Debits are always listed on the left-hand side of T accounts. They represent an increase in asset and expense accounts, or a decrease in liabilities.

Sometimes, the accounting process appears to be a mirror image of what logical thought says it should be. But there’s a root of logic to it that makes it more than just an algebraic equation. Remembering the following formula may help:

Assets = Liabilities + Owners’ Equity

Assets are goods owned by the company—real estate, inventory, and other items of value. Liabilities are obligations, generally owed to suppliers. Owners’ Equity is what belongs to the owners.

If the owners decided to sell all the assets and pay all the liabilities, what would remain belongs to them—their equity. The formula would then work as follows:

Assets – Liabilities = Owners’ Equity

from this simple equation we derive the basic method for recording all business transactions in terms of their effect on the various accounts.

It’s clear that owners’ equity is increased by amounts invested by the owners, and de creased by what they withdraw from the company. It’s also clear that if we order some materials, we’re increasing our assets and increasing our liabilities. Unfortunately, it’s not all that easy. However, you should understand the basic concept of T account diagrams and how they reflect business activity in terms of debits and credits while maintaining the balance of the assets = liabilities + equity equation.