When to sell RSUs after vesting: the default is sell

Devon vested a Q3 Apple grant last Friday. Four hundred shares. On paper, $75,000 gross. Sell-to-cover pulled about 120 shares back to satisfy withholding, so the account this morning shows 280 remaining shares, worth roughly $52,500 at yesterday's close.

The question is whether to sell them today, sell them Monday, or keep them.

Capital gains rules, wash-sale windows, and Roth-ladder timing all matter for a small subset of vested RSU holders. For most people, most of the time, the answer is one word. Sell.

One question, one number: what to do with $75,000 in vested Apple the morning after

The reason the sell-day question feels harder than it is: the shares showed up as a windfall. Windfalls activate a different part of the brain than paychecks. Devon didn't feel like he earned the $75,000 the way he feels he earns his $6,000 direct deposit, so the loss aversion around selling reads louder.

The tax accounting says otherwise. The $75,000 was already treated as ordinary W-2 income at vest. The IRS taxed it as if it had hit his bank account in cash. Sell-to-cover withheld a first slice of that tax, often at the 22% federal supplemental rate, which is below what a senior engineer at Apple's total comp actually owes at his marginal bracket. He'll owe more in April regardless of whether he sells the remaining shares today.

The shares Devon holds this morning are the same as if his paycheck had been $75,000 larger and he'd been handed $52,500 in after-withholding cash. The question "should I sell RSUs immediately after vesting" is identical to "should I take $52,500 of cash I just earned and buy Apple stock with it today."

Framed that way, the answer collapses.

The default is sell, because holding is buying (the concentration-risk anchor)

Holding vested RSUs is buying. Every trading day you keep them, you are actively choosing to hold that dollar amount of your employer's stock instead of anything else you could hold. It doesn't feel like buying, because no one clicked a button. The IRS knows better; from its perspective the buying happened on vest day, and every day after is a new hold decision.

Fee-only planners default to sell for a specific reason. Your salary is already priced to the company. Your benefits are priced in. Your professional network, your immediate promotion path, the relevance of your resume in a downturn. All of it moves with the same underlying business. Layer meaningful concentration in the stock on top and one bad quarter can hit your income, your net worth, and your career at once.

Look — this is why the "hold or sell RSU after vesting" question gets the same answer from most independent advisers regardless of the company. Concentration risk drives the answer. Company fundamentals sit further down the list. The same mechanic sits underneath the broader golden handcuffs trap: retention structures work by making concentration feel like a windfall rather than a bet.

The eleven-month exception: when waiting two months moves you from 37% to 15%

The one real exception in the tax code, the place where selling RSUs tax strategy actually earns its keep, is the long-term capital gains window. This is where the "rsu vesting sell now or later" question has a real answer that depends on the calendar.

Here's the mechanic. The vest-day price becomes your cost basis. Sell on vest day and your capital gain is zero. Sell later and any price move since vest becomes a capital gain or loss. Held one year or less from vest date, that gain is taxed as ordinary income, up to 37% federal for a top-bracket earner. Held one year and one day or more, it becomes long-term at 0%, 15%, or 20% depending on total income. The IRS Topic 409 rules on Capital Gains and Losses are the governing reference.

The useful case: you didn't sell at vest. Months passed. The stock is up 15% since vest date. You're now eleven months in. The honest math: on a $52,500 post-withholding position with 15% appreciation, that's $7,875 of gain. Selling now, taxed as ordinary income, costs up to $2,914 at 37%. Waiting 60 more days for long-term treatment, taxed at 15%, costs $1,181. Difference is about $1,733.

Real money. But narrow. Two conditions have to hold: you're already past ten months from vest date, and the shares have actually appreciated. If price is flat, there's nothing to save. If you're four months in, the calculation doesn't apply. Treat this as a one-shot exception.

The best time to sell vested RSUs is either now or one year and one day from vest. About 90% of positions never get near that fork.

The two other narrow exceptions: blackout windows, and real diversification

Two more cases where waiting is defensible.

Blackout windows: many public companies restrict trading by covered employees around earnings, material announcements, and defined pre-announcement periods. If you're on the covered list, you can't sell during the window. The calendar decides for you. Sell in the next open window and move on.

Real diversification is the case people invoke most often and rarely mean. Real diversification means you have a written target allocation, you know what percentage of net worth you actually want in employer stock (most fee-only planners cap concentrated positions at 5% to 10% at the top), and your current holdings sit at or below that target. Keeping vested shares as part of a documented allocation is defensible. Keeping them because you feel the stock is going up is a trader's bet on price. That's a different action from allocation, which requires the written target and the current-vs-target check.

If the shares would push you above your target percentage, sell the excess. That's the whole rule.

Sell-to-cover is not a decision, and the reframe that makes the whole thing obvious

Sell-to-cover happens automatically. The tax withholding, at 22% federal supplemental plus state and FICA, comes out at vest by the employer selling enough shares. You don't pick "sell to cover vs sell all" as a comparison. Sell-to-cover is what the payroll system does. Sell all is what you decide about the leftover shares.

Rephrasing the choice as "sell to cover vs sell all" makes it sound like two comparable options. Sell-to-cover is the tax event. Sell all is the investment decision that follows.

The reframe that ends the debate: assume the sell-all path is the default. On vest day, sell everything. The cash lands in your account. You now decide, from scratch, what to do with $52,500 of newly earned money. Would you buy Apple stock with it? If no, you already made the right call. If yes, buy the same dollar amount back and pay the transaction cost. In practice almost no one buys back, which tells you what the answer was.

Every day of holding asks the same day-one question. The share price changes. The question doesn't.