What is the accounting equation?

Published Thursday 23 July 2026

Table of contents

• What is the accounting equation?
• The accounting equation formula
• Components of the accounting equation
• How does the accounting equation work?
• Accounting equation examples
• The expanded accounting equation
• What happens if the accounting equation doesn't balance?
• Why the accounting equation matters for your business
• Simplify your accounting with Xero
• FAQs on the accounting equation

Key takeaways

• The accounting equation (Assets = Liabilities + Equity) is the foundation of double-entry bookkeeping and ensures your books always balance.
• Every business transaction affects at least 2 accounts, keeping the equation in check and giving you an accurate picture of your financial position.
• Understanding each component helps you track what your business owns, what it owes, and what belongs to you as the owner.
• Accounting software like Xero applies the accounting equation automatically, so you can focus on running your business instead of manually balancing your books.

What is the accounting equation?

The accounting equation states that a business's total assets equal the sum of its liabilities and equity. It's the fundamental principle behind every financial transaction your business records.

You might also hear it called the balance sheet equation or the basic accounting equation. Regardless of the name, the concept is the same: everything your business owns is funded either by money you owe (liabilities) or money you've invested and earned (equity).

This equation matters because it keeps your financial records accurate and consistent. If your books don't balance, something has gone wrong, and your financial statements won't reflect the true state of your business.

The accounting equation formula

The standard accounting equation formula is:

Assets = Liabilities + Equity

You can also rearrange it to find equity directly:

Equity = Assets - Liabilities

This rearranged version is a practical way to work out how much of your business you truly own. Subtract what you owe from what you have, and you're left with your equity.

Each component represents a key part of your financial position. Assets are the resources your business owns. Liabilities are the debts and obligations you owe. Equity is what's left over for you as the owner.

Components of the accounting equation

Each element of the accounting equation plays a distinct role in your business finances. Here's a closer look at what they include.

Assets

Assets are the resources your business owns or controls that have economic value. They can be physical items or intangible rights that contribute to your operations.

Common examples for Australian small businesses include:

• Cash in your business bank account
• Equipment and machinery
• Inventory or stock on hand
• Vehicles
• Accounts receivable (money customers owe you)
• Office furniture and computers

Liabilities

Liabilities are the debts and financial obligations your business owes to others. They represent claims that external parties have on your assets.

Common examples include:

• Business loans
• Credit card balances
• Accounts payable (money you owe suppliers)
• Tax obligations (GST, PAYG, income tax)
• Employee entitlements (wages, superannuation, leave)

Equity

Equity represents your ownership stake in the business. It's the portion of assets that belongs to you after all liabilities are paid off.

Common examples include:

• Owner's capital (money you've invested in the business)
• Retained earnings (profits kept in the business over time)
• Drawings (money or assets you've taken out for personal use, which reduce equity)

How does the accounting equation work?

The accounting equation works through double-entry bookkeeping. Every time your business makes a transaction, it affects at least 2 accounts. This keeps both sides of the equation in balance.

For example, if you buy a new laptop for $1,500 using your business bank account, your equipment (an asset) increases by $1,500, and your cash (another asset) decreases by $1,500. The total on the left side of the equation stays the same, and the equation remains balanced.

If you'd bought that laptop with a business credit card instead, your equipment (asset) would increase by $1,500, and your credit card balance (liability) would also increase by $1,500. Both sides of the equation go up equally, so it still balances.

This dual effect is the reason your books stay accurate. No single transaction can throw the equation off, as long as it's recorded correctly.

Accounting equation examples

Seeing the accounting equation in action makes it easier to understand. Here are a few practical examples relevant to running a small business in Australia.

Starting a cafe with personal savings

You invest $30,000 of your own money to open a cafe. Your business now has $30,000 in cash (assets), no debts (liabilities), and $30,000 in owner's equity.

Assets ($30,000) = Liabilities ($0) + Equity ($30,000)

Taking out a business loan to buy equipment

You take out a $20,000 bank loan to purchase coffee-making equipment. Your assets increase by $20,000 (the equipment), and your liabilities increase by $20,000 (the loan).

Assets ($50,000) = Liabilities ($20,000) + Equity ($30,000)

Selling inventory on credit

You sell $5,000 worth of catering supplies to a local business on 30-day payment terms. Your inventory (asset) decreases by $5,000, and your accounts receivable (another asset) increases by $5,000. Total assets stay the same, and the equation balances.

