What a covered call actually is
A call option gives its buyer the right — but not the obligation — to buy 100 shares of a stock at a fixed price (the strike) before a set date (the expiration). When you sell a call, you collect a premium today in exchange for taking on the obligation to deliver those shares if the buyer chooses to exercise.
The call is covered when you already own the 100 shares you might have to deliver. That's what makes the strategy conservative: the worst case on the option side is that your shares get called away at a price you chose in advance.
How covered calls generate income
The premium hits your account the moment the order fills. From that point one of three things happens:
- The stock stays below the strike. The call expires worthless, you keep the premium, and you still own the shares. You can sell another call for the next cycle.
- The stock closes above the strike at expiration. The shares are called away at the strike price. You keep the premium plus any gain from your cost basis up to the strike.
- You close or roll early. You buy the call back (often for less than you sold it for) and either sell a new one further out in time or further from the price — a roll.
Repeated month after month, the premiums compound into a meaningful income stream on top of dividends and share appreciation up to the strike.
How to sell a covered call, step by step
- 1. Confirm you own 100 shares of an optionable stock or ETF in the same account. One contract covers exactly 100 shares.
- 2. Open the options chain for that ticker in your broker and look at the calls side.
- 3. Choose an expiration. Most income sellers use 20–45 days to expiration — long enough to collect meaningful premium, short enough that time decay works in your favor.
- 4. Choose a strike. Strikes above the current price (out-of-the-money) leave room for share appreciation. A common starting point is a strike with about a 0.20–0.30 delta, which roughly maps to a 20–30% chance of being assigned.
- 5. Place a sell-to-open order for one contract per 100 shares. Use a limit price at or near the mid of the bid-ask spread.
- 6. Manage the position. Many traders close the call once it has lost ~50–80% of its value, then sell a new one. If the stock rallies through your strike and you don't want assignment, you can roll up and out for a credit.
How much income to expect
Premium scales with implied volatility, time to expiration, and how close the strike is to the current price. As a rough yardstick on liquid US large-caps, slightly out-of-the-money monthly calls typically pay:
| Underlying profile | Monthly premium | Annualized |
|---|---|---|
| Low-vol blue chip (e.g. KO, JNJ) | ~0.5%–1% | ~6%–12% |
| Broad-market ETF (SPY, QQQ) | ~1%–1.5% | ~12%–18% |
| High-beta single name (e.g. NVDA, TSLA) | ~2%–4%+ | ~24%–50%+ |
Illustrative ranges only — actual premiums move with implied volatility and are not a forecast. Higher premium always reflects higher risk.
A simple worked example: you own 100 shares of a $50 stock and sell the 30-day $52.50 call for $0.75. You collect $75 immediately. If the stock stays under $52.50, you keep the $75 (1.5% on the share value, ~18% annualized) and repeat next month. If it closes at $55, your shares get called away at $52.50 — you still net the $75 premium plus the $250 of share appreciation up to the strike, but miss the move above $52.50.
Picking the right stocks
The best covered-call candidates share four traits:
- • Companies you would happily own for the long term anyway.
- • Liquid options — tight bid-ask spreads and meaningful open interest.
- • Enough implied volatility to make premiums worth collecting (a 52-week IV percentile of 25–60% is a common sweet spot).
- • A price you'd be comfortable selling at if the call is assigned.
Avoid selling calls right before earnings or known catalysts unless you've explicitly priced in the gap risk.
Risks and trade-offs
- Capped upside. If the stock rockets past your strike, you give up the gains above it. In a strong bull market, covered calls underperform buy-and-hold.
- Limited downside cushion. The premium offsets some of a decline, but not much. A 1% premium does not protect against a 10% drop.
- Assignment. Early assignment is uncommon but possible, especially around ex-dividend dates on deep ITM calls.
- Opportunity cost. Shares tied up under a call can't easily be sold or repurposed without unwinding the option.
Tax treatment in the US
Premiums from short equity calls are generally treated as short-term capital gains at ordinary income rates, regardless of how long you've held the underlying shares. If a call is assigned, the strike price plus premium received becomes the effective sale price of the shares for cost-basis purposes. Qualified covered calls have special rules that can preserve long-term holding periods on the underlying — confirm specifics with a tax professional.
Frequently asked questions
How do covered calls generate income?
When you sell a call against 100 shares you already own, the buyer pays you a cash premium up front for the right to buy those shares at the strike price before expiration. That premium is yours to keep whether the option is exercised, expires worthless, or you buy it back early.
How do I sell a covered call?
Own at least 100 shares of an optionable stock or ETF, open the options chain, choose an expiration (typically 20–45 days out) and a strike above the current price, then place a sell-to-open order for one call contract per 100 shares. Most brokers label the order type 'Covered Call' automatically.
How much income can I expect from covered calls?
On large-cap stocks, slightly out-of-the-money monthly calls typically yield 0.5%–2% of the share price in premium per cycle, which annualizes to roughly 6%–24% before taxes. Higher-volatility names pay more but cap more upside and carry larger drawdowns.
Are covered calls a good income strategy?
They work best on shares you would be comfortable holding or selling at the strike. In flat or modestly rising markets they add steady premium income; in strong bull markets they cap upside, and in sharp downturns the premium only offsets a small portion of the share loss.
How is covered call income taxed?
In the US, premiums from short calls are generally taxed as short-term capital gains at ordinary income rates, regardless of how long you've held the underlying shares. If the call is assigned, the strike plus premium becomes your sale price on the shares. Confirm specifics with a tax professional.