Last updated October 8, 2026. Broker policies checked the same day.

Your 2 call contracts at a $50 strike are worth $1,000 at the close. Exercising them would cost $10,000. If you don’t have it, your broker may sell them for you — or let them expire.

The quick truth: the “$0.01 rule” is OCC’s back-office procedure. What happens in your account depends on your broker’s policy, your cash or shares, and the instructions you give before your broker’s cutoff.

4 quick checks

Run these before anything else.

• Long call: do you have strike × 100 × contracts in cash or buying power?
• Long put: do you own 100 shares per contract (or could your account go short)?
• Short option: are you ready to be assigned — shares to deliver, or cash to buy?
• After 4 p.m.: could a price move change the outcome before the cutoffs?

→ Run the ITM Expiration Calculator

…and why most traders who are in the money sell instead of exercising.

What Happens When a Call Expires In the Money

If a stock or ETF call finishes at least $0.01 in the money, it will usually be exercised and you will buy 100 shares per contract at the strike price — unless you sell it first, your broker steps in, or you tell your broker not to exercise.

That “usually” carries a lot of weight. Exercise needs money. The Options Industry Council (OIC) says you need either the capital or the margin equivalent to exercise a long call.

The math is simple:

• Cash needed = strike × 100 × contracts.
• Intrinsic value = (stock price − strike) × 100 × contracts.

Take the opening example. Two $50 calls with the stock at $55. Exercising costs $50 × 100 × 2 = $10,000. You get 200 shares worth $11,000 at the close. The $1,000 difference is the intrinsic value.

What decides the outcome:

• You have $10,000 or more: OK TO EXERCISE The calls will likely be exercised. The shares typically show up the next business day.
• You don’t: SELL BEFORE CUTOFF Your broker may sell the calls before the close, or file a “do not exercise” (DNE) so they expire. See what brokers do.
• You don’t want the shares: Sell the calls, or give DNE instructions before your broker’s cutoff.

OIC also notes that some investors can sell exercised shares right away, while others must wait until they settle. That depends on your firm.

What Happens When a Put Expires In the Money

If a stock or ETF put finishes at least $0.01 in the money, it will usually be exercised and you will sell 100 shares per contract at the strike — which works cleanly only if you own those shares.

There are two very different cases.

• You own the shares (a protective put). Exercise sells them at the strike. One $40 put with the stock at $36 sells your 100 shares for $4,000 instead of $3,600. OK TO EXERCISE
• You don’t own the shares. Exercise would make you short 100 shares at $40. You would then have to buy them back at whatever the stock opens at next. SELL BEFORE CUTOFF

Many brokers won’t let an exercise create a short position unless your account can carry it. Robinhood, for example, won’t exercise into short stock unless a specific setting is turned on. Without the shares, expect your broker to sell the put or file a DNE.

The $0.01 Rule, Explained Correctly

The “$0.01 rule” is OCC’s exercise-by-exception threshold — an administrative shortcut between OCC and the brokerage firms that clear trades, not a promise about what happens in your account.

Here is how OIC describes it. At expiration, the Options Clearing Corporation (OCC) exercises options that are in the money by a set threshold — unless the clearing firm tells it not to. It saves firms from entering an instruction for every single contract.

The thresholds:

• Equity options: $0.01 in the money, in customer, firm, and market-maker accounts.
• Index options: $0.01 in the money, in all account types.
• The test: the difference between the strike and the underlying’s closing price.

Now the part most explainers skip. OCC Rule 805, Interpretation .02, says these thresholds are “not intended to dictate to clearing members which positions in customers’ accounts” must be exercised. OIC adds that your firm may use a different threshold than OCC’s.

The firm can always choose. It can decline to exercise an option that clears the threshold. It can exercise one that doesn’t. That is why OIC says people are wrong to call this “automatic exercise.” It is only automatic when nobody gives contrary instructions.

Not Enough Cash or Shares? What Brokers Do

If you can’t pay for (or deliver) the shares, many brokers act before you do: they may sell the option near the close, restrict the account, or file a do-not-exercise request so the option expires worthless.

The three common moves:

• Liquidate. The broker sells your option in the market, often in the last part of the session. You get whatever the bid is at that moment.
• Block or restrict. The broker won’t exercise into a position you can’t carry. Some restrict new trades if expiring risk isn’t managed.
• Do not exercise (DNE). If the option can’t be sold, the broker may tell OCC not to exercise it. The option expires worthless — even though it was in the money.

So yes, an in-the-money option can expire worthless. That happens when you, or your broker, submit a DNE.

If the exercise does go through without the money, it gets expensive. Schwab’s example: exercising a 55-strike call needs $5,500 per contract. Without that cash, the trader risks a margin call — usually with a tight deadline — and the broker may sell other positions to cover it.

