Retirement planning methods and systems for use with an individual investor having a retirement plan comprising assets and future liabilities. One or more computing devices perform the methods. Embodiments of the methods include determining a net present value of the assets and a net present value of the future liabilities. A funded ratio is calculated as a function of the net present value of the assets and the net present value of the future liabilities. If the funded ratio is less than a predetermined threshold value, the retirement plan is at risk of being underfunded. If the funded ratio is greater than the predetermined threshold value, the retirement plan is not at risk of being underfunded. An indication may be displayed indicating whether the retirement plan is at risk of being underfunded.