Final answer:
When a business is operated as an S corporation, the shareholder must pay taxes on their share of the income, regardless of whether the income is distributed or not.
Step-by-step explanation:
When a business is operated as an S corporation, the disadvantage is that the shareholder must pay taxes on their share of the S corporation's income, even if the income is not distributed to them. This is known as pass-through taxation. The S corporation itself is not taxed at the corporate level, but rather the shareholders report the income on their personal tax returns.