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Covered Call Roll Calculator

What a roll really nets after the buyback — and whether the new strike still clears your basis.

The call you have open

The call you'd sell instead

Why the new premium is the wrong number to look at

A roll is two trades: you buy back the call you have open, and you sell another one further out. Only the second half looks like income, and the first half is almost always bigger than the premium that leg originally earned — because you are usually rolling precisely when the option has moved against you. The net is the trade. Everything else is presentation.

  • Net credit = new premium − buyback − fees. Negative means you are paying to roll, which is sometimes right and never income.
  • Realised on the closed leg = original premium − buyback. This is usually a loss and that is normal; the question is whether the new credit more than covers it.
  • Days added = new expiration − days already left. You were already committed for the remainder; the roll only buys the difference.
  • Annualised = net credit ÷ capital × (365 ÷ days added).
  • P&L if called away = (new strike − cost basis) × shares + all premium collected on the cycle.

Rolling up and out

Shares cost $50. A $52 call sold for $120 is now $180 to buy back, with 5 days left.

Roll to the $55, 35 days out, for $260. Fees $2.

Net credit: $260 − $180 − $2 = $78.

The closed leg lost $60 — and the roll is still worth doing.

Days added: 35 − 5 = 30. That $78 on $5,000 of stock annualises at 19.0%.

Called away at $55: $500 of stock gain plus $378 of premium = $878.

The strike below your basis

Rolling down for a bigger credit is the trap this calculator exists to catch. If the new strike sits below what the shares have cost you net of premium, being called away there books a loss — and the fatter the credit, the more reasonable it looks while you are doing it. The calculator says so in plain words when it happens.

When rolling is the wrong move

  • You would be happy to sell at the strike. Then let it be called away. That is the wheel working, not a problem to be fixed.
  • The roll adds a lot of time for very little. 45 days out for $40 is a bad trade wearing a credit's clothing; the annualised figure is there to make that obvious.
  • You are rolling to avoid booking a loss. Rolling does not undo a loss, it postpones the decision and ties the capital up longer.
  • Earnings land before the new expiration. You have rolled into an event, not away from one.

For the decision itself rather than the arithmetic, see rolling. If you are early in the cycle and the call is comfortably out of the money, the covered call calculator is the page you want instead.

Rolling

Buying back and re-selling to buy time — and the honest test for whether it's helping.

Educational only

These figures come from the numbers you enter and standard options arithmetic. Nothing here is investment, financial, or tax advice, and a good-looking return says nothing about whether the underlying stock is a good idea.

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