Cash flow is a measure of how much cash a business brought in or spent in total over a period of time. Cash flow is typically broken down into cash flow from operating activities, investing activities, and financing activities on the statement of cash flows, a common financial statement.

While it’s also important to look at business profitability on the income statement, cash flow analysis offers critical information on the financial health of a company. It tells you if cash inflows are coming from sales, loans, or investors, and similar information about outflows. Most businesses can sustain a temporary period of negative cash flows, but can’t sustain negative cash flows long-term.

Newer businesses may experience negative cash flow from operations due to high spending on growth. That’s okay if investors and lenders are willing to keep supporting the business. But eventually, cash flow from operations must turn positive to keep the business open as a going concern.

Cash flow analysis helps you understand if a business’s healthy bank account balance is from sales, debt, or other financing. This type of analysis may uncover unexpected problems, or it may show a healthy operating cash flow. But you don’t know either way until you review your cash flow statements or perform a cash flow analysis.