In plain terms
How the tax works
At , tax must be withheld on the wage income. Many plans handle this by selling some of the just-vested shares.
The number of shares sold is based on the rates the plan applies, rounded up to whole shares.
You receive the net shares; the proceeds from the sold shares go toward your .
Because rates may be lower than your , does not always mean your full tax bill is paid.
What to check on your end
- How many shares were sold vs. delivered on your confirmation.
- The rate the plan used.
- Whether that rate is below your likely .
- How the sold shares appear on your .
- Whether you need to cover a remaining gap with estimates.
Common mistake
Example scenario (hypothetical)
Illustration only, not your tax situation.
When a CPA is worth it
- You consistently owe after .
- You want to compare with selling everything.
- You have insider-trading or blackout constraints.
- You are unsure how the sold shares are reported.
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.
How RSU vest wages and share sales appear on W-2, 1099-B, and Form 8949.
- About Form 1099-B — Proceeds from Broker and Barter Exchange Transactions
Internal Revenue Service · Official
Broker reporting of sales proceeds and basis; basis on 1099-B may be incomplete for equity-compensation shares.
- Instructions for Form 8949 — Sales and Other Dispositions of Capital Assets
Internal Revenue Service · Official
How to report sales when broker-reported basis is incorrect, including adjustment codes.
- Filing taxes for restricted stock, RSUs, or performance awards (tax guide PDF)
Fidelity Stock Plan Services · Brokerage explainer
Explains W-2 vest income, 1099-B with $0 basis, supplemental adjusted cost basis, and Form 8949 reporting.
Related calculators
Related pages
- RSU Net Settlement Explained
Net settlement uses withheld shares to pay vest tax — wage income is still full vest FMV, unlike sell-to-cover which often generates a 1099-B sale.
- Same-Day Sale vs Sell-to-Cover
Both methods sell shares around vest, but who initiates the sale and how proceeds flow can differ.
- Why Do I Owe Taxes After Sell-to-Cover?
Your employer may sell fewer shares than your total tax, or use rates that do not match your bracket.
- What Happens When RSUs Vest?
On vest day your employer typically reports wage income, withholds tax, and may sell shares — here is what to expect.
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.