Types of Errors in Accounting

"To err is human, but to detect and correct errors is accounting."

Even with the double-entry system, errors can occur during recording, posting, or balancing. Understanding the types of errors is crucial for rectification.

Classification of Errors

Errors are classified based on two criteria:

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Based on Nature

1. Errors of Omission

Complete Omission: Entire transaction not recorded at all.

• Example: Purchased goods for ₹10,000 but forgot to record.
• Effect on TB: Does NOT affect (both Dr. and Cr. missing).

Partial Omission: One aspect of the transaction is missing.

• Example: Debited Purchases ₹10,000 but forgot to credit Supplier.
• Effect on TB: AFFECTS (Dr. ≠ Cr.).

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2. Errors of Commission

Wrong posting of correct amount to the wrong account of the same class.

Types:

• Wrong Account: Payment to Ram posted to Shyam's account (both are creditors).
• Wrong Side: Amount posted on wrong side (Dr. instead of Cr.).
• Wrong Totaling: Incorrect addition/subtraction.
• Wrong Balancing: Balance calculated incorrectly.

Example: Paid ₹5,000 to creditor Ram, but posted to creditor Mohan.

• Effect on TB: Does NOT affect if amount and side are correct.

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3. Errors of Principle

Transaction recorded in violation of accounting principles.

Example: Purchase of furniture (asset) debited to Purchases A/c (expense).

• Correct Entry:

  Furniture A/c            Dr.    ₹50,000
      To Cash A/c                     ₹50,000
  

• Wrong Entry:

  Purchases A/c            Dr.    ₹50,000
      To Cash A/c                     ₹50,000
  

• Effect on TB: Does NOT affect (both Dr. and Cr. posted correctly, but wrong accounts).

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4. Compensating Errors

Two or more errors that cancel each other out.

Example:

• Error 1: Sales overstated by ₹1,000 (excess credit).
• Error 2: Purchases overstated by ₹1,000 (excess debit).
• Effect on TB: Does NOT affect (errors compensate).

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Based on Effect on Trial Balance

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Detailed Examples

Example 1: Error of Omission (Partial)

Transaction: Purchased goods for ₹8,000 from Mohan on credit.

Correct Entry:

Purchases A/c            Dr.    ₹.8,000
    To Mohan A/c                    ₹8,000

Error: Only Purchases A/c debited, Mohan A/c not credited.

Effect:

• Trial Balance will NOT tally (Debit > Credit by ₹8,000).

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Example 2: Error of Commission

Transaction: Received ₹5,000 from debtor Ramesh.

Correct Entry:

Cash A/c                 Dr.    ₹5,000
    To Ramesh A/c                   ₹5,000

Error: Credited to Suresh A/c instead of Ramesh A/c.

Effect:

• Trial Balance WILL tally (₹5,000 Dr., ₹5,000 Cr.).
• But Ramesh's account shows wrong balance.
• Suresh's account also shows wrong balance.

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Example 3: Error of Principle

Transaction: Purchased computer for office use ₹60,000.

Correct Entry:

Computer A/c             Dr.    ₹60,000
    To Cash A/c                     ₹60,000

Error: Debited to Purchases A/c.

Purchases A/c            Dr.    ₹60,000
    To Cash A/c                     ₹60,000

Effect:

• Trial Balance WILL tally.
• But Profit & Loss will be wrong (expense overstated).
• Balance Sheet will be wrong (asset understated).

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Example 4: Compensating Error

Errors:

1. Sales Book total: ₹50,000 posted as ₹55,000 (excess Cr. ₹5,000).
2. Purchases Book total: ₹30,000 posted as ₹35,000 (excess Dr. ₹5,000).

Effect:

• Trial Balance WILL tally (both sides overstated by ₹5,000).
• But individual accounts are wrong.

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One-Sided vs Two-Sided Errors

One-Sided Examples:

• Wrong totaling of Cash Book
• Posting ₹5,000 as ₹500
• Omitting to post credit side

Two-Sided Examples:

• Complete omission
• Error of principle
• Compensating errors

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Real-World Case

Satyam Scam (2009) - Error or Fraud?

Satyam Computer Services overstated:

• Revenue by ₹5,000+ Crores
• Assets (fake cash) by ₹5,000+ Crores

Type of Error: This was NOT an error—it was deliberate fraud.

But from an accounting perspective, it was an Error of Principle (fake transactions recorded) combined with Error of Commission (wrong amounts).

Lesson: Internal controls and audits are essential to detect such issues.

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Quiz: Types of Errors