A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Related Content Why Regular Rebalancing Makes Sense Without your knowing, your investment portfolio could be off-kilter. Net Unrealized Appreciation (NUA) Explained Have you considered the special tax treatment on company stock held in a 401(k) plan? Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction.