Cap tables 101: what founders need before their first funding round

Most first-time founders meet the phrase "cap table" for the first time in a term sheet, usually attached to a spreadsheet nobody has fully explained to them. That is a bad place to learn it. A capitalisation table is not paperwork you tidy up once the money is in the bank — it is the single document that answers the question every investor, co-founder and endorsing body eventually asks: who actually owns this business, and how much of it?

Get the cap table wrong — inconsistent numbers, undocumented promises to early collaborators, a founder who has quietly given away 40% before anyone invested a pound — and it becomes a credibility problem that surfaces at the worst possible moment: due diligence, a funding round, or an endorsement review.

What a cap table actually shows

At its simplest, a cap table lists every person or entity that holds equity in the company, the number and class of shares they hold, and the percentage of the company that represents on a fully diluted basis. "Fully diluted" is the important qualifier — it means the percentages account for everything that could become a share in future, including unexercised options and any convertible instruments like SAFEs or convertible loan notes, not just the shares that legally exist today.

A one-founder, pre-revenue company has the simplest possible cap table: 100% held by one person, perhaps with a small option pool reserved for future hires. As the business takes on co-founders, early employees with equity, and investors, the table grows a row for each new holder and a column for each new event — every share issue, every option grant, every conversion.

The mechanics of company ownership sit downstream of your choice of business structure. If you have not yet decided between a limited company, LLP or other structure, read Sole Trader, Ltd, LLP or PLC: choosing your UK business structure first — cap tables only apply to companies with share capital, which for almost every Innovator Founder means a private limited company.

Why dilution happens and why it is not automatically bad

Every time a company issues new shares — to an investor, to a new co-founder, or into an option pool — the percentage owned by every existing shareholder falls, even though the number of shares they personally hold does not change. This is dilution, and it is the mechanism that makes external investment possible at all: you are trading a smaller slice of a bigger pie for the capital to grow it.

The founder-friendly way to think about dilution is in absolute value, not percentage. Owning 70% of a company worth £200,000 is worth less in cash terms than owning 55% of a company worth £2 million after a funding round that actually let you build the thing. Dilution only becomes a genuine problem when it happens without a corresponding increase in the value or viability of the business, or when a founder gives away equity carelessly early on — a common trap is handing a large stake to an early advisor or contractor for vague future help, with no vesting and no clear justification, then having to explain that decision to every investor and assessor afterward.

What is an option pool, and why does it come out of my slice?

An option pool is a reserved block of unissued shares set aside specifically to grant to future employees as part of their compensation, typically vesting over three to four years. Because early-stage companies cannot always compete on salary, equity via an option pool is one of the main levers UK founders have to attract talent without large payroll budgets — a point that connects directly to the job-creation evidence expected under the Innovator Founder growth criteria; see What 10 jobs actually cost: modeling job creation in your BP for how that evidence is usually built.

The detail that catches founders out: investors leading a priced round typically insist the option pool is created, or topped up, immediately before their investment — not after. This is sometimes called the "pre-money option pool shuffle." Because the pool is created pre-money, the dilution from it lands entirely on the existing shareholders (mainly the founder), not on the incoming investor. A £1 million investment at a stated £4 million pre-money valuation, with a 10% option pool required as a condition, effectively values the company somewhat lower than the headline number suggests once you do the arithmetic — always ask for the fully diluted post-money cap table, not just the headline percentage, before agreeing terms.

How does an assessor actually read a cap table?

Endorsing bodies assessing the Innovator Founder route are not equity lawyers, and they are not auditing your cap table line by line. What they are checking is whether it tells a coherent, credible story that lines up with the rest of your business plan:

• Does the investment you claim actually show up as equity or a recorded instrument? A founder who states "£150,000 invested" in their business plan narrative needs that reflected somewhere concrete — new shares issued to an identifiable investor, or a convertible instrument on record — not just a bank transfer with no paper trail.
• Has the founder retained a credible, controlling stake? An assessor evaluating founder commitment and control will look sceptically at a founder who has already diluted down to a small minority stake before any institutional round, since Home Office guidance on the route expects the applicant to be a genuine founder actively leading the business, not a passenger.
• Is the ownership structure internally consistent? Percentages across shareholders should sum to 100% on a fully diluted basis, share classes should be named consistently, and the story behind large or unusual allocations (a big early grant to a friend, an outsized advisor stake) should have a plain-English explanation ready.

If you are still deciding how much equity, if any, to offer a co-founder or a very early hire, it is worth pressure-testing that decision against your financial model rather than gut feel — see Building revenue assumptions assessors won't reject for the same evidence-first discipline applied to your numbers.

Common cap table mistakes founders make early

Splitting founder equity 50/50 by default, with no vesting. An even split feels fair on day one, but it does not reflect that founders rarely contribute equally over time, and it removes the natural mechanism — vesting — that protects the company if one founder leaves early. Most experienced investors expect to see founder vesting schedules (commonly four years with a one-year cliff) even among co-founders who trust each other completely.

Treating a SAFE or convertible note as "not real equity yet." Simple Agreement for Future Equity instruments and convertible loan notes do not issue shares immediately, but they do dilute future shareholders when they convert, usually at a discount to the next priced round. A cap table that ignores outstanding convertibles will be wrong — sometimes badly wrong — the moment a real round happens. Always model the fully diluted picture including unconverted instruments.

Not updating the cap table when small grants happen. A five-hour freelance logo designer paid partly in equity, a friend given a token "advisor" stake for an intro — these feel too small to formalise, but they accumulate, and reconstructing them accurately eighteen months later from memory and old emails is far harder than recording them at the time.

How this connects to your business plan and financial model

Your cap table and your financial model should never contradict each other. If your business plan claims a founder investment of a specific amount, that figure needs a corresponding cap table entry — shares issued in exchange for cash, or a director's loan properly documented on the balance sheet. If you are projecting a future funding round to fund growth, your financial model's cash flow should show that inflow landing at a plausible point, and your cap table narrative should be honest about how much dilution that round is expected to cost you. Investors and assessors alike are quick to spot a business plan that references funding events the cap table does not support.

Sources and further reading

• UK Innovator Founder Visa — Immigration Rules Appendix
• Innovator Founder Visa — DavidsonMorris guide
• Set up a business — GOV.UK

Key takeaways

• A cap table shows every shareholder's fully diluted percentage, including unissued option pool shares and unconverted instruments like SAFEs.
• Dilution is not automatically bad — judge it by whether the business's value grew enough to offset the smaller percentage.
• Option pools are usually created pre-money, so the dilution lands on existing shareholders, not the incoming investor — always check the fully diluted post-money picture.
• Endorsing bodies read the cap table as investment evidence: does claimed funding actually appear as recorded equity, and has the founder kept a credible controlling stake?
• Undocumented equity promises to co-founders or early collaborators are one of the most common and most damaging cap table problems — put every grant in writing, with vesting, from day one.
• Keep a single, dated, continuously updated record from incorporation — reconstructing a cap table under pressure before a raise or a submission is far harder than maintaining one as you go.

• cap-table
• equity
• fundraising
• dilution
• business-plan