Equity Compensation Tax Planning: When RSUs, Options and Deferred Pay Land in the Same Year
Equity compensation tax planning is the work of looking at every equity and deferred-pay event that creates income in one tax year, together, before the year closes. Restricted stock units, option exercises, employee stock purchase plan sales and deferred compensation are each taxed on their own schedule. The problem usually appears when several land in the same year. Withholding set at a flat rate can fall short of the tax actually owed, estimated payments can miss the safe harbor, and two federal surtaxes can apply on top. This page sets out how each event is taxed, where the gaps open, and what Florida residence does and does not change.
- The spread on a non-qualified option exercise is reported as wages, and RSU income is generally treated the same way. Social Security and Medicare tax applies; for RSUs it can apply at vesting rather than delivery.
- Where supplemental wages are identified separately and income tax was withheld from regular wages, an employer may withhold a flat 22% up to $1 million a year; above $1 million, 37% is mandatory (IRS Publication 15, 2026).
- For a household in a higher bracket, 22% withholding can leave a balance due. The estimated-tax safe harbor is generally the smaller of 90% of this year’s tax or 100% of last year’s, with 110% in place of 100% if last year’s AGI exceeded $150,000 (IRS Publication 505, 2026).
- Gains on later sales can also carry the 3.8% Net Investment Income Tax above $200,000 of modified AGI ($250,000 joint). These thresholds are fixed in the statute.
- Florida has no personal income tax, so for a Florida resident the federal rules are the whole calculation.
Why One Tax Year Is the Unit That Matters
Each form of equity compensation has its own trigger. An RSU is taxed when shares are delivered. A non-qualified option is taxed when it is exercised. An incentive stock option creates no regular income tax at exercise, but the spread is an adjustment for the alternative minimum tax. Deferred compensation is generally subject to Social Security and Medicare tax when it vests, under a special timing rule, which can be well before the plan pays it out. None of these triggers is aware of the others. In a year when a large RSU tranche delivers, a batch of options is exercised and a deferral starts paying out, the income arrives together and is taxed together, even though every decision behind it was made separately. As Mitch Allen, CFP®, put it on the episode featured this month: “If we can measure it, we can manage it.”
The Events That Create Income, and When
| Event | When income is generally recognized | Type of income | Social Security and Medicare |
|---|---|---|---|
| RSU shares delivered | At delivery, at fair market value | Wages | Yes; can apply at vesting when delivery is deferred |
| Non-qualified option exercised | At exercise, on the spread | Wages | Yes |
| Incentive stock option exercised | No regular income tax at exercise; the spread is an AMT adjustment | AMT adjustment | No |
| ESPP shares sold | At sale; the character depends on the holding periods | Ordinary income and/or capital gain | No |
| Deferred compensation vests | For Social Security and Medicare: the later of when the services are performed or when the amount vests | Wages | Yes, under the special timing rule |
| Shares later sold | At sale, on gain above the income already taxed | Capital gain, long-term if held more than one year | No |
For stock acquired through a non-qualified option, the basis is the amount paid plus the amount already included in income as wages. The gain or loss beyond that is a capital gain or loss, and it is long-term if the shares were held more than one year after they were acquired (IRS Publication 525).
Why Withholding Often Falls Short
Employers commonly withhold on RSU income and option spreads as supplemental wages. IRS Publication 15 (2026) states that the withholding rate on supplemental wages “remains 22% (37% if supplemental wages paid to an employee during the calendar year exceed $1 million).” The flat 22% is a method an employer may use when the supplemental wages are identified separately and income tax was withheld from the employee’s regular wages in the current or prior year; above $1 million, the 37% rate is mandatory regardless of Form W-4. Withholding is a default, not a calculation of what the household owes. A household whose other income already reaches the top bracket pays 37% on the next dollar of wages, and the 22% withheld does not cover it.
Estimated Tax and the Safe Harbor
A withholding gap becomes a penalty question when the year closes. Under IRS Publication 505 (2026), a taxpayer generally avoids the underpayment penalty when withholding and estimated payments cover the smaller of 90% of the current year’s tax or 100% of the prior year’s tax. If the prior year’s adjusted gross income was more than $150,000 ($75,000 married filing separately), the 100% becomes 110%. Some exceptions apply, including when less than $1,000 is owed after withholding and credits. For a year with unusually large equity income, the prior-year test is often the one that decides it, and it can be checked before the final estimated payment is due.
