Common Mistakes in Financial Accounting (and How to Fix Them)

Avoid the errors that cost marks and cause confusion.

Introduction

Most accounting mistakes are not “hard”—they come from skipping the process. Here are the most common errors and how to correct them.

Mistake 1: Not identifying the account type

Fix: Always label the account as A/L/E/R/Exp first.

Mistake 2: Confusing cash with revenue

Revenue can happen without cash collected (accounts receivable).

Mistake 3: Forgetting adjusting entries

Accrual accounting needs adjustments:

• Prepaid expenses

• Accrued expenses

• Unearned revenue

• Depreciation

Mistake 4: Mixing up inventory and expenses

Purchasing inventory ≠ expense until sold.

Mistake 5: Wrong direction in T-accounts

Fix: Post slowly and verify totals.

Exam strategy

Use a 3-step check:

1. Does the entry balance?

2. Does it match the transaction reality?

3. Does the statement impact make sense?