Introduction
A transaction can change several balance-sheet accounts at once, but the accounting equation must still balance afterward. Tracing each change separately helps distinguish a purchase from an expense, a customer collection from new revenue, and borrowed cash from equity contributed by shareholders. These distinctions are useful when checking reported balances and understanding how routine business activity affects a company’s financial position.
This tutorial follows common transactions through assets, liabilities, and equity. The examples assume that each stated amount is recorded at the transaction amount, that no fees, interest, taxes, depreciation, or other transactions occur unless specified, and that the company has correctly recorded its balances before the transaction.
A Method for Tracing Transactions
Start with the balances before the transaction. Identify which specific asset, liability, or equity balances increase or decrease, then calculate the new totals. Avoid deciding that a transaction changes equity merely because cash moved: cash is one asset, and its change may be offset by a change in another asset or by a liability.
Confirm that assets equal liabilities plus equity before the transaction.
For each stated event, identify every account balance that increases or decreases and by how much.
Combine the account changes with the starting balances to obtain new total assets, liabilities, and equity.
Verify that the new total assets equal new total liabilities plus new total equity.
The central check follows directly from the starting equation. If \(A=L+E\) before the transaction and the transaction changes the three totals by \(\Delta A\), \(\Delta L\), and \(\Delta E\), then:
Subtracting the original equality \(A=L+E\) from both sides gives \(\Delta A=\Delta L+\Delta E\). This is why each transaction must have a balanced effect: the change in assets must be matched by a change in liabilities, equity, or both. This identity is a check, not a substitute for correctly identifying which balances changed.
Purchases of Inventory and Equipment
Buying inventory for cash exchanges one asset for another: cash decreases while inventory increases by the same amount. Total assets do not change at the purchase date. If part of the purchase is on credit, inventory increases by the full purchase amount, cash decreases by the amount paid, and accounts payable increases for the unpaid amount. Total assets then increase by the amount purchased on credit, matched by the increase in liabilities.
Equipment bought with borrowed funds has a related pattern. The equipment asset increases by its recorded cost. Any cash paid reduces another asset, and borrowing increases a liability. The equipment purchase itself does not increase equity under the stated assumptions. The examples below treat the equipment at acquisition, without subsequent depreciation or other adjustments.
Worked Example: Inventory Purchased Partly for Cash
A company has cash of $7,000, accounts receivable of $3,000, and inventory of $5,000. Its accounts payable are $4,000 and its debt is $2,000. It purchases $3,000 of inventory, paying $2,000 in cash and owing the remaining $1,000 to a supplier. Calculate the new totals. Assume the inventory is recorded at the purchase amount and no other event occurs.
Method. Trace the full inventory increase, the cash payment, and the new amount owed. Do not treat the purchase as an immediate reduction in equity.
Starting totals. Assets are \(7{,}000+3{,}000+5{,}000=\$15{,}000\). Liabilities are \(4{,}000+2{,}000=\$6{,}000\). Therefore, starting equity is \(15{,}000-6{,}000=\$9{,}000\), and the starting equation balances.
Account changes. Cash decreases by $2,000, so cash becomes $5,000. Inventory increases by $3,000, so inventory becomes $8,000. Accounts receivable remains $3,000. Accounts payable increases by $1,000 to $5,000, while debt remains $2,000. Equity is unchanged.
New totals. Assets are \(5{,}000+3{,}000+8{,}000=\$16{,}000\). Liabilities are \(5{,}000+2{,}000=\$7{,}000\). Equity remains $9,000. The check is \(16{,}000=7{,}000+9{,}000\).
Common mistake avoided: Adding the full $3,000 purchase to total assets while ignoring the $2,000 cash payment would overstate assets. The actual asset change is \(+3{,}000-2{,}000=+\$1{,}000\), and the $1,000 increase in accounts payable explains that net increase.
Worked Example: Equipment Bought Using Cash and a New Loan
A company has cash of $24,000, inventory of $6,000, and accounts receivable of $10,000. Its accounts payable are $7,000 and existing debt is $13,000. It acquires equipment recorded at $18,000, pays $5,000 in cash, and borrows the remaining $13,000. Find the new totals. Assume no fees, depreciation, or other changes.
