Effective September 2026. CostAveragingCalculator provides a free tool for computing average cost basis, total cost basis, and break-even/target price from user-entered position and buy data.
This tool is for general educational and informational purposes only. It does not constitute financial, investment, legal, or tax advice, and it is not affiliated with, endorsed by, or authoritative for any brokerage, exchange, or financial institution. It performs weighted-average arithmetic on the numbers you enter and nothing more — it does not account for trading fees, wash-sale rules, lot-selection tax methods (FIFO/LIFO/specific-lot), or broker-reported cost basis. Always verify your real cost basis with your own brokerage or exchange statements, and consult a qualified financial or tax professional for personal decisions.
Results are provided "as is," without warranty of any kind, and are only as accurate as the numbers you enter. We are not liable for investment decisions or tax filings made based on these calculations.
Don't scrape, resell, or misrepresent the service, or present its output as official brokerage or tax-reported cost basis.
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