Do I Need an Accountant or Solicitor to Start a UK Business?

Starting a business in the UK can be exciting stuff but it also opens up one big question quite early on, do you need an accountant or solicitor to start a UK business? The truthful answer is not always. In particular, many people are able to register or start up a business on their own (especially if the structure is simple). But the right professional guidance can help you save time, cut down on mistakes and avoid expensive issues later.

To put it in simpler words, you will not need both of them from day one, however most of the times you can benefit from either of them when the time is right. In other words, you may not need both from day one, but in many cases, you will benefit from one of them at the right stage. UK founders can register certain company types directly with Companies House, and sole traders can begin without incorporating a company. Companies House also sets out the main requirements for incorporating a company or LLP, while HMRC’s updated Making Tax Digital rules now affect many sole traders and landlords from 6 April 2026 depending on income thresholds.

Accountant or solicitor?

As a sole trader, you typically do not need a solicitor when setting up. You also aren’t required by law to have an accountant, though many small business owners enlist one to handle bookkeeping, tax returns and planning. If you’re setting up a limited company, it’s often possible to register the company online yourself via Companies House without appointing a solicitor. But you may decide to bring in an accountant for tax efficiency, and a solicitor when the legal complexity arises: shareholders agreements, partnership disputes, investor terms or regulated contracts. Registration of private limited companies (Companies House) can also be done online, as reported by GOV.UK guidance and the cost of paper submission is more than that through an online process.

So, the real answer is this:

• Simple setup = often no solicitor needed, accountant optional but helpful
• Growing or higher-risk setup = accountant strongly recommended, solicitor useful or essential

What an accountant actually helps with

An accountant for a UK business startup does far more than just “file tax”. A good accountant can help you choose between sole trader, partnership, LLP, or limited company. That matters because each structure affects tax, paperwork, liability, and how you take money from the business.

Here is where an accountant adds real value:

• choosing the most tax-efficient structure
• registering for HMRC obligations correctly
• setting up bookkeeping systems
• explaining allowable expenses
• helping with payroll, VAT, and Corporation Tax
• preparing for compliance deadlines
• advising on profit extraction, dividends, and salary

This is very likely to become relevant, particularly in 2026 because HMRC indicates that Making Tax Digital for Income Tax now applies from 6 April 2026 for sole traders and landlords with qualifying income over £50,000 (with a lower threshold expansion later). It means making use of digital data recorders and software, even for smaller companies. Get details on Company Registration Service.

When an accountant is especially useful

You should strongly consider an accountant if:

• you are unsure whether to operate as a sole trader or limited company
• you expect fast growth
• you plan to hire staff
• you need VAT advice
• you want clean books for a future loan or investor
• you are an overseas founder entering the UK market

What a solicitor helps with

A solicitor for business startup UK deals with the legal side rather than the tax side. You usually do not need a solicitor just to register a standard small company. However, legal advice becomes very valuable when the business involves risk, ownership complexity, contracts, or disputes.

A solicitor can help with:

• shareholder agreements
• founders’ rights and responsibilities
• partnership agreements
• commercial contracts
• lease review for office or retail premises
• intellectual property protection
• terms and conditions
• privacy policies and compliance documents
• business purchase agreements
• dispute prevention and risk control

So, if your launch is straightforward, a solicitor may not be necessary at the start. But if two or more founders are involved, or there is money, IP, or ownership on the table, legal support can prevent major issues later. Looking for a Company Registration in UK?

Accountant vs solicitor: what is the difference?

Task	Accountant	Solicitor
Advise on tax structure	Yes	No
Help with bookkeeping and returns	Yes	No
Draft shareholder agreement	No	Yes
Review legal contracts	No	Yes
Set up payroll and tax systems	Yes	No
Handle business disputes	No	Yes
Advise on VAT and HMRC compliance	Yes	No
Protect legal ownership interests	Sometimes indirectly	Yes

This is why many startups do not choose one instead of the other forever. They choose the right one for the right task.

