Vesting
Quick Definition
Vesting is the schedule by which you earn permanent ownership of employer-provided assets, such as 401(k) matching contributions, stock options, restricted stock units (RSUs), or pension benefits. Until you are fully vested, leaving the company means forfeiting some or all of those assets. Your own contributions to a retirement plan are always 100 percent vested immediately, but employer contributions and equity grants typically vest over time.
What It Means
Vesting is how companies keep employees around. Instead of giving you your full compensation on day one, employers spread ownership over several years so that leaving early has a real financial cost. Understanding your vesting schedule is one of the most important things you can do when evaluating a job offer or deciding whether to change jobs, because unvested equity can be worth tens or hundreds of thousands of dollars.
The most common vesting structure in startups and tech companies is four years with a one-year cliff. This means you earn nothing during your first year. On your one-year anniversary, 25 percent of your equity vests at once. After that, the remaining 75 percent vests in equal monthly or quarterly installments over the next three years. If you leave at month 11, you get zero. If you leave at month 13, you keep the 25 percent cliff plus one month of additional vesting.
For 401(k) employer matching contributions, federal law caps how long vesting can take. Under the Employee Retirement Income Security Act (ERISA), plans must use either a three-year cliff schedule (0 percent until year three, then 100 percent) or a six-year graded schedule (20 percent per year starting in year two, reaching 100 percent in year six). Many employers offer faster vesting than the legal maximum, with immediate vesting being increasingly common. According to Vanguard's How America Saves 2026 report, the majority of 401(k) plans now offer immediate or short vesting schedules for employer matches.
Vesting also applies to pensions, where benefits accrue based on years of service. Under SECURE 2.0 and prior pension laws, pension plans must allow vesting at least as fast as a five-year cliff or a seven-year graded schedule.
How It Works
Types of Vesting Schedules
There are three main vesting structures:
1. Immediate vesting: You own 100 percent of the contribution or grant from day one. If you leave the next day, you keep everything. This is common for 401(k) matches at larger companies and for some RSU grants.
2. Cliff vesting: You own 0 percent until a specific date, then 100 percent all at once. The most common cliff is one year for startup equity and three years for 401(k) matches.
| Time | Vested Percentage |
|---|---|
| Month 1-11 | 0% |
| Month 12 | 100% |
3. Graded vesting: Ownership builds in increments over time. The most common graded schedule for 401(k) matches is six-year graded (20 percent per year starting in year two):
| Year | Vested Percentage |
|---|---|
| 1 | 0% |
| 2 | 20% |
| 3 | 40% |
| 4 | 60% |
| 5 | 80% |
| 6 | 100% |
For startup equity, the standard is a hybrid: one-year cliff followed by monthly graded vesting:
| Time | Vested Percentage | Shares Vested (4,000 share grant) |
|---|---|---|
| Month 1-11 | 0% | 0 |
| Month 12 | 25% | 1,000 |
| Month 13 | 25% + 1/36 | 1,083 |
| Month 24 | 50% | 2,000 |
| Month 36 | 75% | 3,000 |
| Month 48 | 100% | 4,000 |
401(k) Vesting Rules
Your own contributions to a 401(k) are always 100 percent vested immediately. You can take them with you whenever you leave. The vesting schedule only applies to employer matching contributions. Federal law sets maximum vesting schedules:
| Schedule Type | Legal Maximum | How It Works |
|---|---|---|
| 3-year cliff | 0% until year 3, then 100% | All or nothing at 3 years |
| 6-year graded | 20% per year, years 2-6 | 20% in year 2, 40% in year 3, etc. |
| 2-year graded | 100% after 2 years | Faster than the legal max |
Many employers offer better terms. According to Vanguard's 2026 data, a growing share of plans offer immediate vesting on employer matches, particularly at larger companies competing for talent.
Stock Options and RSUs
Equity compensation vesting works differently from 401(k) vesting. The key differences:
- Stock options: Vesting gives you the right to exercise (buy) your options at the strike price. You do not own shares until you exercise. About 70 percent of employee grants in venture-backed companies include a one-year cliff, according to Equity Matrix.
