What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. 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 Message Thank you! Oops! Related Content When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Are You Prepared for an Estate Tax Sunset? The federal estate tax exemption sunsets in 2025. Learn more about what to do to make the most of the higher threshold. Principles of Preserving Wealth How federal estate taxes work, plus estate management documents and tactics.