How Options Are Taxed: Premium, Expiration, Exercise and Assignment
Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026
In this lesson
Describe how U.S. federal tax rules treat an option's premium for buyers and writers, and what each way an option can end does to the gain or loss and to stock basis.
For most individual traders, a stock or ETF options trade produces a capital gain or loss, and the premium is not taxed when it changes hands: it becomes part of a result only when the option is closed, expires, or is exercised or assigned. Which of those four endings happens decides whether the option has a gain or loss of its own or is folded into a stock trade.
General education, not tax advice. This module describes U.S. federal income tax rules for individual investors in general terms, mainly from IRS Publication 550 (the 2025 edition, for 2025 returns) and the Internal Revenue Code. Tax rules change, state rules differ, and your situation may not match these examples. Consult a qualified tax professional before acting on anything here.
This is the first lesson of the tax module, and it covers equity options, meaning options on a single stock or on most ETFs. The next lesson, Section 1256 Options and the 60/40 Rule, covers the index options that follow different rules.
Are options taxed as capital gains?
Usually, yes. Publication 550 says gain or loss from the sale or trade of an option to buy or sell property that is a capital asset in your hands, or would be if you acquired it, is capital gain or loss. Stock held by an individual investor is normally a capital asset, so options on it normally produce capital results.
Capital gains and losses are long-term or short-term. Publication 550 sets the line at one year: property held more than one year gives a long-term result, and property held one year or less gives a short-term one. Most options are held for weeks or months, so most option results are short-term. The rate that applies to each depends on your income and the tax year, so check the current IRS figures rather than relying on a number from an article.
When an option trade becomes a taxable result
Open
Premium paid or received; nothing reported yet
Holding
No result while open (Section 1256 aside)
Ends
Closed, expired, exercised or assigned
Result
Own gain or loss, or folded into the stock
How is premium treated for buyers?
If you buy a call or a put, Publication 550 says you may not deduct its cost: it is a capital expenditure. What happens next depends on how the option ends.
- You sell it before expiration. The difference between what you paid and what you received is a capital gain or loss, long-term or short-term depending on how long you held the option.
- It expires worthless. Its cost is a capital loss, and your holding period ends on the expiration date.
- You exercise a call. You add the call's cost to the basis of the shares you buy. There is no separate option gain or loss.
- You exercise a put. You reduce the amount realized on the shares you sell by the put's cost.
Buying a put on stock you already own can also affect that stock's holding period. The lesson Covered Calls, Protective Puts and the Straddle Rules covers that case.
How is premium treated for writers?
If you write (sell) an option, Publication 550 says not to include the premium in your income when you receive it. You carry it in a deferred account until the obligation ends:
- It expires. The premium you received is a short-term capital gain.
- You buy it back. The difference between what you received and what you paid to close is a short-term capital gain or loss, with exceptions when the option offsets stock you hold, covered in the straddle rules lesson.
- A put you wrote is assigned. You buy the shares, and you reduce your basis in them by the premium you received. Your holding period for the shares begins when you buy them, not when you wrote the put.
- A call you wrote is assigned. You sell the shares, and you add the premium to your amount realized. The gain or loss is long-term or short-term depending on how long you held the shares, which an in-the-money covered call can affect (see the straddle rules lesson).
Publication 550 states the short-term treatment of expired and bought-back written options for writers who are not in the business of writing options, which describes most individual traders.
Worked example
Example: four endings, and where the premium goes
All figures are hypothetical, per contract and before fees.
- Long XYZ 50 call bought for $2.00 ($200). Sold later for $3.50: a $150 capital gain. Left to expire worthless: a $200 capital loss. Exercised: no option gain or loss; the 100 shares cost $5,000 plus the $200 premium, a $5,200 basis, or $52 per share.
- Short XYZ 45 put sold for $1.50 ($150). Expires: a $150 short-term gain. Bought back for $0.40: a $110 short-term gain. Assigned: you buy 100 shares for $4,500, and the premium lowers your basis to $4,350, or $43.50 per share.
Illustrative and hypothetical. The ticker and prices are invented for teaching, and the figures exclude commissions, fees, margin interest and taxes, which reduce real results. Past or hypothetical outcomes do not indicate future results.
How exercise and assignment change the stock's cost basis
Short 45 put, assigned
Long 50 call, exercised
The assigned put shows why the endings matter. The $150 premium did not disappear and was not taxed by itself; it moved into the shares' basis, so it will show up in the gain or loss when you eventually sell them.
Where are options trades reported?
For options that are not Section 1256 contracts, Publication 550 says to report gain or loss from closing or expiration on Form 8949, which feeds Schedule D of Form 1040. Your broker's Form 1099-B lists the sales it reports to you and the IRS. Options Tax Records covers how to check it.
Two details from Publication 550 are worth knowing:
- For an expired option, Form 8949 records "Expired" in place of the sale price (for a bought option) or the cost (for a written one).
- If a call you wrote was assigned and your 1099-B's sales price does not include the premium, Form 8949 has an adjustment code for adding it.
Check your understanding
You sell an XYZ 55 call for $1.00 against 100 shares you own, and it is assigned. What is your amount realized on the shares?
Show answer
$5,600: the $5,500 strike price for 100 shares plus the $100 premium. Whether the gain is long-term or short-term depends on how long you held the shares.
You sell an XYZ put for $1.50 and later buy it back for $4.00. What is the result, before fees?
Show answer
A $250 short-term capital loss: you received $150 and paid $400 to close.
You buy an XYZ 60 call for $3.00, exercise it, and later sell the 100 shares at $65. What is your gain, before fees?
Show answer
$200. Your basis is $6,000 plus the $300 premium, $6,300, and the sale brings in $6,500.
Key takeaways
- Options on stocks and most ETFs usually produce capital gains and losses: short-term unless a bought option or the stock was held more than one year, and generally short-term for a written option that expires or is bought back.
- Premium is not taxed when it changes hands; it counts when the option is closed, expires, or is exercised or assigned.
- Exercise and assignment fold the premium into the stock: added to or subtracted from basis, or added to or subtracted from the sale amount.
- Equity option results go on Form 8949 and Schedule D; check them against your broker's 1099-B.
Common questions
Do you pay taxes on options that expire worthless?
If you wrote it, yes: Publication 550 treats the premium you keep as a short-term capital gain for writers not in the business of writing options. If you bought it, the result is a capital loss of its cost, with the holding period ending on the expiration date.
Is option premium taxed when you receive it?
No. Publication 550 tells writers not to include the premium in income when it is received. It is carried in a deferred account until the option expires, is closed, or is exercised, and only then does it become part of a gain or loss.
Are short options always short-term?
For a writer who is not in the business of writing options, Publication 550 treats premium kept at expiration, and gain or loss from buying the option back, as short-term. There are exceptions when the option offsets stock you hold: the lesson on covered calls and the straddle rules explains when such a loss can be long-term. If a written option is exercised, the premium joins the stock trade instead, and that trade follows the stock's holding period.
Do you pay tax on an option you exercise?
Exercise does not create a separate option gain or loss. Publication 550 says exercising a call adds its cost to the basis of the shares, and the gain or loss comes when you sell them. Exercising a put sells your shares, so the stock gain or loss is realized then, with the amount realized reduced by the put's cost.