RSU Vesting Explained: How Restricted Stock Units Actually Turn Into Shares You Own

RSU vesting is the process by which restricted stock units, the equity grant listed in your offer letter, convert into shares you actually own and can sell. Until a batch of RSUs vests, you hold nothing, no matter how large the grant looks on the offer letter's summary page. Once a batch vests, the shares are yours (minus taxes withheld), and that moment also creates a tax bill, since RSUs are taxed as ordinary income the day they vest.

What Is an RSU, and How Is Vesting Different From Owning It?

An RSU is a promise from your employer to give you a share of company stock on a future date, contingent on you still being employed. Vesting converts that promise into an actual, owned share. The grant your offer letter describes isn't stock you hold today; it's a schedule of future events that each happen or don't, depending on whether you're still there when the date arrives.

RSUs vs. Stock Options: What's the Difference

Both are equity compensation, but they behave differently. A stock option gives you the right to buy shares at a fixed strike price, and it can be worth nothing if the stock price falls below that strike. An RSU has no strike price, so as long as the stock has any value at all, a vested RSU is worth something. That's why RSUs are now the default at more established private companies and most public tech companies, while options remain more common at earlier-stage startups.

The Standard RSU Vesting Schedule

Most RSU grants vest over four years. A common pattern is 25% vesting after the first year, with the rest vesting monthly or quarterly for the following three years. The exact schedule is set by the company's equity plan, so read your own grant documents rather than assume a default.

How Does RSU Vesting Actually Work Day to Day?

An RSU vesting schedule is broken into individual vesting events, specific dates on which a defined number of units convert into shares. On each date, shares are deposited into your brokerage account, net of any withheld for taxes, and you're free to hold or sell them from that point on.

Vesting Events Happen on a Recurring Schedule, Not All at Once

A four-year grant with quarterly vesting after a one-year mark might have thirteen separate vesting events: nothing in year one, then a chunk every three months afterward, each with its own share count, market price, and tax consequence.

How a Cliff Fits Into an RSU Grant

Many RSU grants include an initial cliff, usually a year, during which nothing vests. We cover cliffs in detail in our guide to vesting cliffs; the short version for RSUs is that leaving before the cliff date on a standard grant typically means you receive none of that grant's shares.

Single-Trigger vs. Double-Trigger RSU Vesting

Single-trigger vesting means your RSUs vest based on one condition alone, usually the passage of time. Double-trigger vesting means two separate conditions both have to be satisfied, typically time-based vesting plus a liquidity event like an IPO or acquisition, before any shares actually settle.

What Single-Trigger Vesting Means

At most public companies, RSU vesting is single-trigger: you wait out the schedule, and shares land in your account on each vesting date regardless of anything else happening at the company.

What Double-Trigger Vesting Means, and Why It's Common at Private Companies

At many private companies, RSUs are double-trigger by design. The first trigger is the standard time-based schedule; the second is a liquidity event, most often an IPO. Until both conditions are met, no shares settle, even if the time-based schedule has technically completed, partly because private stock isn't easily sellable and partly because vesting illiquid stock can create a tax bill on shares you can't yet sell. If your offer includes RSUs at a private company, ask whether the grant is single- or double-trigger, and if double-trigger, what the second condition is.

RSU Vesting at a Private Company vs. After an IPO

While a company is private, RSU vesting commonly stalls behind a double-trigger structure, since there's no public market to sell into. Once a company goes public, that second trigger is satisfied, and any RSUs that had already cleared their time-based vesting typically settle in a batch shortly after the IPO, with normal single-trigger vesting continuing from there.

Before the IPO, "Vested" Doesn't Always Mean "Delivered"

Time-based vesting can keep accruing at a private company even while shares don't settle, which is why some offer letters describe "vesting" on a schedule that doesn't match when you'll actually receive stock. Ask what "vested" means in your grant: time-vested only, or fully vested and delivered.

