Stock options are how startups attract and retain talent. An employee stock option pool is a block of shares reserved for future grants to employees, advisors, and sometimes consultants. Getting the pool size right — and understanding how it affects your ownership — is one of the most impactful decisions you will make as a founder.
What Is an Option Pool?
An option pool is a set of shares reserved from the company's authorized shares for future equity compensation grants. These shares are not issued to anyone yet — they are set aside so the company can grant stock options (or restricted stock units) to employees over time.
The pool is governed by an equity incentive plan approved by the board. Individual grants are made from the pool as employees are hired or promoted, typically subject to a four-year vesting schedule with a one-year cliff.
How Big Should Your Option Pool Be?
There is no single right answer, but there are useful benchmarks. At incorporation, most startups create an initial pool of 10-15% of fully diluted shares. At Series A, investors typically require the pool to be 10-20% of fully diluted shares, with 15% being the most common target.
The right pool size depends on your hiring plan between now and your next fundraise. The goal is to have enough options to hire the people you need without having to create a new pool (which requires board approval and further dilution). Map out your planned hires with estimated equity grants for each role, and size the pool accordingly.
Common equity grant ranges by role at a Series A stage company: VP/C-level hires typically receive 1-2% of fully diluted equity, directors receive 0.25-0.5%, senior engineers receive 0.1-0.25%, and junior hires receive 0.01-0.05%. These ranges vary significantly by market, stage, and geography.
The Option Pool Shuffle — How Pools Dilute Founders at Series A
This is the most misunderstood mechanic in startup fundraising. When a Series A investor includes an option pool expansion in the term sheet, the pool is typically created from the pre-money valuation. This means the dilution from the pool falls entirely on existing shareholders — founders and seed investors — not on the new Series A investor.
In practice, a 15% option pool expansion on a $10M pre-money valuation reduces the effective pre-money valuation for existing shareholders by 15%. The investor gets their stated ownership percentage calculated after the pool has already been carved out.
This is not unfair — it is standard — but founders should understand it before signing. The pool size is negotiable. If you have already made key hires, argue for a smaller pool. If the investor's proposed pool is larger than your hiring plan requires, push back with a specific hiring plan that justifies a smaller reserve.
409A Valuations — Why You Need One Before Granting Options
Before issuing any stock options, your company needs a 409A valuation. Named after Section 409A of the Internal Revenue Code, this is an independent appraisal of the fair market value (FMV) of the company's common stock.
Stock options must be granted at or above FMV to avoid severe tax consequences for employees. If options are granted below FMV ("discounted options"), employees face immediate income tax on the spread plus a 20% IRS penalty tax — and potentially additional state penalties.
You need a new 409A valuation at incorporation (if granting options immediately), after every priced funding round, after any material event that changes the company's value, and at least annually. The cost for a 409A valuation ranges from approximately $1,000 to $10,000+ depending on company complexity. DealCycl supports 409A package export, providing your valuation firm with the data they need in the format they require.
Managing Options on Your Cap Table
Track every option grant with the following details: grant date, number of shares, exercise price, vesting schedule (start date, cliff date, full vesting date), and grant type (ISO vs. NSO). Also track exercises, forfeitures, and cancellations. Your available pool — the number of ungranted shares remaining — determines how many more options you can grant before needing board approval for a pool expansion.
This is one area where a spreadsheet fails fast. A proper cap table platform automates vesting calculations, tracks available pool shares, and generates the reports needed for 409A valuations and board reporting.
Explore DealCycl Company → | Read: Cap Table 101 | Read: Exit Waterfalls