SELL BEFORE CUTOFF The cleanest fix is usually yours to make: sell the option, add cash, or arrange a DNE before your broker’s deadlines. A forced sale near the close may get a worse price than you could have gotten earlier. Execution quality matters here; see Is Commission-Free Trading Actually Free?

Broker Cutoffs and Policies (Dated)

Every broker sets its own deadlines and risk actions, often earlier than the exchange’s 5:30 p.m. ET cutoff — so the cutoff that matters for you is your broker’s.

These are dated examples from each firm’s published help pages. They are not rankings. Policies change, so confirm with your broker.

Choosing or comparing brokers? Check the options expiration policy, not just the price. See Best Online Stock Brokers 2026. Moving an account with open options? They may not transfer cleanly — read Transfer Stocks to Another Broker Without Selling first.

Sell or Exercise? Don’t Throw Away Time Value

If the option still has time value, selling it usually captures more than exercising, because exercise pays only the in-the-money amount.

An option’s price has two parts. Intrinsic value is how far it is in the money. Time value is everything above that. Exercise collects the intrinsic part only. The time value disappears.

OIC’s example shows the gap.

OIC adds a useful point: if you actually want the stock, selling the option and using the proceeds to buy shares can come out ahead.

On expiration afternoon, time value is often small. Two things still matter:

• The bid. You sell at the bid, not the midpoint. Wide spreads eat into what you collect.
• Below parity. Sometimes the bid sits below intrinsic value. Then selling captures less than exercise would. Exercise still needs the cash or shares, and it exposes you to the next open.

This is why so few options get exercised. OIC says that, historically, more than 72% of contracts are closed before expiration, 22% expire worthless, and only 6% are exercised.

The decision path, step by step

1. Where is the price? Is the option in the money, or within about $0.25 of the strike? If it’s far out of the money, a long option will likely expire worthless.
2. Is it an index option? If yes, it’s CASH-SETTLED. No shares change hands. Skip to the index section.
3. Did you sell it? If yes, you carry ASSIGNMENT RISK. Your choice is buy to close or accept assignment. See assignment.
4. Do you want the stock position exercise creates? If no, go to step 6.
5. Can you fund it? Strike × 100 × contracts for a call; 100 shares per contract for a put. If no: SELL BEFORE CUTOFF. If yes, compare the bid with intrinsic value. If they’re about equal: OK TO EXERCISE.
6. Don’t want the position? Sell before your broker’s cutoff. If you can’t sell, ask about a DNE before the DNE cutoff (stock and ETF options only at many brokers).

What Happens Between 4:00 and 5:30 p.m. ET

Stock options stop trading at 4:00 p.m. ET, but exercise decisions continue until the cutoffs — your broker’s first, then the exchanges’ 5:30 p.m. ET (4:30 p.m. CT) deadline for exercise notices.

The closing price decides whether an option is in or out of the money. Some ETF and index options trade until 4:15 p.m. ET on regular days, but Public notes that PM-settled index options stop at 4:00 p.m. ET on expiration day; check your contract’s expiration-day hours. Meanwhile, the stock keeps trading after hours. News after 4 p.m. can make an out-of-the-money option worth exercising, or an in-the-money one worth abandoning.

1. 2:00–3:30 p.m.Broker risk actions may start for underfunded positions.
2. 4:00 p.m.Stock options stop trading. The close sets ITM or OTM.
3. 4:30–5:30 p.m.Broker DNE and exercise cutoffs (they vary).
4. 5:30 p.m.Exchange cutoff for exercise notices (4:30 p.m. CT).
5. Next business dayExercises and assignments post to accounts.

If You Sold the Option: Assignment Explained

If you sold an option that finishes in the money, expect assignment: a short call delivers 100 shares per contract at the strike, and a short put buys 100 shares per contract at the strike.

How it works: OCC assigns exercises randomly to clearing firms. Each firm then allocates them to its customers. E*TRADE, for example, says it allocates on a random basis. OIC suggests asking your broker how it does this.

Short call assigned

• Covered (you own the shares): your shares are sold at the strike. You keep the premium you collected.
• Uncovered: you become short 100 shares per contract. You’d have to buy them back at market, possibly after a gap.

Short put assigned

• You buy 100 shares per contract at the strike. You need strike × 100 × contracts in cash or margin.
• The shares may be worth less than you paid. The premium you collected offsets part of that.

Surprises

• Out-of-the-money assignment. A holder can exercise an option that closed out of the money, for example after an after-hours jump.
• Missing assignment. An in-the-money short may not be assigned if the holder files a DNE. Robinhood notes you could then wake up long or short stock you expected to be gone.
• Early assignment and dividends. Call holders may exercise before the ex-dividend date to capture the dividend. OIC says an assigned call writer must deliver the stock plus the dividend.
• Trading halts. Depending on timing, options on a halted stock may be removed from exercise-by-exception processing.

