cost basis

Original purchase price

Cost basis is the original value of an asset for tax purposes, typically what you paid for it plus associated costs like commissions or fees.

When you sell, your taxable gain or loss is calculated from this baseline: The stock's cost basis was $50 per share, so selling at $75 meant a $25 gain.

Adjustments occur for stock splits, reinvested dividends, or inherited property.

Opposites
valuation timing

cost basisfair market value

Objective exchange price

present value · market price · current value · appraised value · book value

investment outcome

cost basissale proceeds

Money received from selling

capital gain · return on investment · profit · loss · net proceeds

gain/loss calculation endpoints

cost basissale price

Discounted retail amount

proceeds · selling price

Family

cost, basis

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