A cap table — short for capitalisation table — is the single most important financial document a startup founder will maintain from day one through to exit. It records who owns what in the company: every share, every option, every convertible instrument, and every vesting schedule. Yet many founders treat their cap table as an afterthought until a Series A investor asks to see it — and discover that years of informal agreements, uncleaned conversions, and poorly tracked option grants have created a mess that takes weeks and thousands in legal fees to untangle.
This guide covers everything founders need to know about building, maintaining, and optimising their cap table from incorporation through to growth stage — with particular attention to the European context where multi-jurisdiction structures and local instruments add complexity.
What Is a Cap Table?
A capitalisation table is a detailed ledger of all equity ownership in a company. At its simplest, it lists every shareholder, the number of shares they own, the class of shares, and their percentage ownership. As the company grows, the cap table expands to include stock options (both vested and unvested), warrants, convertible notes, SAFEs, and any other instruments that could convert into equity.
The cap table serves multiple purposes. It is the foundation for fundraising conversations — investors need to understand the existing ownership structure before they can model what their investment will buy. It governs voting rights and governance decisions. It determines how proceeds are distributed in an exit. And it is the basis for tax calculations on equity compensation for employees.
A well-maintained cap table should answer several key questions at any moment: who owns what percentage of the company, what is the fully diluted ownership (including all options and convertible instruments), how would a new investment round affect existing shareholders, and how would exit proceeds be distributed at various valuations.
Building Your Cap Table From Day One
The cap table begins at incorporation. When founders set up the company, they issue the initial shares — typically split among the co-founders according to an agreed ratio. The most common mistake at this stage is not having a frank conversation about equity splits and vesting early. Equal splits among co-founders are simple but not always appropriate; the equity split should reflect each founder’s contribution, commitment, and role.
Founder vesting is essential even among co-founders who trust each other implicitly. A standard four-year vesting schedule with a one-year cliff ensures that if a co-founder leaves early, the remaining team retains an appropriate share of the equity. Without vesting, a co-founder who departs after six months could walk away with 33% or 50% of the company — a “dead equity” problem that poisons future fundraising.
Share classes. At incorporation, founders typically hold ordinary shares (common stock). When institutional investors come in at seed or Series A, they receive preferred shares — a different class with specific rights (liquidation preferences, anti-dilution protection, governance rights). The cap table must track each class separately, as they carry different economic and governance rights.
Initial structure. A clean cap table at incorporation might look like this: 10,000,000 ordinary shares split among 2-3 founders, with a vesting schedule attached to each. Some founders also reserve shares for an early advisor pool (1-3%) and begin setting up an employee stock option plan (ESOP), though the ESOP is often formally created later.
How Funding Rounds Affect Your Cap Table
Each funding round changes the cap table by issuing new shares to investors, which dilutes existing shareholders proportionally. Understanding this dilution math is critical for founders who want to maintain meaningful ownership through multiple rounds.
Pre-money vs post-money valuation. The pre-money valuation is what the company is worth before the new investment. The post-money valuation is the pre-money plus the new capital. If a company has a €10 million pre-money valuation and raises €2.5 million, the post-money is €12.5 million, and the new investors own 20% (€2.5M / €12.5M). All existing shareholders are diluted by 20% — a founder who held 60% now holds 48%.
Option pool creation. Series A investors typically require the company to establish or expand an employee stock option pool (ESOP) before the round closes, usually sized at 10-15% of fully diluted shares. Critically, this pool is created from the pre-money valuation — meaning the dilution from the option pool falls on existing shareholders (founders and seed investors), not on the new Series A investors. This is one of the most misunderstood mechanics in startup fundraising and can have a significant impact on effective valuation.
Convertible instrument conversion. When SAFEs and convertible notes convert at a priced round, they add additional shares to the cap table. If a company has raised €1 million in SAFEs with a €5 million cap, and the Series A is priced at €10 million pre-money, the SAFEs convert at the €5 million cap — giving SAFE holders a larger percentage than if they had invested at the Series A price. Modelling these conversions accurately before a fundraise is essential to avoid surprises.
The Employee Stock Option Pool
An employee stock option pool (ESOP) is a reserved block of shares set aside for current and future employees. Options give employees the right to purchase shares at a predetermined price (the “strike price” or “exercise price”) after they vest, typically over four years with a one-year cliff.
The ESOP is a critical tool for attracting and retaining talent, particularly in the competitive European tech market where startups cannot always match the salaries offered by large corporations. However, the ESOP also affects the cap table in important ways — every option granted represents potential dilution for all other shareholders.
European ESOP structures vary by jurisdiction. In France, the BSPCE (Bons de Souscription de Parts de Créateur d’Entreprise) is a tax-efficient equity incentive scheme specifically designed for startup employees. The UK has EMI (Enterprise Management Incentive) options with favourable tax treatment. Germany has historically been less friendly to employee equity, though recent reforms have improved the landscape. Understanding the local instrument and its tax implications is essential before making grants.
Cap Table Management Tools
While early-stage cap tables can be managed in a spreadsheet, the complexity grows quickly. By the time a company has two or three funding rounds, convertible instruments, an ESOP, and multiple vesting schedules, a spreadsheet becomes error-prone and difficult to maintain. Dedicated cap table management tools provide accuracy, scenario modelling, and compliance features that spreadsheets cannot.
European-focused tools include Ledgy (Zurich-based, strong across European jurisdictions), SeedLegals (UK-based, integrated with legal document generation), and Capdesk (UK-based, focused on employee equity management). US-origin tools with European presence include Carta (the market leader globally) and Pulley. When choosing a tool, ensure it supports the specific share classes, instruments, and tax regimes relevant to your jurisdiction.
Common Cap Table Mistakes
The most damaging cap table errors are those that compound over time. Failing to implement founder vesting leaves the company vulnerable to dead equity if a co-founder departs. Over-allocating equity to early advisers or minor contributors (giving 5% to someone who provides a few introductions) wastes precious equity that will be needed for key hires and investors later.
Issuing too many convertible instruments without tracking cumulative dilution can lead to a cap table where founders own less than 50% before even reaching Series A. Not maintaining accurate records — relying on handshake agreements rather than formal share certificates and board resolutions — creates legal risk and delays during due diligence.
In multi-jurisdiction European structures (for example, a French SAS with a UK subsidiary), ensuring that the cap table accurately reflects the entire group structure and that equity grants are compliant in each jurisdiction requires careful legal and tax advice. This is an area where cutting corners at the seed stage creates expensive problems at Series A and beyond.
Modelling Future Dilution
Smart founders model their cap table several rounds forward. A typical dilution trajectory for a European startup might look like this: founders start with 100%, give up 10-20% at seed, another 15-25% at Series A (including the ESOP), and a further 10-20% at Series B. By Series C, founders may collectively own 25-40% of the company — which, at a meaningful valuation, represents substantial economic value.
The key insight is that dilution is not inherently bad — it is the cost of growth. Owning 30% of a company worth €100 million is vastly better than owning 100% of a company worth €2 million. The goal is to ensure that each round of dilution is funded by genuine value creation, not by unfavourable terms or premature fundraising.