The accounting equation
Learn what the accounting equation is, how the formula works, and why it matters for your small business.
Published Thursday 23 July 2026
Table of contents
Key takeaways
- The accounting equation states that a business's assets always equal its liabilities plus its equity.
- The 3 components are assets (what you own), liabilities (what you owe), and equity (what's left over, or your net worth).
- It's the foundation of double-entry bookkeeping and the structure behind every balance sheet.
- Tracking it helps you see your net worth, check solvency, and understand your financial health at a glance.
Before you can read a balance sheet or trust your numbers, it helps to understand the one rule that holds them together.
What is the accounting equation?
The accounting equation is the rule that a business's assets always equal its liabilities plus its equity.
It's the starting point of all standard bookkeeping, and it stays true for every business on any day. If the two sides don't match, something in the books has been recorded incorrectly.
The equation is short enough to memorize, and it works in more than one direction.
The accounting equation formula
The formula is written as Assets = Liabilities + Equity. This says everything you own is funded either by money you owe or by money that belongs to the business.
You can rearrange it to find equity directly, which is often the more intuitive way to think about it: Assets - Liabilities = Equity. In plain terms, what you own minus what you owe leaves what the business is actually worth.
The equation is built from 3 parts, and each one covers a specific slice of your finances.
Components of the accounting equation
Understanding the 3 components makes the whole equation easier to apply to your own business.
Assets are the first side of the equation and represent everything the business controls.
Assets
Assets are the things your business owns, including cash, equipment, inventory, and money customers owe you. They also cover intangible items such as trademarks, patents, and goodwill. You can explore this further in the Xero glossary entry on assets.
Liabilities sit on the other side and represent claims against those assets.
Liabilities
Liabilities are the amounts your business owes to others, such as unpaid bills, bank overdrafts, loans, and tax owing. They're obligations you'll need to settle in the future. For more detail, see the Xero glossary entry on liabilities.
Equity is what remains once you account for everything you own and everything you owe.
Equity
Equity is the net worth of your business: the value left for the owners after liabilities are subtracted from assets. It reflects the owner's stake in the business. You can read more in the Xero glossary entry on equity.
Once you start tracking income and money taken out, a fuller version of the equation gives you a more complete picture.
The expanded accounting equation
The expanded accounting equation breaks equity into its moving parts: Assets = Liabilities + Equity + Revenue - Expenses - Dividends. This shows how earning money, spending money, and paying out profits all change what the business is worth.
For an unincorporated business, owner's drawings replace dividends, since that's how an owner takes money out. The idea is the same: revenue lifts equity, while expenses and money withdrawn reduce it.
The equation isn't just a summary; it drives how each transaction gets recorded in the first place.
How the accounting equation connects to double-entry bookkeeping
Double-entry bookkeeping records every transaction in at least 2 accounts so the equation always stays balanced. Every entry has a matching one on the other side, which is the logic behind debits and credits.
Say you take out a $10,000 loan and deposit it in your bank account. Your cash (an asset) rises by $10,000 and your loan (a liability) rises by $10,000, so both sides of the equation move together and stay equal.
If the equation feels familiar, that's because you've probably already seen it laid out in a report.
How the accounting equation relates to the balance sheet
The balance sheet is the accounting equation presented as a report. It lists your assets on one side, and your liabilities plus equity on the other.
Because the two sides come from the same equation, a balance sheet only balances when assets equal liabilities plus equity. That's why it's called a balance sheet.
A simple set of numbers shows how the equation works in practice.
Accounting equation example
Imagine a business with $15,000 in equipment, $16,000 in inventory, $20,000 in cash, and $24,000 owed by customers. Add those together and total assets come to $75,000.
Now suppose the same business owes $37,000 in loans, $7,000 in taxes, and $6,000 in unpaid bills. That's $50,000 in total liabilities.
To find equity, subtract liabilities from assets: $75,000 - $50,000 = $25,000. So the business is worth $25,000 to its owners.
The result of that subtraction also tells you something important about the health of the business.
Solvency and the accounting equation
When assets are greater than liabilities, the business has positive equity and can cover what it owes. This is a sign of a solvent, healthy business.
A negative result means the business owes more than it owns, which makes it insolvent. Watching this figure alongside your net worth helps you spot trouble early.
Useful as it is, the equation can only tell you so much on its own.
Limitations of the accounting equation
The accounting equation reflects book value, based on the historical cost of your assets rather than what they'd sell for today. So it won't always match the current market value of your business.
It also doesn't measure performance. The equation shows what you own and owe at a point in time, but it says nothing about whether you're growing, profitable, or trading well.
For a small business owner, the real value of the equation is what it reveals about your day-to-day position.
Why the accounting equation matters for small businesses
The equation gives you a quick way to check your net worth and see whether your business owns more than it owes. That's a practical measure of financial health you can act on.
It also helps you make confident decisions, from taking on a loan to buying equipment, because you can see how each move affects both sides of your books.
Keeping your assets, liabilities, and equity accurate takes the guesswork out of running your numbers.
Track your numbers with confidence using Xero
Xero keeps your assets, liabilities, and equity up to date automatically, so your balance sheet stays balanced and your net worth is always clear. See how simple it can be and get one month free.
Here are answers to some frequently asked questions about the accounting equation.
FAQs on the accounting equation
Why is the accounting equation important?
It keeps your books accurate by making sure every transaction is recorded on both sides. It also gives you a fast read on your net worth and solvency.
What are the three elements of the accounting equation?
The 3 elements are assets, liabilities, and equity. Assets are what you own, liabilities are what you owe, and equity is what's left for the owners.
What is the expanded accounting equation?
It's Assets = Liabilities + Equity + Revenue - Expenses - Dividends. It breaks equity into the revenue, expenses, and payouts that change a business's value over time.
How does the accounting equation relate to the balance sheet?
The balance sheet is the equation shown as a report, with assets on one side and liabilities plus equity on the other. A balance sheet balances only when those two sides are equal.
Related terms
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Disclaimer
This glossary is for small business owners. The definitions are written with their requirements in mind. More detailed definitions can be found in accounting textbooks or from an accounting professional. Xero does not provide accounting, tax, business or legal advice.