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Should you let an option expire worthless, or close it for pennies?

Letting a short option expire worthless keeps every cent of the premium and skips a fee. Most of the time, that works. But on the last day, a small move near the strike can flip the result, and after-hours moves can still lead to assignment. Closing for a few cents removes that tail.

Options guide · 9-minute read · Updated 2026-10-27

The short answer

If your short option is far out of the money on expiration day, letting it expire is usually fine. You keep the full premium and pay no closing fee.

If it's close to the strike, or news could move the stock, the last day carries real risk:

• Gamma risk: near expiry, a small stock move can swing the option from worthless to in the money in minutes.
• Pin risk: if the stock closes right at the strike, you may not know until after the weekend whether you were assigned.
• After-hours moves: option owners can usually still decide to exercise after the 4 p.m. close, based on late news.

Paying a few cents to close removes all three. Our habit: if it's near the strike, close it for pennies.

Why the last day is different

Early in a trade, a $1 move in the stock changes your option's price a little. On the last day, an at-the-money option's price can change a lot. That speed of change is called gamma, and it peaks right at expiry.

So an option worth $0.05 at 10 a.m. can be worth $0.60 by 3:30 p.m. after a $1 drop. There's no time left for that to settle back down. Our guide to theta decay shows the other half of the picture: the last days melt fastest, but they also swing hardest.

The worked example (an illustration, not a trade idea)

You sold a $50 put on a made-up stock, XYZ, for $0.90. You collected $90.

It's expiration Friday. At 10 a.m., XYZ is at $52. The put is quoted $0.03 bid / $0.05 ask. You could buy it back for $5 and keep $85. You decide to save the $5 and let it expire.

At 3:30 p.m., a headline hits the whole sector. XYZ closes at $49.60, 40 cents below your strike. The put is now in the money, and in-the-money options are usually exercised automatically at expiry. You're assigned: you buy 100 shares at $50.

Over the weekend, more bad news. Monday, XYZ opens at $47.

To save $5, the trade went from +$85 to −$210. And you now hold $4,700 of a stock you hadn't planned to buy this week.

Every last-day ending, side by side

Letting it expire wins by $5 in two rows. It loses $195 to $295 in the other two. You don't know in the morning which row you'll get.

The pin row is the strange one. XYZ closed 2 cents above your strike, so the put looked clear of assignment. But owners can usually submit exercise instructions until after the close; brokers set their own cutoffs. A late drop can make exercising worth it for them. You find out over the weekend or on Monday.

The pros and cons

Letting it expire: - Keeps the last few cents of premium. - Skips a closing fee, which matters on very cheap options. - Needs no action. - Carries gamma, pin and after-hours risk if the stock is near the strike.

Closing for pennies: - Costs a few dollars per contract, plus any fee. - Ends the risk completely, hours before the close. - Frees cash or shares right away for the next trade in the wheel strategy. - Some brokers cut or waive fees on very cheap buy-to-close orders. Check yours.

Our rule of thumb

Close it for pennies if any of these is true on expiration day:

1. The stock is within about a dollar, or a few percent, of your strike.
2. There's news, a market event or an earnings date nearby.
3. You don't want the shares this week (for a put), or don't want to sell them (for a covered call).
4. You won't be watching the market that afternoon.

Let it expire if it's far out of the money, nothing is scheduled, and the cost to close is more than the risk is worth to you.

The same thinking applies to covered calls: a late jump through your strike means your shares are called away. If you'd be fine with that, waiting is less of a problem.

If you do get an assignment you didn't expect, read assignment mistakes before acting on Monday morning.

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