RSU Cost Basis Calculator
Cost basis on sold RSUs usually ties back to vest FMV already taxed as wages. this tool helps you model that link.
Tax rules change. Federal and state rates, brackets, and reporting rules are updated regularly. This site is not always current. check dates below and verify with official sources or a qualified tax professional.
See something outdated?
Tax rules change faster than websites update. If a rate or date looks wrong, let us know.
Update needed? Contact usEducational estimate only
Educational estimate only, not tax advice. Cost basis on RSU sales depends on your vest records, W-2, and broker 1099-B. Verify against your actual documents before filing.
We do not pre-fill personal financial values. Estimates appear only after you enter your own numbers.
Enter your details to estimate
Add your equity, income, state, and withholding details to see an educational estimate. No personal financial values are pre-filled.
Start with the fields below.
Your details
Enter your own numbers below. This is an estimate, not a filing position.
Required to estimate
Fair market value when RSUs vested. this is usually your correct cost basis.
Required to estimate
Price you received when selling (before commission).
Required to estimate
Cost basis your broker reported. often $0 for RSUs. Leave blank to treat as $0.
Trading fees reduce sale proceeds.
Results will appear here once you enter the required details on the left.
Related guides
- 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.
- RSUs on 1099-B: What to Look For
1099-B for RSUs often shows low or zero basis. that does not mean your true basis is zero.
- RSU Sale Reported Twice: What To Check
Double-counting usually means basis was not adjusted. fix basis before panicking about tax owed.
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.
- RSUs on 1099-B: What to Look For
1099-B for RSUs often shows low or zero basis. that does not mean your true basis is zero.