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RSU tax calculator

RSU taxes for executives and senior leaders

Large single vests deserve proactive withholding and estimated payment planning — surprises are avoidable.

Rates and rules change. Content is reviewed for tax year 2026. Check the last-reviewed date and methodology on each page, then confirm against IRS or state guidance before you file.

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In plain terms

When a single can be six or seven figures, the gap between flat and your real tax becomes large in absolute dollars. Executives usually benefit from planning and estimated payments deliberately, and from watching surtaxes that apply at high income.

How the tax works

Large vests are withheld at flat supplemental rates that can be well below a top .

At high income, additional wage-based and investment-income surtaxes can apply on top of ordinary tax.

Trading windows and blackout periods can limit when shares can be sold to raise cash.

Concentrated positions add investment risk separate from the tax question.

What to check on your end

  • The flat on a large vs. your top .
  • Whether additional Medicare tax or net investment income tax may apply.
  • Blackout windows affecting when you can sell.
  • Whether estimated payments are needed to avoid an underpayment.
  • Your overall concentration in company stock.

Common mistake

Letting a very large be withheld at a flat rate and waiting until filing to look at the math. At executive sizes, the gap can be a large balance due plus a penalty.

Example scenario (hypothetical)

Illustration only, not your tax situation.

Example: an executive vests $1,000,000 of withheld at a flat federal rate. The top plus surtaxes is higher, so the executive estimates the difference and makes an estimated payment rather than waiting for April.

When a CPA is worth it

  • Your vests are very large.
  • Surtaxes likely apply to you.
  • You face blackout or insider-trading constraints.
  • You want a coordinated and diversification plan.

Sources and notes

Primary tax claims on this page are supported by the official and secondary sources below. Broker and software links describe reporting mechanics — confirm rules against IRS or state guidance.

Employee equity tax planning context — not role-specific tax law.

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For learning, not filing

VestingTax.com is not a CPA firm or tax preparer. Grants, employers, and states all differ. Use the cited IRS and state sources above, your own documents, and a qualified tax professional before you make decisions from this guide.

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