Key Takeaways
- RSUs are taxed as wages at vest; the flat withholding rate is usually below a high earner's real rate, so check for a shortfall every big vest year.
- Sell-at-vest is the clean default: holding vested shares is a fresh decision to buy company stock with a cash bonus.
- Plan vests on a multi-year calendar: charitable timing, estimated taxes, and diversification all key off the schedule.
Restricted stock units are the simplest equity compensation to receive and the easiest to mishandle at scale. The mechanics: on each vest date, shares land in your account and their full market value lands on your W-2 as ordinary wages. There is no election to make and no exercise to time, which lulls people into treating vests as background noise while two problems compound quietly: under-withheld taxes and a swelling single-stock position.
Here is the playbook, organized the way vests actually arrive: before, at, and after.
Before the Vest: Withholding and Calendar
Employers typically withhold RSU income at the flat supplemental wage rate, 22% federally up to $1 million of supplemental wages, 37% beyond, while a high earner's true marginal rate with state tax often runs higher, and Georgia adds its flat rate on top. A $300,000 vest year can quietly build a five-figure April balance due plus penalties. Fix it in advance: project the year's vests each January, compare total withholding against the safe-harbor floor, and cover gaps with estimated payments or a W-4 adjustment.
Map the vest calendar itself: dates, share counts, and cliff events. Multi-year planning, charitable bunching, exercise timing for any options, big deductions, works off this calendar.
At the Vest: the Sell-or-hold Decision
Vesting already taxed you; selling immediately adds almost nothing, the shares' basis equals the vest-date price. So the question is never "can I afford the tax to sell," it is "would I buy this many shares of my employer today with a cash bonus?" For most people carrying future vests, unvested grants, and a paycheck from the same company, the honest answer is no, which makes sell-at-vest the sturdy default: automate it where your plan allows, sweep proceeds into the diversified portfolio, and let the concentration guide govern any legacy position.
Try it: the free The Wealth Checkup takes a couple of minutes and shows you where you stand. Or explore equity & business at Attend.
After the Vest: What Holding Means
Shares held past vest behave like any stock: gains beyond vest-date value become capital gains, long-term after a year. Holding can make sense within a written position limit, say, keeping employer stock under 10% of investable assets, or when specific lots sit near long-term treatment with modest gains. What does not survive scrutiny: holding because selling feels disloyal, because the stock "always comes back," or because nobody decided anything. Untracked, ten vests become a position that dwarfs the 401(k).
The Multi-year Integrations
Big vest years are the moment for offsetting moves: maximize pre-tax 401(k) and HSA space, bunch charitable gifts, ideally of the appreciated legacy shares rather than cash, per the giving guide, and avoid stacking elective income like Roth conversions or option exercises on top. Departing employees should read their grant docs early: unvested RSUs are usually forfeited, double-trigger private-company RSUs behave differently, and a resignation date one week before a cliff has a price.
We run this whole calendar for clients in equity planning; the free equity guide in resources is the printable version.
Frequently Asked Questions
My employer withholds shares for taxes. Am I covered?
Share withholding usually happens at the flat supplemental rate, so high earners are often still short. Compare total-year withholding to the safe harbor, not to the vest-day statement.
Should I hold RSUs for a year for lower tax rates?
The vest-date value is taxed as wages regardless. Only post-vest growth gets capital-gains treatment, so holding for a year risks a concentrated position to change the tax on future appreciation only.
What happens to RSUs if I change jobs?
Unvested RSUs are typically forfeited at termination, with limited exceptions for retirement-eligible employees in some plans. Check your grant agreement before setting a departure date near a vest.
Tony leads Attend Wealth, a fee-based wealth management firm in Atlanta serving professionals, families, and business owners. Advisory services are held to a fiduciary standard. More about Attend
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