How to Calculate Your Break-Even Price After Selling a Covered Call

The Short Answer: One Formula Does the Job

Your break-even price after selling a covered call equals your original cost basis in the stock minus the premium you collected. That single subtraction tells you the exact price at which you neither make nor lose money on the combined position. If the stock closes above that number at expiration, you are profitable. If it closes below, you have a loss.

For example, if you paid $170 per share for Apple (AAPL) and you sold a covered call and collected $3.50 per share in premium, your new break-even is $170.00 − $3.50 = $166.50. The call premium acts like a partial refund on your purchase price.

Breaking Down the Formula Step by Step

The formula looks like this:

Break-Even Price = Stock Cost Basis − Call Premium Received

Each piece matters, so let's define them clearly.

**Stock Cost Basis** is what you actually paid per share, including any commissions you paid to buy the stock. If you bought 100 shares of AAPL at $170.00 and paid a $1.00 commission, your cost basis is $170.01 per share. Most brokers display this in your positions tab.

**Call Premium Received** is the per-share credit you collected when you sold the call option. Options trade in contracts of 100 shares, so a premium quoted at $3.50 means you collected $350 in cash for one contract. For the break-even formula, use the per-share figure ($3.50), not the total dollar amount.

**Commissions on the option sale** reduce your net premium. If your broker charged $0.65 to sell the contract, your net premium is $3.50 − $0.0065 ≈ $3.49 per share. On small premiums, this matters more than traders expect. FINRA requires brokers to disclose all commissions and fees, so check your trade confirmation.

Full Worked Example Using AAPL

Let's walk through a complete, realistic trade.

**Setup:** - You own 100 shares of Apple (AAPL), purchased at $172.50 per share. - AAPL is currently trading at $178.00. - You sell one AAPL covered call with a $185 strike price expiring in 30 days. - The call premium is $2.80 per share ($280 total for the contract). - Your broker charges $0.65 per contract to sell the option.

**Step 1 — Net premium per share:** $280.00 − $0.65 = $279.35 total, or $2.7935 per share. We'll round to $2.79.

**Step 2 — Break-even price:** $172.50 − $2.79 = $169.71 per share.

**What this means in plain English:** AAPL would have to fall from $178.00 all the way to $169.71 before you lose a single dollar on this position. That is a buffer of $8.29 per share, or about 4.7% of the current stock price. The Options Industry Council (OIC) calls this the "downside protection" provided by the premium.

**Step 3 — Maximum gain:** If AAPL closes at or above $185 at expiration, your shares get called away at $185. Your profit per share is: ($185.00 − $172.50) + $2.79 = $15.29 per share, or $1,529 on the 100-share contract.

**Step 4 — Maximum loss:** The worst case is AAPL going to zero. Your maximum loss per share is your break-even price: $169.71. In practice, you would likely close the position long before that.

What Happens to Break-Even When You Bought the Stock at Different Times?

Many covered-call sellers own stock they bought months or years ago at various prices. The math is the same — you just need the correct cost basis for each lot.

Suppose you own 200 shares of Microsoft (MSFT). You bought the first 100 shares at $310 two years ago and the second 100 shares at $390 six months ago. You sell two covered-call contracts on the full 200 shares at a $420 strike for $4.10 per share.

- Lot 1 break-even: $310.00 − $4.10 = $305.90 - Lot 2 break-even: $390.00 − $4.10 = $385.90

Your two lots have very different risk profiles even though you sold the same call. Lot 1 has $84.10 of downside cushion from the current price (assuming MSFT is near $390). Lot 2 has only $4.10 of cushion. This is why tracking cost basis by lot is not just a tax exercise — it is a risk-management tool.

The IRS requires you to identify which shares are being called away if assignment occurs, and the default is often FIFO (first in, first out) unless you specify otherwise. The CRA applies similar rules for Canadian investors under adjusted cost base (ACB) accounting. Talk to a tax professional before assuming which lot gets assigned.

Risks You Need to Know Before You Rely on This Number

The break-even calculation is simple, but it does not tell the whole story. Here are the honest risks.

**You cap your upside.** Once you sell the call, you cannot participate in gains above the strike price. If AAPL rockets from $178 to $210, you still sell at $185. The break-even formula does not show you what you gave up.

**The stock can fall further than your buffer.** A $2.79 premium on a $178 stock is a 1.6% buffer. A 10% or 20% drop still leaves you with a large unrealized loss. The premium softens the blow but does not eliminate stock risk. The SEC reminds investors that covered calls do not protect against large declines.

