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Understanding Journal Entries: The Foundation of Bookkeeping

Learn how to record transactions properly with debits and credits. We walk through real examples so you actually understand what’s happening.

12 min read Beginner March 2026
Open accounting ledger with handwritten entries and calculator on desk

What Are Journal Entries?

Journal entries are the starting point of every bookkeeping system. They’re how you record what happened with your money. When a customer pays you, when you buy supplies, when you pay rent — that’s all captured in journal entries.

Think of it like this: your business is constantly moving money around. A journal entry is simply the written record of that movement. It’s the foundation everything else is built on. Without accurate journal entries, your entire financial picture becomes unreliable. And if you’re trying to make decisions about your business, you’re working with bad information.

The good news? The system isn’t complicated. It’s actually quite logical once you understand the basic principle: every transaction has two sides. Money comes from somewhere and goes somewhere else. That’s the core of double-entry bookkeeping, and it’s been the standard for hundreds of years because it works.

Professional accountant writing in ledger at organized desk with financial documents
Comparison diagram showing debit and credit columns in accounting ledger format

Debits and Credits: The Two Sides of Every Transaction

This is where people usually get confused. Debits and credits aren’t “bad” and “good.” They’re just directions money moves. Let’s break it down.

In accounting, accounts fall into different categories. Assets are things you own (cash, equipment, inventory). Liabilities are things you owe (loans, accounts payable). Equity is what’s left after you subtract liabilities from assets — essentially the owner’s stake in the business.

For Assets:

Debits increase them, credits decrease them. You buy equipment (debit), you sell it (credit).

For Liabilities:

Credits increase them, debits decrease them. You borrow money (credit), you pay it back (debit).

For Equity:

Credits increase it, debits decrease it. You contribute money (credit), you withdraw it (debit).

Every journal entry must balance. Total debits equal total credits. That’s the safeguard that keeps everything honest. If they don’t match, you’ve made an error somewhere.

Real Example: You Sell a Service

Let’s say you’re running a small bookkeeping service. A client pays you $2,000 for March consulting work. Cash goes into your bank account. Revenue is recorded. Here’s the journal entry:

Debit: Cash $2,000
Credit: Service Revenue $2,000

Cash is an asset. You’re increasing it (debit). Service Revenue is income. You’re increasing it (credit). The entry balances: $2,000 on each side.

Now imagine you buy office supplies for $150 cash. The entry looks like this:

Debit: Supplies Expense $150
Credit: Cash $150

You’re decreasing cash (credit), increasing an expense (debit). Again, balanced. The logic stays consistent once you understand the rules.

Close-up of handwritten journal entries showing date, account names, and dollar amounts in ledger columns

Common Journal Entries You’ll Make

As a small business owner, you’re going to see these entries repeatedly. Getting familiar with them means you’ll spot errors faster and understand your books better.

Customer Payment Received

Debit: Cash, Credit: Accounts Receivable (or Revenue). When money actually arrives, you record the increase in cash and decrease what customers owe you — or increase revenue if you’re invoicing immediately.

Paying a Bill

Debit: Expense (or Accounts Payable), Credit: Cash. You’re reducing cash and either reducing what you owe or increasing an expense depending on whether you recorded the bill earlier.

Equipment Purchase

Debit: Equipment (Asset), Credit: Cash. You’re trading one asset (cash) for another (equipment). No profit or loss here — just moving money between accounts.

Loan Received

Debit: Cash, Credit: Loan Payable (Liability). You’re increasing cash and increasing what you owe. The bank money isn’t revenue — it’s a debt you’ll repay.

Loan Payment

Debit: Loan Payable, Credit: Cash. You’re decreasing the debt and decreasing cash. Part of that payment is interest (an expense), part reduces the principal (the liability).

Paying Yourself

Debit: Owner’s Draw, Credit: Cash. You’re withdrawing profit from the business. It’s not an expense — it’s a reduction in equity. Different from paying yourself a salary, which is an expense.

Why Accuracy Matters: Beyond Compliance

You might think accurate journal entries only matter for taxes or audits. That’s thinking too small. Your journal entries are the data your entire business runs on.

If your entries are sloppy, your financial statements lie to you. You might think you’re profitable when you’re actually losing money. You might miss cash flow problems until it’s too late. You’ll make business decisions based on false information.

Plus, when tax time comes around, the CRA expects your books to be accurate. If you can’t explain your entries, you can’t defend your tax return. We’ve all heard stories about audits going badly. Most of them start with poor record-keeping.

The good news is that accuracy gets easier with systems. Use accounting software (QuickBooks, Wave, FreshBooks). Set up templates for recurring entries. Review your entries weekly instead of cramming it all in at year-end. These habits take maybe an extra hour per week and save you massive headaches later.

Accountant reviewing financial statements and journal entries on laptop with organized spreadsheets

Practical Tips for Recording Entries Like a Pro

You don’t need to be an accountant to record solid journal entries. These practical habits will keep your books clean and save you time.

01

Record Entries Daily

Don’t wait until month-end. When you process an invoice or pay a bill, record it immediately. Your memory fades. Details get fuzzy. Daily entry keeps everything fresh and accurate.

02

Use a Consistent Chart of Accounts

Create account names that make sense to you and stick with them. If you use “Office Supplies” one month and “Supplies Expense” the next, your reports become a mess. Consistency makes everything easier.

03

Include Supporting Documentation

Save your receipts, invoices, and bank statements. When you’re reviewing entries later (or during an audit), you need proof of what happened. It only takes a few seconds to attach a document or note the reference.

04

Double-Check Before Posting

Before you hit “save,” verify: Do the debits equal credits? Is the account correct? Is the amount accurate? These 30 seconds prevent hours of tracking down errors later.

05

Use Software, Not Spreadsheets

Spreadsheets are great for analysis, but accounting software is built for journal entries. It prevents you from creating unbalanced entries. It auto-posts to multiple accounts. It generates reports instantly. It’s worth the investment.

06

Review Monthly Trial Balance

A trial balance shows all your accounts with their balances. Every month, print it out and look for anything unusual. A $10,000 jump in an account you don’t remember? That’s your red flag to investigate.

Key Takeaways

Every transaction requires a journal entry recording both sides of the movement

Debits and credits follow consistent rules based on account type (assets, liabilities, equity, income, expense)

Balanced entries (debits = credits) are your quality control and foundation for accurate financial reports

Daily recording, clear documentation, and software tools make the process reliable and efficient

Ready to Master Your Bookkeeping?

Journal entries are just the beginning. The next step is understanding how these entries flow into your ledger, and then into your financial statements. Once you’ve got that foundation solid, managing your books becomes straightforward.

Educational Disclaimer

This article is provided for educational purposes to help you understand bookkeeping fundamentals and the journal entry process. While we’ve made every effort to present accurate information, bookkeeping practices can vary based on your business structure, jurisdiction, and specific circumstances. Tax laws and accounting standards change frequently.

This content is not professional accounting or tax advice. If you need guidance specific to your situation — especially regarding tax implications, regulatory compliance, or complex transactions — consult with a qualified accountant or bookkeeper in your province. Professional advisors can ensure your records meet all applicable Canadian tax and accounting standards.