The Two Surtaxes That Sit on Top
Two federal taxes apply above fixed thresholds. The 3.8% Net Investment Income Tax applies to the lesser of net investment income or modified AGI above $200,000 single or $250,000 married filing jointly (26 U.S.C. §1411). It reaches gains when shares are later sold, not the wage income itself, and the thresholds have not changed since the tax began in 2013. The 0.9% Additional Medicare Tax applies to wages above $200,000 single or $250,000 joint. An employer must withhold it once the wages it pays an employee pass $200,000 in a calendar year, whatever the filing status, so a two-earner household can be under-withheld and reconcile it on the return (IRS Topic 560).
ESPP Sales and the Two Holding Periods
Under a Section 423 employee stock purchase plan, the purchase price can be as low as 85% of the stock’s fair market value, measured at the start of the offering or at purchase according to the plan’s terms. The tax result depends on when the shares are sold. A qualifying disposition requires that no disposition is made within 2 years after the option was granted nor within 1 year after the shares were transferred (26 U.S.C. §423). A sale before either period ends is a disqualifying disposition. The difference between the stock’s value at purchase and the price paid is then ordinary income, even if it is more than the gain on the sale; the rest is capital gain or loss. The dates are fixed at purchase, so the ESPP calendar belongs on the same page as the RSU and option calendar.
What Florida Residence Does and Does Not Change
Florida does not impose a personal income tax; the Florida Constitution, Article VII, Section 5, limits it. For a Florida resident, the federal rules above are the whole calculation. That makes the federal elections and holding periods more consequential, not less, because there is no state layer to offset or complicate them. Moving to Florida does not end another state’s claim on income already earned there. New York and California, for example, tax the share of stock option and restricted stock income earned through work performed in the state, generally measured from grant to vesting, even after the employee has moved.
Frequently Asked Questions
What are the tax implications of receiving equity compensation?
It depends on the type. RSU income at delivery and the spread on a non-qualified option exercise are taxed as wages. An incentive stock option creates no regular income tax at exercise but an alternative minimum tax adjustment. ESPP shares are taxed when sold. Later gains on any of the shares are capital gains, long-term if held more than one year.
What are the main types of equity compensation?
The forms covered on this page are restricted stock units, stock options (non-qualified and incentive) and employee stock purchase plans. Executives may also hold non-qualified deferred compensation, which is not equity but is often taxed in the same years.
Is an ISO better than an RSU?
Neither is better in general; they are taxed on different events. An RSU creates wage income when the shares are delivered. An incentive stock option creates no regular income tax at exercise but can create alternative minimum tax, and it requires holding periods to keep its treatment. Which suits a household depends on its own income, holdings and timing.
What are the disadvantages of stock-based compensation?
For the employee, three follow from the rules on this page: income can arrive in years the household did not choose, withholding at a flat rate can fall short of the tax owed, and the shares can concentrate wealth in one employer. Each is a reason to look at the year as a whole.
This Month from Security Financial Management
INSIGHT — Executive Compensation Planning and the Closing Window
RESOURCE — Executive Compensation Planning
CONVERSATION — Executive Compensation Planning When Your Employer Is Also Your Largest Holding
MARKET COMMENTARY — September 2026 Market Commentary
Schedule with Security Financial Management
If you want help seeing your own equity and deferred-pay events on one calendar, schedule a conversation or call (407) 740-6553. You work with a lead advisor who knows your plan, backed by specialists in investment, retirement, estate and insurance who coordinate every part of it.
About the Author
Dave Allen, CFP® · Managing Partner, Security Financial Management · CRD #1210763. Verify credentials at BrokerCheck by FINRA.
Disclosures
This article is for informational and educational purposes only and does not constitute investment, tax, or legal advice. The hypothetical illustration is for explanation only; it is not a projection and does not reflect any client’s situation. Tax consequences of equity compensation depend on plan terms and individual circumstances and should be reviewed with a qualified tax professional. Tax rules and thresholds cited are as published by the IRS for 2026 and may change. Past performance does not guarantee future results. Securities offered through Kestra Investment Services, LLC, member FINRA/SIPC (Kestra IS). Investment advisory services offered through Kestra Advisory Services, LLC (Kestra AS). Security Financial Management, Bluespring Wealth Partners, LLC, Kestra IS and Kestra AS are affiliated through common ownership by Kestra Holdings.