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Closing a cash-secured put early: when, how, and what it costs

You close a cash-secured put early with a "buy to close" order. Many sellers do it once the put has lost about half its value, which frees the cash and skips the last two weeks, where the risk per dollar of premium is worst. Here is the math and the order.

Options guide · 6-minute read · Updated 2026-10-26

Why close early at all

You sold a put for $1.00. Two weeks later it's worth $0.50. You've made half the premium. The question is whether the other $0.50 is worth two more weeks of risk.

Often it isn't. The last stretch before expiry is when a small move in the stock swings the option the most. You'd be holding the full assignment risk to collect the smaller half of the premium. Closing takes the $50 and frees the $4,500 for the next trade.

That's the whole idea behind the 50% rule: close when you've captured about half the premium.

The order

It's one ticket, the mirror of the one you opened with:

When it fills, the put is gone, the cash is released, and your result is the premium you collected minus what you paid to close. "Buy to open" is a different thing: it would start a new long put. Pick the wrong one and most brokers warn you, but check.

A worked example (an illustration, not a trade idea)

XYZ at $50. You sell a 45-day $45 put for $1.00, collecting $100, with $4,500 set aside.

Hold the whole way and you get $100, if XYZ cooperates. Close on day 14 and you bank $50 in a third of the time, with the cash free for 31 extra days.

Now the other path. Same put, but XYZ turns down:

The seller who closed on day 14 made $50. The seller who held for the last $50 ended up assigned on a stock at $42 and down $200, before it fell any further. Same trade, same stock. The difference was taking the half when it was there.

What closing early gives up

Closing at half is not free. It costs you the other half in every month where the stock stays above the strike. Here is the day-14 close against holding, for four endings:

In the two calm rows, holding paid $50 more. In the two bad rows, closing saved $250 and $650. You are choosing a smaller, surer half over a bigger, shakier whole.

The freed $4,500 matters too. It can back the next put sooner. That's only worth something if the next put is a good trade, not just any trade sold because the cash was free.

When closing early is the wrong call

• The put is worth more than you sold it for. Closing locks in a loss. That can still be right, but it's a different decision: it's an exit rule, not a profit take. See cash-secured put exit rules.
• You actually want the shares. If you sold the put to buy XYZ at $45, and it's heading there, closing defeats the purpose.
• The gap between bid and ask is wide. On a thin option, buying to close can cost a good chunk of what you made. Check the spread before you decide.
• Fees eat it. On a $0.25 put, closing at $0.12 might net a few dollars after commissions. Sometimes letting a nearly worthless put expire is fine.

A simple set of triggers

Write these down before you sell:

1. Profit take: buy to close when the put is worth about half what you sold it for.
2. Time stop: if it isn't there by about 21 days to expiry, close or roll anyway. The fast-decay weeks aren't worth the fast-risk weeks.
3. Loss stop: if the put is worth double what you sold it for, decide: close, or take the shares on purpose.

The 50% and 21-day numbers are common defaults in the wheel strategy, not laws. Pick yours and keep them.

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