- A PLC can offer shares to the public but does not have to be listed.
- A PLC needs £50,000 of allotted capital, 25% paid up, before it trades.
- Almost every small UK business is better off as a private Ltd.
A public limited company is a UK company structure that is allowed to offer its shares to the public. It does not have to be listed on a stock exchange, but it must meet a minimum share capital requirement, appoint a company secretary, and obtain a trading certificate before it can start trading. Most UK businesses do not need one; a private limited company carries far lighter obligations.
If your company is growing and someone has mentioned “going PLC”, the honest answer is that you probably don’t need to. This guide explains what a public limited company actually is, why almost no reader of this page should become one, and what the requirements really involve for the small number who should. If you’d rather focus on getting your numbers right whatever your structure, Sleek’s accounting service pairs a qualified accountant with an AI audit trail so you can see every figure that’s filed on your behalf.
We won’t cover floating on the stock market, IPOs or AIM rules here. This is about the structure itself and the decision behind it.
What is a public limited company?
A public limited company (PLC) is a company whose shares can be offered for sale to the public. That single feature is what separates it from a private limited company, whose shares can only change hands privately.
Here is the point most definitions skip: being a PLC does not mean being listed. A company can be a PLC and never appear on the London Stock Exchange or AIM. “Public” refers to the legal freedom to sell shares to the public, not to any actual stock market listing.
You’ll recognise a PLC by the “plc” or “PLC” after its name, in the same way a private company ends in “Ltd”. In Wales, the Welsh equivalents “ccc” or “cwmni cyfyngedig cyhoeddus” are allowed. The plc meaning, then, is narrower than most people assume: it’s a permission, not a promise of scale.
Do you actually need one?
For the overwhelming majority of readers, no. If you run a growing business and you’re weighing this up, the plain answer is that a private limited company will almost certainly serve you better, at a fraction of the cost and admin.
A quick test. You should only seriously consider a PLC if you meet at least one of these three conditions:
- You intend to raise money by offering shares to the public, not just to a handful of private investors.
- You are preparing for a stock market listing or a public fundraising round in the near future.
- A customer, investor or sector expects PLC status as a condition of doing business with you.
If none of those apply, a PLC brings cost and obligation with nothing to show for it. Read the next section, then head to the cost of running a limited company and stay where you are.
PLC and Ltd: what genuinely changes?
The plc vs ltd question usually gets answered with a vague list of “advantages”. In practice, only a few concrete things change when you cross from private to public.
| Requirement | Private Ltd | Public limited company |
|---|---|---|
| Minimum allotted share capital | No minimum (often £1) | £50,000, with 25% paid up |
| Company secretary | Optional | Required, and must be qualified |
| Minimum directors | One | Two |
| Audit exemption | Available if it qualifies as small | Not available |
| Accounts filing deadline | Nine months after year end | Six months after year end |
Every row on that table adds either cost, time or both. None of it makes a small business more successful; it simply reflects the heavier scrutiny that comes with being able to sell shares to the public.
If your interest is really in issuing shares to private backers rather than the public, the mechanics sit with share capital and share premium, and you can do all of that comfortably inside a private Ltd.
What it takes to register a PLC?
Setting up a PLC follows the same Companies House route as any company, with extra conditions layered on top. The requirements are specific, so it’s worth listing them plainly.
- Share capital. The company must have allotted shares with a nominal value of at least £50,000, denominated in sterling (or the prescribed euro equivalent).
- Paid-up capital. At least 25% of that nominal value, a minimum of £12,500, must be paid up, together with the whole of any premium on each share.
- Directors. A minimum of two directors, rather than the one a private company needs.
- Company secretary. A qualified company secretary is legally required. Private companies dropped this requirement back in 2008, but PLCs did not.
- Memorandum and articles. The articles must state that the company is a public company.
On the company secretary point specifically, it’s worth reading appointing a company secretary before you commit, because the qualification bar is real and it’s an ongoing role, not a one-off form.
Why can’t a PLC trade the day it is incorporated?
A private company can start trading the moment its certificate of incorporation lands. A PLC cannot. It has to obtain a separate trading certificate from Companies House first.
The trading certificate (issued under section 761 of the Companies Act 2006) confirms that the company holds the minimum £50,000 of allotted capital with the required 25% paid up. Until it’s issued, the company can neither trade nor exercise any borrowing powers.
This isn’t a formality you can skip. Trading without a certificate is a criminal offence, and directors can be held personally liable for transactions entered into before it’s granted. It’s one of the practical reasons a PLC is a slower, heavier vehicle than most founders expect.
