How many times has an option I sold been assigned early, and what has it cost me?

Logs each early option assignment during a chosen tracking period, along with its dollar cost, and tracks the running count and total cost against a stated tolerance.

How is this calculated?

Each logged entry records a note and a dollar cost. The tracker sums the count and total cost of entries logged during the current tracking period and compares the count against the tolerance set at the start of that period.

Early Assignment Occurrence Tracker

Set Your Tracking Period

Set this once at the start of your tracking period. Logging an assignment on the right resets your running log for a new period.

Your Result

Set your tolerance on the left to start logging early assignments as they happen.

How this is calculated

Early assignment can happen on a short option before expiration, most commonly on an in-the-money call right before an ex-dividend date, or on a deep in-the-money option close to expiration.
Logging the dollar cost each time it happens, such as unexpected margin interest, an unplanned stock position, or a wider bid-ask spread on the unwind, builds an actual record instead of a vague sense that this happens often.
This tracker resets when you set a new tracking period. Note your running total elsewhere if you want a permanent record.
Use it alongside the early assignment risk checklist below to catch the risk before it becomes a logged cost.

Risk & liability disclaimer: This calculator produces a mathematical estimate based on the numbers you enter. It is not financial advice and does not guarantee any trading outcome. Trading involves risk of loss, and past position sizing decisions do not predict future results. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any broker, exchange, or data provider. We do not guarantee this tool is error-free or suitable for your situation - always verify results independently and consult a licensed professional before making any trading or financial decision. You could lose some or all of the capital you trade with.

How many times has an option I sold been assigned early, and what has it cost me?

Set Your Tracking Period

Your Result

How this is calculated

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