Is starting a business under 18 legal?

Dreaming of starting your own business before 18? In the UK, you can do just that. Whether you want to launch a fashion line or a tech startup, you can start earning at any age – and even become a company director at 16.

There are some restrictions around banking, contracts, and finance that affect under-18s. Most will need a parent or guardian involved at certain stages.

But none of these are dealbreakers – with the right setup and a bit of adult support, young entrepreneurs can trade legally and build exciting businesses.

This guide covers how to start a business under 18 – from the legal rules and registering as a sole trader, to banking, funding, and support programmes for young founders in the UK. It’s ideal for teenagers, parents and guardians, or anyone supporting young founders.

Is it legal to start a business under 18?

Absolutely. There’s no minimum age to start a business in the UK. If you want to sell products, offer services, or earn money from something you’re good at – you can do that at any age.

Most young entrepreneurs start as sole traders, which has no age limit. It just means you’re trading as yourself, rather than setting up a formal company.

From 16, you can act as a company director, which is the earliest age you can practically register and run a limited company yourself, since every company needs at least one director. A parent or guardian may be able to help with the setup – particularly around tax registration, banking, and any contracts that need an adult’s involvement.

• How to write a business plan as a startup in 2026
• Support for entrepreneurs: Here’s where to start
• Business degree or business mindset – what matters most?

Age rules for directors and shareholders

Every limited company needs at least one director. A director is the person legally in charge – they make decisions, manage the company’s affairs, and take responsibility for making sure it meets its legal obligations.

To become a director, you need to be at least 16. If you’re 16 or over, you can set up a limited company, act as its director, and hold shares from day one. If you’re under 16, you can still own shares in a limited company, for which there’s no minimum age. However, you won’t be able to act as director.

A parent or guardian may also join as a co-director to help with tasks such as signing contracts and opening a business bank account, which generally require someone over 18.

Is running a business and school compatible? Absolutely, if you’re smart about how you use your time and don’t eat into your studies. If you’re under 16, you must be in full-time education, and your business shouldn’t interfere with that. In England, 16- and 17-year-olds must also continue in some form of education or training. This doesn’t legally stop you from running a business, and many young entrepreneurs balance a venture alongside college or sixth form.

Choosing a business structure: Sole trader vs ltd company

Wondering how to start a business under 18? The journey begins with understanding your options and setting up as a sole trader or limited company.

Sole trader

As a sole trader, you’re just you – running a business as an individual, without setting up a separate company. There’s no minimum age.

The main thing you do need to do is register with HMRC for Self Assessment. This is required once you earn more than £1,000 in a tax year, but you can sign up sooner if you’d rather get it sorted early.

Once you’re registered, you keep track of what you earn and spend and file a tax return once a year.

Here’s how it works:

• There’s no separation between you and the business – any money it makes (or owes) is yours
• It’s free and quick to set up
• You report your income to HMRC through a tax return each year
• You’re personally liable for any debts the business takes on, which includes money owed to suppliers, refunds to customers, or unpaid tax

Limited company

If you’re 16 or over, you can form a limited company, act as a director, and hold shares in your company. A limited company is registered with Companies House and is legally separate from you. It’s its own “thing” in the eyes of the law. That’s one of the main differences from being a sole trader.

Here’s what it means:

• The company has its own separate legal identity – it’s considered separate from you
• Personal savings and belongings can be protected if the business runs into debt – this is because you are normally only liable for the amount you agree to pay for your shares
• The company will normally have its own bank account, separate from yours
• The company will also have its own tax bill and its own legal responsibilities
• You’ll need to file annual accounts with Companies House and a Company Tax Return with HMRC, among other submissions. These include a confirmation statement (an annual check that your company details are up to date), VAT returns if you’re VAT-registered, and notifying Companies House of any changes to your company’s details such as new directors or a change of address.
• There’s more paperwork than being a sole trader, but also potentially more protection

If you’re 16 or 17, you can be the sole director, but it may be worth asking whether an adult – like a parent or guardian – can serve as a second director. They can help open the business bank account, sign contracts, and ensure paperwork is filed on time. They would have the same legal responsibilities as you or any other director.

Choosing a business structure – sole trader vs limited company

Here’s a quick comparison of limited companies and sole traders to help you see the differences at a glance.

Setting up a business bank account for under-18 entrepreneurs

If you’re setting up a limited company, a dedicated business bank account is strongly recommended. This will help you keep your and your business’ finances separate.

This is the first complication of running a limited company below the age of 18, as most UK banks require business account holders to be at least 18.

