Abstract: A method and system for determining an investment portfolio withdrawal rate is disclosed, including determining a target draw rate and adjusting the target draw rate by a value gap to determine a safe maximum withdrawal rate. The value gap may be determined by comparing the investment portfolio to an estimated internal value of the portfolio or to a market trend value. Alternative embodiments may include subsequently adjusting the safe maximum withdrawal rate by a value gap when the value gap allows and if desired. Further embodiments may provide methods and systems for managing distributions associated with an investment account, which may incorporate the determination of a safe maximum withdrawal rate.