Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content It Was the Best of Times, It Was the Worst of Times All about how missing the best market days (or the worst!) might affect your portfolio. Data Breach: Your Security To-Do List This article provides a checklist of steps to take if you experience a data breach. What You Need to Know about Tax-Loss Harvesting While tax-loss harvesting won't eliminate your taxes, it may offset what you owe on your taxable investment accounts.