What you can consider

If you can’t open a business bank account yet, here are some possible solutions:

• Use a separate personal account – this won’t work for a limited company, which needs its own account, but it’s fine for sole traders who want to keep personal and business money apart
• Bring in an adult co-director – a parent or guardian can open and run the account on your behalf until you turn 18, then hand it over to you
• Try fintech and digital banking providers – some newer providers, such as Monzo and Revolut, are more flexible with age requirements, though it depends on the provider and your setup

Contracts and legal obligations as a young entrepreneur

When you’re under 18, there are two areas where your age really matters: any contracts you sign and, if you’re running a limited company, your legal responsibilities as a director. Both are manageable with the right support.

Contracts and what you can (and can’t) sign

If you’re under 18 in England and Wales, you can sign contracts – which are formal, legally binding agreements – but they can work differently than they do for adults.

Under UK law, minors can cancel most agreements they enter into at any time, but the other party doesn’t have the same option. That means they sometimes can’t walk away from the deal when you can. Because of this, most businesses would rather deal with an adult.

In practice, this means:

• Leases, finance agreements, and supplier deals will usually need a parent or guardian to sign on your behalf
• Most companies will want an adult involved for anything expensive or long-term
• Other formal agreements – like non-disclosure agreements (NDAs), which are promises to keep certain information private – often work the same way

If a contract is complex, involves a lot of money, or if anyone involved is unsure, getting legal advice is a smart move.

Director duties under UK law

As a company director, you have certain duties and responsibilities under the Companies Act 2006 – and these apply regardless of your age. Examples include:

• Act in the company’s best interests – every decision should be made for the good of the company, not for personal benefit
• Keep proper records – properly track all money related to your business and keep accurate, up-to-date records
• File annual accounts – a financial report showing how much the company earned, what it spent, what it owns, and what it owes, filed with Companies House at the end of each financial year
• File a confirmation statement – a yearly check that the company’s details on the public register (directors, address, shareholders) are still correct
• File a Company Tax Return – a report filed with HMRC showing the company’s profits and how much tax it owes

These responsibilities apply to everyone, no matter their age, and apply to every director in the company. If a parent or guardian joins as a co-director, that includes them.

Where a director fails to meet their responsibilities, they can face penalties such as fines and prosecution, and in more extreme cases, they can be disqualified from acting as a director for up to 15 years. Using a simple system to track deadlines and paperwork can make these responsibilities much easier to manage. If you have any confusion or doubt whatsoever, receiving professional advice can help you comply with the law.

Successful businesses started by young UK entrepreneurs

Curious about whether teens can build successful businesses? Check out these incredible examples of young entrepreneurs who turned dreams into reality.

• Ben Towers started getting paid for web design projects at 11. By 16, he was running a digital agency with 15 employees. He completed a merger at 18, and was recently awarded an MBE for services to the startup community. He had this advice for aspiring entrepreneurs: “You need to understand that there are various challenges to starting up, but as a young business owner, your job is to overcome these and prove that your business acumen and abilities can match that of entrepreneurs older than you.”
• Henry Patterson began selling products online at 9, wrote a children’s book, and turned it into the lifestyle brand Not Before Tea – stocked in over 60 UK stores before he turned 16. He published his own book called “Young and Mighty“, talking about his journey and how young people can turn their passions into more than a hobby.
• Rose Dyson launched Pura Cosmetics at 15 with just £25, after entering a local enterprise competition and spotting a gap in the market for ethical lip care. Her advice for young people: “I think everyone has their own path and it doesn’t necessarily mean a lovely sheet of grades… you can succeed and show success in so many different ways.”
• Jenk Oz became one of the UK’s youngest CEOs at 12, running a publishing, consulting, and production company with a global reach. Jenk had the perfect advice for why starting a business young is an advantage: “No one doubts your abilities because they have no expectations from you if you’re a kid. Therefore, being young is not an obstacle, it’s an opportunity to try, fail, learn and try again.”

They all started with what they had, asked for help where they needed it, and learned the rest as they went.

Funding options and financial support for young entrepreneurs

Loans, credit cards, and overdrafts are generally off the table if you’re under 18. But that doesn’t mean you can’t fund your venture.

Plenty of young entrepreneurs get going with almost nothing – and there’s more external support available than you might think.

Low-cost ways to get started

You don’t always need money to make money. If you’ve got a computer and internet access, service-based ideas like graphic design, tutoring, social media management, or web development can be started with almost zero upfront cost. A few ways to keep costs down in the early stages:

• Use free tools like Canva, Google Workspace, and social media to build your brand before investing in paid software
• Test your idea with friends, family, or local communities before committing money to a website or stock
• If you’re selling products, consider made-to-order or pre-orders, so you’re not spending money until customers have already paid
• Ask for testimonials and reviews early on – when you’re young and unknown, social proof goes a long way

Programmes offering funding

Feeling confident and ambitious? There’s plenty of help available. Several excellent UK programmes provide structured funding and support specifically for young entrepreneurs:

