Cash flow is the movement of money into and out of a business over time. For a student-run business like a lemonade stand, snack kiosk, or online T-shirt shop, cash comes in from sales and goes out for supplies, fees, delivery, or equipment. Understanding cash flow matters because a business can make sales and still run out of money if expenses happen before customers pay.
Good cash flow habits help entrepreneurs plan, avoid surprises, and make smarter decisions.
Key Facts
- Net cash flow = cash inflows - cash outflows.
- Positive cash flow means more money came in than went out during a period.
- Negative cash flow means more money went out than came in during a period.
- Ending cash balance = beginning cash balance + net cash flow.
- Profit = revenue - expenses, but profit is not always the same as cash flow.
- Break-even quantity = fixed costs / (price per unit - variable cost per unit).
Vocabulary
- Cash inflow
- Cash inflow is money entering a business, such as payments from customers, loans, or owner investments.
- Cash outflow
- Cash outflow is money leaving a business to pay for items such as supplies, rent, wages, advertising, or shipping.
- Net cash flow
- Net cash flow is the difference between total cash inflows and total cash outflows during a specific time period.
- Inventory
- Inventory is the stock of products or materials a business has available to sell or use.
- Break-even point
- The break-even point is the level of sales where total revenue equals total costs, so the business has no profit or loss.
Common Mistakes to Avoid
- Confusing sales with cash collected is a mistake because a customer order does not always mean the money has arrived yet.
- Ignoring small expenses is a mistake because items like cups, bags, transaction fees, and delivery costs can add up and reduce available cash.
- Spending all cash after a good sales day is a mistake because the business may still need money for inventory, future bills, or slow sales periods.
- Using profit as the only measure of success is a mistake because a profitable business can still have cash flow problems if money comes in too late.
Practice Questions
- 1 A school snack kiosk starts Monday with 220 from sales and spends $150 on snacks and supplies. What is the net cash flow, and what is the ending cash balance?
- 2 An online T-shirt shop sells shirts for 10 to print and ship, and the shop pays $120 for website and design costs. How many shirts must it sell to break even?
- 3 A lemonade stand has strong sales on Friday, but the owner must buy lemons, cups, and ice on Thursday before customers pay. Explain why cash flow planning matters even if the stand expects to make a profit.