If you’ve read our previous guides on What Is Double-Entry Bookkeeping?, Debits and Credits Explained, and The Accounting Equation, you already understand the core principles behind modern bookkeeping.

Now it’s time to put those principles into practice.

Every financial transaction your business makes—whether it’s receiving customer payments, paying suppliers, purchasing equipment, or taking out a loan—is recorded using a journal entry.

Journal entries are the starting point of every accounting system. They create a permanent record of your business transactions and ensure your books remain balanced.

In this guide, you’ll learn:

• What a journal entry is
• Why journal entries are important
• The parts of a journal entry
• How to record transactions correctly
• Real-world journal entry examples
• Common mistakes to avoid

By the end of this article, you’ll understand how accountants record transactions and why journal entries are the foundation of accurate bookkeeping.

What Is a Journal Entry?

A journal entry is the first formal record of a financial transaction in your accounting system.

Every transaction is entered into the general journal before being organised into the general ledger.

Each journal entry records:

• The transaction date
• The accounts affected
• The debit amount
• The credit amount
• A brief description of the transaction

Every journal entry follows the rules of double-entry bookkeeping, meaning total debits must always equal total credits.

Why Are Journal Entries Important?

Journal entries create a complete record of your business activities.

Without them, it would be impossible to prepare accurate financial statements or identify accounting errors.

Proper journal entries help you:

• Keep accurate financial records
• Maintain balanced accounts
• Produce financial reports
• Support tax reporting
• Create an audit trail
• Track every business transaction

Whether you’re using accounting software or recording transactions manually, journal entries remain the foundation of the bookkeeping process.

The Anatomy of a Journal Entry

A standard journal entry contains five key elements.

A typical journal entry looks like this:

Date: 15 January 2026

Debit:   Office Equipment        £1,200

Credit:  Bank                    £1,200

Description:

Purchased a new office computer.

Notice that the debit and credit amounts are always equal.

How to Record a Journal Entry

Recording journal entries becomes much easier if you follow the same process every time.

Step 1: Identify the Transaction

Ask yourself:

What happened?

Examples include:

• A customer paid an invoice.
• You bought office supplies.
• You paid rent.
• You received a business loan.

Step 2: Identify the Accounts Affected

Every transaction affects at least two accounts.

For example:

Buying office furniture affects:

• Office Furniture (Asset)
• Bank (Asset)

Step 3: Decide Which Accounts Increase or Decrease

Determine whether each account is increasing or decreasing.

Remember:

• Assets increase with debits.
• Liabilities increase with credits.
• Equity increases with credits.
• Revenue increases with credits.
• Expenses increase with debits.

Step 4: Record the Journal Entry

Once you’ve identified the accounts and determined how they change, record the debit and credit.

Finally, check that:

Total Debits = Total Credits

If they don’t match, the journal entry is incorrect.

Journal Entry Examples

Example 1 – Customer Pays Cash

A customer pays £750 immediately for services.

Explanation:

• Cash increases.
• Revenue increases.

Example 2 – Buying Equipment

You purchase office equipment costing £2,000 using your business bank account.

Explanation:

One asset increases while another asset decreases.

Example 3 – Purchasing Inventory on Credit

You buy inventory worth £5,000 from a supplier.

Payment is due in 30 days.

Explanation:

Inventory increases.

A liability is created because payment hasn’t yet been made.

Example 4 – Paying Rent

You pay monthly office rent of £900.

Explanation:

Expenses increase with a debit.

Cash decreases with a credit.

Example 5 – Taking Out a Business Loan

The business receives a £25,000 loan.

Explanation:

Cash increases.

The business now owes money to the lender.

Example 6 – Paying a Supplier

You pay a supplier £2,000 for a previous invoice.

Explanation:

The liability decreases because you’ve settled the debt.

Compound Journal Entries

Not every transaction affects only two accounts.

Some transactions require multiple debits or credits.

Example:

A customer pays £500, but your payment processor charges a £15 fee.

Although three accounts are involved, the journal entry still balances.

Common Journal Entry Mistakes

Beginners often make the same errors.

These include:

• Recording only one side of the transaction.
• Mixing up debits and credits.
• Posting to the wrong account.
• Forgetting the transaction description.
• Entering incorrect amounts.

A good habit is to review every journal entry before posting it to the ledger.

Journal Entries vs General Ledger

These two terms are often confused.

Here’s the difference.

Think of the journal as a diary of transactions and the ledger as an organised filing system.

Final Thoughts

Journal entries are the building blocks of every accounting system.

They provide the first official record of every financial transaction and ensure your books remain accurate and balanced.

By following a simple process—identify the transaction, determine the accounts affected, apply the correct debits and credits, and verify that the entry balances—you can confidently record even complex business transactions.

Whether you manage your books manually or use accounting software, understanding journal entries is an essential skill for every business owner and aspiring bookkeeper.