTD for ITSA) will require sole traders and landlords to:

• Keep digital records of income and expenses
• Submit quarterly updates to HMRC (four times a year instead of once)
• Submit a final declaration at the end of the tax year

The current timetable:

• April 2026 — mandatory for sole traders and landlords with income over £50,000
• April 2027 — extended to those with income over £30,000
• April 2028 — extended to those with income over £20,000

These dates have shifted before, but the direction of travel is clear. If you're a sole trader or landlord earning above these thresholds, it's not too early to prepare.

What does "quarterly reporting" actually mean?

Instead of filing one annual tax return, you'll submit summary income and expense data to HMRC four times a year — broadly aligned with the quarters ending July, October, January, and April.

This doesn't mean you'll pay tax four times a year. Your actual tax liability is still calculated annually. But you will need to have organised, up-to-date records throughout the year rather than scrambling to pull everything together in January.

For many business owners, this will represent a significant change to how they manage their finances. For those already using cloud accounting software, the transition will be much smoother.

What software do you need?

HMRC won't provide free MTD software. You'll need to use compatible third-party software. The most widely used options are:

• Xero — popular with small businesses and their accountants
• QuickBooks — strong feature set, good for growing businesses
• FreeAgent — particularly popular with freelancers and sole traders

All three are MTD-compatible for VAT and are being updated for MTD for ITSA.

What should you do now?

If MTD for VAT already applies to you, make sure you're using compatible software and submitting correctly.

If you're a sole trader or landlord who will be caught by MTD for ITSA, the best thing you can do now is:

1. Start keeping digital records if you aren't already
2. Choose and set up accounting software before it becomes mandatory
3. Talk to an accountant who can help you transition smoothly

The businesses that struggle with MTD are those who leave it until the last minute. The businesses that handle it well are those who treat it as an opportunity to get properly organised.

One of the most common — and most expensive — mistakes sole traders and freelancers make is underestimating what they can claim as a business expense.

HMRC allows you to deduct any expense that is "wholly and exclusively" incurred for business purposes. In practice, this covers far more than most people claim.

Here are ten expenses that are frequently missed.

1. Use of home as office

If you work from home — even part of the time — you can claim a proportion of your household costs as a business expense. This includes heating, electricity, broadband, and even rent or mortgage interest (for the business-use portion). As a sole trader, you can use HMRC's simplified flat rate based on your monthly hours worked at home: £10/month for 25–50 hours, £18/month for 51–100 hours, and £26/month for over 100 hours. Alternatively, you can calculate the actual business-use proportion of your household bills — which almost always results in a higher deduction.

2. Mileage

If you use your own car for business travel, you can claim 45p per mile for the first 10,000 miles and 25p per mile thereafter. This covers fuel, servicing, insurance, and wear and tear. Many self-employed people forget to track their business mileage throughout the year, losing a deduction that can be worth hundreds of pounds. A mileage tracking app (many are free) makes this effortless.

3. Professional subscriptions and memberships

Annual membership fees for professional bodies, trade associations, and industry organisations are fully deductible — provided they're relevant to your business. This includes bodies like ICAEW, AAT, the Law Society, or sector-specific trade groups.

4. Training and professional development

Courses, workshops, and qualifications that update or improve skills you use in your current business are allowable. Note: training for an entirely new career or business area generally isn't deductible. Online courses, webinars, books, and subscriptions to professional publications all count.

5. Software and subscriptions

Any software you use for business — accounting software, project management tools, design tools, cloud storage, communication platforms — is fully deductible. This includes your monthly Xero or QuickBooks subscription, Microsoft 365, Zoom, and similar.

6. Bank charges and interest

Business bank account fees, payment processing charges (Stripe, PayPal, SumUp), and interest on business loans are all deductible expenses.

7. Marketing and advertising

Website costs, domain registration, hosting fees, social media advertising, print materials, and any other marketing spend is fully deductible. If you paid someone to build or maintain your website, that cost is claimable too.

8. Accountancy and professional fees

The fee you pay your accountant is itself a deductible business expense. So is legal advice relevant to your business, such as reviewing contracts or employment disputes.

