Business

Vesting Schedule Calculator

Calculate your equity vesting schedule with cliff periods. See how many shares have vested, monthly vesting amounts, and a full timeline.

Quick Answer

Standard 4-year vesting with 1-year cliff: 25% vests at month 12, then ~2.08% per month for 36 more months. A 10,000-share grant vests 2,500 shares at the cliff, then ~208 shares/month.

Calculate Your Vesting Schedule

Enter your grant details to see your vesting timeline.

Disclaimer: This calculator provides a simplified vesting schedule estimate. Actual vesting terms are governed by your equity agreement, company stock plan, and applicable laws. Tax implications (including 83(b) elections, AMT, and capital gains) are not considered here. Consult a qualified financial advisor or tax professional for personalized guidance. This tool is for educational purposes only.

About This Tool

The Vesting Schedule Calculator helps employees, founders, and advisors understand how equity grants vest over time. Enter your total shares or options, vesting period, cliff length, and start date to see a complete month-by-month breakdown of vested and unvested shares, including your current vesting status based on today's date.

Why Vesting Schedules Exist

Vesting schedules serve a critical purpose in aligning long-term incentives between companies and their team members. Without vesting, an employee could join a startup, receive a large equity grant, and immediately leave with full ownership. Vesting ensures that equity is earned gradually over time, rewarding continued contribution and commitment. For startups, this is particularly important because equity is often a significant portion of total compensation, and the company needs assurance that recipients will stay and help build value. Vesting also protects co-founders from each other: if one founder departs early, their unvested shares return to the company rather than being retained by someone who is no longer contributing.

The Standard Four-Year Schedule

The four-year vesting schedule with a one-year cliff has become the industry standard in technology startups, though it originated in Silicon Valley decades ago. Under this structure, nothing vests during the first year (the cliff period). On the first anniversary of the grant date, exactly 25% of the total shares vest all at once. After that, the remaining 75% vests in equal monthly installments over the next 36 months, with each monthly increment representing approximately 2.08% of the total grant. This structure means that after two years, 50% has vested; after three years, 75%; and after four years, the grant is fully vested. Some companies vary this structure with three-year schedules, longer cliffs, or quarterly instead of monthly vesting.

Understanding the Cliff

The cliff is perhaps the most misunderstood element of vesting schedules. A one-year cliff means that if you leave the company before completing one full year of service, you receive zero shares from your grant. This protects the company from granting equity to very short-term employees. Once you pass the cliff, a significant block of shares vests immediately (typically 25% on a four-year schedule), and then vesting continues monthly. The cliff creates a meaningful retention incentive during the critical first year of employment. For advisors, shorter cliffs of three to six months are common, reflecting the different nature of advisory relationships.

Tax Implications of Vesting

Vesting has significant tax implications that vary based on the type of equity (stock options vs RSUs vs restricted stock) and your jurisdiction. For restricted stock, you may want to file an 83(b) election within 30 days of your grant to be taxed on the value at grant rather than at vesting, which can save substantial taxes if the stock appreciates. For ISOs (Incentive Stock Options), you owe no regular income tax at exercise but may trigger AMT (Alternative Minimum Tax). For NSOs (Non-Qualified Stock Options) and RSUs, vesting or exercise triggers ordinary income tax. Understanding these nuances is crucial for optimizing your equity compensation, and this calculator focuses on the schedule mechanics while recommending you consult a tax professional for tax planning.

Frequently Asked Questions

What is a standard vesting schedule?
The most common vesting schedule in the startup world is a four-year vesting period with a one-year cliff. Under this structure, no shares vest during the first 12 months. At the one-year mark (the cliff), 25% of the total grant vests all at once. After that, the remaining 75% vests monthly in equal increments over the next 36 months. This schedule was popularized by Silicon Valley startups and has become the de facto standard for both employee stock options and restricted stock grants.
What is a cliff in vesting?
A cliff is a minimum period of service required before any shares vest. The most common cliff is 12 months (one year). If an employee leaves before the cliff date, they forfeit all unvested shares and receive nothing from their equity grant. The cliff exists to protect companies from granting equity to employees who leave very early. After the cliff, a large block of shares (typically 25% of the total grant with a one-year cliff on a four-year schedule) vests all at once, and subsequent vesting occurs monthly.
How does monthly vesting work after the cliff?
After the cliff period passes and the initial block of shares vests, the remaining shares vest in equal monthly installments. On a standard four-year schedule with a one-year cliff, 25% vests at the cliff, and then 1/48th of the total grant (approximately 2.08%) vests each month for the remaining 36 months. Some companies use quarterly vesting instead of monthly, which means shares vest in larger blocks every three months. Monthly vesting is more common and is generally more favorable for employees.
What happens to unvested shares if I leave?
Unvested shares are typically forfeited when you leave the company, regardless of the reason. If you are terminated, resign, or are laid off before your shares fully vest, the company retains the unvested portion. For stock options specifically, you usually have a post-termination exercise window (commonly 90 days, though some companies offer longer periods) to exercise any vested options. After that window closes, vested but unexercised options are also forfeited. Some companies offer acceleration clauses that vest some or all shares upon termination, acquisition, or other triggering events.
What is accelerated vesting?
Accelerated vesting is a provision that causes unvested shares to vest faster than the original schedule under certain conditions. Single-trigger acceleration vests shares upon a single event, typically a change of control like an acquisition. Double-trigger acceleration requires two events, usually a change of control plus termination of the employee within a specified period afterward. Double-trigger is more common for employees, while single-trigger is sometimes negotiated by founders and executives. Acceleration protections are important because acquiring companies often want to re-vest employees on their own schedule.
How is vesting different for founders vs employees?
Founders often receive their shares upfront (through a stock purchase agreement) but subject them to a vesting schedule with a repurchase right. If a founder leaves early, the company can repurchase unvested shares at cost. This is called reverse vesting. Employees typically receive stock options or RSUs that vest over time. Founders may negotiate shorter vesting periods, accelerated vesting on acquisition, or credit for time already worked before formalizing the vesting agreement. Some founding teams use three-year vesting with no cliff or a six-month cliff instead of the standard four-year/one-year structure.

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