Method. Record the equipment asset at its stated $18,000 cost, then trace the cash payment and new borrowing separately. The loan is a liability, not an equity contribution.
Starting totals. Assets are \(24{,}000+6{,}000+10{,}000=\$40{,}000\). Liabilities are \(7{,}000+13{,}000=\$20{,}000\). Starting equity is \(40{,}000-20{,}000=\$20{,}000\).
Account changes. Cash decreases by $5,000 to $19,000. Equipment increases by $18,000. Inventory remains $6,000 and accounts receivable remains $10,000. Debt increases by $13,000 to $26,000; accounts payable remains $7,000. Equity is unchanged.
New totals. Assets are \(19{,}000+18{,}000+6{,}000+10{,}000=\$53{,}000\). Liabilities are \(7{,}000+26{,}000=\$33{,}000\). Equity remains $20,000. The check is \(53{,}000=33{,}000+20{,}000\).
Common mistake avoided: Counting the borrowed $13,000 as equity would confuse a creditor’s claim with an owner’s claim. The borrowing increases cash available to acquire the equipment, but it also increases debt; it does not increase equity.
Customer Collections and Debt Repayments
Collecting an account receivable changes the form of an asset: cash increases and accounts receivable decreases by the same amount. Total assets, liabilities, and equity are unchanged by the collection itself, assuming the receivable is collected at its recorded amount. The customer’s payment settles an existing claim; it is not a second recognition of the underlying sale.
Paying a supplier on an existing account payable reduces cash and accounts payable by the same amount. Total assets and liabilities fall equally, while equity is unchanged. A principal repayment on debt has the same basic structure: cash and the debt liability both decrease by the principal paid. These conclusions concern principal only; any interest or fees would require separate treatment.
Worked Example: Collection Followed by Payment to a Supplier
A company has cash of $12,000, accounts receivable of $8,400, and inventory of $7,600. Its accounts payable are $6,000 and debt is $9,000. It collects $5,400 from customers on existing receivables, then pays a supplier $2,100 on account. Calculate the balances after both events. Assume the collection is at the recorded amount and there are no other changes.
Method. Apply each event in order. First the collection transfers value between two asset balances; then the supplier payment reduces cash and accounts payable.
Starting totals. Assets are \(12{,}000+8{,}400+7{,}600=\$28{,}000\). Liabilities are \(6{,}000+9{,}000=\$15{,}000\), so equity is \(28{,}000-15{,}000=\$13{,}000\).
After collection. Cash becomes \(12{,}000+5{,}400=\$17{,}400\), and accounts receivable becomes \(8{,}400-5{,}400=\$3{,}000\). Inventory remains $7,600. Total assets remain \(17{,}400+3{,}000+7{,}600=\$28{,}000\).
After supplier payment. Cash becomes \(17{,}400-2{,}100=\$15{,}300\). Accounts payable becomes \(6{,}000-2{,}100=\$3{,}900\). Debt remains $9,000. Final assets are \(15{,}300+3{,}000+7{,}600=\$25{,}900\). Final liabilities are \(3{,}900+9{,}000=\$12{,}900\), and equity remains $13,000. The check is \(25{,}900=12{,}900+13{,}000\).
Common mistake avoided: Adding the $5,400 collection to total assets without removing it from receivables would count the same value twice. The collection changes the asset mix, not the total assets or equity.
Share Issues and Principal Repayments
When a company issues shares for cash, cash increases and equity increases by the proceeds under the assumptions in this tutorial. Liabilities do not change merely because shares are issued. If the company later uses cash to repay debt principal, cash and the debt liability both decrease. Combining the two transactions requires tracking both changes; it does not change the underlying effect of either event.
Worked Example: Issuing Shares and Repaying Debt
A company has cash of $10,000, property and equipment of $40,000, and accounts receivable of $5,000. It owes $8,000 in accounts payable and $22,000 in debt; its equity is $25,000. The company issues 2,000 shares for $12 per share, receiving cash, and then repays $7,000 of debt principal in cash. Calculate the ending totals. Assume no issuance costs, interest, or other transactions.
Method. Calculate the proceeds from the share issue, add them to cash and equity, and then record the cash and liability reductions from the principal repayment.