9. Equipment and technology

Laptops, phones, cameras, tools, and other equipment you use for business purposes can be claimed. If an item is used partly for business and partly personally, you claim the business-use proportion. Under the Annual Investment Allowance, most equipment purchases up to £1 million can be deducted in full in the year of purchase rather than depreciated over time.

10. Pension contributions

Personal pension contributions don't reduce your self-employment profit directly, but they do attract tax relief — meaning the government tops up what you put in. At the basic rate, a £80 contribution becomes £100 in your pension. Higher-rate taxpayers can claim additional relief through their self-assessment return, making pension contributions a particularly tax-efficient way to save.

A word of caution

The "wholly and exclusively" rule matters. Expenses that are partly personal can only be claimed for the business-use portion. HMRC can and does query returns that look unusual, so keep receipts and records for everything you claim.

If you're unsure whether something is claimable, ask. It's a much easier conversation to have with an accountant before you file than with HMRC after.

Choosing an accountant is one of the most important decisions you'll make for your business. Get it right, and you have a trusted adviser in your corner. Get it wrong, and you could be paying too much, missing deadlines, or simply not getting the support you need.

Here's what to look for — and a few things to watch out for.

What to look for

Relevant qualifications

The UK accounting profession has several recognised qualifications. The main ones to look for are:

• ICAEW (ACA) — Institute of Chartered Accountants in England and Wales. One of the most respected qualifications in the profession.
• ACCA — Association of Chartered Certified Accountants. Widely recognised, particularly strong in practice.
• AAT — Association of Accounting Technicians. A respected qualification, particularly for bookkeeping and accounts preparation.
• CIMA — Chartered Institute of Management Accountants. More focused on management accounting than practice.

Anyone can call themselves an accountant in the UK — it's not a protected title. Working with someone who holds a recognised qualification means they're bound by professional standards, have continuing professional development requirements, and are subject to a complaints process.

Relevant experience

Qualifications matter, but so does experience with businesses like yours. An accountant who specialises in large corporate clients may not be the best fit for a sole trader or small limited company — and vice versa. Ask whether they regularly work with businesses of your size, in your sector, and with your specific needs.

Clear, fixed pricing

You should always know what you're paying before you commit. A good accountant will give you a clear, fixed-fee quote based on your specific needs. Be cautious of hourly billing without a cap — costs can escalate quickly and unpredictably.

Responsiveness

This matters more than people realise. If your accountant takes days to reply to a simple question, that's a problem — especially when HMRC deadlines are involved. Ask upfront: what's your typical response time? Who is my main contact? What happens if my contact is unavailable?

Software compatibility

Most modern accountants work with cloud accounting software — Xero, QuickBooks, or FreeAgent. If you're already using one of these, make sure your accountant is familiar with it. If you're not set up yet, ask what they recommend and whether they'll help you get started.

A proactive approach

The best accountants don't just process your numbers — they flag opportunities and risks. If all you're getting is a completed return with no commentary, you may be missing out on advice that could save you real money.

What to avoid

Unqualified or unregulated practitioners

As noted, "accountant" is not a protected title. Anyone can offer accounting services without any qualification. Always verify credentials — most professional bodies have online registers where you can check membership.

Vague pricing

If a firm won't give you a clear quote upfront, that's a warning sign. Unexpected bills are a common source of frustration with accountants.

One-size-fits-all service

Your business is specific. Your accountant's advice should be too. Be wary of firms that seem to offer identical packages to every client without asking much about your actual situation.

Poor communication

If it's hard to get a straight answer in the initial conversation, it's unlikely to improve once you're a client.

Someone who just tells you what you want to hear

A good accountant will sometimes give you advice you don't like. Honest advice — delivered with care — is what you're paying for.

Questions to ask before you commit

• Are you qualified, and with which body?
• Do you have experience with businesses like mine?
• What does your pricing look like for my needs?
• How quickly do you typically respond to queries?
• Will I have a dedicated contact, or will I be passed around?
• What software do you use, and will you help me set it up?
• What does a typical year of working together look like?

The right fit matters

Beyond qualifications and price, the relationship matters. You're going to share sensitive financial information with this person, and you want to feel comfortable asking questions — even ones you think might sound obvious.

A short introductory call with two or three firms will quickly tell you a lot about communication style, approachability, and whether it feels like a good fit.