Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. 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? Address Thank you! Oops! Free Guide: Will Tax Reform Impact You? The new tax laws in 2018 could bring significant changes to your tax strategy. Download our free ebook, "5 Things You Need to Know About Tax Reform." First Name Last Name Email Address Thank you! Oops! Related Contents The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. What If You Get Audited? The chances of an IRS audit aren't that high. And being audited does not necessarily imply that the IRS suspects wrongdoing. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.