Term sheets and priced rounds
The Option Pool Shuffle: How Pool Size Changes Your Real Valuation (and How to Negotiate It)
The short answer
In a priced round, investors usually require the option pool to be enlarged before the investment, so the new shares come out of the pre-money valuation and only existing holders are diluted. This "option pool shuffle" lowers the effective price the founders receive: a $5M investment at a $10M pre-money with a 20% post-money pool gives founders the same ownership as a $7M pre-money with no pool increase. Negotiate the pool from a 12 to 18 month hiring plan; Carta's data shows a median seed-stage pool of 11.8%, and it advises founders to push back on 20% demands.
Key numbers
| Metric | Figure | Source |
|---|---|---|
| Median seed-stage option pool | 11.8% | Carta, 15,000+ startups over five years (2025-2026) |
| Common Series A target (unissued, post-money) | About 10% to 15% | Practice; Acceleration; Venture Deals (no current Carta median found) |
| Investor demand to push back on | 20% | Carta guidance (2025-2026) |
| Pool placement in most term sheets | Inside the pre-money | Venture Deals; NVCA practice |
| Shuffle formula | T = S / (1 - investor % - pool %) | Arithmetic |
What the shuffle is
A term sheet might say: "Pre-money valuation: $10,000,000. Investment: $5,000,000. The company will reserve an unissued option pool equal to 20% of the post-closing fully diluted capitalization, which will be included in the pre-money valuation."
The price per share is the pre-money valuation divided by the pre-money fully diluted shares. Adding new pool shares to that denominator before closing lowers the price per share. The investor still buys exactly the percentage it wanted (one third of $15M post here), and the cost of the new pool falls entirely on the existing holders.
The formula
Let S be the existing shares excluding the unissued pool (founders, issued stock, outstanding options, converting SAFEs), i the investor's post-money percentage (new money / post-money), and p the target unissued pool after closing.
- Post-closing fully diluted shares: T = S / (1 - i - p)
- Investor shares = i x T; price per share = new money / investor shares
- Pool after closing = p x T (the top-up is that number minus any existing unissued pool)
- Effective pre-money = headline pre-money minus (new pool shares x price per share)
Worked example: three pool sizes
Founders hold 2,000,000 shares. No existing pool. Term sheet: $5,000,000 at $10,000,000 pre-money (investor buys 33.3%).
| Pool target (post-money) | Total shares T | Pool shares | Price per share | Founders after closing | Effective pre-money |
|---|---|---|---|---|---|
| 20% | 4,285,714 | 857,143 | $3.50 | 46.7% | $7,000,000 |
| 15% | 3,870,968 | 580,645 | $3.875 | 51.7% | $7,750,000 |
| 10% | 3,529,412 | 352,941 | $4.25 | 56.7% | $8,500,000 |
Check for the 20% row: investor shares = 4,285,714 / 3 = 1,428,571; $5,000,000 / 1,428,571 = $3.50; pre-money shares (founders + pool) 2,857,143 x $3.50 = $10,000,000.
Moving from a 20% to a 10% pool is worth 10 points of founder ownership and $1.5M of effective valuation, without changing the headline number.
The alternative: pool in the post-money
If the pool increase is made after the round (in the post-money), the price is $10M / 2,000,000 = $5.00, the investor gets 1,000,000 shares, and then a pool equal to 20% of the final total is added. Total = 3,000,000 / 0.80 = 3,750,000; founders end at 53.3% and the investor at 26.7%. Investors therefore resist post-money pools, but splitting the increase (part pre, part post) is a legitimate compromise.
How to negotiate the pool
- Build a hiring plan for the period until the next round (12 to 18 months), with a grant size per hire.
- Count what is already available in the existing pool, minus promised grants.
- Propose a pool equal to the plan plus a buffer, not a round number.
- Offer an alternative: accept the investor's pool but raise the pre-money by the value of the excess, or put part of the increase in the post-money.
- Offer protection: if the pool runs out before the next round, the company will increase it with appropriate approvals (an "option budget" rather than a large reserve today).
An 18-month hiring plan (illustrative grants as % of fully diluted, varies by market and salary):
| Role | Count | Grant each | Total |
|---|---|---|---|
| VP Engineering | 1 | 1.25% | 1.25% |
| Senior engineers | 4 | 0.40% | 1.60% |
| Product designer | 1 | 0.30% | 0.30% |
| Head of sales | 1 | 0.75% | 0.75% |
| Early sales and operations hires | 4 | 0.15% | 0.60% |
| Advisors | 2 | 0.25% | 0.50% |
| Buffer for refreshes and surprises | 2.00% | ||
| Total needed | 7.00% |
If 2% remains unallocated in the current pool, the founders can justify a post-closing unissued pool around 7% to 9%, not 20%.
SAFEs and the pool
Under the YC post-money SAFE, the pool increase made in connection with the priced round is excluded from the capitalization used to convert the SAFEs (except for promised options). So the new pool dilutes SAFE holders as well as founders. Under some pre-money SAFEs and notes, the pool increase may be included in the conversion denominator, which lowers the conversion price for the investor and shifts more dilution onto founders. Model both in the SAFE dilution calculator.
Common mistakes
- Negotiating only the headline pre-money and accepting a large pool.
- Not knowing how much of the current pool is already promised in offer letters.
- Counting the pool twice (an existing unissued pool plus a new target that already includes it).
- Forgetting stockholder approval for the plan increase, required for incentive stock options.
- Oversizing early and then granting too generously because the pool "is there".
A sample counter-proposal
"We propose an unissued option pool equal to 9% of the post-closing fully diluted capitalization, based on the attached 18-month hiring plan. If the pool is insufficient before the next financing, the company will propose an increase to the board, and we are open to including part of any further increase in the post-money of this round."
Key takeaways
Treat the pool as part of the price. Compare term sheets on effective pre-money valuation, not headline valuation, and support your proposed pool with a hiring plan. Remember that a larger pool also means more future dilution from grants, so a pool sized to real needs is better for founders and for the investors whose ownership it will also eventually dilute once grants are made.
Frequently asked questions
What is the option pool shuffle?
A term sheet structure in which the option pool is increased before the investment and counted in the pre-money valuation, so the dilution from the new pool falls only on existing stockholders and lowers the effective price per share.
How big should the option pool be at seed?
Big enough for your hiring plan until the next round. Carta's median seed-stage pool is 11.8%; 10% to 15% post-money is common, and 20% is usually more than needed.
What is effective pre-money valuation?
The headline pre-money valuation minus the value of the new pool shares created in the round. It is the valuation the existing holders actually receive.
Can the option pool be increased after the round instead?
Yes, if investors agree. A post-money pool dilutes the new investors too, so they usually resist; a split is a common compromise.
Does the pool count in fully diluted ownership?
Yes, for financing purposes. In an exit waterfall, the unissued pool is ignored and receives nothing.
Who approves an option pool increase?
The board, and the stockholders (needed for incentive stock options and usually required by the plan and the charter).