11 Costly Stock Trading Mistakes New Investors Make

10. Ignoring Taxes

That quick win you made on a stock? Uncle Sam noticed. New investors often forget that short-term capital gains (from stocks held under a year) are taxed at higher rates. Frequent trading can lead to surprise tax bills come April. Plus, not tracking your trades properly can make tax filing a nightmare. Get familiar with the basics: short vs. long-term gains, dividend income, and tax-advantaged accounts. Use trading platforms that generate tax reports—and keep your own records too. Smart investing includes planning for taxes—not just profits.