BAF3M-U2-L02 · BAF3M
Transaction analysis and the expanded equation
Learning goals
- Distinguish revenue, expenses, and drawings from capital financing.
- Apply the expanded equation to cash and credit transactions.
- Explain why collections, payments of payables, and drawings do not affect profit.
- Trace each change toward the financial statements.
Prerequisite check
State the basic equation. What changes when a business pays a supplier balance: expense, liability, or both? A past payable decreases; the original asset or expense is not recorded again.
Vocabulary
- Revenue: an increase in equity from earning activities, excluding owner contributions.
- Expense: a cost of earning revenue in the period that decreases equity.
- Drawings: assets withdrawn by a sole proprietor for personal use; drawings reduce equity but are not an expense.
- Expanded equation:
Assets = Liabilities + Capital + Revenue − Expenses − Drawings. - Credit transaction: a transaction in which payment or collection happens later.
- Net income: revenue minus expenses when revenue is greater.
Core idea
Capital explains direct owner financing. Revenue and expenses explain operating performance. Drawings explain owner withdrawals. Keeping them separate lets the income statement measure performance without treating investment or personal withdrawals as business operations.
Why this treatment makes sense
Receiving $1,000 from a customer for work increases revenue. Receiving $1,000 from the owner does not mean the business earned anything. Paying rent is an expense; paying an old payable simply settles a liability. Cash alone cannot identify the economic event.
A repeatable method
Ask five questions:
- What happened—earned, incurred, invested, withdrew, borrowed, collected, or settled?
- Which asset or liability changed?
- Is the equity effect Capital, Revenue, Expense, Drawings, or none?
- Does the transaction affect profit now?
- Does the expanded equation remain equal?
Worked example
Elm Street Media begins the week with Assets $9,800, Liabilities $2,100, and Capital $7,700. It then:
| Event | Asset change | Liability change | Expanded-equity change |
|---|---|---|---|
| Earns $3,400 cash | +$3,400 | — | Revenue +$3,400 |
| Earns $1,100 on account | A/R +$1,100 | — | Revenue +$1,100 |
| Pays $900 rent | Cash −$900 | — | Expense +$900, which reduces equity |
| Collects $600 from customer | Cash +$600; A/R −$600 | — | — |
| Pays $500 of accounts payable | Cash −$500 | −$500 | — |
| Owner withdraws $350 cash | Cash −$350 | — | Drawings +$350, which reduces equity |
Net change in assets = $3,400 + $1,100 − $900 − $500 − $350 = +$2,750. The collection moves value between two assets and has no total effect.
Ending assets = $9,800 + $2,750 = $12,550. Ending liabilities = $2,100 − $500 = $1,600.
Ending equity = $7,700 + Revenue $4,500 − Expense $900 − Drawings $350 = $10,950.
Check: $12,550 = $1,600 + $10,950.
Profit = $4,500 − $900 = $3,600. Drawings do not enter that calculation.
Journal, ledger, and statement connection
Revenue and expense accounts collect period performance in the ledger. Drawings collects owner withdrawals separately. At period-end, revenue and expenses feed the income statement; net income and drawings feed the statement of owner's equity; ending capital reaches the balance sheet.
Common mistakes
- Recording a receivable collection as revenue a second time.
- Recording payment of a payable as an expense a second time.
- Treating Drawings as an expense.
- Treating an owner contribution or loan as revenue.
- Looking only at Cash and missing Accounts Receivable or Accounts Payable.
Guided practice
Beginning equation: Assets $15,000 = Liabilities $4,000 + Capital $11,000.
- Earn $2,500 cash.
- Incur $700 utilities to be paid next month.
- Collect $900 from an existing receivable.
- Owner withdraws $400 cash.
Find ending assets, liabilities, equity, and net income.
Independent practice
Bright Path Coaching has beginning assets $22,000, liabilities $6,500, and capital $15,500. During June it earns $5,800 cash and $2,200 on account, pays $3,100 of current expenses, collects $1,400 of receivables, pays $900 of old payables, and the owner withdraws $700.
Prepare an expanded-equation change table and calculate ending totals and June net income.
Self-check and solutions
Guided practice:
- Cash revenue: Assets +$2,500; Revenue +$2,500.
- Utilities on account: Liabilities +$700; Expense +$700, reducing equity.
- Collection: Cash +$900 and A/R −$900; no total change.
- Drawings: Assets −$400; Drawings +$400, reducing equity.
Ending assets = $15,000 + $2,500 − $400 = $17,100. Ending liabilities = $4,700. Equity = $11,000 + $2,500 − $700 − $400 = $12,400. Net income = $1,800. Check: $17,100 = $4,700 + $12,400.
Independent practice:
Net asset change = $5,800 + $2,200 − $3,100 − $900 − $700 = +$3,300. The $1,400 collection changes the asset mix only. Ending assets = $25,300. Ending liabilities = $6,500 − $900 = $5,600. Net income = $8,000 − $3,100 = $4,900. Ending equity = $15,500 + $4,900 − $700 = $19,700. Check: $25,300 = $5,600 + $19,700.
Retrieval practice
Write the expanded equation from memory. Explain the profit effect of owner investment, cash revenue, credit revenue, receivable collection, expense on account, payable payment, and drawings.
Exam-style application
A business's assets increased $6,000 and liabilities increased $2,500 during a month. The owner invested $1,000 and withdrew $600. Expenses were $4,200. Find revenue.
Answer outline: Equity increased by Assets change − Liabilities change = $6,000 − $2,500 = $3,500. Use equity change = Investment + Revenue − Expenses − Drawings. $3,500 = $1,000 + Revenue − $4,200 − $600, so Revenue = $7,300. Check: $1,000 + $7,300 − $4,200 − $600 = $3,500.
Lesson summary
Revenue and expenses measure performance; capital and drawings record owner transactions. Collections and liability payments settle earlier events. Identify the event before following the cash.