Founder Equity & Vesting: Getting the Split Right

Equity splits and vesting schedules are among the most consequential decisions you'll make as a founder. Get them wrong, and you've planted a time bomb in your company's foundation.

The Equity Split

Equal vs. Unequal Splits

There's no universally correct answer, but consider:

• Equal splits work when contributions, commitment, and risk are truly equal
• Unequal splits should reflect meaningful differences in contribution
• The key question: "Would this split feel fair in 3 years?"

Factors to Consider

• Who originated the idea?
• Who is committing full-time first?
• Who is bringing existing IP or technology?
• Who has more relevant experience?
• Who is taking more financial risk?

Why Vesting is Non-Negotiable

Vesting protects every founder from a nightmare scenario: a co-founder leaving early with a large equity stake.

Standard Vesting Schedule

• 4-year vesting with a 1-year cliff
• After the cliff: 25% vests immediately
• Remaining 75%: vests monthly or quarterly over 3 years
• This is nearly universal and investors expect it

What Happens Without Vesting?

• Co-founder leaves after 3 months with 40% of the company
• Remaining founders can't reclaim the equity
• Future investors see a red flag on the cap table
• The departed founder becomes a permanent drag on the company

Acceleration Clauses

Single Trigger

• All remaining unvested shares vest immediately upon certain events (typically an acquisition)
• Controversial — most investors prefer double trigger

Double Trigger

• Requires TWO events for acceleration (e.g., acquisition + termination)
• More investor-friendly and generally recommended

Common Mistakes

1. No vesting at all — the #1 avoidable startup killer

2. Handshake agreements instead of legal documents

3. Not filing 83(b) elections within 30 days (US tax critical)

4. Ignoring future dilution from employee option pools and fundraising

5. 50/50 splits with no tie-breaking mechanism for decisions

How Lexium Helps

We structure founder equity with precision — designing vesting schedules, acceleration clauses, and governance mechanisms that protect all founders while keeping the company investment-ready. Our framework ensures these critical decisions are made with full understanding of their long-term implications.