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Topic
Cost basis
5 guides in Finabase Learn
- Capital gains tax on stocks: 2026 rates, holding periods and basis How US federal tax treats stock and fund gains in 2026: short- versus long-term, the 0%, 15% and 20% thresholds, the 3.8% NIIT, cost basis methods and loss limits.
- Lot A quantity of shares bought at one time and price; a round lot is 100 shares, and tax lots track each purchase's cost basis.
- Tax-loss harvesting: how it works, the wash-sale rule and its limits How tax-loss harvesting offsets gains and up to $3,000 of income under 2026 US federal rules, with worked examples, the wash-sale limit and the trade-offs.
- Track a portfolio in Stock Master: transactions, gains and reports Create a portfolio in Stock Master, record buys, sells, shorts, cash and dividends, read day gain, total gain and realized profit, and export reports.
- Wash sale rule: the 61-day window, basis adjustment and traps How IRC §1091 disallows a loss when you rebuy within 30 days, how the loss moves into your new basis, and the IRA, options and 1099-B traps for tax year 2026.
Educational content, not investment advice. Finabase Learn explains how markets and tools work. It does not recommend any security or strategy, and examples are for illustration only. Investing involves risk, including the loss of principal. Rules and figures are for the United States unless stated and can change — check the cited source before you act.