Options Tax Records: What to Keep and When to Get Help

Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026

Good options tax records connect each option to what it became: the premium behind every assigned or exercised position, the date and account of every repurchase near a losing sale, and any position you identified on the day you opened it. Those are exactly the details a 1099-B can miss, and IRS Publication 550 notes that a failure to keep adequate books and records can count as negligence for the accuracy-related penalty.

This is the last lesson in the tax module. It pulls together the earlier ones: How Options Are Taxed, Section 1256 Options and the 60/40 Rule, The Wash Sale Rule and Options and Covered Calls, Protective Puts and the Straddle Rules.

Why do options trades need careful records?

Publication 550 says you must know the basis of your property to determine whether you have a gain or loss on it. Options make basis harder to follow, because so much of what they do moves money into another position:

• Assignment and exercise move premium into a stock's basis or sale amount, so the option's own line may never show a gain or loss.
• Wash sales move a disallowed loss into a replacement's basis, and the replacement may be an option, or in another account.
• Straddles can defer a loss into next year and change holding periods.
• Section 1256 contracts open at year end are marked to market, so next year's result depends on this year's mark.
• Identification decides some outcomes and has deadlines: an identified straddle must be identified on your records before the close of the day you acquire it, and a married put must be bought the same day as its stock, with a short window for the identification itself (see the previous lesson).

What should you keep?

• Broker documents: trade confirmations, monthly statements and every Form 1099-B, including corrected ones, for each account.
• A link for every assignment and exercise: which option it came from, its premium, and the date, so the share basis or sale amount can be checked.
• Repurchases near losing sales: the date, account and position of anything you bought within 30 days before or after a loss, including in an IRA or a spouse's account.
• Identifications: what you identified, with what, and when, made when you open the position or within any window the rules allow, in records you would be comfortable showing someone else.
• Year-end values of any Section 1256 contracts you hold over the year end, from your broker's year-end statement; the 1099-B shows these contracts' results in aggregate.

Now imagine the records were only the two share trades at their strikes: bought at $4,000, sold at $4,300, a $300 gain. That is $210 short, exactly the two premiums. Whether your 1099-B already includes those premiums is something to check, not assume.

How should you check your 1099-B?

Your broker's Form 1099-B is the starting point, and the Form 8949 instructions say to report the proceeds it shows and, where it shows basis was reported to the IRS, that basis, making corrections in the adjustment columns. Three checks catch most option problems:

1. Assigned options: the Form 8949 instructions use code "E" for option premiums the 1099-B does not reflect in its proceeds or basis, such as call premium on called-away shares. Make sure each premium is counted once.
2. Wash sales: box 1g may not catch every wash sale (see the wash sale lesson). Compare your own list of repurchases, and use code "W" for any you have to add.
3. Section 1256 contracts: check that your index options are reported as Section 1256 contracts, whose result goes on Form 6781 rather than line by line on Form 8949.

When should you see a tax professional?

Publication 550 covers most of this, but it is written for every kind of investor at once. A professional who works with traders is worth the cost when:

• you may have wash sales between stock and options, across accounts, or into an IRA;
• you hedge stock with options and may have tax straddles, qualified covered calls or married puts;
• you have a net Section 1256 loss and are weighing the carryback election;
• you trade often enough that matching 1099-B lines to your records is a project; or
• you wonder whether you are a trader in securities. Publication 550 says that status requires seeking to profit from daily market movements, substantial activity, and continuity and regularity, and that calling yourself a day trader does not decide it.