Most founders set up their ESOP wrong — wrong pool size, wrong vesting defaults, no 409A in place when the first hire signs an offer. The fixes are easy if you do them upfront and painfully expensive if you do them later.
Set the right pool size
The pool comes out of the founder cap table, not the investors' share. That means oversizing it dilutes you for nothing; undersizing it forces a refresh at every round, which dilutes you even more.
- Pre-seed: 5-10% pool. Enough for 5-10 early hires.
- Seed: 10-15% pool. Topped up at Series A.
- Series A: 12-17% pool. The "standard refresh" most term sheets require.
- Series B+: Topped up to maintain 10-12% available pool.
Use our Cap Table Simulator to model what each refresh costs founders. Many founders are surprised that "standard" 10% post-money pool refreshes can cost them 4-6 percentage points of personal ownership at every round.
Get a 409A before your first grant
A 409A valuation determines the fair market value (FMV) of your common stock — which sets the strike price for options. Without one, the IRS defaults to a higher value, and your employees can owe taxes on the spread between strike and "real" FMV at grant.
Three rules:
- Get a 409A before granting your first option.
- Refresh the 409A annually, or after any material event (priced round, large customer contract, M&A discussion).
- Always grant options at the current 409A strike price — no exceptions.
Standardize the vesting terms
4-year vest, 1-year cliff is the dominant default for two good reasons:
- The cliff filters out hires who leave in the first year (the worst-case retention scenario for an early company).
- 4 years is enough time for material company outcomes to develop without locking employees in past their meaningful contribution window.
Don't customize vesting per hire unless there's a specific reason. Custom terms mean more bookkeeping, more confusion, and more "but they got X" conversations later.
Pick a cap table tool early
Spreadsheet cap tables work for the first 3-5 grants. Beyond that, errors compound: missed cliffs, wrong strike prices, options granted without board approvals. Move to a real tool early.
Common options:
- Carta — most common, full-featured, more expensive.
- Pulley — newer, cleaner UX, good for early-stage.
- AngelList — works well if you're already on their stack.
- Shareworks (Morgan Stanley) — used by larger companies and at IPO.
Switching tools later is annoying but not impossible. Picking early-stage tools that scale matters more than picking the perfect one on day one.
Grant options through the board
Options must be approved by the board (or, before you have a board, the founders acting as the board). Every grant needs:
- Recipient name and grant amount.
- Strike price (the current 409A FMV).
- Grant date and vesting schedule.
- Board resolution authorizing the grant.
Skipping the board resolution is technically invalid and creates problems at diligence. Your cap table tool handles most of this if you set it up correctly.
Document the policy publicly
Once you have 5+ employees, write down your equity bands by role and seniority. Sharing them internally:
- Reduces "but X got Y" arguments — there's a published rationale.
- Makes negotiations cleaner — candidates know the bands.
- Forces you to think clearly about how equity scales with role.
See our offer letters guide for typical equity bands by role and stage.
Common ESOP mistakes
- Granting options without a 409A. Creates immediate IRS exposure.
- Pool oversizing. Diluting yourself for nothing because investors didn't push back.
- Missing the cliff cleanup. Employees who leave before the cliff don't vest — but their grants stay on the cap table until you formally cancel them.
- No PTE policy. 90-day post-termination exercise is harsh; people lose meaningful equity. Decide your policy intentionally.
- Late-stage equity refresh ignored. Series B+ companies that don't refresh longtime employees lose their best people to competitors offering fresh grants.
Pair this guide with our stock options calculator to model what a typical grant means in dollar terms, and the cap table simulator to see how the pool flows through future rounds.