What is a cap table?
A capitalization table — better known as a cap table — is the master record of who owns what in a startup. It lists every shareholder, the number of shares each holds, and the percentage ownership those shares represent. At the earliest stages, a cap table can fit on the back of a napkin: two founders, fifty-fifty. Within a year or two, it can balloon into a complex spreadsheet of common stock, preferred stock, options, warrants and convertible notes spread across multiple rounds. Founders who treat the cap table as a living document — rather than something an accountant updates once a year — make better decisions about hiring, fundraising and exits.
Why does it matter? Because every major decision a founder makes either creates, destroys or redistributes equity. Bringing on a co-founder, hiring an early engineer with stock options, taking a SAFE from an angel, raising a priced round — each one changes the cap table. If you do not understand how those changes ripple through ownership and dilution, you can wake up one morning to discover that you control much less of your company than you thought. A clean, well-modelled cap table protects founders from that surprise.
How dilution works
When new investors come in, the company issues fresh shares to them. The total share count grows, so existing holders own a smaller percentage of a (hopefully) bigger pie. The math is straightforward: if a startup has 10,000 shares and an investor buys 2,500 new shares, the new total is 12,500. The investor owns 2,500 / 12,500 = 20%, and the founders together drop from 100% to 80%. The price per share is set by the pre-money valuation: a ₹10 crore pre-money on 10,000 shares means each share is worth ₹10,000, so a ₹2.5 crore investment buys 2,500 shares.
Common mistakes to avoid
- Not tracking option pool top-ups — they dilute founders, not investors.
- Mixing up pre-money and post-money calculations.
- Issuing shares without a board resolution or proper paperwork.
- Forgetting that SAFEs and notes also dilute when they convert.
- Modelling a single round in isolation instead of stacking 2–3 rounds ahead.
- Failing to keep a single source of truth — multiple spreadsheets always drift.
Tips for founders
Update your cap table within a week of every share issuance, no exceptions. Before any term sheet, model at least two future rounds to see how dilution stacks. Reserve an option pool of 10–15% before raising a priced round, but negotiate hard on whether it comes from pre-money or post-money — that single decision can move founder ownership by several percentage points. And always store one canonical version, ideally on a cap table platform once you cross 5–6 holders.