Options income · Risk ledger
Covered Call break-even: how much does Premium protect?
Premium is a thin pad, not a crash barrier. The real question is not “how much did I collect?” but how much you lose if stock falls 10%, 30%, or to zero.
Write three formulas clearly
Assume you buy 100 shares at US$100 and sell one US$110-strike Call for US$3 per share. Discussion is expiry P&L only—ignoring commissions, taxes, dividends, and early assignment.
| Item | Formula | This example |
|---|---|---|
| Break-even | Stock cost − Premium | US$97 |
| Max profit at expiry | (Strike − stock cost + Premium) × 100 | US$1,300 |
| Loss if stock → 0 | (Stock cost − Premium) × 100 | US$9,700 |
Easy to miss: collecting US$300 does not mean you only risk US$300. Behind this Covered Call is still a US$10,000 stock position; Premium only moves expiry break-even from US$100 to US$97.
Three downside stress tests
| Expiry price | Stock P&L | After Premium | Outcome |
|---|---|---|---|
| US$105 | +US$500 | +US$800 | Call may not be assigned; overall still profitable |
| US$90 | −US$1,000 | −US$700 | Premium offsets only part of the drop |
| US$60 | −US$4,000 | −US$3,700 | Principal risk far exceeds Premium |
If stock rises to US$140, unrealised stock gain would be about US$4,000—but the short Call roughly caps expiry profit near US$1,300. That is not “free extra income”; it is cash today in exchange for some upside.
Old holdings: do not use original cost alone
If you bought at US$40 years ago and the stock is now US$100, using US$40 as “cost” can distort the decision. Selling a Call today is a new upside-cap decision on an asset worth about US$10,000. Original cost answers historical P&L; mark-to-market, tax basis, and opportunity cost answer different questions.
Four checks before ordering
- If assigned, am I truly willing to sell these 100 shares at the strike?
- If stock falls 30%, how much does Premium offset—and is the residual loss tolerable?
- Is the position concentrated so one contract is already too large for the portfolio?
- Does the calc include spreads, commissions, taxes, and possible buyback cost?
FAQ
Does Covered Call equal 3% protection?
Only in this simplified expiry comparison with US$3 Premium on a US$100 start—about a 3% downside buffer. It is not a guarantee, and losses do not stop after 3%.
Is P&L identical before expiry?
No. Before expiry, Call price still reflects time, IV, rates, and dividends; buyback cost can differ from the expiry formula.
Is more Premium always better?
No. Higher Premium often comes with lower strikes, longer expiries, or higher volatility—trade-offs and risks change too.
Official: Options Industry Council: Covered Call. OIC notes break-even as starting stock price minus Premium; max loss can still be severe.
Verified: 11 Oct 2026. Educational examples only—not personal advice.
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