Can you start a UK business without either of them?

Yes, many people do. A founder can register a private limited company online, follow Companies House rules, keep proper records, and then manage tax compliance independently. A sole trader can start trading and then meet HMRC obligations without using either professional at the very beginning. GOV.UK’s business guidance makes clear that founders can use direct government systems for company registration and ongoing responsibilities, and Companies House publishes the main incorporation requirements openly.

However, “possible” does not always mean “wise”.

A do-it-yourself setup may work if:

• the business is small and low-risk
• you are the only owner
• there are no investors
• there is no special licensing issue
• your contracts are simple
• your turnover is low in the early stage

A DIY approach becomes risky if:

• multiple founders are involved
• you are unclear on ownership shares
• you want to issue shares later
• you are entering contracts quickly
• you need regulated permissions
• you are not confident with tax and deadlines

Best choice by business type

If you are a sole trader

You usually do not need a solicitor. An accountant is optional, but very helpful once income grows, expenses become harder to track, or HMRC reporting becomes more technical.

If you are forming a limited company

You can register the company yourself, but an accountant is often worth having from the start. A solicitor may only be needed if there are co-founders, investment terms, commercial leases, or legal agreements.

If you are starting with a partner

You should seriously consider both. An accountant helps with tax structure, while a solicitor protects the relationship with a written agreement. Many startups fail not because the idea is weak, but because ownership and duties were never written down proper.

If you are an overseas entrepreneur

An accountant can help with UK tax, company structure, and HMRC registration. A solicitor may help with legal presence, contracts, and cross-border documents, especially if the ownership structure is not simple. GOV.UK also publishes separate guidance for overseas companies that establish a UK presence. Get details on Company Registration in England.

Typical cost comparison

Service	Typical use at startup	Estimated cost range
DIY company registration	Basic limited company formation	£100 online
Paper company registration	Manual filing route	£124
Accountant consultation	Structure and tax advice	£100–£400+
Ongoing accountant support	Bookkeeping, returns, payroll	£50–£300+ per month
Solicitor consultation	Legal review or agreements	£150–£500+ per hour
Shareholder/partnership agreement	Founder protection	£300–£1,500+

Companies House states that online registration for a private company limited by shares costs £100, while a paper filing costs £124. Professional fees vary widely by complexity and provider.

Common mistakes founders make without advice

Many new founders delay support because they want to save money. Fair enough. Still, these mistakes often cost more later:

• choosing the wrong structure
• mixing personal and business money
• missing HMRC deadlines
• failing to document founder ownership
• using weak contract templates
• not preparing for digital tax record requirements
• assuming online registration covers all legal and tax setup

That last point matters a lot. Registering a company is only one step. Running it correctly is another job entirely. Looking for a Company Registration in London?

So, which one should you hire first?

For most small startups, the first professional is usually an accountant. Why? Because tax setup, bookkeeping, and compliance affect almost every business from day one. A solicitor often comes in when legal complexity appears.

A practical rule looks like this:

• Hire an accountant first if your main worry is tax, structure, payroll, VAT, or filing
• Hire a solicitor first if your main worry is contracts, co-founders, shares, leases, or legal risk
• Use both if the business has multiple owners, external investment, or complicated operations

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Setting Your Business Up the Right Way

So do you need to have an accountant or solicitor when you start your UK business? You do not need either one to get started, in many cases legally. But that does not mean you should ignore the pros. For a straightforward sole trader set up you might set-up on your own and bolt an accountant on later. An accountant tends to be one of the best initial hires for a limited company. For any issues regarding partnership, investors, contracts or ownerships a solicitor can save you from serious future problems..

The cheapest startup decision is not always the best one. This is the one that makes sure your business stays in compliance, organized and able to scale.

FAQs: Do I need an accountant or solicitor to start a UK business?