There are many factors at play that ultimately affect a person's decision to retire. Physical or mental health can affect a person's decision to retire; if a worker is not physically strong enough, succumbs to a disability, or has mentally declined too much to perform the duties of their job, they should probably consider retiring, or at the very least try to find a new occupation that better accommodates their health. Also, stressors associated with an occupation can become too unbearable, leading to a decline in satisfaction with work. Age is also a factor that affects a person's decision to retire. Theoretically, retirement can happen during any normal working year. Some may choose to "semi-retire" by gradually decreasing their work hours as they approach retirement. Some announce retirement and enter it short-term, just to rejoin the workforce again. However, it generally occurs between the ages of 55 and 70., Retirement Calculator How much do you need to retire? This calculator can help with planning the financial aspects of your retirement, such as providing an idea where you stand in terms of retirement savings, how much to save to reach your target, and what your retrievals will look like in retirement., Use these free retirement calculators to determine how much to save for retirement, project savings, income, 401K, Roth IRA, and more..