- RSUs: Vesting delivers actual shares (or their cash equivalent) to you. On the vesting date, the fair market value of the shares is taxed as ordinary income. There is no exercise decision to make.
- Restricted stock: Shares are issued upfront but subject to a company repurchase right that lapses as vesting occurs. An 83(b) election can be filed within 30 days of grant to tax the shares at grant value rather than vesting value.
Acceleration Provisions
Some equity grants include acceleration clauses that speed up vesting under certain conditions:
- Single-trigger acceleration: Full vesting upon a change of control (acquisition). All unvested shares vest immediately when the company is sold.
- Double-trigger acceleration: Full vesting upon a change of control plus termination without cause within a set period (typically 12 months). This protects employees who are laid off after an acquisition.
- Good leaver / bad leaver: Some companies accelerate vesting for departures due to death, disability, or retirement, while forfeiting all unvested equity for termination for cause.
Real-World Examples
Example 1: The Startup Employee
Sarah joins a startup and receives a grant of 16,000 RSUs vesting over four years with a one-year cliff. The current share price is $10.
| Time | Shares Vested | Value at $10/share | Cumulative Value |
|---|---|---|---|
| Month 12 | 4,000 | $40,000 | $40,000 |
| Month 24 | 8,000 | $80,000 | $80,000 |
| Month 36 | 12,000 | $120,000 | $120,000 |
| Month 48 | 16,000 | $160,000 | $160,000 |
If Sarah leaves at month 18, she keeps the 4,000 shares from the cliff plus about 667 shares from monthly vesting (6 months x 333 shares per month). She forfeits the remaining 11,333 shares. At $10 per share, she walks away with about $46,670 in vested equity and loses about $113,330 in unvested equity.
Example 2: The 401(k) Match with Graded Vesting
Mike's employer uses a six-year graded vesting schedule for 401(k) matching. He contributes 6 percent of his $80,000 salary ($4,800 per year), and the employer matches 50 percent of his contributions up to 6 percent ($2,400 per year). He leaves after four years:
| Year | Employer Match | Vested % | Vested Amount |
|---|---|---|---|
| 1 | $2,400 | 0% | $0 |
| 2 | $2,400 | 20% | $480 |
| 3 | $2,400 | 40% | $960 |
| 4 | $2,400 | 60% | $1,440 |
| Total | $9,600 | $2,880 |
Mike keeps $2,880 of the $9,600 in employer contributions. He forfeits $6,720 by leaving before full vesting. His own $19,200 in contributions are 100 percent vested and go with him. Read our guide on what to do with your 401(k) when you leave a job.
Example 3: The Acquisition Windfall
Tom has 20,000 stock options in a startup, of which only 5,000 are vested. The company is acquired for twice the strike price. His grant includes single-trigger acceleration, so all 20,000 options vest immediately upon the acquisition. He exercises all 20,000 at the $5 strike price and sells at $10 per share:
- Exercise cost: 20,000 x $5 = $100,000
- Sale proceeds: 20,000 x $10 = $200,000
- Profit: $100,000
Without the acceleration clause, Tom would have been able to exercise only his 5,000 vested options, for a profit of $25,000. The acceleration provision was worth $75,000. Read our guide on equity and stock options at work for more on acceleration clauses.
Key Points to Remember
- Your own 401(k) contributions are always 100 percent vested immediately. Vesting schedules apply only to employer contributions and equity grants.
- The standard startup vesting schedule is four years with a one-year cliff: 25 percent vests at month 12, then the rest vests monthly or quarterly.
- For 401(k) matches, federal law caps vesting at three-year cliff or six-year graded. Many employers offer faster schedules.
- RSUs are taxed as ordinary income on the vesting date, based on the fair market value of the shares.
- Stock options give you the right to exercise (buy) shares as they vest. You choose when to exercise and sell.
