Barrister Self-Assessment: Complete Guide to Filing Your Tax Return

Last updated: 28 February 2026

Filing a self-assessment tax return is an annual obligation for every practising barrister in England and Wales. Whether you are a newly called junior or a senior silk, HMRC expects accurate, timely returns – and mistakes can trigger penalties, interest charges, and unwelcome enquiries. This guide walks through the entire process from registration to submission, with a worked example showing exactly how a junior barrister’s first return might look.

Who Needs to File a Self-Assessment Tax Return

You must file a self-assessment return if you are:

• A self-employed barrister (the vast majority of the practising Bar)
• A pupil barrister who has received taxable income, including pupillage awards above the personal allowance
• An employed barrister with untaxed income exceeding £2,500 (for example, occasional direct access work alongside a salaried role)
• Any individual whose total taxable income exceeds £150,000, regardless of employment status

In practice, virtually every self-employed barrister must file. Even if your gross fees fall below the personal allowance in your first year of practice, HMRC still requires a return once you have registered for self-assessment.

Registering with HMRC as a Self-Employed Barrister

You must register with HMRC for self-assessment by 5 October following the end of the tax year in which you first became self-employed. For most barristers, this means registering shortly after completing pupillage and accepting your first brief.

Registration can be completed online via the HMRC website using form CWF1 (registering as a new self-employed individual). You will need:

• Your National Insurance number
• Your date of birth
• Your contact details and chambers address
• The date your self-employment started
• A description of your business activity – use “barrister” or “legal services”

HMRC will issue you a Unique Taxpayer Reference (UTR) by post within 10 working days. You need this UTR to file your return and to provide to your chambers clerk for any tax deductions.

If you have previously been employed (for example, as a paralegal or in another career), you may already have a UTR. Check your HMRC online account before registering again.

The Self-Assessment Timeline and Deadlines

The UK tax year runs from 6 April to 5 April. For the 2025/26 tax year:

Late filing penalties: Miss the 31 January deadline by even one day, and you face an automatic £100 penalty. After three months, daily penalties of £10 per day (up to 90 days) apply. After six months, a further penalty of 5% of the tax due (or £300, whichever is greater). After twelve months, an additional 5% or £300.

There is no benefit to filing early other than peace of mind and earlier refunds. However, filing early does not mean you must pay early – payment is still due on 31 January regardless of when you submit.

What Records to Keep

HMRC requires self-employed barristers to retain records for at least five years after the 31 January submission deadline for the relevant tax year. For 2025/26, that means keeping records until at least 31 January 2032.

Essential records include:

• Fee notes – every fee note issued to solicitors, chambers, or direct access clients
• Bank statements – all accounts through which practice income and expenses flow
• Expense receipts – travel, professional subscriptions, practising certificate, books, robes, IT equipment
• Chambers rent statements – showing your share of chambers overheads and clerk’s commission
• Legal aid payment schedules – from the Legal Aid Agency
• VAT records – if you are VAT-registered
• Mileage logs – if claiming vehicle expenses

Digital records are acceptable. Most barristers now use cloud accounting software to maintain records, which will become essential under Making Tax Digital for Income Tax from April 2026.

Completing the SA100 and Supplementary Pages

The self-assessment return consists of the main form (SA100) plus supplementary pages relevant to your circumstances. As a self-employed barrister, you will typically need:

SA100 – Main Return

This captures your personal details, total income summary, tax reliefs, student loan repayments, pension contributions, and the overall tax calculation. Complete this section last, as figures flow from the supplementary pages.

SA103S or SA103F – Self-Employment (Short or Full)

This is the critical page for barristers. Use the short version (SA103S) if your annual turnover is below £85,000. Use the full version (SA103F) if turnover exceeds £85,000 or if you wish to claim capital allowances beyond the annual investment allowance.

Key sections include:

• Business description: “Barrister” or “Self-employed barrister”
• Accounting period: Usually 6 April 2025 to 5 April 2026 (tax year basis, following the basis period reform)
• Turnover: Total gross fees received or receivable
• Expenses: Each category of allowable expenditure
• Net profit: Turnover minus allowable expenses

If you use the cash basis, report income when received and expenses when paid. Most barristers with turnover under £150,000 now use cash basis by default.

SA101 – Additional Information

Required if you have foreign income, trust income, or certain other less common income types. Most barristers will not need this page.

SA108 – Capital Gains

Only required if you have disposed of assets (shares, property, etc.) during the year. Not typically relevant to your practice income but may apply to personal investments.

Income: Fee Notes, Legal Aid, and Direct Access Work

Barristers’ income typically comes from three main sources, all of which must be declared:

Fee Notes to Solicitors

The majority of your income will come from fee notes rendered to instructing solicitors. Under cash basis accounting, declare fees when the money hits your bank account, not when you issue the fee note. Under accruals basis, declare when the fee note is raised.

Legal Aid Payments

Payments from the Legal Aid Agency are taxable income. These are often received months or years after the work is performed. Under cash basis, declare in the year received. Keep careful records of graduated fee payments, interim payments, and final determinations.

Direct Access and Public Access Work

Fees from lay clients under the direct access scheme are treated identically to solicitor fee notes for tax purposes. Ensure you account for any VAT charged if you are VAT-registered.

Expenses: Key Deductions for Barristers

Allowable expenses directly reduce your taxable profit. Barristers can typically claim the following:

For a comprehensive breakdown of every deduction available, see our detailed guide on tax deductions for barristers and expenses for barristers.

