Reporting Options on Your Tax Return (Intro)

US brokers report many stock and option sales on Form 1099-B. Taxpayers summarize capital gains and losses on Schedule D and detail transactions on Form 8949 (or compatible software workflows). This guide introduces the flow so your trade log and broker statements make sense together.

The annual paperwork chain

1. You trade during the year; broker records dates, proceeds, and basis.
2. Broker sends 1099-B (often February) with consolidated and sometimes supplemental statements.
3. You (or your preparer) import or enter trades into tax software.
4. Software builds 8949 lines and rolls up to Schedule D.
5. Net capital gain or loss flows to Form 1040.

Options closes generally look like other securities sales on 1099-B, with possible adjustment codes when basis was unclear at sale.

What 1099-B shows

Typical fields per sale:

Field	Meaning
Description	Symbol, sometimes “OPTION” detail
Date acquired / sold	Holding period inputs
Proceeds	Sale amount
Cost basis	What broker thinks you paid
Gain/loss	Proceeds minus basis when basis known
Term	Short vs long when reported

When basis is missing, Box B or similar may flag basis not reported to IRS. You must supply basis from your records.

Options-specific wrinkles

Opening vs closing. Buying to open then selling to close is one round trip. Selling to open then buying to close is another. Each close is a taxable event when realized in a taxable account.

Expired options. Long options that expire worthless often show as sales with $0 proceeds and basis equal to premium paid. Short options that expire may show gain equal to premium received.

Assignments. May not appear as a simple option line; instead stock purchase or sale appears with adjusted basis. Reconcile assignment notices to 1099 lots.

Multi-leg spreads. Some brokers report each leg; others net spreads. Mismatches between your journal and 1099 are common on complex trades, fix with adjustment entries and documentation.

Wash sales. Broker may adjust loss deferrals on 1099-B; you still verify substantially identical purchases across accounts.

Schedule D in plain English

Part I: short-term capital gains and losses
Part II: long-term capital gains and losses

You net within each part, then combine. Capital loss deductions against ordinary income are capped annually; excess carries forward.

Recordkeeping checklist

• Download full-year trade CSV from broker in January.
• Save PDF 1099-B and any “supplemental” PDF explaining adjustments.
• Log assignments, splits, and ticker changes.
• Note IRA vs taxable so you do not double-count excluded trades.
• Keep ThetaViz exports as study aids, not primary tax records unless they match broker fills.

When to get professional help

Consider a CPA the first year you:

• Sell naked puts and take assignment
• Run index options or futures with Section 1256 reporting
• Have straddles across stock and options
• Trade in multiple taxable accounts with wash sale risk
• Receive corrected 1099s after filing

Software tips

• Map broker import carefully; duplicate rows create phantom gains.
• Split short vs long using broker term flags, then verify odd lots.
• Attach notes to adjustment rows explaining basis source.

Year-end checklist

Before you close your books for the calendar year, reconcile open positions at broker versus your spreadsheet. List every option still open on December 31. Those positions have no realized gain or loss yet, but they matter for planning January trades and wash sale windows. If you received a late assignment notice, confirm the stock lot basis landed in the right account. Mismatches between margin and cash accounts are a common source of missing cost basis on 1099-B.

Related guides

• Options and stock taxes overview
• Wash sale rule basics
• Short-term vs long-term capital gains

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ThetaViz provides educational tools only. This guide is not investment, tax, or legal advice. Prices, margin requirements, and tax rules change. Confirm details with your broker and qualified professionals before trading.