Avoid running out of money when you need it most
Will your money last as long as you do? How about your spouse? Many retirees plan for too short a time horizon and misjudge how much money they can safely withdraw during retirement.
Carefully consider your time horizon. You may live a lot longer than you think
Life expectancies have been steadily increasing. According to the National Institutes of Health (NIH), average life expectancy has risen about nine years since 1952. Today, the average life expectancy for a 65-year-old is 83.4 years, as shown in the following table.1 And that’s just the average—half could live even longer.

Source: Internal Revenue Service
Given rapid advances in modern medicine and health care, you simply must plan for a longer investment time horizon than your parents or grandparents did. And don’t forget about your spouse’s time horizon! Longer life expectancies present a challenge to today’s investors not faced by previous generations.
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How much can you withdraw from your portfolio each year?
Investors often have unrealistic expectations about how much money they will be able to safely withdraw annually from their portfolios.
A common but incorrect assumption is that since equities have historically returned nearly an annualized 10% over long time periods,2 then it is safe to withdraw 10% per year without ever drawing down the principal.
Nothing could be further from the truth!
While equities have historically returned 9.7% annualized,2 because of inflation (approximately 3.0% annualized)3 the real return on investment is 6.49% annualized.
The following table demonstrates the potential impact of taking annual withdrawals equal to 10% of the beginning portfolio value from a $1,000,000 portfolio over 30 years (adjusting for inflation). In this example, the probability the assets survive the entire period is low, as is the probability of growing the assets—no matter the asset allocation.

This table is based on a Monte Carlo simulation, a sophisticated statistical technique which allows for random sampling of historical stock, bond, and cash returns while taking into account historical inflation to determine the probability of investment outcomes.
Market volatility can play a role
Another important factor: Markets are volatile, and taking a 10% withdrawal in a year when the market declines could substantially decrease the probability of meeting your financial objectives. For example, if your portfolio is down 20% and you take a 10% distribution the same year, you will need about a 39% gain the following year just to get back to even!
Don’t forget about inflation
Inflation will also affect the size of the withdrawals over time. Due to the compounding effects of inflation, a person who needs $50,000 in 2009 to cover annual living expenses would need approximately $92,000 in 2029 and $125,000 in 2039 to maintain the same purchasing power.3
To learn more about retirement investing issues, click here.
1 The US Total Population Life Table 2003 (revised as of March 28, 2007) National Vital Statistics Reports, Volume 54, Number 14
2 S&P 500 Total Return; Global Financial Data, Inc. 1926-2009 = 9.70%
3 Global Financial Data, Inc.; based on US Bureau of Labor Statistics Consumer Price Index 1926-2009 = 3.0% inflation rate