Assignment occurs when an option buyer exercises their contract, and the seller (writer) must fulfill the obligation. If you sold a call, assignment means you must sell 100 shares at the strike price. If you sold a put, assignment means you must buy 100 shares at the strike price. Assignment is the other side of the exercise coin — every exercise triggers an assignment.

How Assignment Works: Step by Step

  • An option buyer decides to exercise their contract (or it auto-exercises at expiration)
  • The OCC (Options Clearing Corporation) randomly selects an account that has a matching short position
  • The selected seller's broker notifies them of the assignment
  • Shares and/or cash are transferred according to the contract terms
  • The option position is closed

    • You'll typically see the assignment reflected in your account the next morning. Monday mornings after expiration Friday are common — you log in and find 100 new shares (or 100 fewer shares) with a corresponding cash adjustment.

    Assignment on a Covered Call

    Scenario: You own 100 shares of AAPL at $185 and sold a $195 call for $3.00. AAPL rises to $200 and your call is assigned.

    What happens:

  • Your 100 shares are sold at $195 (the strike price)
  • You receive $19,500
  • You keep the $300 premium you collected
  • Total proceeds: $19,800 on shares you bought for $18,500
  • Profit: $1,300 ($10/share gain + $3/share premium)

    • Is this bad? You missed out on the move from $195 to $200 ($500 in additional gains), but you still made a profit. This is the trade-off of covered calls — you cap your upside in exchange for guaranteed income.

    Assignment on a Cash-Secured Put

    Scenario: You sold a $145 put on AMD for $4.00 with $14,500 in cash set aside. AMD drops to $138.

    What happens:

  • You must buy 100 shares of AMD at $145
  • Cost: $14,500 debited from your account
  • You keep the $400 premium
  • Effective purchase price: $141 per share
  • Shares are currently worth $138 — a $300 unrealized loss

    • If you wanted to own AMD anyway, this is fine. You bought at $141 (effectively) instead of the original $155 where it was when you sold the put. The premium provided a $4 cushion.

    When Does Assignment Happen?

    At expiration: Any option ITM by $0.01+ is auto-exercised and the corresponding seller is assigned. This is the most common assignment scenario.

    Before expiration (early assignment): Less common but possible with American-style options. Typically happens when:

  • A call is deep ITM right before the stock's ex-dividend date. The call buyer exercises to capture the dividend.
  • A put is deep ITM with very little time value remaining. The put buyer exercises to receive cash sooner.
  • Time value is near zero, making exercise economically rational.

    • Rule of thumb: If the extrinsic value of your short option drops below the upcoming dividend (for calls) or below $0.05 (for puts), early assignment becomes likely.

    How to Avoid Assignment

    You can't prevent assignment entirely, but you can minimize surprises:

  • Close positions before expiration if the option is near the money.
  • Roll the position to a later expiration to extend the trade.
  • Monitor ex-dividend dates for early assignment risk on sold calls.
  • Keep enough cash/shares to fulfill the obligation. If you sell a $50 put, make sure you have $5,000 available.

    • Being assigned without sufficient capital forces your broker to liquidate other positions or issue a margin call. Always trade within your means.

    Assignment Fees

    Most major brokers charge $0 for assignment (Fidelity, Schwab, Robinhood, Tastytrade). Some smaller brokers charge $10–$20. Check your broker's fee schedule.

    Practical Perspective

    Assignment isn't a disaster — it's a planned outcome. When you sell a covered call, assignment means you sold shares at a price you chose in advance. When you sell a cash-secured put, assignment means you bought a stock at a price you were comfortable with. OptionsPilot helps you pick strike prices where you're happy with either outcome, making assignment a non-event rather than a surprise.