Course · Lesson 6
Option premium: being paid to give someone a choice
An option seller is paid immediately for accepting an obligation later. The premium is real cash — and it is not interest, it is not a yield, and it is the smallest number in the trade.
Option premiums
The label above names the mechanism this lesson covers — one of the six ways money can reach you. Everything below describes that mechanism rather than any particular product: the contract behind the payment, what it costs to collect, how it is taxed in the US, and how it stops. That is what makes it worth learning once, because it stays true whichever wrapper you meet it in later.
What the buyer is paying for
An option is a right without an obligation. A call buyer may buy the shares at the strike price up to expiry; a put buyer may sell them at the strike. As the seller you take the other side of that choice: you must deliver, or buy, if the holder exercises.
The premium is paid at the moment of the trade, settles into your account, and is yours whatever happens afterwards. That immediacy is what makes the mechanism feel like income and is exactly why it is worth being precise about what it is.
What sets the size of the premium is time remaining, the distance between the strike and the current price, and expected volatility — the market's estimate of how far the shares might move. In other words you are being paid for uncertainty, and the payment is largest when uncertainty is highest, which is also when the obligation is most likely to bite.
What you give up: the covered call
Selling a call against shares you already own is the standard form. If the price finishes below the strike, the option expires and you keep both the shares and the premium. If it finishes above, the shares are called away at the strike: you keep the premium plus the gain up to the strike, and forgo everything above it.
Your downside is essentially unchanged. If the shares fall, you own the fall, reduced by the premium you collected. A covered call is not a hedge; the premium is a small cushion, not protection.
So the trade is describable in one line: you exchanged an unknown and unbounded upside for a known and bounded payment. Whether that exchange is worthwhile depends on outcomes nobody knows in advance, and this site does not make that call for anyone.
What you give up: the cash-secured put
Selling a put with the cash set aside to honour it is the mirror image. If the shares stay above the strike, the option expires and you keep the premium. If they fall below, you buy at the strike even when the market is far lower, at an effective cost of the strike less the premium received.
In the meantime the cash is committed for the life of the contract, earning whatever your broker pays on idle balances. That opportunity cost is part of the trade and is routinely left out of the arithmetic.
The shape is the same asymmetry as the covered call. The maximum gain is the premium; the loss on assignment is limited only by how far the shares can fall, which is all the way to zero.
Assignment: what actually happens
Listed US equity options are American-style, meaning the holder can exercise on any business day up to expiry rather than only at the end. Index options are frequently European-style and settle in cash instead of shares, which changes the mechanics entirely.
Early assignment on a short call becomes considerably more likely just before an ex-dividend date, when the dividend a holder would capture by exercising exceeds the time value they would throw away. Assignment itself is allocated through the clearing house and, from the seller's seat, arrives without warning.
Assignment is not just an accounting event. It sells shares you may have held for years, at a time you did not choose, realising whatever gain has accumulated and starting the tax clock again if you buy back in — with wash sale rules to consider if the position was at a loss. The shares that made the call 'covered' are also gone, so the whole position has to be rebuilt before it can be repeated.
Premium is not interest, and it is not a yield
Interest accrues under a contract that obliges someone to keep paying you. Premium is the proceeds of a sale you completed. Nothing is owed to you between trades, and if you stop selling, the income stops the same day — not at a maturity, not after a notice period, immediately.
Annualising a premium — turning one month's proceeds into a headline yearly percentage — assumes the sale can be repeated on the same terms all year. Option prices move with volatility, and the periods that pay the most are the periods in which assignment is most likely, so the assumption tends to fail in the direction that matters.
Because premium is compensation for taking risk rather than a return on capital lent, presenting it as a yield sets it next to numbers it does not belong beside. A bond coupon and an option premium can be the same size and are not the same kind of thing.
Funds package the same trade
Covered-call ETFs and option-income closed-end funds run this systematically and distribute the proceeds. The distributions can be large, and they are frequently characterised in part as return of capital, because option proceeds are not income in the ordinary tax sense.
The structural profile follows from the strategy rather than from the manager: full participation in declines, capped participation in strong rallies, and a net asset value that carries that asymmetry through a full cycle. Fees and the tax character of the distributions — often ordinary income — come out of the same pot.
One tax wrinkle is worth knowing because it is structural rather than seasonal: certain broad-based index options fall under a separate federal regime that splits gains between long-term and short-term regardless of how long they were held, and marks open positions to market at year end. It applies to the contract type, not to your intentions, and is worth confirming with a tax professional.
The risk sits in the position, not in the premium
Selling options requires broker approval, and the covered forms discussed here are the constrained ones: the shares or the cash are already committed. Uncovered selling is a different activity, with loss potential that is not bounded by anything you have set aside, and it is outside the scope of this course.
Even in the covered forms, the costs are not trivial. Commissions, the bid-ask spread on every roll, assignment and exercise fees, and the tax consequences of forced sales all reduce what actually reaches you, and they recur every time the position is re-established.
The honest summary is that the premium is the smallest and most certain number in the trade, and everything else about it is larger and less certain. That is a description of the mechanism, not a warning against it and certainly not a recommendation of it.
What to remember
- The premium is payment for an obligation: the buyer gets a right, and you must perform if they use it.
- A covered call gives up appreciation above the strike and provides no protection beyond the premium itself.
- A cash-secured put commits your cash and can leave you buying at the strike while the market is far below it.
- Early assignment is a real event, most likely around an ex-dividend date, and it forces a sale you did not schedule.
- Premium is proceeds from a completed sale, not interest and not a yield; annualising it assumes a repeatability nobody owes you.
Every income type that pays this way: Option premiums in the library →
Before moving on: the premium is payment for taking on an obligation. The buyer gets a right and you have to perform if they use it, which is why the premium is proceeds from a completed sale rather than interest or a yield. A covered call gives away the gains above the strike and cushions a fall only by the premium itself; a cash-secured put ties up your cash and can leave you buying at the strike while the market sits well below it. Annualising a premium assumes a repeatability nobody has promised.
Written for information only. Nothing in this course is investment, tax or legal advice, no lesson recommends buying or selling anything, and no figure here is a promise of what any income stream pays. US tax and regulation are described in general terms and change; verify anything that matters with a professional who knows your situation. Last updated Jul 29, 2026.