Options Wash Sale Rule Explained with Real Examples

Summary

The wash sale rule disallows a tax loss if you buy a "substantially identical" security within 30 days before or after selling at a loss. For options, this applies not only to identical contracts but also to the underlying stock and sometimes to options on the same stock with different strikes or expirations. The disallowed loss gets added to the cost basis of the replacement position.

Key Takeaways

Wash sales affect options traders far more often than most realize. Selling a losing AAPL call and buying another AAPL call within 30 days triggers it. Selling AAPL stock at a loss and then selling a put on AAPL can also trigger it. The loss isn't gone permanently—it shifts to your new position's cost basis—but it can delay deductions significantly.

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I've seen traders shocked at their tax bill because $15,000 in realized options losses were disallowed by wash sales. The IRS doesn't send you a warning. Your broker might flag some wash sales on your 1099-B, but they miss cross-account transactions and many options-to-stock scenarios.

The Basic Rule

You sell a security at a loss. Within the 61-day window (30 days before through 30 days after the sale), you buy a "substantially identical" security. The loss is disallowed for tax purposes that year.

The disallowed loss gets added to the cost basis of the replacement purchase. You eventually get the benefit, but potentially in a different tax year.

Example 1: Same Option Contract

You buy 5 TSLA $250 calls expiring March 2026 for $12,000. On February 10, you sell them for $8,000, realizing a $4,000 loss. On February 25 (15 days later), you buy 5 TSLA $250 calls expiring April 2026 for $9,000.

Result: The $4,000 loss is disallowed. Your cost basis in the new April calls becomes $13,000 ($9,000 + $4,000 disallowed loss).

Example 2: Options and Stock Interaction

You own 100 shares of AMZN bought at $200. You sell on September 1 at $180 for a $2,000 loss. On September 15, you sell a cash-secured put on AMZN with a $175 strike.

Result: The IRS considers selling a put "substantially identical" to buying the stock because you're taking on the obligation to purchase. The $2,000 stock loss is disallowed and added to your put position's basis.

Example 3: Different Strikes, Same Underlying

This is where it gets murky. You sell an NVDA $500 call at a loss and buy an NVDA $520 call within 30 days. The IRS hasn't provided clear guidance on whether different strikes constitute "substantially identical" securities.

The conservative approach: Treat options on the same underlying as potentially triggering wash sales, especially when strikes are close together. Some tax professionals argue different strikes are distinct securities, but this isn't settled law. If you're trading actively, assume the IRS may challenge it.

The 61-Day Window

The window is 30 days before and 30 days after the loss sale, totaling 61 days. This means buying a replacement before you sell the losing position also triggers a wash sale.

Timeline example:

  • January 5: Buy MSFT $400 calls for $5,000
  • January 20: Buy more MSFT $400 calls for $3,000
  • February 1: Sell original calls for $3,500 (loss of $1,500)

    • The January 20 purchase is within 30 days before the February 1 loss sale. Wash sale triggered. The $1,500 loss is disallowed and added to the January 20 position's basis.

    Cross-Account Wash Sales

    Wash sales apply across all your accounts—brokerage, IRA, spouse's accounts (if filing jointly). Selling a losing SPY call in your taxable account and buying SPY shares in your IRA within 30 days triggers a wash sale. Worse, when the replacement is in an IRA, you can never recover the disallowed loss.

    How to Avoid Wash Sales

  • Wait 31 days before re-entering a similar position after a loss
  • Switch underlyings: Sell losing AAPL calls, buy MSFT calls instead
  • Use different ETFs: Sell losing SPY puts, buy IVV or VOO puts (though the IRS could still challenge this)
  • Switch strategy types: Sell losing long calls, switch to selling puts (debatable but commonly done)
  • Track with software: Use OptionsPilot to log your trades and monitor the 30-day windows across positions

    • What Your Broker Reports vs. What You Owe

    Brokers only track wash sales within the same account on identical securities. They won't catch cross-account wash sales, options-to-stock triggers, or "substantially identical" situations with different strikes. You're responsible for adjusting your own return. Tax software like GainsKeeper or TradeLog can help, but manual review is still necessary for complex options portfolios.