Journal Entry: What It Is & How Bookkeepers Use It

Journal Entry: What It Is & How Bookkeepers Use It

Every number in your client's books traces back to a journal entry. It's the atomic unit of double-entry bookkeeping: one transaction recorded as at least one debit and one credit, always balanced. Master this and the whole general ledger makes sense.

What is a journal entry in accounting?

A journal entry is the record of a financial transaction in the general ledger. Each entry has a date, at least one account debited and one account credited, a dollar amount, and a memo. The debit side and credit side must equal each other. When a business pays a $500 utility bill, the entry debits Utilities Expense $500 and credits Checking $500. Double-entry accounting requires every transaction to affect at least 2 accounts. Software like QBO creates most journal entries automatically when you record invoices, bills, or payments. Bookkeepers hand-key entries for accruals, reclassifications, write-offs, and corrections.

Key Takeaways

• Journal entries are the foundation of double-entry accounting - every transaction must have equal debits and credits, no exceptions.
• 4 types exist for different purposes - general (daily transactions), adjusting (period-end corrections), closing (year-end resets), and reversing (next-period cleanup).
• Software creates most JEs automatically - QBO generates a journal entry behind the scenes every time you record an invoice, payment, or bank transaction.
• Hand-keyed JEs cover the gaps software can't fill - write-offs, reclassifications, accruals, and transfers between accounts all require manual entries.
• Unbalanced entries won't save in QBO - the system blocks you if debits don't equal credits, which catches most input errors on the spot.
• Every JE needs a memo - without one, you or your client's CPA will spend 20 minutes tracing the transaction during a review.

What a Journal Entry Actually Is

Journal entries live in the Growthy glossary of bookkeeping fundamentals for a reason: without them, nothing in the books moves. A journal entry records the effect of a business event across at least 2 accounts. One side gets a debit, one side gets a credit, and they always balance. Understanding how credits and debits work is the prerequisite to reading any journal entry correctly.

Before accounting software, bookkeepers wrote entries in a physical book called a journal. The name stuck. The concept hasn't changed. The execution is faster now.

Anatomy of a Journal Entry

Every journal entry has the same five components:

Date. When the transaction occurred, not when you're recording it. Dating a December expense to January throws off both months.

Accounts. At least one account gets a debit, at least one gets a credit. Complex entries can have multiple accounts on each side, as long as total debits equal total credits.

Debit and credit amounts. Debits increase assets and expenses. Credits increase liabilities, equity, and revenue. This trips people up because it's opposite to how bank accounts use the terms.

Memo. "Reclassify Q3 office supplies from meals" is useful. "JE" is not.

Reference number. Software assigns this automatically. It links the JE to source documents.

The 4 Types of Journal Entries

General journal entries record standard transactions: sales, purchases, payroll, loan payments. Software generates these automatically. When you enter a vendor bill in QBO, it creates a JE debiting the expense account and crediting Accounts Payable. You rarely hand-key these.

Adjusting journal entries fix the gap between when cash moves and when the transaction actually happened. Recording prepaid insurance that expired, accruing wages not yet paid, booking depreciation. These happen at period-end, usually during month-end close, and most require a bookkeeper to hand-key them.

Closing journal entries happen at fiscal year-end. They zero out revenue and expense accounts by moving their balances to retained earnings. This resets the P&L for the new year. QBO handles this automatically when you set a closing date.

Reversing journal entries flip an adjusting entry in the next period. You accrued $3,000 of wages in December. In January, you post a reversing entry that credits wages expense $3,000. When the actual payroll posts, the two entries net to zero. No double-counting.

When to Hand-Key vs Let Software Auto-Create

Software handles standard transactions. You hand-key when there's no form for what you need to do:

Reclassifications. Transaction coded to the wrong account in a closed period. Post a JE to move it.

Write-offs. Uncollectable customer balance. Debit Bad Debt Expense, credit Accounts Receivable.

Accruals. Expense before the bill arrives, or revenue before cash comes in. Common for rent, payroll, subscriptions, interest.

Depreciation. If your software doesn't handle fixed assets natively, you book it with a manual JE.

Transfers between accounts. Moving money between banks, paying down a credit card from checking, recording an owner contribution.

Error corrections. Duplicate entry or transposed amount in a prior period? A correcting JE fixes it without touching the original.

How to Record a Journal Entry in QuickBooks Online

1. Go to + New, then select Journal Entry under the Other column.
2. Set the Journal Date to when the transaction occurred.
3. First line: choose the account to debit, enter the amount in the Debit column.
4. Second line: choose the account to credit, enter the same amount in the Credit column.
5. Add a memo to both lines.
6. The difference at the bottom must be $0.00 before QBO lets you save.
7. Click Save and close.

QBO blocks saving if debits don't equal credits. That's intentional. Use it to catch typos before they hit the books.

Check the date every time. It's easy to leave today's date on a December entry you're booking in January. That entry lands in the wrong month and skews both periods.

Common Gotchas

Unbalanced entry. QBO won't save if debits and credits don't match. Check for a typo in the amount or a missing line.

Wrong period date. A December accrual booked to January never hits December financials. Your client's year-end reports will be off.

JE to a closed period. QBO shows a warning but doesn't block it. Posting to a closed period changes already-reported numbers. Confirm with your client first.

Missing memo. "JE 1042" tells nobody anything. Write a memo that makes sense to someone who wasn't there: "Accrue December rent not yet paid - $2,400."

Reversing entry not posted. You accrued December wages. January payroll posts. Wages expense is now double-counted. Build a checklist for recurring accruals that need reversals.

How Growthy Handles Journal Entries

Growthy categorizes imported transactions against your chart of accounts automatically, reaching 85% accuracy on first import. Standard transactions that generate behind-the-scenes journal entries, like cleared payments and matched invoices, land in the right accounts without manual work.

For transactions that need a hand-keyed JE, Growthy flags uncategorized and mismatched items so you see exactly what needs attention. For returning clients, accuracy reaches 90%+ after 30 days. See how Growthy handles JE posting.

Frequently Asked Questions

What's the difference between a journal entry and a transaction? A transaction is the business event (a sale, a payment, a purchase). A journal entry is how that event gets recorded in the accounting system. Every transaction produces at least one journal entry. Software creates most of them automatically through invoices, bills, and bank feeds.

Do journal entries have to balance? Yes, always. Total debits must equal total credits. If they don't, the trial balance won't balance and you have an error in the general ledger.

When would a bookkeeper use a journal entry instead of the normal transaction forms? Use a journal entry when there's no matching transaction form: accruals, reclassifications, write-offs, depreciation, owner draws, or corrections to prior periods. For invoices, bills, and payments, use the dedicated forms. They're faster and create cleaner audit trails.

Can you delete a journal entry in QuickBooks? Yes, but voiding is better practice. Deleting removes the JE from the audit log. Voiding leaves a trace. For closed-period JEs, post a reversing entry in the current period instead of touching the original.

What happens if I post a journal entry to the wrong account? Post a correcting entry: credit the wrong account, debit the right one (or vice versa). Don't edit the original if it's in a closed period or has already been reconciled.

Journal entries are the language of accounting. Every invoice, payment, and month-end accrual reduces to debits and credits. Once you see how the 4 types fit together, and when to hand-key versus let software handle it, the books stop being a mystery.

Ready to cut time on manual categorization? Start with Growthy and let the pattern recognition handle standard transactions while you focus on the entries that need your judgment.