You sold RSU shares and tax software says you owe a huge capital gain, even though you already paid tax when the shares vested. This page walks through why W-2 wages and a 1099-B sale both show up without taxing the same dollars twice.
In plain terms
Gather before you start
- for the year the shares vested.
- for the sale (proceeds and reported basis).
- confirmation with per share on the .
- Rough idea of sale price and date.
Walkthrough for typical public-company RSUs. Grant types, broker reporting, and state rules vary.
How the tax works
At , payroll reports the full market value as wages on your — that is the first tax event.
for the shares you keep is usually the same , so the IRS expects sale gain to exclude those dollars.
Brokers often leave basis blank on because payroll, not the brokerage, recorded the income.
Tax software imports without knowing your history unless you override basis manually.
What to check on your end
- Whether wages appear in Box 1 for the year.
- proceeds vs. reported basis (often $0).
- per share × shares sold = proposed basis.
- Gain after basis adjustment vs. price change since .
- Whether tax software imported the without an adjustment.
Accepting $0 basis because the form says so
What to pull from your files
- Box 1 and any /stock plan line items for the year.
- Box 1d proceeds and Box 1e .
- confirmation: date, shares, used by payroll.
- Broker supplemental lot report if available.
- Trade confirmation showing sale price and fees.
Example scenario (hypothetical)
Illustration only, not your tax situation.
Questions people ask
- Are RSUs double taxed?
- Usually not on the same dollars. value is wage income on your . When you sell, tax applies to the price change after if basis is set correctly. It feels like double tax when shows $0 basis and software taxes the full sale.
- Are RSUs taxed twice?
- Same underlying rule as double taxation: wages and sale gain are separate events. If your search used this phrasing, the fix is still basis on Form 8949 — not deleting the or re-entering income.
- Why do RSUs show up on W-2 and 1099-B?
- reports the as wages. reports the brokerage sale. Both forms are expected when you sell shares you received from .
- Why does TurboTax say I have a big gain if I already paid tax?
- The software often imports basis as $0. The wages on your are separate. You generally need to tell the software the correct basis from your records so the sale only taxes the price change after .
- Do I report the vest again when I sell?
- No. The income belongs on the for the year. The sale goes on Form 8949/Schedule D with basis equal to for most standard .
When a CPA is worth it
- and adjusted still do not reconcile.
- You sold lots from multiple vests on one broker line.
- You received a CP2000 notice about unreported income.
- You have and sales mixed on the same account.
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.
Vest FMV as wage income vs broker-reported proceeds on 1099-B when basis is missing.
- IRS Publication 525 — Taxable and Nontaxable Income
Internal Revenue Service · Official
Covers compensation income from stock-based pay, including restricted property under section 83.
- 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.
- 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.
Related calculators
Related pages
- Why Is My RSU Cost Basis Zero?
Zero basis on 1099-B usually means the broker did not link your vest wage income — not that tax was skipped.
- How to Adjust RSU Cost Basis
Basis adjustments connect vest wage income to later sales — document FMV from vest records.
- How RSUs Are Taxed
RSUs are usually taxed as wages when they vest, not when the grant is signed. This guide walks through the timeline in plain terms.
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.
