I wrote a short article for Wealth Strategies Journal called, "When Can I Retire? Answers from the Historical Record."
The last paragraph of the introduction effectively summarizes the issues explored in this article:
The purpose of this article is to explore some loose ends from the "Getting on Track" article. That article provides a framework for mid-career individuals to develop a progress report about their retirement plans by showing which savings rate they may still need to use and how much longer they may still need to work. How would the results change for a younger, mid-career individual who wishes to plan for retirement sustainability without relying on Social Security income? What impacts do annual percentage of portfolio fees have on sustainable savings rates and retirement ages? And how different are the results for a retiree making plans to enjoy a sustainable retirement through age 90, rather than through age 100?
If you are interested in those issues, particularly the impact of a 1% fee and the impact of planning up to age 90 instead of age 100, then please have a look. Also, this article is written from the perspective of a 40 year old.
Regarding the specific issues addressed in the article, I'd really like to thank Ricky Hutchins, CFP, and Jean Lesperance for their suggestions.