• Young Enterprise – runs the 10x Challenge, giving students aged 11–19 four weeks to build a business from a £10 pledge
• The King’s Trust – their Enterprise Programme offers start-up grants of up to £5,000 and loans of up to £25,000 for those aged 18–30, plus mentoring and workshops
• UnLtd – provides awards of up to £8,000 for social entrepreneurs starting a venture with a community-focused mission
• Go London – Young Entrepreneurs Fund offers grants of up to £15,000 for 16- to 24-year-olds in sports and physical activity
• Hatch Enterprise – runs programmes for young founders, with fully funded options, bursaries, and competitive grant opportunities
• Launch It – supports 18- to 30-year-olds with workspaces, training, mentorship, and funding

Youth enterprise programmes and resources

As a young business owner, asking for help is key to growing your business. Luckily, there’s a growing network of support designed specifically for young founders across the UK – and most are completely free.

Enterprise education programmes

Young Enterprise runs financial and enterprise education programmes, including the Company Programme – where students set up and run a real business over an academic year. Its Start-Up Programme supports university students for up to 12 months.

Ultra Education works with young people aged 7–18, running entrepreneurship clubs, workshops, and events. Its programmes are particularly focused on supporting children from underrepresented communities. Besides those, you can also find many mentoring programmes and free training:

• Launch It offers a free two-year programme including training, mentoring, and funding, with enterprise centres in London, Kent, and Scotland
• Hatch Enterprise runs bespoke programmes for young founders, with bursaries covering up to 100% of costs and competitive grants for graduates
• Barclays Eagle Labs provides business support services open to non-Barclays customers
• Innovate UK Young Innovators offers financial support, mentoring, and access to a network of young innovators – particularly for ideas in sustainability, tech, and social impact

Make sure you check what your school, college, or university offers too. You might find business competitions and challenges, mentoring, or even sponsorships.

Step-by-step guide: launching your business under 18

Once you’ve got a sense of the rules and the support available, it’s time to get the ball rolling.

The process looks slightly different depending on your age and chosen structure, but these core steps apply to virtually all young entrepreneurs:

1. Validate your idea

Before you invest time or money, test whether there’s demand for your product and business.

Talk to potential customers, research your competitors, and consider starting with a small pilot or pre-order. Listen closely to feedback – it helps you adapt and fine-tune your products.

2. Choose your business structure

Decide whether to operate as a sole trader or limited company.

As a sole trader, you and the business are the same legal entity – it’s simpler to run, but you’re personally liable for any debts. A limited company is a separate legal entity – this means a few things, including that your personal finances are generally protected. However, there’s more admin involved.

If you’re under 16, you’ll generally start as a sole trader. From 16, you also have the option of registering a limited company, as you’ll now be old enough to act as director.

3. Register your business

If you’re a sole trader, register for Self Assessment with HMRC. You need to do this by 5 October, after the end of the tax year you started trading – but you can register earlier if you’d rather get it sorted.

For example, if your trading income passes £1,000 during the 2026/27 tax year (which runs from 6 April 2026 to 5 April 2027), you’d need to register by 5 October 2027 at the latest. A parent or guardian may need to help with the registration if you’re under 16.

If you’re setting up a limited company, register with Companies House. You’ll need to provide details like the company name, registered office address, and director and shareholder information.

4. Set up your finances

If you’re a sole trader, open a separate account for your business income – even if it’s a second personal account to begin with. You’re not legally required to, but it makes tracking income and expenses much easier come tax time.

If you’re forming a limited company, it’s strongly recommended to open a dedicated business bank account.

Most banks require the account holder to be at least 18, so an adult co-director may need to open and manage the account on the company’s behalf.

5. Understand your obligations

Nobody starts a business because they’re excited about tax returns – but getting the basics right early will save you a lot of hassle later.

As a sole trader, you’ll need to file a Self Assessment tax return each year and keep records of all your income and expenses.

As a limited company director, your obligations are broader. For example, you’ll need to file annual accounts and a confirmation statement with Companies House, file a Company Tax Return with HMRC, and keep proper accounting records throughout the year, among other responsibilities.

If you’re not sure where to start, an accountant, solicitor, or company secretarial professional can walk you through it – even a single session can set you up with a useful system.

6. Seek support

The support out there for young founders right now is genuinely impressive – free mentoring, funded programmes, startup grants, national competitions.

Don’t be afraid to ask for help. Tap into everything you can. The earlier you build that network, the further you’ll go.

Ready to get started?

You can absolutely start a business in the UK if you’re under 18. Many start their business journey as sole traders and form a company when the time is right.

The main challenges are banking restrictions, contract limitations, and the need for adult support in certain areas. With the right structure and a bit of guidance, though, none of them needs to hold you back.

If you’re ready to take the first step, company formation through 1st Formations gets you registered with Companies House and sorts the paperwork from day one. Our company secretarial services can help to handle the compliance side, so you can focus on running your business.