Computerized system and method for determining retirement withdrawals

A computer-implemented method for determining a withdrawal amount from each wealth source for each year of a fixed planning horizon, the method comprising the steps of:

• a. receiving fixed data and discretionary data from a user;
• b. executing a primary optimization model based on the fixed data and discretionary data, the primary optimization model having an output;
• c. if the primary optimization model output comprises a maximum accumulated wealth, generating an annual withdrawal plan that provides the withdrawal amount from each wealth source for each year of the fixed planning horizon,
• d. if the primary optimization model output is no feasible withdrawal plan, the steps of
• i. receiving final desired accumulated wealth data from a user, and executing a secondary optimization model based on the fixed data, the discretionary data, and the final desired accumulated wealth data;
• ii. if the secondary optimization model output comprises a before-tax expense value, modifying the discretionary data based on the before-tax expense value, and repeating the step of executing the primary optimization model;
• and
• iii. if the secondary optimization model output is no feasible solution, modifying the final desired accumulated wealth data and repeating the step of executing the secondary optimization model.

A computer-implemented method for executing a primary optimization model to determine a maximum accumulated wealth at the end of a fixed planning horizon comprising the steps of:

• a. providing for the receipt of fixed data and discretionary data from a user;
• b. providing for the receipt of a plurality of primary optimization instructions, wherein the plurality of primary optimization instructions are derived from at least one primary model objective function;
• c. providing for the translation of the fixed data and discretionary data into optimization model input data
• d. providing for the receipt of the optimization model input data by an optimization program;
• and
• e. providing for the execution of the optimization program based on the optimization model input data, an output of the optimization program comprising the maximum accumulated wealth.