Assets ($50,000) = Liabilities ($20,000) + Equity ($30,000)

Receiving a payment from a customer

A customer pays a $75,000 invoice. Before the payment, your business had $75,000 in assets, $50,000 in liabilities, and $25,000 in equity. The payment moves value from accounts receivable to cash, but total assets, liabilities, and equity stay unchanged.

Assets ($75,000) = Liabilities ($50,000) + Equity ($25,000)

The expanded accounting equation

The basic accounting equation gives you a high-level snapshot, but the expanded version offers more detail about what makes up your equity. It breaks equity down into its individual parts:

Assets = Liabilities + Owner's Capital + Revenue - Expenses - Drawings

Here's what the additional components mean:

• Revenue: the income your business earns from sales or services
• Expenses: the costs of running your business (rent, wages, utilities, supplies)
• Drawings: money or assets you take out of the business for personal use

The expanded equation is useful because it shows how your day-to-day operations affect your ownership stake. Revenue increases equity, while expenses and drawings reduce it. This gives you a clearer view of whether your business is growing or shrinking over a given period.

What happens if the accounting equation doesn't balance?

If your accounting equation doesn't balance, it means there's an error in your records. Your financial statements won't accurately reflect your business's position, which can lead to poor decisions and compliance issues.

Common causes include:

• Recording a transaction in only 1 account instead of 2
• Entering the wrong amount for a transaction
• Duplicating an entry
• Missing a transaction entirely
• Misclassifying an expense as an asset, or vice versa

To fix an imbalance, review your recent entries and look for discrepancies. Check that every transaction has been recorded with equal debits and credits. Reconciling your bank accounts regularly helps you catch errors early.

Accounting software like Xero handles double-entry bookkeeping automatically. When you record a transaction, Xero updates both sides of the equation for you, which reduces the risk of manual errors and keeps your books balanced.

Why the accounting equation matters for your business

The accounting equation is more than a textbook concept. It's the foundation of your balance sheet, which is 1 of the 3 core financial statements every business needs.

When the equation balances, you can trust that your financial records are accurate. This gives you a reliable basis for tracking cash flow, managing debts, and making informed decisions about spending, hiring, or investing.

The equation also helps you assess your business's solvency. If your assets consistently exceed your liabilities, your business is in a healthy financial position. If liabilities start to outweigh assets, it's a signal to take action before cash flow problems develop.

With Xero, the accounting equation works behind the scenes every time you reconcile a bank transaction, send an invoice, or record an expense. Your balance sheet updates in real time, so you always have a current view of your financial position without doing the maths yourself.

Simplify your accounting with Xero

Understanding the accounting equation gives you a solid foundation for managing your business finances. It helps you read your balance sheet with confidence and spot potential issues before they become problems.

Xero takes care of the double-entry bookkeeping for you automatically. Every transaction you record updates your accounts, balances your books, and feeds into real-time financial reports. You can spend less time on manual data entry and more time growing your business. Get one month free.

FAQs on the accounting equation

Here are answers to frequently asked questions about the accounting equation.

Why is the accounting equation important?

The accounting equation ensures every financial transaction is recorded accurately across at least 2 accounts. It's the foundation of your balance sheet and gives you a reliable way to monitor your business's financial health.

What are the 3 elements of the accounting equation?

The 3 elements are assets (what your business owns), liabilities (what your business owes), and equity (the owner's stake in the business after liabilities are subtracted from assets).

What is an example of the accounting equation in action?

If you invest $30,000 into your business, you'd have $30,000 in assets (cash), $0 in liabilities, and $30,000 in equity. The equation balances: $30,000 = $0 + $30,000.

What is the difference between the basic and expanded accounting equation?

The basic equation is Assets = Liabilities + Equity. The expanded equation breaks equity into its parts: Owner's Capital + Revenue - Expenses - Drawings, giving you more detail about how daily operations affect your ownership stake.

What happens when the accounting equation doesn't balance?

An imbalance means there's an error in your records, such as a missing entry, a duplicate, or a misclassified transaction. Reviewing recent entries and reconciling your bank accounts regularly helps you find and fix these errors quickly.