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RSU tax calculator

Role Guides

Your role shapes how equity shows up in your pay. These guides highlight the tax questions that tend to come up in each path.

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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The tax mechanics of RSUs are the same for everyone; what changes is how often vests stack with salary, bonus, commissions, or a spouse's income. These role guides highlight the planning questions that come up most for each path.

Documents every role should save

Educational checklist — gather these before running calculators or filing. Your plan administrator may use different labels.

  • confirmation from your equity portal (date, shares, , )
  • Pay stub from the pay period ( lines)
  • for the year (Box 1 wages, state boxes if applicable)
  • for any share sales (proceeds and reported basis)
  • Broker supplemental stock plan statement or lot detail report
  • Grant agreement and schedule (for timing and grant type)
  • / exercise notice and Form 3921 if you exercised options
  • State residency dates and move records if you relocated during the year

Mistakes that show up across roles

  • Treating withholding as your final tax

    Employers often withhold at a flat supplemental rate on RSU vests. That rate is a payroll default, not a cap on what you owe for the year. Your marginal rate on stacked salary plus vest income may be higher.

  • Assuming sell-to-cover means taxes are fully paid

    Sell-to-cover sells shares to fund withholding. It does not automatically match your full-year marginal tax. You can still owe at filing if rates were too low or state tax was under-withheld.

  • Double-counting or undercounting basis on 1099-B

    Vest income belongs on your W-2. The sale still belongs on Form 8949. If the broker reports $0 basis, adjust to vest FMV — do not delete the sale or assume the W-2 alone covers it.

  • Forgetting state sourcing after a move

    A mid-year relocation can split which state taxes vest income. Keep lease, domicile, and payroll records — not just your current mailing address.

Guides by role

  • Software engineers

    Refresh grants and quarterly vests stack quietly until one calendar year crosses a bracket threshold.

    • Recurring RSU refreshers overlapping cliff vests
    • Withholding gaps when salary is modest but vests are large
    • State moves between CA, WA, TX, and NY tech hubs
    • First open-market sales after IPO lockup

    Flat supplemental withholding on each vest does not reset your annual bracket — run the withholding gap calculator when refreshers land in the same year.

    Engineer RSU tax guideWithholding gap calculatorRSU Tax CalculatorCalifornia to Washington

  • Product managers

    Bonus cycles, promo RSU grants, and job changes can concentrate equity income in one tax year.

    • Mixed salary, bonus, and RSU timing around reviews
    • Job changes mid-year and double W-2s
    • State moves when switching employers or going remote
    • Sell-to-cover vs hold decisions after large refresher grants

    A new grant signed in December may not vest until the next year — but bonus plus existing vests can still push withholding short in the current year.

    PM RSU tax guideRSU tax calculatorLeaving your companyEquity comp tax calendar

  • Tech sales

    Commission spikes and RSU vests in the same quarter can stack marginal rates higher than quota attainment alone suggests.

    • Commissions plus equity in one payroll year
    • Withholding stacking when both hit the same pay period
    • Quarterly cash planning for estimated payments
    • 1099-B sales after holding vested shares post-quota year

    Commission withholding and RSU supplemental withholding are calculated separately — combined income may still exceed what either line shows.

    Tech sales RSU guideWithholding gap calculatorAnnual RSU income estimatorEstimated tax paymentsFiling extension with RSU forms

  • Executives

    Large single vests, concentrated employer stock, and overlapping option exercises need document discipline early.

    • Concentrated equity and diversification timing (conceptual — not investment advice)
    • 10b5-1 plans as a scheduled-sale concept only — plan rules and securities law are separate topics
    • Liquidity events, tender offers, and lockup expirations
    • When to involve a CPA, attorney, or financial planner

    A 10b5-1 plan does not change tax character of sales — it only schedules them. Tax timing still follows vest, exercise, and disposition rules.

    Executive RSU guideRSU tax calculatorTender offer taxHigh earners guide

  • Startup employees

    Options, 83(b) deadlines, and ISO/NSO labels are easy to confuse before any liquidity event.

    • ISO vs NSO grant paperwork and exercise windows
    • 83(b) elections within 30 days of early exercise
    • Leaving-company deadlines and post-termination exercise
    • Tax due before you can sell private shares

    Exercising options can trigger tax without cash from a sale — model ISO AMT and NSO wage tax before you exercise.

    Startup employee guideISO AMT Calculator83(b) election explainedPrivate company equity tax

  • New grads

    The first RSU vest is often the first time W-2 wages jump — sell-to-cover and 1099-B basis confuse new filers.

    • First RSU vest and reading a vest confirmation
    • Sell-to-cover and why net shares are less than gross vest
    • Why both W-2 and 1099-B matter when you sell later
    • Withholding gaps on a still-modest salary base

    Sell-to-cover reduces shares delivered but does not always cover the full tax bill if your bracket is above the flat supplemental rate.

    New grad RSU guideSell-to-cover calculatorHow RSUs are taxedRSU cliff vest taxEquity comp tax documents

Quick links

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.

Flat supplemental withholding on multiple vests vs marginal tax when income stacks in one year.

Confirm any tax outcome with your documents and a qualified tax professional. See our editorial standards for how we source and update pages.

All role guides