A major concern of many people is whether their savings will last for their entire retirement. If the savings do last, it’s a success, but if the savings don’t last it could be considered a failure.

Key factors which influence whether savings will last for your entire retirement include the size of your portfolio at retirement (bigger is better), the amount of periodic withdrawals (the lower the withdrawals the greater the chance of not running out of money) and longevity (the longer you live, the more you need at the start of retirement).

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