Covered Call Buyback: When to Close at 50% Profit (2026)

The last slice of premium is the worst slice

When you sell a covered call, the premium does not decay evenly. Much of the easy, reliable decay happens in the first part of the trade; the final stretch hands you a shrinking reward while the risks quietly grow. By the time a call you sold for US$2.00 is trading at US$0.50, you have captured 75% of the maximum profit, and only US$0.50 of premium remains to be earned — but the position still carries days of exposure, the chance of a sharp adverse move, and rising gamma as expiration nears. The risk-to-reward of holding has flipped from favorable to poor.

This asymmetry is the entire case for buying covered calls back early. You are not trying to perfectly time the bottom of the option's value; you are recognizing that the last portion of premium is the least worth fighting for. Closing the trade locks in the gain you have already earned and returns your shares and capital to use on a fresh setup where the risk/reward is again favorable.

The 50-80% max-profit rule

A widely used guideline is to buy back a short covered call once you have captured 50% to 80% of its maximum profit. The captured fraction is simple to compute: premium collected minus current buy-back cost, divided by premium collected. Sold for US$2.00 and now worth US$0.50? You have captured US$1.50 of US$2.00, or 75%. At that level many writers close, bank the gain, and move on.

The precise threshold is less important than having one and following it. A mechanical rule defends you from two opposite mistakes: the greed of squeezing the final cents out of a winner and watching it reverse, and the regret of giving back a gain you could have locked. Some writers favor 50% for faster turnover and more cycles; others wait for 75-80% to capture more of each trade. Either works if applied consistently.

Close, hold, or roll — the decision

These are not competing dogmas but tools for different situations. Buying back is the cleanest exit when you simply want to remove the risk and free the shares. Rolling keeps the income engine running on the same stock — it is just a buy-back paired with a new sale, ideally for a net credit. Assignment is the right answer when the strike was always an acceptable exit. The only consistently poor choice is holding stubbornly to expiration to capture a trivial remaining premium against meaningful risk.

Gamma and event risk near expiration

Two forces make the final days of a short call uncomfortable. The first is gamma: as expiration approaches, an at- or near-the-money option's delta becomes increasingly sensitive to the stock, so the position can swing from comfortably out of the money to in the money on a single move. The second is event risk — an earnings date, a product announcement, or a broad market lurch — that can blow through your strike when there is no longer enough premium left to compensate. Both grow precisely as the remaining reward shrinks.

Closing earlier sidesteps both. By buying back at 50-80% of max profit, you exit before gamma turns the position jumpy and before late-cycle events can spring a surprise. You are trading a few cents of additional premium for a meaningfully calmer, more predictable outcome — usually a good trade for an income writer who values consistency over squeezing every last dollar.

The tax footnote of closing

Buying a covered call back to close is a taxable event: it realizes the option's gain or loss in the current tax year, generally as a short-term capital gain regardless of how long you have held the underlying stock. That is usually fine — the gain was the point — but it is worth remembering when timing closes around a year-end. More subtly, if you buy a call back at a loss and then re-establish a substantially identical short call within the wash-sale window, IRC §1091 can disallow and defer that loss into the new position's basis.

Inside an IRA or Roth IRA, none of this applies — there is no annual tax on the realized option gain and no wash-sale tracking, which is one more reason active writers favor retirement accounts for frequent buy-backs and rolls. Use the covered-call and profit calculators below to compute exactly what percentage of max profit you have captured, and let that number, not emotion, drive the decision to close, hold, or roll. Consult a tax professional for your specific reporting.

Buying back a losing covered call

The buyback decision is not only for winners. Sometimes the stock rallies through your strike and the call you sold is now worth far more than you collected — a paper loss on the option, offset by gains on your shares. Here, buying the call back to close locks in that option loss and frees you from the cap, letting your shares participate fully if you have turned bullish. Whether that is wise depends entirely on your view of the stock: if you still want full upside and would not sell at the strike, closing (or rolling up) can be right; if the strike was always an acceptable sale price, simply letting assignment happen is cleaner and cheaper.

The key is to separate the option's mark-to-market loss from the position as a whole. A covered call that gets run over is usually a profitable outcome overall — your shares gained more than the call cost you, you just capped the gain. Buying the call back at a loss to 'fix' that is often unnecessary churn driven by the discomfort of seeing a red number on the option leg. Decide based on what you want the underlying shares to do next, not on the call's standalone loss.

Key takeaways

Knowing when to close a covered call is as important as knowing how to open one. Capture most of the premium, exit before the flat and risky tail, and choose deliberately among buying back, rolling, and assignment based on what you want next. Let the captured-profit percentage and your view of the stock drive the call — not greed for the last few cents or discomfort with a red option leg — and use the calculators below to put a precise number on the decision.

• Buy back a covered call after capturing ~50-80% of its maximum profit
• Captured % = (premium collected − buy-back cost) ÷ premium collected
• The last slice of premium is the least rewarding and the riskiest (gamma, events)
• Buy back to exit, roll to keep writing on the same shares, or accept assignment if the strike was fine
• Closing realizes a short-term option gain/loss this tax year; loss buy-backs can trip wash-sale rules
• On a winning rally, judge a losing call leg by your view of the stock, not the red number