Part I. Use a separate Part I for each type of short-term

transaction described in the text for one of the boxes (A, B, C, G, H, or I) at the top of Part I. Include on each Part I only transactions described in the text for the box you check (A, B, C, G, H, or I). Check only one box on each Part I. For example, if you check box A or box G, include on that Part I only short-term transactions reported to you on a statement showing basis was reported to the IRS. Complete as many copies of Part I as you need to report all transactions of each type (A, B, C, G, H, or I).

If you are attaching multiple Forms 8949 to your return, attach the Form(s) 8949 that lists code "Z" in column (f) first.

If you received a Form 1099-B or Form 1099-DA for a transaction, the “Applicable checkbox on Form 8949” box near the top of that form may help you determine which box to check on the Part I where you report that transaction. A substitute statement you get instead of Form 1099-B or Form 1099-DA may also tell you which box to check.

Box A or Box G. Report on Part I with box A or box G checked all short-term transactions reported to you on Form 1099-B or Form 1099-DA (or substitute statement) with an amount shown for cost or other basis unless the statement indicates that amount wasn't reported to the IRS. If your statement shows cost or other basis but indicates it wasn't reported to the IRS (for example, if box 12 on Form 1099-B or box 2 on Form 1099-DA isn't checked), see Box B or Box H below.

Tip: If you don't need to make any adjustments to the basis or type of gain (or loss) reported to you on Form 1099-B or Form 1099-DA (or substitute statement) or to your gain (or loss) for any transactions for which basis has been reported to the IRS (normally reported on Form 8949 with box A or box G checked), you don't have to include those transactions on Form 8949. Instead, you can report summary information for those transactions directly on Schedule D. For more information, see Exception 1, later.

Box B or Box H. Report on Part I with box B or box H checked all short-term transactions reported to you on Form 1099-B or Form 1099-DA (or substitute statement) without an amount shown for cost or other basis or showing that cost or other basis wasn't reported to the IRS. If your statement shows cost or other basis for the transaction was reported to the IRS (for example, if box 12 on Form 1099-B or box 2 on Form 1099-DA is checked), see Box A or Box G above. Box C or Box I. Report on Part I with box C or box I checked all short-term transactions for which you can't check box A, B, G

Instructions for Form 8949 (2025) 3

or H because you didn't receive a Form 1099-B or Form 1099-DA (or substitute statement). Do not use box C to report digital asset transactions. Use box I.