Form 8949

Form 8949 ('Sales and Other Dispositions of Capital Assets') is the detailed transaction-level report that underlies the summary capital gains figures on Schedule D. Every sale of a stock, bond, mutual fund share, or other capital asset must be reported on Form 8949, which requires the taxpayer to list the description of the asset, the date acquired, the date sold, the gross proceeds, the cost basis, any adjustments, and the resulting gain or loss.

The form is divided into two parts: Part I covers short-term transactions (assets held one year or less) and Part II covers long-term transactions (assets held more than one year). Within each part, transactions are grouped into three categories: (A) or (D) for transactions where the broker reported the basis to the IRS; (B) or (E) for broker-reported proceeds without a reported basis; and (C) or (F) for transactions the broker did not report to the IRS at all, including transactions for noncovered securities.

In practice, brokers now generate 1099-B forms that provide most of the information needed for Form 8949. Many tax software programs can import the 1099-B data electronically and pre-populate Form 8949 automatically. However, taxpayers must still review the imported data carefully — brokers sometimes report incorrect basis (for example, missing the effect of DRIP reinvestments or stock spinoffs), and any adjustments must be entered in column (g) of the form along with the appropriate adjustment code.

Common adjustment codes include 'W' for wash sales (adding the disallowed loss to basis), 'B' for an incorrect basis reported by the broker, and 'H' for a gain that qualifies for the Section 121 home sale exclusion (rarely applicable to securities). If a taxpayer has hundreds or thousands of transactions, they may summarize groups of transactions by category on a single line of Form 8949 and attach a brokerage statement as a supporting document, provided all individual transactions are included in the statement.

Form 8949 totals flow to Schedule D, where they are combined with other capital gain or loss items such as carryforward losses, pass-through gains from partnerships or S corporations, and capital gain distributions from mutual funds.

How to Fill Out Form 8949: Each transaction requires six core data entries. Column (a) is the asset description — for stocks, use the ticker symbol and number of shares. Column (b) is the date acquired, which determines whether the holding period is short-term or long-term. Column (c) is the date of sale. Column (d) is the gross proceeds as reported on the 1099-B. Column (e) is the cost basis — use the amount from the 1099-B for covered securities, or your personal records for noncovered ones. Column (h) is the gain or loss: proceeds minus basis. If an adjustment is needed — for a wash sale, incorrect broker basis, or other modification — enter the adjustment amount in column (g) and the relevant code in column (f). Total each section and carry the net figures to Schedule D. Most major tax software handles this automatically when you import your 1099-B, but reviewing the imported transactions against your own records before filing is essential.

Covered vs Non-Covered: The 'covered' versus 'noncovered' distinction on Form 8949 determines how much work the taxpayer must do independently. Covered securities are those acquired after the mandatory cost basis reporting rules took effect for that asset class: most stocks purchased after January 1, 2011; mutual fund and ETF shares after January 1, 2012; bonds and options after January 1, 2014. For covered securities, brokers report both proceeds and basis to the IRS on Form 1099-B, and that data flows directly into Form 8949 via tax software import. For noncovered securities — typically older holdings, certain foreign stocks, or assets acquired before the applicable dates — the broker reports proceeds but not basis. The taxpayer must supply the basis from personal records. Omitting basis for a noncovered sale, or entering the wrong basis without documentation, creates audit risk and may result in the IRS assuming a zero basis on all proceeds.