Form 8949

The Form 8949 (Sales of Securities) is where you detail every stock, bond, and mutual fund transaction you sold during the year. For each sale, you list the proceeds, cost basis, and capital gain or loss. The totals from Form 8949 then transfer to Schedule D, which summarizes your net capital gains and losses. Any investor with taxable transactions must file Form 8949.

Why Form 8949 exists

When the IRS redesigned capital gains reporting (around 2011), it created Form 8949 to capture detailed transaction data. This allows the IRS to cross-check your reported gains against broker 1099-B data electronically. Without Form 8949, tax enforcement of capital gains would be difficult.

What goes on Form 8949

Each line reports one transaction:

Description of property (e.g., “Apple Inc. Class A Common Stock, 100 shares”) Date acquired (purchase date) Date sold (sale date) Proceeds (sale price × shares) Cost basis (broker or your calculation) Gain or loss (proceeds minus cost basis)

Two parts: short-term and long-term

Part I lists sales of securities held one year or less (short-term). Part II lists sales held over one year (long-term). Holding period is determined by comparing the sale date to the acquisition date.

Matching with 1099-B

Your 1099-B from your broker should contain most or all of your transactions. For securities acquired after 2011, your broker must report cost basis. You can use the 1099-B to populate Form 8949, or tax software can import it automatically.

For older securities (acquired before 2011), you provide your own cost basis, usually from old confirmations or statements.

Unreported transactions

If you have transactions not on 1099-B—perhaps from an old broker or inherited assets—you must manually enter them on Form 8949.

Wash-sales

If your broker identified a wash-sale on your 1099-B, the disallowed loss is shown separately. You must report the disallowed loss on Form 8949 and note that it is a wash-sale.

Cost basis adjustments

Sometimes you may need to adjust cost basis on Form 8949:

• Wash-sale loss added to new basis
• Stock splits (rare on modern Form 8949, usually handled by brokers)
• Return of capital distributions reducing basis

These adjustments can make Form 8949 complex; consider professional help if your situation is complicated.

Multi-year reconciliation

If you are reconciling multiple years (e.g., an audit), you may need to file amended Form 8949 for prior years. Amendments require filing an amended Form 1040 and amended Schedule D with corrected Form 8949.

Totaling and transfer to Schedule D

You sum all short-term gains and losses on Part I, then all long-term gains and losses on Part II. These subtotals transfer to Schedule D, which nets them together and calculates your overall net capital gain or loss.

Order of transactions

Form 8949 transactions can be listed in any order, though many software programs sort by holding period or date sold. The order does not affect your tax liability.

IRS cross-checking

The IRS electronically compares your Form 8949 totals against 1099-B totals reported by your broker. Large discrepancies can trigger an IRS inquiry or audit. If your reported cost basis differs significantly from what the broker reported, be prepared to explain.

Special situations

Mutual fund distributions: If a mutual fund made a capital gains distribution (reported on 1099-DIV), you report this on Form 8949 as if you sold the securities. The distribution is always long-term capital gain.

Depreciation recapture: Sales of real estate and equipment may have depreciation recapture components. These may be reported on Form 8949 or Form 4797.

Options: Sales of call and put options are also reported on Form 8949, though the treatment can be complex.

See also