Retirement planning is unquestionably the most difficult type of goal-oriented financial planning. Most goal-based planning is straight-forward, solving for the amount, and frequency, of payments that need to be made to accumulate a sum of money at a future date using two assumptions: rate of return and inflation rate.
College education planning is a good example of the use of this methodology with a twist. Unlike other planning where the future value will be withdrawn in one lump sum, college costs are generally paid for over a series of four or five years. This complicates the planning since it requires the calculation of the present value of the future annual costs of college at the beginning of college, which in turn becomes the future value that must be accumulated.