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The option-pool shuffle: who really pays for the new pool

"We'll need a 10% option pool post-close" sounds like a hiring plan. It's also a pricing move. When the pool top-up is created in the pre-money — the standard ask — founders and converting SAFEs pay for the entire pool, while the new investor's percentage is untouched. Here's the shuffle, with the exact points and price change.

What "the shuffle" is

A lead usually wants a target option pool (say 10%) to exist after the round closes. The question is who funds it. If the new shares are added to the pre-money cap table, they lower the price per share, so the same pre-money valuation now buys the founder a smaller slice — the pool comes out of the existing holders. If they were added post-money, the new investor would share the cost. Almost every term sheet puts it in the pre-money. That's the shuffle.

pool created in pre-money → founders + SAFEs pay, price per share drops pool created in post-money → everyone (incl. new investor) shares the cost

Worked example — the same round, with and without a pool

Base case: 10,000,000 founder shares, one $1,000,000 SAFE at a $10,000,000 cap, a $4,000,000 round at a $16,000,000 pre-money. First with no pool, then with a 10% post-round pool created in the pre-money.

No pool10% pre-money pool
Price per share$1.44$1.24
Founder ownership after72.0%62.0%
New pool shares created01,612,903
New investor ownership20.0%~20.0%
Adding a 10% pre-money pool drops the founders from 72% to 62% — the full 10 points — while the new investor still lands at ~20%. The price per share also falls from $1.44 to $1.24, because the same $16M pre-money is now spread across more pre-money shares. The new money didn't pay for the pool; you did. Both columns are the engine's output.

Why the price per share drops

The priced-round price is set so pre-money = price × pre-money fully-diluted shares. Add pool shares to the pre-money side and the share count goes up, so the price has to come down to keep the pre-money valuation fixed. A lower price is exactly why founders and SAFEs get diluted more — their existing shares are each worth less of the pre-money.

What you can actually negotiate

The point is not that pools are unfair — a company needs equity to hire. The point is that the pool is a real cost to you, denominated in points, and it's negotiable. Walking in knowing "a 10% pre-money pool costs me 10 points and drops my price to $1.24" is a very different conversation than nodding at "standard 10% pool."

Caveat. The exact hit depends on how much unallocated pool already exists, whether the pool is measured on post-money or a different base, and the interaction with your converting SAFEs. This engine treats the target as new pool as a fraction of post-round fully-diluted and shows the top-up explicitly; your term sheet's definition may differ. Confirm the pool mechanics with counsel. Not investment, legal, or tax advice.

See what the pool costs you

The report's waterfall breaks out the pool top-up as its own line so you can see exactly who pays — and models the round with and without it across your scenarios.

Try the free estimate Get the report — $390

Related guides

How a post-money SAFE converts into shares → Stacked SAFEs: why the percentages add → Bear / base / bull: modeling the dilution range →