Stock options are how most startups pay people they can't yet afford to pay in cash. Done well, they align your team with the outcome you're building toward. Done carelessly, they create tax problems, a messy cap table, and some hard conversations two years from now.
Here's what options are, why startups issue them, what they genuinely cost you, and the mistakes that are expensive to unwind.
What a stock option actually is
A stock option is the right to buy a set number of shares at a fixed price at some point in the future. It is not stock. It's the option to purchase stock later, once it's been earned.
Three pieces matter:
- Strike price. What your employee pays per share. For a private company this needs to be set at or above fair market value on the grant date — which is why startups get a 409A valuation before granting.
- Vesting. How the right is earned over time. The market standard is four years with a one-year cliff: nothing vests until month twelve, then it vests monthly.
- Exercise. Actually buying the shares. The employee writes a check for the strike price times the number of shares.
The value to your employee is the spread — what the shares are worth minus what they paid for them.
Eight reasons startups issue stock options
1. Ownership changes how people work
Someone holding equity in the outcome behaves differently from someone drawing a salary. It isn't magic and it doesn't fix a bad culture, but a team with a real stake tends to make decisions with a longer horizon.
2. You can hire above your cash budget
Options let you compete for people whose market salary you can't currently pay. That's the whole reason equity compensation exists at the early stage.
3. They conserve cash
Every dollar of compensation delivered as equity is a dollar that stays in the bank. Options don't raise capital — they extend the capital you already have, which at pre-revenue is often the more useful thing.
4. They retain the people you can least afford to lose
Vesting is a retention mechanism. A key engineer eighteen months into a four-year schedule has a concrete reason to see the next eighteen through.
5. The upside is real
If the company's value grows, the spread between strike price and share value becomes genuine money for the people who built it. That's the promise, and it's worth making honestly rather than overselling.
6. They're a long-term incentive by design
Unlike a cash bonus that's spent in a month, options vest over years and pay out on an event that may be further out still. That structure is the point.
7. Investors expect a pool
Institutional investors expect to see an option pool on your cap table. Arriving at a term sheet without one usually means creating it as part of the round — and typically at the existing shareholders' expense rather than the new investor's.
8. They're table stakes for startup talent
Experienced startup hires expect equity. A package without it reads as either inexperienced or not serious, both of which cost you candidates.
What stock options actually cost you
Here's the part that often gets skipped: options dilute you. Every option that's exercised becomes a new share. The share count grows, and every existing holder — you included — owns a smaller percentage of the company than before.
That's not an argument against issuing options. It's the trade you're making: a smaller slice of what you hope is a much larger pie. But it should be a decision, not a surprise, and it's the reason pool sizing deserves real thought rather than a number copied from a template.
There's an administrative cost too — 409A valuations need refreshing, typically annually or after a material event, and a cap table with dozens of option holders needs actual maintenance.
ISOs vs. NSOs
Two types, and the difference matters more than founders expect.
- Incentive stock options (ISOs) can only go to employees. They carry no ordinary income tax at exercise, though the spread can trigger alternative minimum tax. If the holder meets the holding periods — more than a year after exercise and more than two years after grant — the gain can be taxed as long-term capital gain. There's also a limit on how much can first become exercisable in any year.
- Non-qualified stock options (NSOs) can go to anyone: contractors, advisors, board members. The spread is taxed as ordinary income at exercise, with withholding obligations for the company.
Founders routinely promise "options" to an advisor and assume they'll be ISOs. They can't be. Getting the type right at grant is much easier than fixing it afterward.
How big should your option pool be?
Most early-stage companies set aside somewhere between 10% and 20% of fully diluted shares. The right number depends on how many people you plan to hire before the next round and how senior they are — a pool sized for four junior hires won't cover a VP.
Worth knowing before you negotiate: investors frequently require the pool to be created or topped up pre-money, meaning the dilution lands on existing shareholders rather than being shared with the incoming investor. It's a negotiable term, and it's easier to negotiate when you saw it coming.
Four things founders get wrong
1. Granting before a 409A valuation
Setting a strike price below fair market value creates tax exposure for the recipient. The valuation exists to give you a defensible number.
2. Missing the 83(b) window
Where an 83(b) election applies — restricted stock, or early-exercised options subject to vesting — it must be filed with the IRS within 30 days. The deadline is unforgiving, and missing it is one of the more painful avoidable mistakes in startup equity.
3. Ignoring the post-termination exercise window
Standard plans give a departing employee 90 days to exercise or forfeit. For someone who'd need to find real cash to exercise, that can mean walking away from everything they vested. Some companies extend the window. Either way, decide deliberately and tell people.
4. Promising percentages instead of share counts
"One percent of the company" means something different after the next round. Grants are share counts against a stated fully diluted total. Say it that way in writing from the start.
Common questions
When should we set up an option pool?
Usually at incorporation or shortly after, before your first hires. Creating it early means the mechanics exist when you need to move quickly on a candidate. We handle this as part of Delaware incorporation.
Can we give options to contractors and advisors?
Yes, as NSOs. ISOs are limited to employees.
What happens to options if we're acquired?
It depends on the deal. Options may be assumed by the buyer, cashed out for the spread, or cancelled. Unvested options may accelerate if the grant or plan includes acceleration on a change of control. This is one of the terms most worth understanding before you sign a plan document, not during a transaction.
Do options affect our funding round?
Yes — pool size is part of the cap table investors diligence, and pool expansion is a standard term sheet negotiation. More on that in funding round support.
Getting it right the first time
Equity is one of the few early decisions that's genuinely expensive to unwind. Clean grants, a defensible 409A, and a properly sized pool cost far less to set up than they do to fix during diligence.
If you're setting up an option pool or issuing your first grants, get in touch — we'll tell you what it costs and how long it takes before you commit to anything.
This post is general information, not legal or tax advice, and reading it doesn't create an attorney-client relationship. Equity and tax outcomes depend on your specific facts — talk to a lawyer and an accountant before acting on any of it.
