Every self-employed Barrister meets the same rule when it comes to their Self Assessment tax return: an expense is only deductible if it was incurred wholly and exclusively for the purposes of the profession. Get that right and you reduce your taxable profit by every genuine cost of running your practice, from your chambers contribution to your wig and robes. Get it wrong, and you either overpay tax by leaving legitimate costs unclaimed, or claim for something HMRC would disallow. This guide sets out the principle behind the rule and works through the categories that come up most often for barristers, from pupillage through tenancy to silk.

The “wholly and exclusively” test

For Self Assessment purposes, HMRC allows a deduction for costs incurred “wholly and exclusively for the purposes of the profession.” In practice, this means the expense must have been incurred for a business reason (to enable you to practise at the Bar, take instructions, prepare a brief, or appear in court) rather than a personal one. Where a cost serves both a business and a personal purpose (a mobile phone contract, or the internet connection at home, for example), only the proportion that relates to your practice can be claimed, and you’ll need a reasonable basis for the split. This is the test that sits behind every category below, and it’s the one HMRC will apply if a claim is ever queried.

Expense categories relevant to barristers

Self-employed practice at the Bar carries a distinct set of costs that don’t map neatly onto a generic small-business expenses list. The categories below are the ones we see most often, whether you’re newly tenanted or an established silk.

Chambers rent, chambers contribution and clerks’ fees

The rent or chambers contribution you pay towards the running costs of chambers (premises, staff, marketing and administration), together with clerks’ fees for administering your diary, negotiating and collecting your fees, and general clerking and administrative support, are among the largest and most recurring costs of self-employed practice. Because they’re incurred specifically to enable you to practise from chambers and receive instructions, they’re allowable in full, typically deducted at source from fees collected on your behalf before the balance reaches you.

Court fees and bank charges

Court filing fees and other charges incurred in the course of a case, along with business bank account fees and interest on borrowing taken out for practice purposes, are also allowable. Keep these separate from any personal banking so they’re straightforward to identify at year end.

Professional indemnity insurance

Professional indemnity insurance is compulsory for practising barristers and is a straightforward allowable expense: you cannot practise without it, and it exists purely to protect your professional activity.

Bar Council, BSB and Inn fees

Your annual Bar Standards Board (BSB) practising certificate fee, and any Bar Council subscriptions required to maintain your right to practise, are allowable business expenses. Inn of Court subscription and dining costs that are directly tied to qualifying for Call to the Bar, or to requirements imposed as part of your training, will generally also qualify; ordinary Inn membership or social dining beyond what’s required for your professional status is less straightforward, and worth checking with us if you’re unsure where the line falls in your own case.

Legal research subscriptions and law reports

Subscriptions to legal research platforms such as Westlaw or LexisNexis, along with law reports, practitioner texts and specialist databases used to prepare cases and advise clients, are allowable, since they’re incurred directly to enable you to do the work of a barrister.

Business travel: chambers, court and client meetings

Travel between chambers, court and conferences with solicitors or clients is generally allowable, together with reasonable subsistence: meals while travelling for work, and hotel accommodation where an overnight stay is genuinely required, such as attending a trial in another city. The key distinction HMRC draws is between travel to a temporary workplace and ordinary commuting. A trip to a court outside your usual circuit, or to an unfamiliar venue for a particular case, is travel to a temporary workplace and is typically allowable. Your regular journey between home and chambers, your permanent base of practice, is ordinary commuting and is not allowable, on the same basis as it isn’t for any other self-employed professional.

If you use your own car for practice-related travel, you can claim a mileage allowance rather than tracking actual running costs: HMRC’s approved mileage rate for the 2026 to 2027 tax year is 55p per mile for the first 10,000 business miles, and 25p per mile after that. Public transport fares (train, bus or taxi) for the same journeys are allowable in full; keep the tickets or booking confirmations alongside your mileage log.

Robes, wigs and court attire

Court dress (robes, wigs, wing collars and bands) required specifically for advocacy is a distinctive, profession-specific cost and is generally allowable, because these are items you would have no reason to buy or wear outside your professional life. This is quite different from everyday clothing worn to chambers or court, which is not allowable (see below).

CPD required to maintain your practising status

Continuing Professional Development undertaken to maintain your practising certificate, and other training relevant to developing your practice or advocacy skills, is an allowable business expense.

Home working costs

Where you genuinely carry out work at home, preparing briefs, drafting advices, dealing with paperwork outside chambers hours, a reasonable proportion of the related household costs, such as heating, lighting, internet and telephone, can be claimed. The proportion needs to reflect actual business use, apportioned fairly between the time and space used for practice and the rest of the household’s ordinary living costs.

As a simpler alternative to working out an actual proportion, HMRC’s flat-rate simplified expenses can be used instead, based on hours worked from home each month:

Technology and equipment

Laptops, tablets and phones used for drafting, legal research or client communication, case and practice management software, and the cost of repairing or maintaining that equipment, are allowable business expenses. Where a device is also used privately, only the business-use proportion can be claimed.

Building your practice: website, branding and networking

The cost of creating or maintaining a professional website or online profile, and reasonable fees for attending networking or professional development events aimed at developing your practice or client base (including Direct Access work), are allowable.

Accountancy and professional fees

Fees paid for accountancy, bookkeeping and other professional advice relating to your practice, including our own fees, are themselves an allowable business expense.

Stationery, postage and office supplies

Everyday stationery, postage, printing and general office supplies used in the course of your practice are deductible in full.

Professional books and library costs

Beyond core research subscriptions, textbooks and reference works bought to build or maintain your professional library are deductible, provided they relate to your practice area rather than general reading.

What you can’t claim

Some costs are commonly, and mistakenly, claimed by the self-employed generally, but fail the wholly-and-exclusively test and are not allowable for a barrister’s practice. These include:

• Everyday clothing: suits, shirts and ordinary work clothing worn to chambers or court are a personal cost, regardless of where they’re worn, and are quite distinct from robes and wigs, which are allowable (see above).
• Client entertainment: meals, drinks or hospitality provided to solicitors, clients or other professional contacts.
• Fines and penalties: parking fines, speeding fines and similar penalties are never deductible, whatever the business context in which they arose.
• Ordinary commuting: your regular travel between home and your permanent base of practice at chambers is a personal cost, not a cost of the business itself.
• Purely personal expenditure: anything with no genuine business purpose, even if it happens to arise during a working day.

Keep your records

Whatever you claim, keep the receipts, invoices and any supporting notes: a mileage log for travel to a temporary workplace, a note of how you’ve calculated the business proportion of a shared cost, or the invoice for your BSB practising certificate. Good records make your Self Assessment return straightforward to prepare each year and are exactly what HMRC will ask for if your return is ever checked. This matters more, not less, once quarterly digital reporting under Making Tax Digital becomes part of your routine.

You don’t need expensive software to do this well. We provide clients with a simple income-and-expenses spreadsheet, designed specifically around how barristers bill and get paid, at no extra cost. Most of our clients find it’s all they need. If you’d prefer a cloud-based option, we’re equally happy to help you get set up with Xero, QuickBooks or FreeAgent. Either way, every expense you claim should be discussed with us first to make sure it’s a valid claim before it goes anywhere near your tax return.

This guide is for general information only and does not constitute tax advice. Whether a specific cost is allowable depends on the facts of your own practice and circumstances, and rules can change, so please contact us to discuss your own position before relying on anything above for your tax return.