Offer your thoughts or opinion on the input financial query or topic using your financial background.

How do you determine “excess cash” for Enterprise Value calculations from a balance sheet?
​​​​​You're not missing anything. Excess cash is somewhat of a nebulous concept. To different people it means different things. The answer is that excess cash varies for each company depending on their business. For instance, some companies need very high amounts of working capital. A company may be increasing their inventories and therefore will require more cash on their balance sheet to fund growth. If a company always needs this extra cash, some investors prefer to leave that cash out of a valuation because the company cannot run profitably without it. Think about what happens to your calculation of Enterprise Value if you subtract excess cash as opposed to cash. Excess cash is always less than cash. Therefore by subtracting excess cash you increase EV. Since one common valuation metric is EV/EBITDA, a higher numerator will make the stock seem more expensive - that is the EV/EBITDA ratio will seem higher when using excess cash as opposed to cash. So using excess cash in your valuation methodology is basically a conservative concept. Depending on the business 20% of revenues seem way too high as a reserve for excess cash. 2% is a much better rule of thumb.