Option Pool Explained: The Shuffle Founders Miss (2026)

Option Pool Explained for Founders

The option pool looks like a footnote in the term sheet. It's often the single largest source of dilution in a Series A after the new money itself. Understanding the shuffle is worth real percentage points.

What the option pool is

A reserved slice of the cap table set aside for future employee equity grants. Standard sizes: 10% at seed, 10–15% at Series A, 5–10% at Series B. Expressed as a percentage of the post-money cap table.

The pre-money shuffle

Investors almost always require the new pool to be created pre-money — meaning existing shareholders (founders + prior investors) absorb the dilution, not the new investor. A 12% new pool on a $10M pre-money round dilutes founders by roughly 12%, on top of the ~20% for the round itself.

Why it matters

A $10M pre-money round with a 15% pre-money pool leaves founders meaningfully more diluted than the headline pre-money would suggest. On a $5M round at $15M post ($10M pre-money), that pool costs founders 3–5 additional percentage points.

How to size it

Bottom-up. List every role you'll hire in the next 12 months and the equity grant each will need. Add 20% buffer. That's the real number — probably 6–8% at Series A, not 12–15%. Push back on default pool sizes with a specific hiring plan.

Negotiation levers

Bottom-up hiring math. Post-money pool (rare but not impossible). Increasing the pre-money valuation to offset the dilution. Committing to top up the pool only when hires are made, not upfront.

Unused pool at exit

Any unused pool converts pro-rata to all shareholders at exit — so oversizing 'costs' founders during the round but partially returns at exit. This is small comfort during Series A dilution math.

Frequently asked questions

Is the option pool always pre-money?

Almost always at Series A and later. Rare exceptions at seed with founder-friendly lead investors.

What's a fair Series A option pool size?

6–10% based on a real hiring plan. 12–15% is a default that quietly transfers value from founders to the round.

Do I need to top up the pool at every round?

Yes — new hires and refresh grants consume the pool. Each round typically resizes the pool back to 10–15%.

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