Retirement as a concept is not very old. It can largely be traced back to the creation of Social Security in 1935. At this time Social Security was used to guarantee a fixed basic income for older workers so that they would leave their jobs and create vacancies for younger workers.

Now that retirement is taken for granted, most people wonder if they are saving enough to take care of their needs when they stop working. Though there is a lot of dispute regarding the issue, many financial experts believe that you need approximately 70% of your pre-retirement income to allow you to continue living your same lifestyle after retirement.

The ability to live the same general lifestyle on 30% less money hinges on decreased expenses that come with retirement and an increase in age. According to a study by the U.S. Census Bureau from 2002, people between the ages of 45 and 54 spend approximately $15,000 on housing while people 75 and older spend only about $8,000. Also people between 45 and 54 spend more than $9,000 every year on transportation while those above 75 and older spend only about $3,000. This reflects a drop not only in the cost of buying a vehicle but also maintaining one - the money spent on gas and repairs – which often comes with not having to commute to work among other things.

Though retirement does not bring only savings, people between 45 and 54 spend $2,550 on healthcare a year while those above 75 spend $3,584 on average.

Significantly, this same study points out that income before taxes for a household kept by a 45 to 54 year old person is $64,974 while for people 75 and above it is only $23,890. The ability for many retirees to survive on a significantly reduced income points to other fundamental, or sometimes forced, changes in expenses.

As a person gets older there is a decrease in the number of dependents in the household which leads to a reduction in food costs and other household expenses. Also, with the kids moved out, maintaining a large house is not only an extra expense but also impractical. Many retirees downsize their homes and can use some of the excess proceeds to add to their savings.

The money that you spend on entertainment in retirement is difficult to predict or find reliable statistics on (though the Census Bureau does report on it – its methodology is too vague). Some people end up spending more because they have more time and the freedom to do what they please with it. The only difference might be that your definition of entertainment might undergo a transition. You might now be going to yoga classes instead of a concert – or you might go to more concerts and less yoga (now that the stress of work is gone)! But these are largely personal choices and difficult to speak generally on, but if you plan on traveling the world when you retire, save accordingly.

The only real answer to the question of how much you need to retire is “how ever much you plan on spending.” The answer depends on how you intend to spend your time as a retiree. Examining these important categories, you can see that generally retirement comes with some inherent savings related to not having to go to work any more as well as usually no longer have children in the house; however, there are those that retire and actually spend more money than before. How you plan on living during retirement is a uniquely personal choice – perhaps you are planning on taking advantage of the time to take the trips you’ve always wanted or maybe you are content to read the great novels you never had time for before. Both choices sound great but each comes with very different financial costs.

Whatever your vision of the perfect retirement is, start planning for it sooner rather than later - because you do not want to reach your golden years only to find that you do not have enough gold to live the years comfortably.