What Makes a Consultant Different from a Typical Small Business?

You are not running a café or a building firm. You sell expertise. Your business model is built on your time, your reputation, and your ability to win contracts. That means your accounting needs are different too.

Most small business accountants are generalists. They handle VAT returns and year-end accounts for shops, trades, and local services. That works fine for a plumber turning over £60,000. It does not work for a management consultant billing £150,000 through a limited company with three concurrent clients, two of whom want you inside IR35.

A specialist accountant for consultants understands the specific tax and compliance challenges of consultancy work. They know the IR35 rules inside out. They structure your director pay to minimise tax. They handle the paperwork for contract reviews, expense claims, and cross-border work. They do not just file your accounts. They help you keep more of what you earn.

This article covers exactly what a consultant should expect from their accountant, the common pitfalls to avoid, and how to choose the right firm.

The Core Tax Issues for UK Consultants

IR35 and Off-Payroll Working

IR35 is the single biggest tax risk for a consultant operating through a limited company. It determines whether you pay tax like a business (dividends and low salary) or like an employee (PAYE and NI on everything).

If you work through an intermediary like your own limited company but would be classed as an employee if you were engaged directly, IR35 applies. The rules shifted significantly in April 2021 for medium and large clients. They now decide your IR35 status and issue a Status Determination Statement (SDS). If they get it wrong, HMRC can come after them for the unpaid tax. But if you are inside IR35, your limited company receives deemed employment income. You lose the ability to take dividends from that contract income. Your tax bill goes up sharply.

A general accountant might not spot a borderline IR35 case. A specialist accountant for consultants will. They can help you assess contract terms, working practices, and whether your client's determination is correct. They will also advise on what to do if you disagree with the determination.

If you are a contractor operating outside IR35, your accountant should also ensure your contract and working practices support that status. HMRC can and does investigate. Having the right paperwork and a clear paper trail is essential.

Director Pay: Salary vs Dividends

Most consultants pay themselves a small salary and take the rest as dividends. The standard approach is a salary of £12,570 per year (matching the personal allowance and primary NI threshold) and dividends up to the basic rate band. This avoids employer NI, employee NI, and higher rate income tax on the salary portion.

But there are nuances. If you have multiple directors in the company, the Employment Allowance of £10,500 can cover the employer NI on salaries up to £12,570 each. That changes the maths. A specialist accountant will run the numbers for your specific situation rather than applying a one-size-fits-all rule.

Dividends are taxed at 8.75% (basic rate), 33.75% (higher rate), and 39.35% (additional rate) in 2025/26. The annual dividend allowance is just £500. Your accountant should project your total income for the year and advise on the most tax-efficient dividend strategy.

Expenses and Travel

Consultants often incur significant travel costs. Visiting client sites, attending conferences, meeting prospects. HMRC allows you to claim travel and subsistence expenses for temporary workplaces. The key word is temporary. If you work at a client site for more than 24 months, it becomes a permanent workplace and travel costs are no longer deductible.

A specialist accountant tracks this. They know the 24-month rule and will flag it before you hit the limit. They also understand what counts as a valid expense for a consultant: professional subscriptions, training courses, books, software licences, home office costs, and business entertainment.

Home office costs are particularly common for consultants. You can claim either the simplified flat rate of £6 per week (no receipts needed) or a proportion of your actual household costs based on the number of rooms used and the time spent working from home. A good accountant will work out which method gives you the better deduction.

VAT Registration and Flat Rate Scheme

Once your turnover hits £90,000 in any rolling 12-month period, you must register for VAT. Many consultants register voluntarily before that threshold to reclaim VAT on their own costs.

The Flat Rate Scheme can be attractive for consultants. The flat rate percentage for management consultancy is 14.5% (though this varies by sector). You charge your clients 20% VAT but pay HMRC a lower fixed percentage. The difference is yours to keep. But the limited cost trader rules mean if you spend less than 2% of your turnover on relevant goods (or less than £1,000 per year), you must use the 16.5% flat rate, which makes the scheme much less beneficial.

Your accountant should model both scenarios: standard VAT accounting versus flat rate. They should also handle your VAT returns quarterly through MTD-compatible software like Xero, FreeAgent, or QuickBooks.

Corporation Tax Planning

Your limited company pays corporation tax on its profits. The rate in 2025/26 is 19% on profits up to £50,000, 25% on profits above £250,000, with marginal relief in between. If your profits fall in the marginal relief band (£50,000 to £250,000), the effective rate rises gradually from 19% to 25%.

A specialist accountant will help you plan. They might recommend timing purchases (like new equipment or software licences) to reduce profits in a high-tax year. They might advise on pension contributions, which are deductible for the company and tax-efficient for you personally. They might also help with R&D tax credits if your consultancy develops new methodologies, software tools, or processes.

