Capital gains on assigned shares
The holding period for shares delivered by an option starts the day after assignment, and premium on an option that simply expired is short-term capital gain no matter how long you were short it. Put those two rules together and a premium book is a short-term income strategy that happens to hold stock, which on the worked year meant 26.8 percent of the profit went in tax.
There is no long-term capital gains version of this strategy that does not involve holding the shares for a year, and the strategy is built to not hold shares for a year.
The clock starts after assignment
IRS Publication 550 (2025), Holding Period is one sentence and it settles the question: "Option exercised. Your holding period for property you acquire when you exercise an option begins the day after you exercise the option."
The 46 days you spent short the put do not count. The clock on the shares starts the day after they arrive.
Both call-aways, worked
From the running book. Two positions were assigned in cycle 3 and called away in cycle 5.
| AMD | MU | |
|---|---|---|
| Put strike, and the credit | $113, $278 | $89, $215 |
| Basis of the shares | $110.22, or $11,022 | $86.85, or $8,685 |
| Called away at | $123 | $94 |
| Call premium, added to the proceeds | $227 | $177 |
| Amount realized | $12,527 | $9,577 |
| Reported gain | $1,505 | $892 |
| Days held | 92 | 92 |
| Character | short term | short term |
| Extra tax against long-term treatment | $256 | $152 |
Ninety-two days. To reach long-term treatment those positions needed another 274 days, which is more than the entire year the book ran. Nothing about a 46-day cycle gets you near a one-year holding period, and that is structural rather than unlucky.
The $408 of extra tax across the two, at an assumed 32 percent against 15 percent, is 5.7 percent of the year's $7,168 gain. Both rates are assumptions of this example.
The premium rule people get wrong
IRS Publication 550 (2025), Table 4-3, Puts and Calls is blunt about written options that expire: "If you are not in the business of writing options and an option you write on stocks, securities, commodities, or commodity futures is not exercised (or repurchased), the amount you receive is a short-term capital gain."
Short term. Not "short term if you held it under a year." Always. A written option you held for 46 days and one you held for 400 days produce the same character of gain when they expire worthless.
Which removes an idea that sounds clever: selling long-dated options to get long-term treatment on the premium. It does not work. Cluster D covers the real reasons to choose an expiry, and tax character is not among them.
Where the year's $4,598 of premium actually went
Three places, and the split is not obvious from a brokerage statement.
| How the contract ended | Contracts | Premium | Treatment |
|---|---|---|---|
| Expired worthless | 39 | $3,606 | short-term capital gain, on its own |
| Put assigned | 5 | $588 | reduces the basis of the shares bought |
| Call exercised | 2 | $404 | increases the proceeds on the shares sold |
| Total | 46 | $4,598 |
Only $3,606 of the premium appears on the return as premium. The other $992 is folded into two share transactions, which is why a premium-only ledger cannot be reconciled to a tax return.
The tax bill on the year
Add it up.
- Expired premium: $3,606, short term.
- Share gains on the two call-aways: $2,397, short term.
- Taxable for the year: $6,003.
- At an assumed 32 percent: $1,921.
Against an account gain of $7,168, that is 26.8 percent of the year's profit, and every dollar of it at short-term rates.
And note the taxable figure is $95 less than the $6,098 of economic gain the book actually realized. That $95 is put premium sitting in the basis of shares still held at year end. Real cash, received, not yet taxable. The basis page follows it.
What this changes about the strategy
Not much, and the honest version of that is worth saying.
A premium book generates short-term income. So does a savings account. The comparison is not "premium selling against long-term buy and hold at 15 percent" unless you were genuinely going to hold for years, in which case the audit of this year against buy and hold is the argument to have, and tax makes the case worse for selling rather than better.
Two things do follow.
Tax-advantaged accounts change the arithmetic more than any strike selection does. Removing $1,921 from a $7,168 year is a larger effect than most of the decisions in this series. Whether your account permits the strategy is a question for your broker, and covered calls and cash-secured puts are more widely permitted in retirement accounts than naked positions.
The one long-term exception is shares you already held. If you owned 100 shares for two years and a covered call gets them called away, the share gain is long term; the call premium is folded into the proceeds and inherits that. Which is a reason to be careful about writing calls on appreciated long-term stock, since assignment realizes a gain you had been deferring, and there is one more trap: an in-the-money call can suspend the holding period that qualifies your dividends, per IRS Publication 550, Investment Income and Expenses.
This page explains mechanics and quotes the IRS publication it takes them from. It is not tax advice, it does not know your bracket, your state, your filing status or your other positions, and one sentence in your own situation can change the answer. Take the worked examples to whoever prepares your return.
OptionsKing scores every candidate strike on a deterministic 0 to 100 scale, blends that score with the return on the capital the trade ties up, and shows you the highest-ranked handful. There is no minimum score. How it works covers what the ranking does and does not tell you.
Questions people actually ask
When does the holding period start on shares from an assigned put?
The day after assignment. Publication 550: "Your holding period for property you acquire when you exercise an option begins the day after you exercise the option." Time spent short the put does not count.
Is options premium short-term or long-term capital gain?
Premium on a written option that expires is short-term capital gain regardless of how long the contract was open. Selling a longer-dated option to get long-term treatment on the premium does not work.
How much tax does a premium selling year cost?
On the worked book, $6,003 of taxable gain at an assumed 32 percent is $1,921, against an account gain of $7,168. That is 26.8 percent of the year's profit, all at short-term rates. Rates are assumptions of the example.
Can I get long-term treatment on a covered call position?
Only through the shares. If you already held them more than a year, a call-away produces a long-term share gain and the call premium is folded into the proceeds. The premium itself is never long term.
Sources
Rules and thresholds above were checked against these documents on August 4, 2026. Exchange and broker rules change. Confirm anything you are about to act on with your own broker.
Keep reading
Do the math on your own trade
Every price in this article is an illustrative worked example, not a quote. Read Taxes for sellers for the rest of the series, and the disclaimer before you act on any of it. Selling options carries real risk of loss, and the loss can be far larger than the premium you collected.