Having the right amount of investment capital is extremely important when considering certain types of investments. To be able to beat the fixed costs of investments like the Stock Market or the startup costs of a business, an investor must be able to have the income above and beyond those costs to invest in a large enough pot to make the investment viable. A good way to tell if an investor has the right amount of investment capital is to break down the fixed costs into units of variable costs. If the fixed costs are less than 5% of the variable cost unit, then the appropriate amount of investment capital is present.