CFP explains RSU tax mechanics

Max Pashman, a certified financial planner and investment adviser, used an X thread on May 14 to walk through how restricted stock units, or RSUs, are taxed in the United States. The explanation tracked closely with Internal Revenue Service guidance that treats RSU value as wage income when shares vest, not when they are granted. (pashmanfinancial.com) The post also focused on a common payroll issue: employers often sell or withhold some shares automatically for taxes, but that withholding may not match an employee’s final tax bill. (irs.gov 1) (irs.gov 2) IRS Publication 525 says certain employees of private companies may qualify for a separate deferral election on “qualified stock,” but standard RSU treatment starts with ordinary income at vesting. (pashmanfinancial.com) For most public-company RSUs, the vest date is the tax date that matters first, and any later stock-price move is handled under capital-gains rules. (irs.gov) ### When does an RSU become taxable income? RSUs become taxable when they vest and the employee receives the shares or the economic benefit of them, according to IRS Publication 525. (irs.gov) At that point, the fair market value of the shares is treated as compensation and is generally reported on the employee’s Form W-2. (irs.gov) That means a worker who sees 100 shares vest at $50 a share has $5,000 of ordinary wage income at vest. The grant date does not set the tax bill for standard RSUs, and an 83(b) election generally does not apply because no stock has been transferred before vesting. (irs.gov) ### Why can withholding still come up short? (irs.gov) The IRS says federal income tax withholding on supplemental wages remains 22%, with a 37% rate applying when supplemental wages paid to an employee exceed $1 million in the calendar year. (irs.gov) Employers commonly apply those supplemental-wage rules to RSU income through payroll. A 22% withholding rate can be lower than an employee’s actual marginal federal tax rate, especially for higher earners. That gap can widen further once Social Security, Medicare and state income taxes are considered, depending on the worker’s wage base and state of residence. (irs.gov) In practice, automatic “sell-to-cover” transactions may satisfy payroll withholding requirements without fully covering what is owed at filing. (irs.gov) ### What price sets the tax basis after vesting? The fair market value on the vest date generally becomes both the amount taxed as wages and the employee’s tax basis in the shares received. (irs.gov) That basis matters because it prevents the same value from being taxed again as capital gain when the shares are later sold. If those shares are sold immediately at roughly the vest-date price, the capital gain or loss may be minimal. (irs.gov) If the employee keeps the shares and the stock rises or falls afterward, only that post-vesting change is generally treated as capital gain or loss. (irs.gov) (grantthornton.com) ### When does capital-gains treatment start? Capital-gains treatment starts after vesting, once the employee owns the shares outright. A sale more than one year after vesting is generally eligible for long-term capital-gains treatment on appreciation above the vest-date basis, while a sale within one year is generally short-term. (grantthornton.com) That timing distinction is why planners often separate two decisions: how to fund the tax due at vesting and whether to keep or sell the stock afterward. Pashman’s thread centered on that split, urging readers to think about withholding, tax bracket exposure and sale timing as separate mechanics rather than one event. (grantthornton.com) ### What should employees check before the next vest date? The 2026 IRS employer guidance leaves the 22% and 37% supplemental withholding framework in place, which means employees with large vesting events may need to review paystub withholding before filing season. (grantthornton.com) Workers typically confirm the vest-date fair market value, the number of shares withheld or sold, and the basis reported later on Form 1099-B. (irs.gov) Pashman’s public X post remains the cited thread for his explanation, while the IRS publications provide the governing tax rules employees and payroll departments will use for the next vesting cycle. (x.com) (irs.gov) (irs.gov)