After the IPO, Vesting Usually Simplifies

Once public, RSUs generally convert to standard single-trigger vesting, and each subsequent vesting date delivers real, tradable shares, subject to any post-IPO lockup period. Refresh grants issued after the IPO are usually single-trigger from the start.

What Happens to Taxes When RSUs Vest

RSUs are generally taxed as ordinary income at the fair market value of the shares on the date they vest, not when the grant was made and not when you eventually sell. This is general information, not tax advice; specifics like withholding rates vary by employer and jurisdiction, so confirm your own numbers with a tax professional.

Every Vesting Event Is Its Own Taxable Event

If your grant vests quarterly, you have a new tax event every quarter, calculated on that day's share price, not the price when the grant was issued or any earlier vest.

Withholding and "Sell to Cover"

Employers commonly withhold shares or cash at vesting to cover the tax liability, often by automatically selling a portion of the newly vested shares, a practice usually called "sell to cover." The exact rate and mechanism differ by company and can leave you owing more or less at filing time, so don't assume automatic withholding is your final tax bill.

Refresh Grants and What Happens If You Leave

Refresh grants are additional RSU awards issued after your initial grant, commonly on an annual cycle or tied to a promotion. Leaving the company, voluntarily or otherwise, generally forfeits any RSUs that haven't yet vested, regardless of how many refresh grants have accumulated.

Refresh Grants Usually Run on Their Own Schedule

A refresh grant typically starts its own independent vesting timeline rather than extending your original grant. Over a few years at the same company, it's common to hold two, three, or more overlapping RSU schedules at once. Ask HR for a consolidated view of all active grants if your offer letter or portal doesn't show one.

What Happens to Unvested RSUs If You Leave

If you leave before a vesting date, the unvested portion of every active grant is typically forfeited and returned to the company's equity pool. Shares that already vested before you left are yours regardless of what happens afterward. If a layoff is involved, our severance package guide walks through what else to check.

Frequently Asked Questions

How does RSU vesting work in simple terms?

RSU vesting is a schedule that converts a stock grant into shares you actually own, typically over four years, with a portion vesting on each scheduled date rather than all at once. You own nothing from the grant until each date passes, and each vest is taxed as ordinary income based on that day's share value.

Do RSUs vest immediately at a private company?

Not usually. Many private companies use double-trigger vesting, requiring both time-based vesting and a liquidity event like an IPO before shares actually settle, even if the time-based portion of the schedule has technically completed.

Are RSUs taxed when they vest or when I sell them?

The value of the shares at vesting is generally taxed as ordinary income on the vest date. Any change in value between vesting and a later sale is typically handled separately as a capital gain or loss. This is general information, not tax advice.

What happens to my RSUs if I quit or get laid off?

Shares that already vested before you left are yours. Any unvested portion, including refresh grants, is typically forfeited when your employment ends, unless your agreement includes specific acceleration terms.

Key Takeaways

• RSU vesting is the schedule that converts a stock grant into shares you own, most commonly over four years, and you own nothing until each vesting date passes.
• Single-trigger vesting depends only on time; double-trigger vesting, common at private companies, also requires a liquidity event like an IPO before shares settle.
• Each vesting event is a separate taxable event, generally taxed as ordinary income at that day's share value; this is general information, not tax advice.
• Refresh grants run on their own independent vesting schedules, and unvested shares from any grant are typically forfeited if you leave before the vesting date.
• If your offer letter's equity section is vague about vesting structure, trigger type, or refresh eligibility, get clarity in writing before you sign; Offer XRay is built to flag exactly this kind of unclear equity language.

RSU vesting looks simple on the summary slide of an offer letter, four years, quarterly vesting, done, but the real mechanics, trigger type, tax treatment, refresh timing, are where the details that matter to your take-home value live. If you want a second look at your equity terms before you sign, our negotiation email template for job offers or a run through Offer XRay can help.