Use complete source data
Work from original exports and contemporaneous records. Do not enter guessed values as if they were verified.
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FIFO crypto cost-basis calculator
See which oldest purchase lots a disposal consumes and estimate the resulting gain or loss.
Practical guidance
How the FIFO estimate works
Purchase lots are ordered by date. The calculator consumes the oldest quantity first, allocates its proportional cost, and continues until the disposal quantity is covered. It then compares that basis with net proceeds.
Review the result
Check dates, currency, quantities, fees, and assumptions before using an output in tax software or a filing.
Retain your evidence
Save original statements and notes that allow you or an adviser to reproduce the result.
Frequently asked question
Is FIFO valid everywhere?
No. Permitted cost-basis methods differ by country and sometimes by wallet or account. Verify the applicable method before filing.
Is information uploaded?
No. This tool runs locally in your browser. Analytics records page usage, not the financial values you enter.