The Power of Tax-Deferred Growth Why are 401(k) plans, annuities, and IRAs so popular? Share | Related Content 18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. An Inside Look at Retirement Living A number of questions and concerns need to be addressed to help you better prepare for retirement living.