Can assets or equity ever be negative?

Individual accounts can technically have negative balances, but total assets are rarely negative. However, total equity can become negative if a company has lost so much money that its liabilities exceed its assets.

What happens if the equation does not balance?

If the equation does not balance, an error was made in recording a transaction. In the real world, accounting software prevents this, but on an exam, you must go back and ensure every transaction has equal left-side and right-side effects.

Does this apply to non-profit organizations too?

Yes, though the terminology changes slightly. Instead of Equity, non-profits use the term Net Assets. The equation becomes $Assets = Liabilities + Net Assets$.

What is the accounting equation?

The accounting equation is the most fundamental concept in accounting. It states that everything a business owns must be paid for either by borrowing money or by taking money from investors. Think of it like buying a $10,000 car. If you take out a$ 6,000 loan from the bank, you must have paid $4,000 of your own money. The car is your asset, the loan is your liability, and your own money is the equity.

The Formula

The precise definition of the accounting equation is $Assets = Liabilities + Equity$ . Assets are resources the company owns, like cash, inventory, or equipment. Liabilities are obligations the company owes to others, such as bank loans or unpaid bills. Equity, also called shareholders' equity or owner's capital, represents the owner's remaining claim on the business after all debts are paid off.

Why it always balances

The equation works because of double-entry bookkeeping. This is a system where every single financial transaction affects at least two accounts to keep the equation in balance. If a company buys a new computer for cash, its equipment (an asset) increases, but its cash (another asset) decreases by the exact same amount. The total side of the Assets equation remains unchanged, keeping it perfectly balanced with Liabilities and Equity.

Where students slip up

A common mistake is forgetting how revenues and expenses fit into this equation. Revenues and expenses do not have their own separate categories in the basic equation. Instead, they flow directly into Equity. When a business makes a sale (revenue), Equity increases. When it pays rent (expense), Equity decreases. If your equation is out of balance on a homework problem, check if you accidentally left an expense out of the Equity section.

Worked through

A new landscaping business starts when the owner invests $5,000 of their own money into the company bank account. The business then borrows$ 2,000 from a bank. Finally, the business buys a $3,000 lawnmower using cash. What are the total Assets, Liabilities, and Equity of the business?

Let us track this step by step. First, the owner invests $5,000. Assets (Cash) =$ 5,000, and Equity = $5,000. Next, they borrow$ 2,000. Assets (Cash) increases to $7,000, and Liabilities (Loan) =$ 2,000. The equation is $7,000 =$ 2,000 + $5,000. Finally, they buy a$ 3,000 lawnmower with cash. Assets (Cash) drops by $3,000, but Assets (Equipment) goes up by$ 3,000. Total assets are still $7,000 (which is$ 4,000 cash plus $3,000 equipment). The final totals are Assets:$ 7,000, Liabilities: $2,000, Equity:$ 5,000. The equation $7,000 =$ 2,000 + $5,000 remains perfectly balanced.

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Where this comes from: OpenStax Principles of Financial Accounting · Khan Academy: Financial Accounting Unit 1