Startup Cap Table and Dilution: What Founders Must Model
Your cap table is the record of who owns what. Dilution is what happens when you issue new shares — to investors, employees, or advisors — and everyone’s percentage ownership falls even if their share count stays the same. Model ownership on a fully diluted basis before you sign, not after the term sheet is locked.
Updated August 8, 2026.
Fully diluted ownership
Fully diluted ownership assumes every outstanding option, warrant, and convertible instrument that will become equity is counted in the denominator. Quoting “founder owns 80% of issued common” while ignoring an unissued option pool and outstanding SAFEs understates what investors will own after conversion.
| Holder | Shares / equivalents | Fully diluted % |
|---|---|---|
| Founders (issued common) | 8,000,000 | 80% |
| Option pool (authorized, unissued) | 1,500,000 | 15% |
| Advisor grant (issued options) | 500,000 | 5% |
| Total fully diluted | 10,000,000 | 100% |
The option pool shuffle
In many priced rounds, investors require the option pool to be “refreshed” so that a target pool (for example 10–15%) exists after the round. If that pool is created or expanded before new money is calculated, the dilution hits existing shareholders — usually founders — not the new investors.
Always ask whether the pool percentage is pre-money or post-money and whether the increase happens before or after the new investment. Small wording differences move several points of ownership.
- Ask for a post-money ownership table that shows the pool explicitly.
- Compare founder % before pool increase vs after pool increase.
- Do not treat “10% pool” as free — someone is diluted to create it.
Model before you sign
Build a spreadsheet (or use a dilution calculator) with: current fully diluted shares, every SAFE or note with cap/discount, proposed new money and pre/post valuation, and the option pool target. Change one variable at a time so you see what actually moves founder ownership.
Common cap table mistakes
- Signing a SAFE without adding it to a living dilution model.
- Promising large advisor or early-hire grants without updating fully diluted %.
- Accepting a term sheet’s headline valuation without checking pool timing.
- Using issued-share percentages in investor conversations instead of fully diluted.
Put this into practice on Bowora
When you publish a fundraising listing, investors will eventually ask for a clean cap table. Get the model right first, then make the public raise signal match your stage and target.
Common questions
- What does fully diluted mean?
- Fully diluted ownership counts all shares that would exist if outstanding options, warrants, and converting instruments became equity. It is the ownership picture investors use when they talk about percentages.
- What is the option pool shuffle?
- It is when the employee option pool is expanded as part of a financing so that the pool hits a target size after the round. If the expansion is treated as pre-money, existing shareholders — often founders — take that dilution.
- When should I model dilution?
- Before you sign any SAFE, note, or term sheet, and again whenever you grant equity or change the pool. Modeling after signatures only tells you how much ownership you already gave away.
- Do SAFEs appear on the cap table before conversion?
- They should appear as outstanding convertible instruments with estimated ownership at the cap (and any discount scenarios). Ignoring them until conversion is how founders get surprised at the priced round.
Sources
Facts, frameworks, and program details were checked against these first-party references. Last content review: August 8, 2026.