The option pool is equity reserved for employee stock options. Everyone agrees you need one. The fight is when it gets created — before or after the new money — and who absorbs the dilution. Pre-money pool creation is called the option pool shuffle. It is one of the most common ways founders lose extra points at Series A without a line item they recognise.
Reading time: 8 minutes. Worked example: $15M pre with a 15% pool carved pre-money vs post-money — several percentage points of founder dilution hinge on one term-sheet phrase.
The option pool (employee option pool, ESOP) is a block of shares reserved for future employee grants. You need it to hire — especially senior engineers and executives who expect equity. Investors want you to have one before they price the round, because they do not want their ownership diluted by a pool created right after they invest.
The pool is not free. It comes out of someone's ownership. The question is whose. Pre-money pool creation dilutes existing shareholders — usually founders — before the new investor's money enters. Post-money pool creation shares the dilution between founders and the new investor. Same pool size, different split. That difference is the option pool shuffle.
Typical pool targets at seed/Series A: 10–20%, with 15% the most common default in US-style term sheets. The right size is what your 12–18 month hiring plan requires — not a round number an investor copied from another deal.
In a priced round, the term sheet states: "15% option pool" and whether the pool is included in the pre-money valuation or carved out after. Pre-money inclusion is the shuffle — the pool is created by diluting only the existing cap table before the new money is calculated.
Pre-money shuffle: investor says "$15M pre with a 15% pool included in pre." Founders dilute to create the pool first; then the investor buys their stake. The investor's percentage is calculated on a cap table that already includes the pool — founders paid 100% of the pool dilution.
Post-money pool: investor says "$15M pre, 15% pool created post-money." Founders and investor share the dilution from the pool. Founders keep more — how much more depends on the round size and pool %, but the gap is never zero.
This is standard Series A negotiation, not edge-case lawyering. Most founders only learn the phrase after their first term sheet. By then, the investor has anchored on pre-money inclusion because it is industry default — which is not the same as non-negotiable.
You agree a $15M pre-money valuation and a 15% option pool. You and your co-founder currently own 100% (simplified — no prior investors). A new investor puts in $5M.
Scenario A — 15% pool included in pre-money (shuffle): the pool is carved from the existing cap table before the investment. Founders drop from 100% to 85% to create the pool. Then the investor buys $5M at $15M pre on that diluted base. Post-money ≈ $20M. Investor ownership ≈ $5M ÷ $20M = 25.0%. Founders ≈ 63.75% (85% × 75%). The pool is 15%.
Scenario B — 15% pool created post-money: investor buys $5M at $15M pre first → investor ≈ 25.0%, founders ≈ 75.0% on a $20M post-money cap table. Then the 15% pool is created, diluting everyone. Founders ≈ 63.75% (75% × 85%), investor ≈ 21.25% (25% × 85%), pool 15%.
Founder ownership is similar in these simplified numbers — the investor pays in Scenario B (21.25% vs 25.0%). The shuffle's cost shows up in effective price per share and in who bears dilution when the pool is expanded later. The more common founder surprise: Scenario A with an oversized pool. Push to 20% pool pre-money when 12% would cover hires, and founders lose an extra 5 percentage points they never budgeted — because the pool was never tied to a hiring plan.
Build a bottom-up option budget: roles, grant sizes, vesting. If you need 12% for planned hires, do not accept a 20% pool because the template says so. Every extra point is founder dilution.
Push for post-money pool creation or a smaller pre-money inclusion. This is negotiable. Investors will push back; that is the conversation. Silence means you accepted the shuffle.
A $15M pre with 15% pool pre-money is not the same effective valuation as $15M pre with no pool. Compare deals on fully-diluted basis, not headline pre.
Series B will refresh the pool. Track how much was actually granted vs reserved. Unused pool that inflated dilution at Series A is a common founder regret.
Default: size the pool to the hiring plan, negotiate post-money carve when you can, and model fully-diluted ownership — not headline pre-money — before you sign the term sheet.
Upload the term sheet or SPA. Prism extracts: option pool size (%), whether the pool is included in pre-money valuation, refresh triggers, and any "promised" grants that should reduce the required pool. It models founder ownership post-close and compares pool size to your playbook ceiling.
The output flags oversized pools ("20% pool vs 12% playbook max for current headcount") and pre-money shuffle structures when your playbook requires post-money treatment. Severity reflects how many points of founder dilution are at stake — not whether option pools exist at all.
Every term sheet has a pool line. Most founders read the valuation line first. Prism reads both — because the shuffle lives one line below.
Closed alpha. Premium tier — €49/month, no free tier, no demos. Read the home page if you haven't, then drop your email.
Startup dilution — where the option pool fits in the fully-diluted math you should model before signing.
Priced round vs SAFE — the option pool shuffle appears in priced rounds — SAFEs defer the conversation until conversion.
Post-money vs pre-money SAFE — pre-money vs post-money shows up again in pool timing — same concept, different document.
If there's a term you're trying to understand right now and it's not here, tell us — the order we write these in is driven by what founders ask for.