Accounts, audit and filing: the part people underestimate?
This is where the real cost of PLC status shows up, year after year. The gap between a PLC and a private Ltd is widest in the accounting obligations, and it never closes.
First, audit. A private company that qualifies as small can claim audit exemption. A public company cannot, full stop. Every PLC must have its accounts audited regardless of turnover, balance sheet or headcount, so the small-company thresholds (turnover up to £15 million, assets up to £7.5 million, 50 employees) simply don’t apply to you.
Second, deadlines. A PLC must file its annual accounts within six months of its financial year end, three months tighter than the nine months a private company gets. Miss it and the automatic penalties are steeper for public companies too.
Put together, an annual audit plus a compressed filing window is a standing commitment that rarely pays for itself below a genuine public-fundraising scale. If any of this is already keeping you up at night, a limited company accountant can carry the audit and filing load whichever structure you land on.
Who re-registers, and why?
Almost nobody starts life as a PLC. Most public companies begin as private Ltds and re-register later, and they do it for concrete reasons rather than prestige.
The businesses that genuinely make the move tend to share a circumstance: they need to raise capital at a scale that private investment can’t reach, usually as a precursor to listing. That means an established company with real revenue, a board that can support two directors and a qualified secretary, and advisers already in place.
If you’re a growing SME, the honest signal is size and intent. A five-to-twenty-five person business serving private clients does not need to be a PLC. A company preparing to sell shares to the public, with the governance to match, might. For the structures in between, it’s worth reading up on how many shareholders a company can have and setting up a holding company, both of which solve more real-world problems than converting to a PLC.
How to re-register an existing Ltd as a PLC?
Re-registration is a Companies House process, not a fresh incorporation. At a high level, an existing private company converts by taking a few defined steps.
- Pass a special resolution of the shareholders to re-register as a public company and change the name to end in “plc”.
- Amend the articles of association so they state the company is public.
- Meet the £50,000 allotted-capital test with at least 25% paid up, supported by a valuation of any non-cash consideration.
- Submit the application to Companies House with the required statements and recent balance sheet.
Because the capital conditions are satisfied during re-registration, a company converting this way generally does not need a separate trading certificate afterwards; the new certificate of incorporation in public form does the job. It’s still a project with legal and accounting input, not an afternoon’s admin.
What this means for your accounting?
Whether you stay a private Ltd or make the jump, the structure only matters if the numbers behind it are right. The heavier a company’s obligations get, the more a mistake costs, and PLC status raises that ceiling considerably.
Sleek pairs a qualified human accountant with AI that shows its working, so the audit, the filings and the deadlines are handled and you can see exactly what was done. That’s useful for any limited company; for a PLC facing a mandatory audit and a six-month filing window, it’s the difference between calm and chaos.
Ready to get your company accounts handled properly?
FAQs on PLC
Does a PLC have to be listed on the stock exchange?
No. A PLC is allowed to offer shares to the public, but it is not required to list on any exchange. Plenty of PLCs are unlisted and privately held. Listing is a separate decision that most PLCs never take.
How much share capital does a PLC need?
A PLC must have at least £50,000 of allotted share capital, denominated in sterling. At least 25% of the nominal value, so £12,500, must be paid up before it can trade, along with the whole of any premium on the shares.
Can a PLC have a single shareholder?
Yes. Since the Companies Act 2006 came fully into force, a public company can be formed and run with a single member. It must still record its single-member status in its register of members, and it still needs two directors and a qualified company secretary.
Does a PLC need a company secretary?
Yes, and unlike a private company, the requirement is not optional. A PLC must appoint a company secretary who is suitably qualified for the role, for example through a recognised professional body or relevant experience.
Can a PLC claim audit exemption?
No. The small-company audit exemption is not available to public companies under any circumstances. Every PLC must have its annual accounts audited, regardless of its turnover, balance sheet total or number of employees.
How long does re-registration from Ltd to PLC take?
Once the shareholder resolution is passed and the application, statements and balance sheet are ready, Companies House typically processes re-registration within a few working days. The longer part is the preparation: raising the capital, valuing any non-cash consideration and amending the articles.
Can a PLC convert back to a private limited company?
Yes. A PLC can re-register as a private limited company by special resolution, and it may need to if its allotted capital ever falls below the £50,000 authorised minimum. The process mirrors the conversion in the other direction.
Is "plc" the same as "public liability company"?
No, and this is a common mix-up. There is no such thing as a “public liability company” in UK law. “PLC” stands for public limited company. “Public liability” is a type of business insurance, which is an entirely different thing.