Spreads at Expiration: When One Leg Is ITM

A spread protects you only while both legs exist; if one leg finishes in the money and the other doesn’t, you can end up holding 100 shares per contract that nothing hedges.

Take a hypothetical 50/55 bull call spread: long the $50 call, short the $55 call.

• Stock closes at $57: both legs are in the money. The long call is exercised (you buy at $50) and the short call is assigned (you sell at $55). They usually offset.
• Stock closes at $52: only the long $50 call is in the money. It will likely be exercised. You need $5,000 per spread, or your broker acts.
• Stock closes at $55.00: the short call sits right at the strike. You won’t know until the next day whether you were assigned. That is pin risk.

E*TRADE flags a tricky version: the long leg is in the money by less than $0.01 while the short leg is in the money by more. Example: short a $50 call, long a $55 call, stock closes at $55.00. The short call is likely assigned, but the long call isn’t exercised by default — so you could wake up short 100 shares unless you give exercise instructions.

Calendar spreads add another wrinkle. OIC says that if you plan to meet an assignment by exercising your long call, tell your broker and give exercise instructions.

Public notes that closing each leg separately can be faster than a multi-leg order, because a multi-leg order needs liquidity in every leg. ASSIGNMENT RISK applies to any short leg near its strike.

0DTE and Index Options

0DTE options follow the same expiration rules as any option on its last day — but most index options are European-style and cash-settled, so no shares change hands.

0DTE means “zero days to expiration”: the option expires the day you trade it. It’s a big market. The listed options industry averaged 72.8 million contracts a day in Q2 2026, up more than 19% from a year earlier, per Cboe’s Q2 2026 State of the Options Industry. SPX 0DTE contracts set a monthly record of 3.4 million a day in September 2026, per Cboe’s September volume report. Same-day trading has grown as rules changed; see The $25,000 Day Trading Rule Is Gone.

For a 0DTE stock or ETF option, everything above applies — just compressed into hours. Broker risk actions still start mid-afternoon.

Index options work differently. OIC says most, but not all, are European-style: you can only exercise at expiration. You can still sell any time before trading stops. OIC also warns that the last trading day for some European-style index options is typically the Thursday before expiration — that applies to AM-settled contracts, not PM-settled ones.

CASH-SETTLED SPX is the clearest example. Per Cboe’s specifications:

• Standard monthly SPX (AM-settled): trading usually stops the business day before the settlement value is calculated — usually a Thursday. Settlement uses a value calculated from the next morning’s opening prices.
• SPXW (PM-settled, including weeklies and 0DTE): trading stops at 4:00 p.m. ET on expiration day. Settlement uses the closing value.

One practical difference for 0DTE traders: with an AM-settled contract, you won’t know the settlement value until the next morning. An overnight move can change the result after trading has stopped. With a PM-settled contract like SPXW, the 4:00 p.m. close decides it, and after-hours moves don’t change the cash settlement.

Taxes and Cost Basis After Exercise

Exercising an option usually isn’t a taxable sale on its own; the option’s cost or premium rolls into the stock trade it creates.

Under IRS Publication 550:

• You exercise a call: add the call’s cost to the basis of the stock you bought.
• You exercise a put: reduce the amount realized on the stock sale by the put’s cost.
• Your short put is assigned: reduce your basis in the purchased stock by the premium you received. Your holding period starts the day you buy the stock.
• Your short call is assigned: add the premium you received to the amount realized on the stock sale.
• You sell the option instead: it’s a capital gain or loss on the option itself.
• It expires worthless: the buyer has a capital loss; the writer’s premium is a short-term capital gain.

A hypothetical: you paid $1.20 for one $50 call and exercise it. Your basis in the 100 shares is $5,000 + $120 = $5,120, or $51.20 a share, before commissions.

Broad-based cash-settled index options such as SPX are generally Section 1256 contracts, which have their own rules (Pub. 550 covers them). Ask a tax professional about your situation. For holding periods and rates, see Capital Gains Tax 2026.

Expiration-Day Checklist

Most expiration surprises come from one missed step, so run this list early on expiration day.

• Check whether each option is in or out of the money, and how close it is to the strike.
• Check your cash (for calls) or shares (for puts).
• Decide: sell, exercise, or do not exercise.
• Know your broker’s cutoff — and when its risk desk starts acting.
• Close short legs at risk of unwanted assignment.
• Watch for after-hours news on the underlying.
• Review exercise and assignment notices the next morning.

Questions to ask your broker

• What’s your exercise and DNE cutoff on expiration day?
• What do you do if I’m underfunded — and when?
• What threshold do you use for exercise?
• How do you allocate assignments?
• Do index options allow DNE?

