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. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Contents Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction. You May Need to Make Estimated Tax Payments If… Have income that isn’t subject to tax withholding? Or insufficient withholdings? You may have to pay estimated taxes. “Dirty Dozen” Tax Scams to Watch For Every year the IRS releases its list of tax scams, spotlighting some ways that people try to separate you from your money.