Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Related Content Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax.