Business finance and accounting — the Unit 3B side of the course — is where many students get nervous, but it comes down to a handful of clear ideas: reading the statements, telling profit from cash, and knowing what it costs to run and fund a business. These guides explain each one in plain English, with worked numbers.
Why This Matters on the Exam
Unit 3 is the single most heavily weighted unit on the multiple-choice section, and business finance is central to the Business Canvas Project's financial deliverables and to the free-response questions. Getting comfortable with these concepts pays off across the whole exam.
The Guides
How to Read an Income Statement →
Revenue, COGS, gross profit, and net income — with a worked example.
Profit vs. Cash Flow →
Why a profitable business can still run out of cash.
Break-Even Analysis →
Contribution margin and the break-even formula, step by step.
Fixed vs. Variable Costs →
Sorting costs into the two buckets that drive every calculation.
How to Read a Balance Sheet →
The accounting equation, assets, liabilities, and equity.
Debt vs. Equity Financing →
How businesses raise money — and the trade-offs of each.
Where This Fits
These concepts live in Unit 3B (Business Finance and Accounting). For the personal side of money, see the personal finance guides, the marketing guides, the business foundations guides, or the management & strategy guides. When you're ready, test yourself with the practice questions or follow the full study plan.
Frequently Asked Questions
What's the difference between an income statement and a balance sheet?
An income statement covers a period of time and shows profit; a balance sheet is a snapshot at one point in time and shows what a business owns and owes.
Why can a profitable business run out of cash?
Because profit and cash aren't the same — timing differences from credit sales, inventory, and loan payments can leave a profitable business short on cash.
How do you calculate break-even?
Break-even units = fixed costs ÷ contribution margin, where contribution margin = price per unit − variable cost per unit.
These guides are educational explanations written for the AP Business with Personal Finance course.