Share proceeds. The proceeds are \(2{,}000\times12=\$24{,}000\). After issuance, cash is $34,000 and equity is \(25{,}000+24{,}000=\$49{,}000\). Assets at this intermediate point are \(34{,}000+40{,}000+5{,}000=\$79{,}000\). Liabilities remain \(8{,}000+22{,}000=\$30{,}000\), and \(79{,}000=30{,}000+49{,}000\).
Debt repayment. Cash falls by $7,000 to $27,000, and debt falls from $22,000 to $15,000. Accounts payable stays $8,000. Final assets are \(27{,}000+40{,}000+5{,}000=\$72{,}000\). Final liabilities are \(8{,}000+15{,}000=\$23{,}000\). Equity remains $49,000. The check is \(72{,}000=23{,}000+49{,}000\).
Common mistake avoided: Treating the debt repayment as an expense would incorrectly reduce equity. Under the stated principal-only assumption, it settles part of a liability using cash; it does not change equity.
Patterns and Common Traps
The transaction’s economic description is not enough to determine its effect. Trace which existing balance is being settled and whether a new claim or contribution is created. The following patterns summarize the events covered here, assuming no other effects:
| Transaction | Typical balance changes | Effect on total equity |
|---|---|---|
| Inventory purchased for cash | Inventory increases; cash decreases | No change at purchase |
| Inventory purchased partly on credit | Inventory increases; cash decreases for the paid portion; accounts payable increases for the unpaid portion | No change at purchase |
| Equipment acquired partly with borrowing | Equipment increases; cash decreases for the amount paid; debt increases for the amount borrowed | No change at acquisition |
| Customer pays an existing receivable | Cash increases; accounts receivable decreases | No change from collection itself |
| Principal paid on debt | Cash and debt both decrease | No change from principal repayment itself |
| Shares issued for cash | Cash and equity increase | Increases by the proceeds under the stated assumptions |
A frequent exam trap is to treat every cash inflow as revenue or every cash outflow as an expense. A collection of a recorded receivable is an inflow of cash but also a reduction in another asset. A loan provides cash but also creates a liability. A principal repayment uses cash but reduces debt. Conversely, an inventory purchase can increase inventory even when the company pays cash immediately. Correctly tracing those balances is essential before drawing conclusions about equity.
These patterns rely on the stated conditions. If a transaction includes interest, fees, a difference between the amount collected and the recorded receivable, or a related revenue or expense, additional changes may occur. Do not apply the simplified pattern without checking whether the problem supplies such information.
Check Your Understanding
For each problem, calculate the requested ending totals. Assume no unstated transaction effects, and check that assets equal liabilities plus equity.
- A company has total assets of $22,000, liabilities of $9,000, and equity of $13,000. It buys $4,500 of inventory, paying $1,800 in cash and owing the rest to a supplier. Find the new total assets, liabilities, and equity. (Answer: Assets $24,700; liabilities $11,700; equity $13,000.)
- A business has cash of $6,200, accounts receivable of $4,800, and inventory of $9,000. It has accounts payable of $3,400 and debt of $6,600. It collects $3,200 on existing receivables and pays $1,100 on account to a supplier. Find the ending totals. (Answer: Assets $18,900; liabilities $8,900; equity $10,000.)
- A company begins with assets of $75,000, liabilities of $31,000, and equity of $44,000. It acquires equipment for $26,000, paying $8,000 cash and borrowing the remaining $18,000. Find the ending totals. (Answer: Assets $93,000; liabilities $49,000; equity $44,000.)
- A company has cash of $16,000 and other assets of $29,000, accounts payable of $7,000 and debt of $20,000, and equity of $18,000. It issues shares for $12,000 cash and then repays $5,000 of debt principal. Find the ending totals. (Answer: Assets $52,000; liabilities $22,000; equity $30,000.)
- A company begins with cash of $11,000, accounts receivable of $14,000, and inventory of $15,000. Its accounts payable are $8,000 and debt is $12,000. It buys $9,000 of inventory, paying $4,000 cash and owing $5,000; collects $6,000 on existing receivables; then repays $2,000 of debt principal. Find the ending totals. (Answer: Assets $43,000; liabilities $23,000; equity $20,000.)