The 4% Rule Explained
The 4% rule, developed by financial planner William Bengen in 1994, states that retirees can withdraw 4% of their portfolio in the first year of retirement, then adjust for inflation each year after. This strategy historically survived 30 years of retirement in 95% of all historical market periods tested, including the Great Depression and 2008 financial crisis. To use the 4% rule: divide your annual expenses by 0.04 to get your target retirement savings. If you need $40,000/year from savings (after Social Security), you need $40,000 ÷ 0.04 = $1,000,000. Some modern advisors suggest a 3.5% rule for more conservative planning, especially given longer life expectancies.
How Compound Interest Supercharges Retirement Savings
Starting early is the single most powerful retirement strategy. A 25-year-old investing $300/month at 7% return will have $948,000 at age 65 — from just $144,000 in total contributions. A 35-year-old investing the same $300/month will have only $453,000 at 65. Starting 10 years later means you accumulate less than half, despite contributing $108,000. Each decade of delay roughly requires doubling your monthly contribution to reach the same goal. The math is clear: time in the market beats timing the market, and starting today beats starting "when you have more money."
Retirement Savings by Age: Are You On Track?
Financial experts suggest these milestones: by age 30, save 1× your salary. By 40, save 3× your salary. By 50, save 6× your salary. By 60, save 8× your salary. By 67, save 10× your salary. If you earn $55,000, you should have $55,000 saved by 30, $165,000 by 40, $330,000 by 50, $440,000 by 60, and $550,000 by 67. If you are behind, increase your savings rate, delay retirement by 2-3 years (which has a massive compound effect), or both.
Disclaimer: This calculator provides estimates for educational purposes only. Actual retirement needs depend on healthcare costs, market performance, tax situations, and individual circumstances. Consult a certified financial planner for personalized retirement planning.