Payments on Account

If your self-assessment tax bill exceeds £1,000, HMRC requires you to make payments on account – advance payments towards next year’s tax bill. Each payment is 50% of the previous year’s liability.

How Payments on Account Work

Suppose your total tax and Class 4 NIC liability for 2025/26 is £8,000. You would pay:

• 31 January 2027: £8,000 (the 2025/26 bill) plus £4,000 (first payment on account for 2026/27) = £12,000 total
• 31 July 2027: £4,000 (second payment on account for 2026/27)
• 31 January 2028: Balancing payment for 2026/27 (if actual liability exceeds the two payments on account), plus first payment on account for 2027/28

This “bunching” of payments in January of your second year catches many newly self-employed barristers off guard. Budget carefully – in January of your second year of practice, you may owe 150% of a full year’s tax in a single payment.

Reducing Payments on Account

If you expect next year’s income to be lower (for example, if you are taking a period of maternity or paternity leave, or moving to employed practice), you can apply to reduce your payments on account via your self-assessment return or by contacting HMRC. Be cautious: if you reduce too much and underpay, interest will be charged.

Common Mistakes Barristers Make on Their Tax Returns

Having prepared hundreds of barristers’ tax returns, we see these errors repeatedly:

1. Mixing cash basis and accruals basis – Pick one and apply it consistently. If you switch, the transitional rules must be followed correctly.
2. Claiming initial wig and gown purchase – HMRC treats the first purchase of court dress as capital expenditure with no tax relief. Only replacements are allowable.
3. Forgetting to declare legal aid income – Payments from the LAA often arrive in a different tax year from when the work was done. Every payment must be declared in the year received (cash basis) or earned (accruals).
4. Claiming ordinary commuting – Travel from home to your regular chambers is not allowable. Travel from chambers to court, or to a temporary workplace, is allowable.
5. Ignoring Class 2 NIC – Class 2 National Insurance (£3.45 per week in 2025/26) is payable if your profits exceed the Small Profits Threshold (£6,725). It is collected through self-assessment.
6. Not budgeting for payments on account – The January payment in your second year of practice can be a nasty surprise. Set aside 30-35% of net profit from day one.
7. Failing to keep digital records – With Making Tax Digital approaching, paper-based record keeping will no longer be sufficient.
8. Late registration – Missing the 5 October registration deadline attracts a separate penalty, even if you eventually file on time.

Worked Example: Junior Barrister Filing Their First Return

Sarah was called to the Bar in October 2024 and completed pupillage in September 2025. She accepted a tenancy and began practising independently on 1 October 2025. This is her first self-assessment return for the 2025/26 tax year (1 October 2025 to 5 April 2026 – six months of practice).

Income

Allowable Expenses

Tax Calculation

National Insurance Contributions

Summary

Sarah’s effective tax rate on her £30,974 net profit is 15.7%. However, she must pay £7,317.29 on 31 January 2027 – a significant outlay that includes nearly half of next year’s estimated tax. Proper budgeting from the start of practice is essential.

Making Tax Digital: How Quarterly Reporting Changes Self-Assessment from April 2026

From April 2026, self-employed barristers with gross income exceeding £50,000 must comply with Making Tax Digital for Income Tax Self Assessment (MTD for ITSA). Those earning between £30,000 and £50,000 will follow from April 2027.

Under MTD, you must:

• Keep digital records using HMRC-compatible software (spreadsheets alone will not suffice)
• Submit quarterly updates to HMRC (by the 7th of each quarter-end month: August, November, February, May)
• File an End of Period Statement confirming that your quarterly figures are correct
• Submit a Final Declaration replacing the current self-assessment return by 31 January

The quarterly updates replace much of the annual self-assessment return. You will still need to declare reliefs, pension contributions, and other adjustments in the Final Declaration, but your income and expenses will already have been reported throughout the year.

If your gross income is below £50,000 for 2025/26, you are not required to join MTD immediately. However, adopting digital record-keeping now will make the transition smoother when your income crosses the threshold – or when the £30,000 threshold applies from April 2027.

Frequently Asked Questions

When do I need to file my self-assessment tax return?

Online returns for the 2025/26 tax year must be filed by 31 January 2027. Paper returns have an earlier deadline of 31 October 2026. Payment of any tax owed is also due by 31 January 2027.

Can I use the cash basis for my barrister tax return?

Yes. Most barristers with turnover under £150,000 use the cash basis, which means you declare income when received and expenses when paid. This is simpler than accruals accounting and is now the default method for eligible self-employed individuals.

What happens if I miss the 31 January deadline?

You face an automatic £100 penalty, with further daily penalties of £10 per day after three months (up to 90 days). After six and twelve months, additional penalties of 5% of the tax due or £300 (whichever is greater) are charged. Interest also accrues on unpaid tax from the due date.

Do I need to register for self-assessment during pupillage?

If your pupillage award exceeds the personal allowance (£12,570 in 2025/26), or if you receive additional taxable income, you should register. Some pupillage awards are paid under PAYE by the Inn or chambers, in which case a return may not be required unless you have other untaxed income.

Can I claim the cost of my wig and gown?

The initial purchase of court dress is treated as a capital expense and is not tax-deductible. However, replacement items (a new wig to replace a worn one, replacement bands, etc.) are allowable as a revenue expense.

How much tax should I set aside from each fee payment?

A prudent rule of thumb is to set aside 30-35% of your net profit (after expenses). This covers income tax, Class 2 and Class 4 National Insurance, and provides a buffer for payments on account. In your first year, consider setting aside 40% to cover the January bunching effect.