Free calculator
Options-adjusted cost basis
Track the economic cost of shares after option credits, debits and fees.
- Economic net cost
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- Economic breakeven / share
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Enter explicit zero where appropriate. Avoid counting fees twice if your net premium already includes them. This economic tracking view is not your tax basis.
Economic breakeven
Net economic cost = shares × purchase price − net option credits + additional fees. Divide by the remaining share count for the economic breakeven. Use only premiums attributable to these shares; this simple worksheet does not allocate partial assignments or sales.
FAQ
Is this my official tax basis?
No. Tax treatment depends on transactions, holding periods and local rules. Use broker records and qualified tax guidance for reporting.