A capitalisation table — universally shortened to "cap table" — is the single source of truth for who owns what in a company. For founders, it is one of the most important documents in the business, and yet it is frequently maintained as a fragile spreadsheet that grows more error-prone with every grant, transfer, and funding round. Understanding what a cap table is and how to manage it well is fundamental to running a company that has equity holders. This guide covers the basics.
What a cap table is
A cap table is a record of all the equity ownership in a company — who holds shares or options, how many, and what percentage of the company that represents. At its simplest, it lists every shareholder and equity holder alongside their holdings, and shows how ownership is divided across founders, investors, employees (through the ESOP), and anyone else with a stake.
A good cap table answers questions like: what percentage of the company does each founder own? How much is held by investors from each funding round? How much of the ESOP pool has been granted, and how much remains? What does ownership look like if all options are exercised? These are questions that come up constantly — in fundraising, in hiring discussions, in planning — and the cap table is where the answers live.
Fully diluted ownership
One concept is essential to understanding cap tables: the difference between issued shares and fully diluted ownership.
Issued shares are the shares that have actually been issued. Fully diluted ownership additionally accounts for all the equity that could be issued — unexercised options, the unallocated ESOP pool, convertible instruments, warrants, and anything else that may convert into shares. Fully diluted is the "if everything converts" view.
This distinction matters enormously because ownership percentages look different on the two bases. A founder's percentage of issued shares is higher than their percentage on a fully diluted basis, because the fully diluted figure includes the dilution from the ESOP pool and other instruments. When people talk about ownership percentages — especially in fundraising — they usually mean fully diluted, because that is the real economic picture. Getting confused between the two is a common source of misunderstanding.
What changes a cap table
A cap table is a living document. Several kinds of events change it.
Funding rounds are the big ones. When investors put money in, new shares are issued to them, which changes everyone's percentages — existing holders are diluted as the pie grows to accommodate the new investors. Each round adds a new layer to the cap table, often with its own share class and terms.
ESOP grants change it too. Each grant of options to an employee allocates part of the ESOP pool, and as options vest and are eventually exercised, they convert into issued shares. The state of the pool — granted, vested, exercised, available — is part of the cap table picture.
Other events include share transfers (when someone sells or transfers their holding), buybacks, the conversion of convertible instruments, and forfeitures when employees leave with unvested options that return to the pool. Every one of these has to be recorded accurately, because they all affect the ownership percentages.
Why funding rounds are where cap tables get complicated
Funding rounds deserve special mention because they are where cap table complexity compounds. Each round can introduce a new class of shares with its own rights — liquidation preferences, anti-dilution provisions, and other terms — and the interaction of these across multiple rounds makes the "who gets what" calculation in a future exit genuinely intricate. Modelling how a given exit value would be distributed across all the share classes, preferences, and the ESOP requires the cap table to capture not just the holdings but the terms attached to each layer.
For an early-stage company this is manageable, but it grows more complex with each round, which is precisely why a casual spreadsheet becomes inadequate over time.
Why spreadsheet cap tables break down
Most companies start with a cap table in a spreadsheet, and for the very early days that is fine. But spreadsheets degrade as a company grows, for predictable reasons.
Every grant, transfer, vesting event, and round has to be entered by hand, and manual entry accumulates errors. Multiple versions proliferate — the "final" cap table, the "final v2," the one the lawyer has, the one the founder updated — and they drift out of sync. The fully diluted calculation, especially across multiple share classes with different terms, becomes hard to get right in a spreadsheet. And the connection between the cap table and the things that drive it — ESOP grants, vesting, exercises — is entirely manual, so the cap table is only as current as the last time someone remembered to update it.
The consequence is that many growing companies have cap tables they are not fully confident are correct, which is a serious problem when fundraising or considering an exit, where cap-table accuracy is scrutinised closely.
Common cap table mistakes
The recurring errors include:
Confusing issued shares with fully diluted ownership, and quoting the wrong percentages.
Letting multiple versions of the cap table proliferate and drift out of sync.
Failing to record ESOP grants, vesting, exercises, and forfeitures accurately, so the equity picture is wrong.
Getting the fully diluted calculation wrong across multiple share classes.
Not capturing the terms attached to each funding round, so exit modelling is unreliable.
Discovering cap-table errors during due diligence, at the worst possible moment.
Why your cap table belongs with ESOP, hiring, and payroll
The reason cap tables drift is that they are downstream of events that happen elsewhere — an employee is hired and granted options, options vest over time, an employee leaves and forfeits unvested options, an employee exercises and shares are issued. When the cap table is a standalone spreadsheet disconnected from the ESOP system, the hiring system, and payroll, every one of these events has to be manually propagated, and the cap table inevitably falls behind.
When the cap table, ESOP management, vesting, hiring, and payroll all sit on a single database, the cap table is always current by construction — a grant on hiring appears immediately, vesting updates the earned picture, a leaver's forfeiture returns options to the pool, and an exercise issues shares and flows through payroll and tax together. There are no competing versions and no manual propagation. This is exactly how Helion is built — the cap table lives natively alongside ESOP, hiring, and payroll on the same schema — so it is always accurate and always reflects the real, current ownership. For a founder who needs a cap table they can trust when an investor or acquirer comes asking, that single-source-of-truth design removes one of the most common and most consequential sources of cap-table risk.
This guide gives general information on cap table management for founders and is not legal, tax, or financial advice. Cap table structures, share classes, and the terms of funding rounds should be managed with qualified legal and financial advisors in the context of your specific company and jurisdiction.