A vesting rule that requires someone to stay a minimum time before earning any equity. The standard cliff is one year. If someone leaves before the cliff, they get nothing.
cliff
/klɪf/ noun — In equity compensation, a minimum period of service required before any ownership rights begin to accrue. Derived from the visual metaphor of a sharp drop: before the cliff date, ownership is zero; after it, a significant portion vests at once.
Why it matters
The cliff protects your company from someone leaving early with unearned equity. Without it, a co-founder who quits after one month still owns shares. That creates dead equity that sits on your cap table indefinitely and makes everything harder.
Investors care about cliffs too. A cap table with equity held by people who left months into the journey is a red flag in due diligence. It signals that the founding team didn't protect itself, and it dilutes the ownership of the people who actually stayed to build the company.
How it works
The standard cliff is one year. During that year, no equity vests at all. On the one-year anniversary, 25% of the total grant vests at once. After that, the remaining 75% vests monthly over three years.
If someone leaves before the cliff, they get nothing. This simple mechanism prevents dead equity from short-tenure contributors.
For example, if you grant someone 10,000 shares with a one-year cliff, they own zero shares at month 11. At month 12, they suddenly own 2,500 shares, and then roughly 208 shares vest each month after that.
| Time | What happens | Shares owned |
|---|---|---|
| Month 1-11 | Cliff period — nothing vests | 0 |
| Month 12 | Cliff hit — 25% vests at once | 2,500 |
| Month 24 | Monthly vesting continues | 5,000 |
| Month 36 | Monthly vesting continues | 7,500 |
| Month 48 | Fully vested | 10,000 |
History and origin
Cliff vesting emerged from Silicon Valley in the 1980s and 1990s as stock options became a standard part of tech compensation. Early startup employees were receiving equity grants but sometimes leaving after just a few months, retaining ownership that didn't reflect their contribution.
The one-year cliff became the industry standard through venture capital term sheets. Firms like Sequoia and Kleiner Perkins began requiring founder vesting with cliffs as a condition of investment, recognizing that co-founder departures were one of the top reasons startups failed.
Today, the "4-year vesting with 1-year cliff" structure is so universal that Y Combinator includes it in their standard post-investment documents, and most startup attorneys consider it non-negotiable for venture-backed companies.
Common cliff variations
| Type | Cliff length | Typically used for |
|---|---|---|
| Standard | 12 months | Co-founders and early employees |
| Short cliff | 3-6 months | Advisors, or founders who worked together pre-incorporation |
| No cliff | 0 months | Experienced advisors with short engagements |
| Extended cliff | 18-24 months | Rare; sometimes used for high-equity grants with significant risk |
Frequently asked questions
What is a cliff in equity vesting?
A cliff is a waiting period before any equity vests. The standard cliff is one year. If someone leaves before the cliff date, they receive zero equity. After the cliff, a chunk of equity (typically 25%) vests immediately, and the rest vests gradually over the remaining schedule.
Why do startups use a one-year cliff?
Startups use a one-year cliff to protect against early departures. Co-founder conflicts and misaligned expectations usually surface within the first year. The cliff ensures that someone who leaves after a few months doesn't walk away with equity they haven't earned, which would create dead equity on the cap table.
Can I negotiate a shorter cliff period?
Yes. Some founders negotiate 6-month or even 3-month cliffs, especially if they've been working together informally before incorporating. However, most VCs and experienced startup attorneys recommend a full one-year cliff because most co-founder problems surface in the first year.
What happens to unvested equity after the cliff?
After the cliff, equity typically vests monthly or quarterly over the remaining schedule (usually 3 more years for a 4-year total). If someone leaves after the cliff but before fully vesting, they keep whatever has vested and forfeit the rest. The unvested shares return to the company.
Do advisors have the same cliff as co-founders?
No. Advisor cliffs are typically shorter — 3 months or no cliff at all — because advisor relationships are lighter commitments. Advisors usually vest over 1-2 years with smaller equity grants (0.25% to 1%), so a one-year cliff would mean they earn nothing for most of the relationship. See our guide on how much equity to give advisors.
Is a cliff required by investors?
Nearly all institutional investors require founder vesting with a one-year cliff as a condition of investment. They've seen too many situations where a founder departs early and retains a large stake. If you're planning to raise venture capital, implementing a cliff from the start is expected.
What is the difference between a cliff and vesting?
Vesting is the overall schedule by which equity is earned over time. The cliff is a specific rule within the vesting schedule — it's the initial waiting period before any vesting begins. A typical structure is "4-year vesting with a 1-year cliff," meaning the total vesting period is 4 years, but nothing vests until after the first year.
Learn more
- Vesting explained: cliffs, acceleration, and the schedule that protects everyone
- Vesting schedules explained: cliff, graded, and the 4-year standard
- Dead equity: the silent killer of startups
- How much equity should you give startup advisors?
Related terms
Ready to get your equity right?
Equity Matrix tracks contributions and calculates ownership automatically — with cliff protection built in.
Get Started Free