Cash Flow
Definition
Cash flow is the movement of money into and out of your business over a period of time. Positive cash flow means more money is coming in than going out; negative cash flow means the opposite. Cash flow is reported on the Cash Flow Statement, which is divided into three sections: operating activities, investing activities, and financing activities. A business can be profitable on paper but still have negative cash flow - making cash flow management a distinct and critical discipline.
In plain English
Cash flow is simply: are you receiving more money than you are spending? Your profit and loss tells you if your business model is profitable in theory. Cash flow tells you if you can actually pay your bills today. A business can have a beautiful P&L and still miss payroll if clients are slow to pay.
Profitable business with negative cash flow
A design agency invoices $50,000 in November (Net 60 payment terms). Payroll due Nov 30: $28,000 Rent due Nov 1: $5,500 Software subscriptions: $800 November P&L (accrual): Revenue: $50,000 Expenses: ($34,300) Profit: +$15,700 ✓ Profitable! November Cash Flow: Cash in: $32,000 (from September invoices finally paid) Cash out: ($34,300) (payroll, rent, subscriptions) Net: -$2,300 Warning - cash is tight.
Common misconceptions
“If the business is profitable, cash flow is fine”
Profit and cash flow are completely independent. The difference is timing. Revenue is recognized when earned; cash arrives when clients pay. Costs are recognized when incurred; cash goes out when you pay. A gap of even a few weeks at scale can create a severe cash crunch.
“Negative cash flow always means the business is failing”
Growing businesses often have negative cash flow - especially in early stages when they are investing in equipment, hiring staff, and building inventory ahead of revenue. The question is whether the negative cash flow is funded and whether it is sustainable. Many successful companies burned cash for years before becoming self-sustaining.
Key points
- Cash flow and profit are NOT the same - one is timing-based, the other is economics-based
- The Cash Flow Statement has three sections: Operating, Investing, and Financing
- Positive operating cash flow is the healthiest indicator of business sustainability
- A 13-week rolling cash flow forecast helps predict and prevent shortfalls
- 82% of small businesses that fail cite cash flow problems as the primary cause
How it relates to other accounting concepts
Unpaid AR is cash flow deferred. The faster you collect AR, the stronger your operating cash flow.
AP represents cash you owe but have not yet paid. Strategically timing AP payments (paying on due date, not before) preserves cash.
Working capital (Current Assets minus Current Liabilities) is closely related to cash flow. Shrinking working capital often precedes cash flow problems.
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