How many shares should I issue when incorporating a UK startup?
By SuLe · Updated 2 July 2026
There is no legally right number — UK law lets you incorporate with a single share — but founders commonly issue a round number like 10,000 or 100,000 shares at a small nominal value. A larger share count makes percentage splits, option grants and investor maths far easier, without changing what the company is worth.
Key facts
- A private limited company needs at least one shareholder, so the legal minimum is one share (Companies Act 2006).
- Founders commonly incorporate with a round number: 100, 1,000, 10,000 or 100,000 shares.
- Every share has a fixed nominal value — £1, £0.01, £0.001 or £0.0001 all work — and cannot be issued for less than it.
- With 100,000 shares in issue, 1% of the company is a clean 1,000 shares.
- Share count does not affect value: 100 shares or 1,000,000, the pie is the same size.
Is there a minimum or maximum number of shares?
The minimum is one: a private limited company needs at least one shareholder, and that shareholder needs at least one share. There is no meaningful maximum — the Companies Act 2006 abolished the old requirement for an "authorised share capital" cap, though a company can still choose to impose one in its articles.
Every share must carry a fixed nominal value, and shares cannot be issued for less than that value. Any amount is lawful — £1, £0.01, £0.001 or £0.0001 — which is what makes large counts affordable.
Why do founders issue 10,000 or 100,000 shares rather than 100?
Granularity. Founders commonly incorporate with a round number — 100, 1,000, 10,000 or 100,000 shares — and the larger counts make future percentage splits, option grants and investor maths far easier.
UK company law does not allow fractional shares: you cannot hold half a share. With 100 shares in issue, 1% is a single share and nothing smaller exists — a 0.5% advisor promise is literally impossible to keep. With 100,000 shares, 0.5% is a clean 500 shares.
| Setup at incorporation | Total nominal capital | 1% of the company | Granularity |
|---|---|---|---|
| 100 shares of £1 | £100 | 1 share | Coarse — nothing below 1% exists |
| 10,000 shares of £0.01 | £100 | 100 shares | Good |
| 100,000 shares of £0.001 | £100 | 1,000 shares | Excellent |
| 1,000,000 shares of £0.0001 | £100 | 10,000 shares | Excellent |
How do share count and nominal value work together?
They are two halves of one decision: count multiplied by nominal value is the capital founders must pay in. 100,000 shares at £0.001 is £100; the same count at £1 nominal would be £100,000.
A tiny nominal value makes a big count affordable, and the big count buys flexibility. The pairing is the point — pick them together, not separately.
The number of shares says nothing about value. Issuing yourselves more shares at incorporation does not make the company worth more; it just cuts the same pie into more, thinner slices.
What if I picked the wrong number?
Nothing is fatal. You can subdivide later — splitting each £1 share into 1,000 shares of £0.001, say — by shareholder resolution with Companies House filings, or simply issue more shares as the company grows.
But every fix adds resolutions, filings and cap-table history for due diligence to crawl through, usually mid-round when time is shortest. Ten minutes of thought at incorporation is the cheap version.
Worked example
Ben and Sofia incorporate Maker & Crate Ltd, a curated homeware marketplace, with 100,000 ordinary £0.001 shares — £100 of capital, issued 60,000/40,000 to match their agreed 60/40 split. A year later they create an option pool of 11,111 new shares for early hires: 11,111 of the enlarged 111,111 total is almost exactly 10%.
Had they incorporated with 100 £1 shares instead, the same pool would need 11.1 shares — and fractions of a share cannot exist, so they would be subdividing their share capital mid-hire, with resolutions and filings, before granting a single option. Same £100 of capital either way; very different amount of friction.
Where founders go wrong
Incorporating with 100 £1 shares "to keep it simple"
— the first 0.5% promise hits the fractional-share wall; 100,000 shares at £0.001 costs the same £100.Thinking more shares means more value
— share count changes slice size, not pie size; investors price the whole company.Ignoring the pay-up cost of £1 nominal at scale
— 1,000,000 shares at £1 means founders owe £1,000,000; at £0.0001 it is £100.Fixing a bad split with informal transfers
— moving shares between founders has paperwork and tax consequences; document it properly or take advice.
Related questions
What nominal value should the shares have?
Startups planning to raise typically use £0.001 or £0.0001, because shares can never be issued below nominal value and a tiny figure keeps that floor irrelevant. £1 shares are common at incorporation but less flexible later. Pairing 100,000 shares with £0.001 keeps the total at an affordable £100. [More: What nominal share value should a startup use (£0.001 vs £1)?]
How should co-founders split the shares?
There is no legal formula: equal and unequal splits are both lawful. What matters is agreeing the split — and vesting — before the company has value, then issuing the numbers that match it exactly, which a large share count makes easy. [More: How should co-founders split equity in a UK startup?]
Can I issue more shares after incorporation?
Yes — companies issue new shares at every funding round and option exercise. The process involves board and sometimes shareholder approvals, respecting any pre-emption rights, and filings at Companies House. Your incorporation number is a starting point, not a cap on later growth. [More: How do I issue new shares in a UK company?]
Do I have to pay for my shares?
Yes — at least the nominal value, either on issue or left outstanding as a debt you owe the company. This is why count times nominal value matters: 100,000 shares at £0.001 costs £100, while the same count at £1 nominal would leave founders owing £100,000.
Share numbers feel like trivia at incorporation and become structural the day you promise someone a percentage — options, advisors and investors all inherit whatever you chose. A SuLe solicitor can sense-check your share count, nominal value and split before you file. Book a free 15-minute consultation about your setup
Keep reading: What nominal share value should a startup use (£0.001 vs £1)? · Should I use model articles or bespoke articles of association? · What legal documents does a UK startup actually need? · What is a PSC and who counts as one? · What is a cap table and how do I keep it clean? · How big should a startup option pool be?
Primary sources: GOV.UK — Set up a private limited company · Companies Act 2006
