There are a number of calculators available to answer your retirement and other financial planning questions. Running a simple calculator once a year can help you keep better on track in reaching your retirement goals.
The AARP Retirement Calculator can help you see if you have enough money (in addition to Social Security and any pension) to last through your retirement. If the results say you will run out of money, you can enter a later retirement age or reduce your retirement lifestyle to see how those changes could affect your financial security. This tool will even allow you to view and change its default assumptions, including the rate of return on your savings, your tax rate, and your life expectancy.