AI agents for business finance: what they can and can't do
What AI agents can do in bookkeeping, close, collections and compliance today, where a person must stay in charge, and how to judge a product.
The short answer
A sole trader and the business are legally the same person, with unlimited liability for its debts and Income Tax plus National Insurance on profits through Self Assessment. A limited company is a separate legal person: owners' liability is limited to their investment, the company pays Corporation Tax (19% to 25% as at October 2026), and directors are taxed on what they take out. Before either, check that your visa lets you do the work.
Nigerians in the UK start businesses of every kind: catering, hair, care, consulting, logistics, food imports. The first legal choice is usually between working as a sole trader and setting up a limited company. GOV.UK's guide to business structures sets out the differences; this article applies them to the questions diaspora founders most often ask.
Check the visa first
The structure does not change what your immigration permission allows. GOV.UK says Student visa holders cannot be self-employed, which rules out working as a sole trader. Skilled Worker visa holders may work up to 20 hours a week in their own business alongside their sponsored job, on conditions, and GOV.UK says that can include working as a sole trader. Founders on other routes should check their own visa conditions; see UK companies and Nigerian visas.
The differences, side by side
| Sole trader | Limited company | |
|---|---|---|
| Legal status | You and the business are the same | A separate legal person |
| Liability | Unlimited: you are personally responsible for business debts | Limited to the value of your investment |
| Tax on profits | Income Tax through Self Assessment, plus National Insurance | Corporation Tax paid by the company |
| Taking money out | Profits are yours | Salary, dividends or a directors' loan, each taxed its own way |
| Setting up | Register for Self Assessment if you earn more than £1,000 in a tax year | Register with Companies House before trading; £100 online as at October 2026 |
| Ongoing paperwork | Records from day one and a tax return | Annual accounts, company tax return, confirmation statement |
| Name | Your own name or a trading name | Must follow company naming rules |
Both structures can take on employees and both must register for VAT if they meet the requirements, GOV.UK says.
The tax numbers, as at October 2026
For a sole trader, GOV.UK lists Class 4 National Insurance at 6% on profits between £12,570 and £50,270 and 2% above, for 2026 to 2027, with Class 2 contributions now voluntary at £3.65 a week. Income Tax is charged on profits at the rates on GOV.UK.
For a company, GOV.UK lists Corporation Tax at 19% on profits of £50,000 or less and 25% on profits over £250,000, with marginal relief in between. Directors then pay Income Tax and National Insurance depending on how they take money out.
A worked example
Example only, simplified: a business makes £30,000 profit in a year.
- As a sole trader, Class 4 National Insurance would be 6% of (£30,000 minus £12,570), which is 6% of £17,430, or £1,045.80. Income Tax would be due on top.
- As a limited company paying no salary, Corporation Tax at 19% would be £5,700, leaving £24,300 in the company. Any money the owner then takes out is taxed again as salary or dividends.
The example shows why the comparison is not simple: the company's bill comes in two stages, and the result depends on how much you draw and how. An accountant can model your own figures; our guide to paying yourself as a director explains the options.
Starting small and switching later
Many founders begin as sole traders to test an idea and form a company once the business is steady. That path is open: nothing stops a sole trader registering a company later. When you do, the company becomes a new legal person, so it needs its own bank account, its own contracts and invoices in its own name, and its own registration for Corporation Tax. Customers who paid you personally will need the new details.
Records from day one
GOV.UK says sole traders keep records from the day they start trading. Keep every invoice, receipt and bank statement, note what each payment was for, and keep income from Nigeria-based clients clearly labelled. Good records make the later switch easier, because an accountant can see what the business earned and spent before the company existed.
Points Nigerian founders weigh
- Contracts and clients. Some larger UK clients prefer to contract with a company.
- Banking. A company needs its own business account, which can be harder to open, especially with links abroad.
- Privacy. A company's registered office and officers appear on the public register.
- Moving back. A company can keep trading after you return to Nigeria, but raises tax residence questions; see keeping a UK company after moving to Nigeria.
- Business in Nigeria. If the trade is mostly in Nigeria, compare the Nigerian options: business name or limited company in Nigeria.
Where Pryme fits
Whichever structure you choose, separate business money from personal money. A Pryme Business Account holds NGN, USD, GBP and EUR with local account details for each, and invoicing helps you bill customers in the currency they pay in. Outside Nigeria, Pryme's activities are carried out through regulated partners. This page is information, not tax advice.
Questions people ask
Should I be a sole trader or limited company in the UK?
It depends on liability, how much profit you expect, how you will take money out and what clients want. Check first that your visa allows the work.
Can I be a sole trader on a Student visa?
No. GOV.UK says Student visa holders cannot be self-employed.
What is the Corporation Tax rate in 2026?
As at October 2026, GOV.UK lists 19% on profits of £50,000 or less and 25% over £250,000, with marginal relief in between.
When must a sole trader register for Self Assessment?
GOV.UK says if you earn more than £1,000 from self-employment in a tax year, which runs from 6 April to 5 April.
Sources
- GOV.UK: Set up a business, legal structures · accessed Oct 2026
- GOV.UK: National Insurance, how much you pay · accessed Oct 2026
- GOV.UK: Corporation Tax rates and reliefs (updated 23 Oct 2026) · accessed Oct 2026
- GOV.UK: Set up a limited company, register your company · accessed Oct 2026
- GOV.UK: Student visa · accessed Oct 2026
- GOV.UK: Skilled Worker visa, taking a second job · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.