Startup Cap Table

What a cap table is

A capitalization table — almost always shortened to "cap table" — is the master record of who owns what in a company. It lists every shareholder, the kind of security each holds, how many shares they own, and what slice of the company that represents. For a startup it is the single source of truth for ownership: who controls the company, who profits in an exit, and how much each new investment costs the existing owners.

A cap table starts out trivially simple — two founders, 50/50 — and grows more complex with every option grant, angel cheque, convertible instrument, and priced round. The discipline of keeping it accurate from day one is what prevents painful, expensive surprises later (a financing that stalls because nobody can prove who owns what is a real and common failure).

This guide is educational and general in nature. It is not legal, tax, or financial advice. Equity, securities, and tax rules vary by jurisdiction — confirm anything that matters with a qualified lawyer and accountant before you rely on it.

Key concepts you need to understand

A cap table is mostly arithmetic, but a handful of concepts trip people up:

• Issued (outstanding) shares vs. fully-diluted shares. Issued shares are the ones actually granted to shareholders today. Fully-diluted shares assume every instrument that could become shares has — the whole option pool (granted and ungranted), all warrants, and all convertible notes/SAFEs converting. Almost every ownership percentage that matters in a negotiation is a fully-diluted percentage, because that is what you truly own once the dust settles.
• Option pool / ESOP. The Employee Stock Option Pool (also called the option pool or ESOP) is a block of shares reserved to grant to employees, advisors, and contractors. Reserved-but-unallocated pool shares still count in the fully-diluted total, so the pool dilutes the founders the moment it is created — not when options are granted.
• Pre-money vs. post-money valuation. Pre-money is what investors agree the company is worth before their cash goes in. Post-money = pre-money + the new money raised. The investor's ownership = investment / post-money. If a startup raises 1,500,000 dollars at a 6,000,000 pre-money, the post-money is 7,500,000 and the investor owns 1,500,000 / 7,500,000 = 20%.
• Dilution. When new shares are issued, existing owners hold the same number of shares but a smaller percentage of a (hopefully) larger company. Dilution is not inherently bad — owning a smaller slice of a much bigger pie is the entire point of raising capital. What matters is whether the value created exceeds the ownership given up.
• SAFEs and convertible notes. A SAFE (Simple Agreement for Future Equity) and a convertible note are instruments that take money now and convert into shares later, usually at the next priced round, at a discount and/or capped valuation. They are not shares yet, so they sit in a separate part of the cap table until they convert — at which point they dilute everyone. Modelling that conversion before you sign the next round is one of the most valuable things a cap table does.

When you need a cap table

You need a maintained cap table far earlier than most founders think — effectively the moment ownership stops being a clean even split or you take on any outside money:

• At incorporation, to record the founder share split and any vesting schedules.
• When you create the option pool and start granting equity to employees and advisors.
• Whenever you raise — angels, a startup funding proposal, a SAFE/note round, or a priced seed/Series A. Investors will ask for it during due diligence.
• Before you model a new round, to see exactly how a proposed valuation and pool top-up dilute you.
• At an exit or acquisition, to calculate who receives what from the proceeds.

In short: if the answer to "who owns this company and how much?" is anything other than "obviously, the founders, equally," you should have a cap table.

What a cap table contains

A practical startup cap table has a few parts:

• A shareholder table — one row per holder: name, security type (common, preferred, options, SAFE), number of shares, and the resulting fully-diluted percentage.
• The option pool, shown as its own line so reserved-but-ungranted shares are visible.
• Convertibles (SAFEs/notes) listed separately with their key terms (amount, cap, discount), since they are not shares until they convert.
• A totals row that reconciles to 100% on a fully-diluted basis.
• Round / terms notes — pre-money, post-money, price per share, and any special rights — so the numbers can be understood and audited later.

The investor update you send afterwards (see startup investor update) often references the cap table, and the assumptions behind it usually live in your financial forecast and startup budget.

Common mistakes to avoid

• Confusing issued and fully-diluted percentages. Quoting your "ownership" on an issued basis makes it look higher than it really is. Negotiate and report on a fully-diluted basis.
• Forgetting the option pool dilutes founders. Investors frequently require the pool to be created or topped up pre-money, which means the founders — not the new investor — absorb that dilution. Know this before you agree to a term sheet.
• Ignoring SAFEs and notes until they convert. A stack of uncapped or low-cap SAFEs can dilute founders far more than expected at the next round. Always model conversion in advance.
• Letting the cap table drift out of date. Verbal promises of equity, ungranted approvals, and untracked share transfers create a cap table nobody trusts — and that can stall or kill a financing.
• Hand-rolling a complex cap table in a single flat spreadsheet. It works for two founders; it breaks badly once you have multiple security classes, vesting, and conversions. Move to dedicated software before it bites.
• Promising percentages instead of shares. Equity is granted in shares, not percentages — a percentage only means something relative to a total that changes every round. Always grant and record share counts.