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. Related Content When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Three Key Questions to Answer Before Taking Social Security When to start? Should I continue to work? How can I maximize my benefit? What Is My Current Net Worth? Use this calculator to estimate your net worth by adding up your assets and subtracting your liabilities.