What Is a Journal Entry? Format, Types & Examples (2026)

August 18, 2026 4 Min Read

A journal entry is the record of a single deal in a business’s books. It shows exactly which accounts it touches and by how much. Every journal entry has at least one debit and one credit, then, and the two always add up to the same total.

It’s the smallest building block of a set of accounts. Every trial balance, every balance sheet, every profit figure, in the end, traces back to a string of journal entries recorded right, one deal at a time.

Quick Answer

A journal entry records a transaction using matching debits and credits across at least two accounts. It includes a date, the accounts involved, the amounts, and a short description. Journal entries feed the general ledger, which then feeds the trial balance and financial statements.

What a Journal Entry Includes

A properly recorded journal entry, then, has a few standard parts:

Date of the transaction
Reference number, so it can be found and checked later
Accounts affected, with the debit and credit amounts against each
Equal debit and credit totals — this is non-negotiable, not optional
A short description, explaining what the entry is for and why

That description matters more than it looks. Come back to an entry six months later, and a clear note is often the only way to recall why someone made it.

How Debits and Credits Work in a Journal Entry

This is where most beginners get stuck, so here’s the rule in plain terms:

Account type	Debit increases	Credit increases
Assets	Yes	No
Expenses	Yes	No
Liabilities	No	Yes
Equity	No	Yes
Revenue	No	Yes

Assets and costs grow with debits. Debt, equity, and sales grow with credits. Every journal entry follows this pattern. Once it clicks, the logic stays the same across each deal a business ever records.

The 6 Types of Journal Entries

Not every entry serves the same purpose. The main categories:

Opening entries — set up account balances at the start of a new period.
Closing entries — clear short-term accounts like sales and costs into equity at period end.
Transfer entries — move value between two accounts inside the business, with no outside party involved.
Adjusting entries — fix timing issues, like accrued costs or prepaid income, so each period shows the right numbers.
Compound entries — touch more than two accounts at once, when one deal affects several areas.
Reversing entries — undo an accrual entry at the start of the next period, so nothing gets counted twice.

Most day-to-day bookkeeping uses simple two-account entries. The other types come up mainly at period-end close, or when a deal genuinely spans several accounts.

A Simple Journal Entry Example

Say a business pays a $500 supplier bill from its bank account. The journal entry looks like this:

Account	Debit	Credit
Accounts Payable	$500
Cash		$500

The debit cuts the debt (less owed to the supplier). The credit cuts the asset (less cash on hand). Both sides equal $500, so the entry balances, and the deal is now fully on the books.

Common Mistakes

A handful of errors show up often, especially early on:

Unequal debits and credits. If the two sides don’t match, then the entry is simply wrong.
Vague descriptions. “Misc entry” tells nobody anything six months later.
Posting to the wrong account. This won’t break the balance. Still, it does throw off the real numbers.
Forgetting reversing entries. Skip this step, and an accrual can get double-counted in the next period.
Backdating without a clear reason. Journal entries should reflect when a transaction actually happened, not when it was convenient to enter it.

FAQ

What is a journal entry in simple terms?
It’s the record of one transaction, showing which accounts it affects and by how much, split between matching debits and credits.

Do debits and credits always have to be equal in a journal entry?
Yes. That balance is the whole foundation of double-entry bookkeeping. An entry that doesn’t balance, then, is an entry with an error in it.

What’s the difference between a journal entry and a ledger?
A journal entry records one transaction. The general ledger collects every journal entry, organised by account, building the full picture used for the trial balance and financial statements.

What is an adjusting journal entry?
An entry made at period end to correct timing, such as recognising an expense that’s been incurred but not yet billed, so the numbers reflect the right period.

Why do reversing entries exist?
To undo an accrual entry at the start of a new period, so the same expense or income doesn’t accidentally get counted twice once the real transaction comes through.

How many accounts can one journal entry affect?
At least two, but a compound entry can affect several accounts at once, as long as total debits still equal total credits.