Employee Option Pools: Sizing and Strike Price Strategy
Most founders undersiz their option pools and regret it during Series A fundraising. Investors will demand you have enough equity to recruit great engineers. Get the pool size right from the beginning.
You're raising Series A. Investors ask: "What's your option pool size?" You say "15%." They say "That's too small. You need 20% to attract engineers. You'll have to expand, which dilutes everyone."
Now you're stuck. You can either dilute your existing cap table (founders and early investors), or you can't recruit engineers. Both are bad.
The option pool is the equity reserved for employees. It's how you recruit, retain, and align your team. Get the size right, and hiring becomes easier. Get it wrong, and you're paying cash for people you wanted to attract with equity.
Option Pool as Talent Currency
The option pool is how you compete for talent against bigger companies. Great engineers want upside, not just salary. A generous option pool makes your offer more compelling.
How Big Should Your Option Pool Be?
It depends on your stage:
Seed Stage
Recommended pool: 10-15% of fully diluted shares
Why: You're hiring a small team. You don't need a huge pool yet. But you want enough to recruit your first engineers.
Example: You issue 1,000,000 shares to founders. 10% pool = 111,111 option shares reserved (10,000,000 ÷ 1.10).
Series A
Recommended pool: 15-20% of fully diluted shares
Why: You're scaling the team. Investors will expect you to have enough equity to recruit strong talent. This is table stakes.
Note: Many Series A investors will require you to expand the pool to 20% as a condition of funding. Plan for this.
Series B+
Recommended pool: 15-25% of fully diluted shares
Why: You're building a real company. You need equity to attract VPs, directors, and specialists. The pool continues to grow with the company.
Practice: Many companies carve out a 5-10% pool specifically for future hires, separate from the general option pool.
Investor Expectations
Series A investors typically want to see 20% pool by the time they invest. If you only have 10%, you'll either need to expand (diluting everyone) or face tough negotiation. Plan ahead.
409A Valuations and Strike Price
Your 409A valuation is the fair market value of your company, set by an independent appraiser. This determines the strike price (exercise price) for options.
How It Works
Example:
- 409A valuation: $5M (fair market value per IRS)
- Total shares outstanding: 1,000,000
- Per-share value: $5 per share
- Option strike price: $5 per share
- Employee gets 10,000 options with $5 strike
Why It Matters: Tax Implications
If strike price is correct (matches 409A valuation): No tax on grant. Employee only pays taxes when they exercise.
If strike price is too low (below 409A): The difference is immediate income to the employee. Bad: they owe taxes on grant with no liquid stock.
Example: 409A is $5, but you grant options at $2 strike. Employee owes taxes on $3/share × 10,000 shares = $30K in income tax, even though they haven't sold anything.
When to Update 409A
- Every 12 months: Update annually to reflect current company value
- After major funding round: Series A/B changes your valuation significantly
- Material acquisition: If you acquire a company or make a major change in business model
- Before large option grants: Don't grant options without a recent 409A—you risk penalties
409A Penalties Are Real
If you grant options at a strike price below the 409A valuation, employees face immediate tax liability. This makes them angry and can trigger legal disputes. Get the 409A done right.
ISO vs NSO: Tax Differences for Employees
Two types of options:
ISO (Incentive Stock Options)
Tax treatment: No tax on grant or exercise. Only pay taxes when you sell the stock (long-term capital gains rate, usually 15-20%).
Catch: You can only use ISOs if you meet IRS requirements. Strike price must equal FMV at grant. You must hold for 1 year after exercise and 2 years after grant.
Limit: Only eligible employees (typically not directors, consultants, or non-US employees).
Bottom line: ISOs are better for employees (lower tax). Always use ISOs first.
NSO (Non-Qualified Stock Options)
Tax treatment: No tax on grant. When exercised, employee pays ordinary income tax on the spread (difference between strike and current FMV). When sold, they pay capital gains.
Used for: Directors, consultants, non-US employees, amounts exceeding ISO limits ($100K per year).
Bottom line: Less favorable tax treatment, but available to anyone.
| Factor | ISO | NSO |
|---|---|---|
| Tax on exercise | None | Ordinary income on spread |
| Tax on sale | Long-term cap gains (15-20%) | Short or long-term cap gains |
| Who eligible | Only employees | Anyone (including consultants) |
| Annual limit | $100K/year | Unlimited |
Common Option Pool Mistakes
Mistake #1: Pool Too Small
You create a 10% pool at seed. By Series A, you've granted most of it to early hires. Now you need more equity for new hires but have none. Series A investors force you to expand, diluting everyone.
Mistake #2: No 409A Valuation
You start granting options without a 409A. When you finally get one done at $10M valuation, employees realize their $2/share strike was way too low. They owe taxes on the gap with no liquid stock.
Mistake #3: Using NSO for Everyone
You grant NSOs to all employees because it's simpler. Employees realize they owe taxes on exercise and are unhappy. You lose recruiting power.
Mistake #4: Not Communicating Pool Value
You grant options but never explain what they're worth or how they vest. Employees don't understand the upside and don't feel motivated by equity.
Option Pool Implementation Checklist
Determine Pool Size
Use stage-based guidance: 10% seed, 15-20% Series A, 20-25% Series B. Plan 6 months ahead for Series A expansion.
Get 409A Done Annually
Hire a firm like Carta or Pulley for 409A valuations. Cost: $3-5K. Do this before major funding rounds.
Grant ISOs to Employees
Use ISOs for employees up to $100K/year. Use NSOs for additional grants, consultants, and non-US people.
Communicate Value
Show employees what their options are worth at various exit scenarios. Explain vesting and tax implications.
Seed Stage
10-15% pool
Hire first 5-10 employees
Series A
15-20% pool
Scale to 20-50 employees
Series B+
10-15% pool
Ongoing hiring, promotions
Need help sizing your option pool?
Option pool strategy is a critical part of cap table design. At Eagle Rock CFO, we help you right-size the pool, get 409A valuations done on time, and communicate equity value to your team.