Bookkeeping · Foundations · Brief · Intro level
Accounting equation practice: six worked mini-scenarios
Six small transactions, each traced through Assets = Liabilities + Equity and posted as a journal entry. A drill piece: work each one before reading the answer.
The fastest way to make debits and credits automatic is to drill transactions through the equation: Assets = Liabilities + Equity, with revenue growing equity and expenses shrinking it. Below are six mini-scenarios. For each: decide the two (or three) effects, check the equation balances, then write the entry — before reading the answer.
Scenario 1 — Owner puts in 15,000 to start the business
Cash (asset) up 15,000; owner's stake (equity) up 15,000. Both sides rise together.
| Account | Debit | Credit |
|---|---|---|
| Cash | 15,000 | |
| Owner contributions | 15,000 |
Equation: A +15,000 = L +0 + E +15,000.
Scenario 2 — Buy a 4,000 machine: 1,000 cash, 3,000 financed
Three effects: Equipment up 4,000, Cash down 1,000, Loan payable up 3,000. Assets net +3,000; liabilities +3,000.
| Account | Debit | Credit |
|---|---|---|
| Equipment | 4,000 | |
| Cash | 1,000 | |
| Loan payable | 3,000 |
Equation: A +3,000 = L +3,000 + E +0. Note the loan portion is not income — see recording loans correctly.
Scenario 3 — Bill a client 2,500 for finished work
Nothing paid yet: Accounts receivable (asset) up 2,500; revenue — equity's engine — up 2,500.
| Account | Debit | Credit |
|---|---|---|
| Accounts receivable | 2,500 | |
| Service revenue | 2,500 |
Equation: A +2,500 = L +0 + E +2,500. Earned is the trigger on accrual books, not paid.
Scenario 4 — Pay 950 rent
Cash down; no liability changes; equity absorbs the loss through Rent expense.
| Account | Debit | Credit |
|---|---|---|
| Rent expense | 950 | |
| Cash | 950 |
Equation: A −950 = L +0 + E −950. Expenses are anti-equity, which is why they grow with debits.
Scenario 5 — The client from scenario 3 pays the 2,500
The trap: no new revenue. One asset becomes another.
| Account | Debit | Credit |
|---|---|---|
| Cash | 2,500 | |
| Accounts receivable | 2,500 |
Equation: A +2,500 −2,500 = no change. Counting revenue again here is the classic double-count — see revenue vs. income vs. cash.
Scenario 6 — Owner draws 1,200 for personal use
Cash down; equity down. Not an expense, so profit is untouched.
| Account | Debit | Credit |
|---|---|---|
| Owner's draws | 1,200 | |
| Cash | 1,200 |
Equation: A −1,200 = L +0 + E −1,200. Draws are contra-equity, never payroll — see owner draws vs. salary.
Check the running totals
All six scenarios, cumulatively.
| After scenario | Assets | Liabilities | Equity |
|---|---|---|---|
| 1 | 15,000 | 0 | 15,000 |
| 2 | 18,000 | 3,000 | 15,000 |
| 3 | 20,500 | 3,000 | 17,500 |
| 4 | 19,550 | 3,000 | 16,550 |
| 5 | 19,550 | 3,000 | 16,550 |
| 6 | 18,350 | 3,000 | 15,350 |
Balanced on every line — as it must be, since every entry balances. And Cash tells its own story when you post all six into one T-account:
Cash — all six scenarios
| Debit | Credit |
|---|---|
| 1. Owner contribution15,000 | 2. Machine down payment1,000 |
| 5. Receivable collected2,500 | 4. Rent950 |
| 6. Owner draw1,200 |
Balance: 14,350 debit. Note that equity is 15,350 — equity and cash agree only by coincidence.
What to do next
- Redo the six without looking, on paper.
- Then run the same drill on your own last ten real transactions and compare against what your software posted.
- Wherever the software disagrees with your analysis, one of you is wrong — and finding out which is the whole exercise.
Frequently asked questions
- How do I analyze a transaction with the accounting equation?
- Ask three questions: what did the business receive, what did it give up or promise, and which of the five account types does each belong to. Map both effects onto Assets = Liabilities + Equity, confirm the equation still balances, then translate into a journal entry — debits for what increases assets and expenses, credits for what increases liabilities, equity, and revenue.
- Can a transaction change only one side of the accounting equation?
- Yes, if it swaps within a side. Buying equipment with cash trades one asset for another: assets are unchanged in total, liabilities and equity untouched, and the equation holds. Paying down a payable shrinks both sides equally. Every transaction either swaps within a side or moves both sides by the same amount.
- Why do expenses reduce equity in the accounting equation?
- Equity is the owners' residual claim, and expenses consume resources that would otherwise belong to that claim. Paying 950 of rent shrinks assets by 950 with no offsetting liability change, so equity absorbs the reduction — routed through the expense account, which closes into retained earnings at year-end.