What to Look for in an Accountant for Consultants

Not all accountants are equal. Here are the specific things to check before you engage a firm.

IR35 Knowledge

Ask direct questions. How do you handle inside IR35 contracts? What is the process for a contract review? Have you dealt with HMRC IR35 enquiries before? If the accountant hesitates or gives vague answers, move on.

A good accountant will also know about the off-payroll working rules for the public sector (which have been in place since 2017) and the private sector (since 2021). They should be able to explain the difference between a Status Determination Statement and a contract review.

Software and Systems

Your accountant should use modern cloud-based accounting software. Xero and FreeAgent are the two most common for consultants. QuickBooks is also popular. The accountant should integrate with your bank feed, automate invoice processing, and give you real-time visibility of your tax position.

If they ask you to send paper receipts or spreadsheets every month, find someone else. You need an accountant who works in real time, not one who batch-processes everything once a year.

Proactive Advice, Not Just Compliance

Filing your accounts and tax returns is the minimum. A good accountant for consultants will proactively advise on tax planning, cash flow, and business structure. They will tell you about changes to the tax rules before they happen, not after. They will flag when you are approaching the VAT threshold, when your dividend strategy needs adjusting, or when it makes sense to incorporate if you are still a sole trader.

Ask potential accountants: "What is the last piece of proactive advice you gave to a consultant client?" If they cannot answer, they are a compliance firm, not a strategic partner.

Industry Experience

Consultancy covers many sub-sectors: management consulting, IT consulting, engineering consulting, marketing consulting, financial consulting. Each has different expense patterns, contract structures, and tax issues. An accountant who works with IT contractors in Manchester may not be the best fit for a management consultant in Bristol. Look for someone who has worked with consultants in your specific field.

At Holloway Davies, our ICAEW qualified team works with consultants across every sector. We see the patterns and know the pitfalls.

Common Mistakes Consultants Make with Their Accounts

Here are the most frequent errors we see. Avoid them.

  • Mixing personal and business expenses. It is messy, it risks HMRC penalties, and it makes bookkeeping harder. Keep a separate business bank account and use it for everything business-related.
  • Ignoring the 24-month rule. Travel to a client site that lasts more than 24 months becomes a permanent workplace. Your travel costs stop being deductible. Your accountant should track this for you.
  • Taking too much dividend without planning. If your total income pushes you into higher rate tax, the dividend tax rate jumps from 8.75% to 33.75%. A little planning can save thousands.
  • Failing to register for VAT on time. If your turnover crosses £90,000 and you do not register within 30 days, HMRC can charge penalties. Your accountant should monitor your rolling turnover.
  • Not reviewing contracts for IR35. A contract that looks outside IR35 on paper might still be caught if your working practices suggest employment. A proper review covers both.

When to Switch to a Specialist Accountant

If your current accountant is a generalist and you are starting to earn more, take on larger contracts, or work with clients who use the off-payroll rules, it is time to switch. The same applies if you are about to incorporate for the first time. The incorporation process has tax implications that a generalist may not handle well.

Switching accountants is straightforward. Your new firm handles the professional clearance letter to your old one, requests the necessary files, and takes over from there. It usually takes two to four weeks.

If you are a sole trader or partnership considering incorporation, read our guide on incorporation and structure first. It covers the tax implications, the costs, and the timing.

How Much Does a Specialist Accountant Cost?

Fees vary by location, complexity, and the level of service. For a consultant with a limited company, expect to pay between £100 and £250 per month for a full-service package. That typically includes:

  • Unlimited advice on tax, IR35, and expenses
  • Quarterly management accounts and VAT returns
  • Year-end accounts and corporation tax return (CT600)
  • Personal tax return (SA100)
  • Payroll processing (PAYE and RTI)
  • Software licences for Xero or FreeAgent

Some firms charge extra for contract reviews, HMRC enquiry insurance, or specialist advice like R&D tax credits. Ask for a full breakdown before you sign up.

At Holloway Davies, we offer transparent pricing with no hidden extras. Contact us for a tailored quote based on your specific situation.

Final Thoughts

Choosing the right accountant is one of the most important decisions you will make as a consultant. A generalist will keep you compliant. A specialist accountant for consultants will keep you compliant and help you pay less tax, avoid IR35 traps, and plan for growth.

If your turnover crossed the VAT threshold in the last 30 days, register inside the 30-day window. If you are approaching the 24-month mark at a client site, start planning your travel expense strategy now. And if you are not getting proactive advice from your current accountant, it is time to look for one who will.

For a full overview of our services for consultants and contractors, visit our services page.