Vesting

Vesting is a waiting mechanism employers attach to benefits they grant but don't want to hand over unconditionally. A vesting schedule states when ownership transfers for good. The two basic shapes are cliff vesting, where nothing is yours until a date when everything (or the first large chunk) arrives at once, and graded vesting, where ownership accrues in installments, such as 20% per year. The concept spans two different worlds that are easy to conflate: employer contributions to retirement plans, where federal law limits how slow a schedule can be, and equity compensation, where schedules are set by contract and can include conditions beyond the calendar.

In a 401(k), your own salary deferrals and their earnings are always fully vested. Employer money (matching and profit-sharing contributions) may vest on a schedule, but federal law caps the wait at a three-year cliff or a six-year graded schedule, and some plan designs, including many safe-harbor matches, must vest faster or immediately. Leave before vesting and the unvested employer money is forfeited back to the plan.

Equity vesting is pure contract. The classic startup schedule is four years with a one-year cliff: 25% vests at the one-year mark, then the rest monthly or quarterly. Public-company RSUs usually vest on time alone. Private-company RSUs often use double-trigger vesting, requiring both the passage of time and a liquidity event such as an IPO or acquisition before shares are delivered, which protects employees from owing tax on shares they cannot sell. Departure rules differ by instrument: unvested RSUs and matches are forfeited, while vested stock options typically face a post-termination exercise window (often around 90 days, per the grant agreement) before they expire. Anyone weighing an offer, a counteroffer, or a resignation date should read the schedule and the plan document first; an advice-only planner can translate the fine print into dollars before you sign.

Two hypothetical employees each have $10,000 of employer 401(k) matching contributions and leave after exactly two years of service. Company A uses a three-year cliff: nothing has vested, so the departing employee forfeits the full $10,000. Company B uses a six-year graded schedule that vests 20% per year starting after the second year of service: this employee is 20% vested, keeps $2,000, and forfeits $8,000. Same dollars promised, very different dollars kept.

The same math drives equity. On a four-year grant of 4,800 RSUs with a one-year cliff and monthly vesting thereafter, leaving at month 11 means zero shares; leaving at month 13 means 1,200 shares from the cliff plus 100 more for the extra month. Reading your own plan's exact schedule beats every rule of thumb. All figures are illustrative.

Pros (what vesting does for you)

• Once vested, benefits are legally yours regardless of how or why you leave.
• Graded schedules give partial credit for partial tenure rather than all-or-nothing outcomes.
• Double-trigger RSU designs prevent tax bills on private shares you cannot sell.
• Published schedules make the value of staying, or the cost of leaving, calculable rather than vague.

Cons (what to watch)

• Unvested amounts vanish when you leave, so "total compensation" figures that include unvested grants overstate what you actually hold.
• Cliff schedules create harsh outcomes for near-miss departures and can anchor people to jobs that no longer fit ("golden handcuffs").
• Post-termination option windows are short, and exercising can require cash and trigger tax on short notice.
• Retirement-plan and equity vesting follow different rules, and assuming one works like the other leads to expensive surprises.