Welcome to the World of Fixing Fictional (and Real) Mistakes!
In the world of financial accounting, accuracy is everything. However, because humans (and even computers) aren't perfect, mistakes happen. This chapter is all about finding those mistakes and fixing them using professional techniques. Don't worry if this seems a bit like detective work at first—once you understand the "logic" of the mistake, the correction becomes much easier!
By the end of these notes, you will be able to identify different types of accounting errors, understand which ones make your Trial Balance look "wonky," and know exactly how to fix them using Journal Entries and Suspense Accounts.
1. Two Categories of Errors
Before we dive into the specific names, you need to know that errors fall into two big buckets:
1. Errors that do NOT affect the Trial Balance: These are "sneaky" errors. The total debits still equal the total credits, so the Trial Balance looks fine, but the underlying information is wrong.
2. Errors that DO affect the Trial Balance: These are "obvious" errors. The debits and credits don't match, causing the Trial Balance to be out of balance. This is where we use a Suspense Account.
2. Errors Not Affecting the Trial Balance
These errors are tricky because the "Accounting Equation" stays in balance. Here are the six specific types you need to know for your CIMA BA3 exam:
Error of Omission
The Mistake: A transaction is completely forgotten. No entry was made in the debit side or the credit side.
Analogy: It’s like forgetting to put an item in your physical shopping basket. If you never scanned it, the receipt (Trial Balance) won't show it, but your fridge will be empty!
Example: A fuel bill for \$50 is ignored and not recorded at all.
Error of Commission
\nThe Mistake: You put the entry in the correct type of account, but the wrong personal account.
\nAnalogy: Delivering a letter to House Number 10 instead of House Number 12 on the same street. It’s still a house (the right type of account), but the wrong person got the mail.
\nExample: Recording a payment from customer J. Smith into the account of A. Smith.
Error of Principle
\nThe Mistake: This is a "big" mistake where you break a fundamental accounting rule. You put the entry into the wrong type of account.
\nImportant Point: This usually involves confusing Capital Expenditure (buying an asset) with Revenue Expenditure (paying an expense).
\nExample: Buying a new delivery van for \( \$20,000 \) but recording it as "Vehicle Repairs" (an expense). This is wrong in principle because a van is an Asset, not an Expense.
Error of Original Entry
The Mistake: The wrong amount is entered into the system from the very beginning. Both the debit and credit use the same wrong number.
Example: A sale of \( \$89 \) is recorded as \( \$98 \) in both the Sales account and the Receivables account.
Error of Reversal
The Mistake: The amounts are correct, but you got the sides wrong. You debited what should have been credited, and vice versa.
Example: You paid \( \$100 \) cash to a supplier. You should have debited the supplier and credited cash. Instead, you credited the supplier and debited cash.
Compensating Errors
\nThe Mistake: Two or more independent errors happen to cancel each other out by pure coincidence.
\nExample: You accidentally overstated Sales by \( \$100 \), and you also accidentally overstated Wages Expense by \( \$100 \). The Trial Balance still balances!
Quick Summary: These errors are hard to find because the Trial Balance still says \( \text{Total Debits} = \text{Total Credits} \). To fix them, we simply use a Journal Entry to move the money to the right place.
\n\n3. Errors That DO Affect the Trial Balance
\nWhen the Trial Balance doesn't balance, we use a Suspense Account. Think of a Suspense Account as a "temporary bucket" where we put the difference so we can finish our work while we look for the mistake.
\n\nCommon Causes of Trial Balance Imbalance:
\n• Casting Errors: Adding up a column of numbers incorrectly.
\n• Transposition Errors: Swapping two digits (e.g., writing 45 instead of 54). If the difference is divisible by 9, it’s usually a transposition error!
\n• Single-sided Entry: Making a debit but forgetting the credit.
\n• Two Debits or Two Credits: Recording both sides of a transaction on the same side.
How to clear the Suspense Account:
\nOnce you find the error, you must "empty" the bucket. If the Suspense Account has a debit balance, you will credit it to close it, and debit the account where the error was found.
\n\n4. Step-by-Step: How to Correct Errors
\nDon't worry if this seems tricky at first! Just follow these three steps for every correction:
\nStep 1: What was actually done? (The mistake)
\nStep 2: What should have been done? (The goal)
\nStep 3: What is the correction needed to get from Step 1 to Step 2?
Example: Correcting an Error of Principle
\nA business bought a machine for \( \$5,000 \) cash but recorded it as "Maintenance Expense."
1. What was done: Debit Maintenance \( \$5,000 \), Credit Cash \( \$5,000 \).
2. What should have been done: Debit Machinery (Asset) \( \$5,000 \), Credit Cash \( \$5,000 \).
3. The Fix: We need to get the \( \$5,000 \) out of Maintenance and into Machinery. Since Cash is already correct, we ignore it.
Journal Entry:
\nDebit: Machinery \( \$5,000 \)
Credit: Maintenance Expense \( \$5,000 \)
5. Impact on Profit
One of the most common exam questions is: "How does this correction affect the profit?"
Simple Trick:
• If a correction increases an Expense or decreases Income, Profit will Decrease.
• If a correction decreases an Expense or increases Income, Profit will Increase.
• Corrections involving only Assets and Liabilities (like moving a balance from one customer to another) have zero impact on profit.
Key Takeaway: Always ask yourself: "Does this account belong in the Income Statement?" If yes, profit is affected. If it only belongs in the Statement of Financial Position (Assets/Liabilities), profit stays the same.
Quick Review Box
• Omission: Forgot it entirely.
• Commission: Right type of account (e.g., both people), wrong name.
• Principle: Wrong type of account (e.g., Asset vs. Expense).
• Suspense Account: A temporary account used when the Trial Balance doesn't balance.
• Transposition Error: Numbers swapped (45 vs 54). Divisible by 9.
Top Tip: When you are correcting a "Reversal of Entry," remember you usually have to double the amount in your correction journal to cancel out the wrong side and put the correct amount on the right side!