FAQ

Short answers to the questions traders ask most on expiration day.

What happens when a call expires in the money?

If it’s a stock or ETF call at least $0.01 in the money, it’s usually exercised and you buy 100 shares per contract at the strike. If you can’t pay, your broker may sell it or file a DNE.

What happens when a put expires in the money?

It’s usually exercised and you sell 100 shares per contract at the strike. Without the shares, you’d go short — so many brokers sell the put or file a DNE instead.

Do options exercise automatically?

Not strictly. OCC uses exercise by exception, with a $0.01 threshold, but firms can override it and so can you. OIC says calling it “automatic” is incorrect.

What if I don’t have enough money to exercise?

Your broker may sell the option near the close, restrict the account, or submit a DNE. If an exercise goes through anyway, you may face a margin call.

Can an in-the-money option expire worthless?

Yes. If you or your broker submit a do-not-exercise request, it expires worthless even though it was in the money.

Will my broker sell my option for me?

Often, if you’re underfunded. Timing varies: E*TRADE says about two hours before the close, Public from 3:30 p.m. ET, Robinhood in the last 30 minutes (as of October 8, 2026).

What time do options expire?

Stock options stop trading at 4:00 p.m. ET on expiration day (AM-settled index options like monthly SPX usually stop the day before). Exercise decisions continue until your broker’s cutoff and the exchanges’ 5:30 p.m. ET deadline.

Can I exercise after 4 p.m.?

On expiration day, often yes — until your broker’s cutoff. Some brokers only accept late requests through support, on a best-effort basis.

What’s a “do not exercise” request?

It’s an instruction not to exercise an option that would otherwise be exercised. The option expires worthless. Many brokers offer it only for stock and ETF options.

Should I sell or exercise?

It’s a tradeoff. Selling captures intrinsic value plus any time value, minus the spread. Exercise captures only intrinsic value and requires cash or shares. Compare the bid with intrinsic value.

Can I sell an option on expiration day?

Yes, until trading stops — but some brokers cancel orders or stop accepting them earlier. Public, for example, cancels pending same-day stock/ETF option orders at 3:30 p.m. ET.

What happens if I’m assigned on a short call?

You must deliver 100 shares per contract at the strike. If you don’t own them, you become short the stock.

What happens if I’m assigned on a short put?

You must buy 100 shares per contract at the strike, using cash or margin.

Can an out-of-the-money option be assigned?

Yes. A holder can exercise an option that closed out of the money, for example after an after-hours move.

What happens to my spread if one leg is ITM?

The ITM leg is exercised or assigned on its own. You may be left with an unhedged stock position the next day.

What is pin risk?

The risk that the stock closes at or near your short strike, so you can’t know whether you’ll be assigned until the next business day.

What happens to 0DTE options at expiration?

The same as any expiring option. Stock and ETF 0DTE options settle in shares; index 0DTE options settle in cash.

Are index options cash-settled?

Most are, including SPX. No shares change hands; your account is credited or debited the in-the-money amount × 100.

What’s the difference between SPX and SPY at expiration?

SPY options are American-style and settle in shares. SPX options are European-style and settle in cash. Standard monthly SPX stops trading the business day before settlement, usually Thursday.

Do I pay tax when my option is exercised?

Usually not at exercise itself. The option’s cost or premium adjusts the stock’s basis or sale amount, and tax follows when the stock is sold.

How is cost basis calculated after exercise?

For an exercised call: strike × shares + what you paid for the call. For an assigned short put: strike × shares − the premium you received.

Why was I assigned early?

Often because the call had little time value left and a dividend was coming. Holders may exercise before the ex-date to capture it.

Sources

• OIC — Options Exercise FAQ (exercise by exception, OCC Rule 805 Interp. .02, cutoffs, statistics, sell-vs-exercise example)
• OCC — Characteristics and Risks of Standardized Options
• Robinhood — Expiration, exercise, and assignment
• Public — Understanding option expiration, exercise, and assignment
• E*TRADE — Expiration Process and Risks
• Schwab — Options Exercise, Assignment, and More: A Guide
• Cboe — SPX options specifications
• Cboe — State of the Options Industry, Q2 2026
• Cboe — Trading volume for September 2026
• IRS — Publication 550

Related reading: Why Did My Stop-Loss Sell Below My Stop Price? — how order types behave when you’re racing a deadline.

This article is for education only. Options involve risk and are not suitable for all investors. Before trading options, read the Characteristics and Risks of Standardized Options. All examples are hypothetical. Broker policies vary and were verified on October 8, 2026; confirm current rules with your broker. Nothing here is investment, tax, or legal advice, or a recommendation to buy, sell, exercise, or hold any security.