- Acceleration clauses can vest all unvested equity upon acquisition or acquisition plus termination. These can be worth significant money.
- Leaving a job before full vesting means forfeiting unvested employer contributions and equity.
Common Mistakes to Avoid
- Not understanding your vesting schedule before accepting a job: Equity compensation is only valuable if you stay long enough to vest. A $100,000 equity grant with a four-year vesting schedule is worth $25,000 per year, not $100,000. Read our guide on evaluating a job offer beyond salary.
- Leaving right before a cliff vesting date: If your 401(k) match vests on a three-year cliff and you leave at two years and 11 months, you forfeit the entire match. Waiting one more month could be worth thousands of dollars.
- Forgetting that RSU vesting triggers taxes: When RSUs vest, the full market value is taxed as ordinary income. Many employees are surprised by the tax bill. Set aside cash or sell some shares to cover the tax liability.
- Not filing an 83(b) election for restricted stock: If you receive restricted stock (not RSUs), you have 30 days from the grant date to file an 83(b) election with the IRS. This taxes you on the grant date value (often very low) instead of the vesting date value. Missing this deadline can cost tens of thousands in taxes. Read about the 83(b) election.
- Ignoring acceleration clauses in your offer: Single-trigger or double-trigger acceleration can be worth a large amount if your company is acquired. Negotiate for these clauses when possible.
- Cashing out a 401(k) instead of rolling it over: When you leave a job, you can roll your vested 401(k) balance into an IRA or your new employer's plan. Cashing out triggers income tax plus a 10 percent penalty if you are under 59.5. Read our guide on what to do with your 401(k).
Related Concepts
Vesting applies to several forms of compensation. In a 401(k), employer matching contributions may vest on a cliff or graded schedule. Stock options and RSUs vest over time, giving you ownership of company shares. An ESOP (employee stock ownership plan) also uses vesting schedules. If you receive restricted stock, filing an 83(b) election within 30 days can save significant taxes. Vesting is a key consideration in retirement planning because leaving a job before full vesting reduces your retirement savings. Read our guides on equity and stock options at work, evaluating a job offer beyond salary, and what to do with your 401(k) when you leave a job. Use our 401(k) calculator to project your savings growth.
Frequently Asked Questions
Q: What happens to my unvested 401(k) match when I quit? A: Unvested employer matching contributions are forfeited when you leave. They go back to the plan and may be used to reduce future employer contributions or administrative costs. Your own contributions are always 100 percent vested and go with you. Check your plan's vesting schedule before giving notice to avoid leaving money on the table.
Q: Can my employer take back vested contributions? A: No. Once contributions are vested, they are yours. Your employer cannot revoke vested 401(k) matches or vested equity. However, unvested contributions can be forfeited if you leave before the vesting date.
Q: How are RSUs taxed when they vest? A: When RSUs vest, the fair market value of the shares on the vesting date is taxed as ordinary income. If 1,000 shares vest at $50 per share, you have $50,000 of ordinary income, regardless of whether you sell the shares. Many companies automatically sell a portion of vesting shares to cover the tax withholding. The IRS provides guidance on equity compensation taxation in Publication 525.
Q: Should I exercise my stock options as soon as they vest? A: It depends. If you have incentive stock options (ISOs), exercising early can start the holding period for favorable long-term capital gains treatment, but it may trigger the alternative minimum tax (AMT). If you have non-qualified stock options (NSOs), exercising creates an immediate tax liability. Many employees wait until a liquidity event (IPO or acquisition) to exercise. Consult a tax advisor before exercising.
Q: What is the difference between a one-year cliff and a three-year cliff? A: A one-year cliff means 25 percent of your equity vests at month 12, with the rest vesting monthly over the remaining three years. This is standard for startup equity. A three-year cliff means 0 percent vests until your third anniversary, then 100 percent vests at once. This is the legal maximum for 401(k) employer match vesting. The three-year cliff is much riskier for employees because leaving at two years and 11 months means forfeiting everything.