**Early assignment is possible on American-style options.** Most equity options in the US are American-style, meaning the buyer can exercise at any time before expiration, not just on the expiration date. If the stock pays a dividend and the call is deep in the money, early assignment before the ex-dividend date is common. The OIC covers this scenario in detail in its options education materials.

**Taxes can change your real break-even.** If your shares are called away, the premium you collected is added to your sale proceeds for tax purposes, which affects your capital gain or loss calculation. Short-term vs. long-term holding periods matter. The IRS Publication 550 covers options tax treatment. Canadian investors should consult CRA guidance on options income.

**Bid-ask spread affects your real premium.** The premium you see quoted is the midpoint. You will almost always fill closer to the bid when selling. A call quoted at $2.80 bid / $3.00 ask might fill at $2.82, not $2.90. Use the actual fill price in your break-even calculation, not the midpoint.

A Quick-Reference Table for Different Premium Levels

To make this concrete, here is how different premium levels affect break-even on a stock purchased at $100.00 per share:

| Premium Collected | Break-Even Price | Downside Buffer | |---|---|---| | $0.50 | $99.50 | 0.5% | | $1.00 | $99.00 | 1.0% | | $2.50 | $97.50 | 2.5% | | $5.00 | $95.00 | 5.0% | | $10.00 | $90.00 | 10.0% |

Higher premiums come from higher implied volatility, longer time to expiration, or strikes closer to (or below) the current stock price. Each of those factors also carries trade-offs. A deep in-the-money call that pays a $10 premium on a $100 stock almost guarantees assignment and caps nearly all your upside. There is no free lunch — the premium always reflects the probability and risk the market is pricing in.

How to Track This Number Ongoing

Your break-even price changes every time you sell a new covered call on the same shares. Keep a simple running log:

1. Start with your original cost basis per share. 2. After each covered call you sell, subtract the net premium from the running total. 3. Your new running break-even is your updated cost basis for risk-management purposes.

Example: You bought NVDA at $480. You have sold three rounds of covered calls so far, collecting $6.20, $4.80, and $5.50 per share (net of commissions). Your running break-even is now $480 − $6.20 − $4.80 − $5.50 = $463.50. You have reduced your effective cost basis by $16.50 per share over time.

Note that this running break-even is for your own risk tracking. It is not the same as your IRS or CRA cost basis for tax reporting, which follows specific accounting rules. Keep the two calculations separate.

What is the break-even price formula for a covered call?

Break-even price equals your stock cost basis minus the net call premium you received per share. For example, if you paid $150 for a stock and collected $3.00 in premium, your break-even is $147.00. This is the price at which your total position — stock plus option — shows zero profit or loss at expiration.

Does selling a covered call lower my cost basis for tax purposes?

Not directly, according to IRS Publication 550. The premium you collect is not immediately applied to your stock cost basis; it is held as an open obligation until the option expires, is closed, or results in assignment. If the option expires worthless, the premium is typically treated as a short-term capital gain. Consult a tax professional for your specific situation, and Canadian investors should review CRA guidance on options.

How do I calculate break-even if I sold multiple covered calls on the same stock?

Subtract each net premium you collected from your original cost basis, one at a time, to get a running break-even price. If you bought shares at $200 and have collected $2.50, $3.00, and $1.80 in separate covered-call rounds, your current risk-management break-even is $200 − $2.50 − $3.00 − $1.80 = $192.70. Keep this separate from your official tax cost basis.

What happens to my break-even if I get assigned early?

Early assignment means your shares are sold at the strike price before expiration. Your profit or loss is calculated as the strike price plus the premium you collected, minus your original cost basis. The break-even concept still applies — you just realize the outcome sooner than expiration day. American-style equity options can be assigned at any time, as noted by the Options Industry Council (OIC).

Is the break-even price the same as my maximum loss on a covered call?

Your break-even price represents the stock price at which you have zero net gain or loss, but your maximum loss occurs if the stock falls all the way to zero. In that worst case, your loss per share equals your break-even price (since you lose the full break-even amount). The premium you collected reduces that maximum loss compared to simply holding the stock without selling a call.

Should I use the bid price or the midpoint when calculating my break-even?

Always use your actual fill price, not the quoted midpoint or ask. When you sell an option, you typically fill near the bid, which is lower than the midpoint shown on most quote screens. Using an inflated midpoint will make your break-even look better than it really is. Check your trade confirmation for the exact premium received and use that number in your calculation.