Is Holding 3 Months Worth of Business Overheads Enough to Protect Me From Risk?

Business coaches and consultants often advise a small business, to always aim to hold 3 months’ worth of their overhead costs. This is to mitigate the risk of some down turn in the business.
In fact, this could apply to any unforeseen event occurring, this would mean you were unable to generate sufficient sales to cover your fixed costs.