How RSUs Are Taxed: Year-End Moves to Review

• Published: 2026-10-06

RSUs are taxed as ordinary income at vesting, and default withholding often falls short. Here are three year-end checkpoints tech employees commonly review.

RSUs (restricted stock units) are generally taxed as ordinary income based on the fair market value of the shares on the day they vest — not when they're granted or sold. Because employer default withholding doesn't always match an individual's actual tax rate, many equity-compensated employees find themselves under-withheld without realizing it until tax time. As the year winds down, reviewing how RSU income interacts with the rest of a financial plan is a worthwhile exercise for anyone with vesting equity.

What Triggers the Tax Bill on RSUs?

The tax event happens at vesting, not at grant. On the vesting date, the fair market value of the shares that vest is treated as ordinary income and is generally reported through payroll. This matters because:

• Multiple vesting dates in a single year can push total income higher than expected.
• The value used for tax purposes is locked in on the vesting date, regardless of what the stock does afterward.
• This income is separate from any future gain or loss if the shares are held and later sold.

Is Employer Withholding Enough?

Not necessarily. Employers often apply a standard default withholding rate to vested RSU income, but that flat rate can be lower than an individual's actual marginal tax rate — especially for employees whose total income, including salary and other equity, places them in a higher bracket. This gap between what's withheld and what's actually owed is one of the most common surprises equity-compensated employees encounter.

A Practical Check Before Year-End

• Add up RSU vesting income received so far this year.
• Compare the amount withheld at vesting against your estimated overall tax liability for the year.
• Decide whether any adjustment — such as additional withholding elsewhere in the year or setting aside funds for a potential tax bill — makes sense for your situation.

This is a general planning principle, not a substitute for a tax professional's review of your specific numbers.

What About 401(k) Decisions Tied to Job Changes?

Tech professionals often change employers, and a job change typically raises a 401(k) decision alongside any RSU questions. When leaving an employer, individuals generally have a few options:

• Leave the funds in the former employer's plan, if permitted.
• Roll the balance into a new employer's plan.
• Roll the balance into an IRA.

Each option comes with its own rules, investment choices, and fee structures, so it's worth reviewing plan documents or speaking with the plan administrator before deciding. Because this decision often lands in the same year as RSU vesting and other income events, reviewing both together — rather than in isolation — gives a fuller picture of year-end tax exposure.

Three Year-End Moves Worth Reviewing

• Check your RSU withholding against your actual tax situation. Don't assume the default rate automatically covers what you'll owe.
• Tally all vesting events for the year. If you have multiple vesting dates, add them up before year-end so there are no surprises when you file.
• Revisit any pending 401(k) decisions from a job change. Leaving funds in place, rolling into a new plan, or rolling into an IRA each carry different rules — compare them before a deadline forces a default outcome.

Conclusion

RSU income and 401(k) decisions tend to arrive at similar points in a career, and reviewing both together — rather than reacting to each separately — is a sound year-end habit for tech professionals with equity compensation. Specific tax rates, contribution limits, and plan deadlines change and should be confirmed with the IRS, your plan administrator, or a qualified tax professional before you act.