AI Tutor
At the end of the month, your business might have dozens of separate entries in a single cash account. How do you find out exactly how much money you have left and verify that no bookkeeping numbers were entered incorrectly?
Before you can check your entire accounting system, you first have to close out and summarize each ledger account individually.

Balancing a T-Account

To find the net position of any ledger account (a record tracking increases and decreases for a specific item), we total the debit and credit sides to see which side is larger.
We insert a plug figure called the balance carried down (c/dc/d) on the smaller side so both columns match, draw single and double horizontal lines called ruling off, and restart the next period with the balance brought down (b/db/d) on the original heavier side.
A common mistake is thinking a balance carried down on the credit side means the account is in debt. In reality, c/dc/d is just a temporary placeholder to force equal totals; the true state is shown by b/db/d on the debit side.
Now that every individual account shows a single clear balance brought down, how do we test if our entire accounting system adds up?

Extracting the Trial Balance

A trial balance is an internal report listing the closing balances (b/db/d) of all general ledger accounts in two parallel columns: Debit and Credit.
Accounts with normal debit balances include assets (resources owned), expenses (costs incurred), and drawings, while accounts with normal credit balances include liabilities (amounts owed), income (revenue earned), and capital.
In 1494, Venetian mathematician Luca Pacioli formally documented this method, showing that because every single transaction records equal debits and credits, the final totals of all balances must match perfectly.