Options Assignment Explained: What Happens When You Get Assigned and How to Handle It
Summary
Assignment occurs when a buyer exercises their option, obligating the seller to fulfill the contract. For call sellers, this means selling 100 shares at the strike price. For put sellers, this means buying 100 shares at the strike price. Assignment is a normal, expected part of options selling strategies, not an emergency. This guide explains when assignment happens, how to prepare your account, and why panic is almost never the right response.
Key Takeaways
Only about 7% of options are exercised before expiration, but nearly all in-the-money options are auto-exercised at expiration. Assignment on a covered call means you sold shares at a profitable predetermined price. Assignment on a cash-secured put means you bought shares at a price you previously agreed was attractive. In both cases, you keep all the premium you collected. Preparation and position sizing prevent assignment from becoming a problem.
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For most beginners, the word "assignment" triggers anxiety. The notification from your broker feels like something went wrong. In reality, assignment is the planned outcome in many cases, and even when it's unexpected, it's manageable with the right preparation.
When Assignment Happens
At Expiration (Automatic)
The OCC (Options Clearing Corporation) automatically exercises any option that is $0.01 or more in the money at expiration. If you sold a $100 call and the stock closes at $100.01 on expiration Friday, your call will be exercised and your shares will be sold at $100.
This process is automatic. You don't need to do anything, and you can't prevent it (except by closing the option before expiration).
Before Expiration (Early Assignment)
American-style options (which include all standard equity options) can be exercised at any time before expiration. Early assignment is uncommon (it happens on roughly 7% of contracts) but it's not random. It occurs most frequently in these situations:
Deep ITM calls near ex-dividend dates. If a call option's time value is less than the upcoming dividend, the call buyer may exercise early to capture the dividend. This is the most common early assignment scenario.
Deep ITM puts when interest rates are high. A put buyer who exercises early receives cash (from selling shares at the strike) that can earn interest. When the interest earned exceeds the put's remaining time value, early exercise makes economic sense.
Very deep ITM options near expiration. When an option has virtually no time value remaining, there's minimal cost to the buyer for exercising early.
What Happens in Your Account
Call Assignment (You Sold a Call)
You are obligated to sell 100 shares at the strike price.
If you own the shares (covered call): Your 100 shares are sold at the strike price. The premium you originally collected is yours to keep. Your proceeds are: strike price x 100 + premium received.
Example: You sold the AAPL $250 call for $3.50 when you bought shares at $240.
If you don't own the shares (naked call): You're now short 100 shares. You'll need to buy shares at the current market price to cover. This is why naked calls are dangerous: if the stock has risen significantly, your losses can be enormous.
Put Assignment (You Sold a Put)
You are obligated to buy 100 shares at the strike price.
If you have the cash (cash-secured put): Your cash is used to buy 100 shares at the strike price. The premium you collected lowers your effective cost basis.
Example: You sold the MSFT $400 put for $5.00.
If MSFT is currently trading at $390, you have a $500 unrealized loss on the shares but you paid $395 (not $400) thanks to the premium. You can now sell covered calls against these shares to continue generating income.
Why Assignment Is Usually Not a Problem
If you follow the core rule of premium selling strategies, assignment is a positive or neutral event:
For covered calls: You chose a strike price at which you'd be happy to sell. Assignment means your shares were sold at a predetermined profit. If you're unhappy about being assigned, you chose the wrong strike.
For cash-secured puts: You chose a strike price at which you'd be happy to buy. Assignment means you acquired shares of a company you wanted to own at a price you predetermined was attractive. If you're unhappy about assignment, you chose the wrong stock or strike.
The problem arises when traders sell options without intending to fulfill the obligation. Selling puts on a stock you don't actually want to own at the strike price means assignment will feel like a punishment instead of a plan.
Preparing for Assignment
Capital Requirements
Ensure your account can handle the assignment:
Covered calls: No additional capital needed. You already own the shares.
Cash-secured puts: Have the full cash amount reserved. If your $400 put is assigned, your account needs $40,000. Don't sell puts on margin unless you understand the margin call implications.
Spreads: If the short leg of a spread is assigned, you may temporarily hold shares until you exercise the long leg. This can create a temporary margin requirement. Close spreads before expiration to avoid this scenario.
Tax Implications
Assignment affects your tax situation:
Call assignment: Your shares are sold, creating a taxable event. The holding period of the shares (from purchase to assignment) determines whether the gain is short-term or long-term.
Put assignment: You've purchased shares, which starts a new holding period. Your cost basis is the strike price minus the premium received.
Wash sale risk: If you're assigned on a put and then sell the shares at a loss, buying a new put on the same stock within 30 days can trigger a wash sale.
How to Avoid Unwanted Assignment
Close or roll before expiration. If your short option is ITM and you don't want to be assigned, buy it back before the Friday close. Rolling to a later expiration lets you keep the position without assignment.
Monitor ex-dividend dates. If you've sold a covered call that's ITM near the ex-dividend date, early assignment risk is elevated. Roll the call or close it before the ex-date.
Don't sell options you can't fulfill. This is the most reliable way to "prepare" for assignment: only sell calls on shares you own and only sell puts when you have the cash to buy shares.
The Post-Assignment Playbook
After covered call assignment:
After put assignment:
This cycle of put selling, assignment, covered call selling, and potential call assignment is the core of the Wheel Strategy, which OptionsPilot's backtester can help you evaluate across historical market conditions.