A vesting cliff is a date before which you earn none of your promised equity — with the common 1-year cliff, leaving on day 364 generally means walking away with zero shares, while staying through day 365 typically vests 25% at once. Your offer letter's "vesting over 4 years with a 1-year cliff" is doing a lot of work, and most of it isn't obvious until the dates start mattering. The exact terms live in your grant agreement and equity plan, so the specifics depend on your situation.
What is a vesting cliff?
Vesting is the process of earning the equity you were promised. Most plans don't hand you the shares on day one — they're a future promise that generally converts to ownership on a schedule.
A cliff is a date before which you typically get nothing. The most common pattern is a 1-year cliff: leave on day 364 and you generally walk away with zero shares. Stay through day 365 and many plans vest 25% of the grant at once (1 year out of 4).
After the cliff, shares typically vest monthly or quarterly until the full grant is delivered — usually over a total of 4 years. Your specific plan and grant agreement may differ.
Why does the cliff exist?
Cliffs protect the company from someone joining, getting a grant, and leaving within a few months. They also give the company a clean "did this hire work out" decision point at the one-year mark.
For you, the cliff creates a real financial cost to leaving early — and a real reason many people weigh their start date carefully when they're between offers.
When does the cliff matter most?
- You're considering leaving within 12 months of starting. Many people try to wait past the cliff if they can; the difference is often tens of thousands of dollars.
- You're being recruited away. Many people find it helps when the new offer includes a sign-on bonus or accelerated grant that compensates for the unvested equity they're leaving behind.
- The company gets acquired before your cliff. Acquisition terms sometimes accelerate vesting — sometimes they don't. See our guide on acquisitions and equity for details.
When does the cliff matter less?
- You're well past it (year 2+) and shares are vesting monthly.
- The equity is a small share of your total comp and the new opportunity is materially better.
- The company's outlook has changed and the unvested shares are unlikely to be worth much.
What should you ask HR or a recruiter?
- What is my exact cliff date, and is it calendar-based or based on hours worked?
- Does the grant have double-trigger acceleration in the event of acquisition? (See acquisition guide.)
- If I'm laid off before the cliff, is there any pro-rated vesting?
- Is there a refresh grant schedule after the initial 4 years?
The SEC has a plain-language overview of equity compensation basics — SEC investor education on employee stock options (affiliate link — OffbookHR may earn a commission if you buy through this link. It does not affect ranking.). Equity compensation also carries tax consequences that depend heavily on the option type and your situation; the IRS lays out the general treatment of statutory and nonstatutory options in IRS Tax Topic 427 (Stock Options) (affiliate link — OffbookHR may earn a commission if you buy through this link. It does not affect ranking.). Because these rules and figures can change, many people confirm the current details at the source.