Tax Guide for Consultants and Management Advisors

The Accounted Business Team·8 February 2026·7 min read

Whether you advise businesses on strategy, operations, IT, HR, or finance, working as a self-employed consultant gives you freedom — and tax responsibilities. This guide covers everything consultants and management advisors need to know about tax for the 2025/26 tax year.

Sole Trader vs Limited Company

Before we get into expenses, you need to understand the structure you are working under, because it affects everything.

Sole trader — You and the business are the same legal entity. You pay income tax and National Insurance through Self Assessment. Simpler and cheaper to run.

Limited company — A separate legal entity. You pay yourself a salary and dividends, and the company pays Corporation Tax. More tax-efficient at higher income levels but involves more admin and costs.

As a rough guide, if your annual profit is consistently above £40,000-£50,000, a limited company may save you tax. Below that level, the admin costs often eat up any savings.

This guide focuses primarily on sole traders, but we will cover IR35 for those operating through a company.

What Expenses Can Consultants Claim?

Consultants often have lower material costs than other trades but higher professional and travel expenses. Here is what you can claim.

Home office

Most consultants work from home at least part of the time. You have two options for claiming home office costs:

Flat rate method (simplified expenses):

25 to 50 hours of business use per month: £10 per month
51 to 100 hours: £18 per month
101 hours or more: £26 per month

Actual costs method:

Calculate the proportion of your home used for business. If you have a dedicated office that is one room out of five, and you use it for business 80% of the time, you can claim that proportion of:

Rent or mortgage interest (not capital repayments)
Council tax
Electricity and gas
Water rates
Broadband
Home insurance

For most consultants working 40+ hours a week from a home office, the actual costs method gives a significantly larger deduction than the flat rate. But it requires more record keeping.

Capital gains warning: If you claim a room is used exclusively for business, it could affect your Principal Private Residence relief when you sell your home. To avoid this, make sure the room has some personal use as well (even if minor).

Travel to client sites

Travel from your home office to a client's premises is a business journey, not commuting, provided your home is genuinely your business base. This is a significant benefit for consultants.

Claim travel costs using either:

Mileage rates: 45p per mile for the first 10,000 business miles, 25p thereafter
Actual vehicle costs: business proportion of fuel, insurance, servicing, depreciation

You can also claim:

Train and bus fares
Taxis
Parking fees
Congestion charges
Hotels and meals if you need to stay overnight at a client site

For meals, HMRC only allows you to claim for meals away from your normal place of work that are a necessary part of your business travel. Grabbing lunch near your home office does not count.

Professional memberships

Membership fees for professional bodies related to your work are deductible. This includes:

Chartered Management Institute (CMI)
Institute of Consulting
Association for Project Management (APM)
British Computer Society (BCS) for IT consultants
CIPD for HR consultants
Any other body relevant to your specialism

Professional indemnity insurance

PI insurance protects you if a client claims your advice caused them financial loss. For consultants, this is essential. The annual premium is fully deductible.

Public liability insurance, if you have it, is also deductible.

Training and professional development

Courses, conferences, seminars, and training that maintain or update your existing skills are deductible. A management consultant attending a leadership conference can claim the cost. A management consultant learning to become a plumber cannot — that is acquiring a new skill for a different trade.

Books, journals, and online subscriptions related to your field also count.

Technology and equipment

Laptop, monitor, keyboard, and mouse
Printer and ink
Software subscriptions (Microsoft 365, project management tools, CRM)
Cloud storage and backup services
Mobile phone (business proportion)
Broadband (if not already claimed under home office)

Items costing up to £1,000 can be deducted in full in the year of purchase through the Annual Investment Allowance.

Marketing and business development

Website design, hosting, and maintenance
LinkedIn Premium or advertising
Business cards
Networking event fees
Client entertainment is not deductible for tax purposes, even though it is a genuine business cost. You can record it in your accounts, but you must add it back when calculating your taxable profit.

Accountancy and professional fees

Fees for your accountant, bookkeeper, or tax adviser are deductible. So are legal fees that relate to your business (such as reviewing a contract).

IR35: The Rules for Consultants Working Through a Company

If you work through your own limited company and provide services to clients, IR35 may apply to you. IR35 is the tax legislation designed to catch people who would be employees if they were not working through a company.

How it works

Since April 2021, if your client is a medium or large business (in the private sector), they are responsible for determining your IR35 status. If they decide you are inside IR35, they (or the agency paying you) must deduct PAYE tax and National Insurance from your fees before paying your company.

If your client is a small company (meeting two of these three criteria: turnover under £10.2 million, balance sheet under £5.1 million, fewer than 50 employees), you are still responsible for determining your own status.

What puts you inside IR35?

HMRC looks at three main factors: control (does the client control how, when, and where you work?), substitution (could you send someone else?), and mutuality of obligation (is the client obliged to offer work and are you obliged to accept it?). If the answers point towards employment, you are inside IR35.

If caught inside IR35, your income is taxed as if you were an employee — higher tax and National Insurance. If you operate as a sole trader, IR35 does not apply. It only affects those working through limited companies or partnerships.

Pension Planning for Consultants

Self-employed consultants do not get employer pension contributions, so you need to sort this out yourself.

Sole traders can contribute to a personal pension and get tax relief on contributions up to 100% of your earnings or £60,000 (whichever is lower) in the 2025/26 tax year.

For a basic-rate taxpayer, a £100 pension contribution only costs you £80 because the pension provider claims back the 20% tax. Higher-rate taxpayers can claim additional relief through their tax return, making a £100 contribution effectively cost £60.

If your income fluctuates, you can carry forward unused annual allowance from the previous three tax years, allowing you to make a larger contribution in a good year.

Pension contributions are one of the most tax-efficient things a consultant can do, especially at higher income levels.

Working Out Your Tax Bill

Total up your consulting income
Subtract allowable expenses
The result is your taxable profit

Apply your £12,570 Personal Allowance, then:

20% on profits from £12,571 to £50,270
40% from £50,271 to £125,140
45% above £125,140

National Insurance:

Class 2: £3.45 per week (if profits above £12,570)
Class 4: 6% on profits between £12,570 and £50,270, then 2% above

Making Tax Digital

If your gross self-employed income exceeds £50,000, you will need to submit quarterly updates to HMRC through MTD-compatible software from April 2026. For income between £30,000 and £50,000, this applies from April 2027.

This is a good reason to get your digital record keeping sorted now rather than scrambling later.

Record Keeping

Keep records of all income and expenses for at least five years after the filing deadline. This includes:

Invoices issued to clients
Expense receipts
Bank and credit card statements
Mileage logs
Contracts with clients

Accounted keeps everything in one place. Penny, the AI bookkeeper, can reconcile your bank feed, categorise consulting income and expenses, and flag anything unusual — saving hours of admin each month.

Start Your Free Trial With Accounted

Your time is better spent advising clients than wrestling with spreadsheets. Accounted gives consultants a simple, MTD-ready bookkeeping system that takes minutes, not hours. Start your free trial today.

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