A T-account is a T-shaped sketch of a single ledger account: the account name sits on the top bar, debits go on the left of the vertical line, and credits go on the right. Bookkeepers use it to collect every increase and decrease that hits one account — Cash, Rent Expense, Accounts Payable — so the running balance can be read at a glance. It is not a special kind of account; it is simply the quickest way to draw what the general ledger already stores.
The shape exists because of double-entry bookkeeping. Every transaction changes at least two accounts — buy a laptop with cash and both Equipment and Cash move — and the ledger records each change in the account it belongs to. A T-account isolates one account from that tangle. Instead of scanning a whole journal for every line that mentions Cash, you see all of Cash's activity in one place, sorted into the only two things that can happen to it: entries on the left and entries on the right.
Accounting software builds these ledgers automatically now, but the hand-drawn T survives in every classroom for a good reason. When you are working out a journal entry, sketching the T-accounts first shows you whether your entry balances before you commit it.
The two sides of the T have fixed names. The left side is always the debit side and the right side is always the credit side, for every account, in every company. Debit and credit are not synonyms for increase and decrease, and they are not synonyms for good and bad. In a ledger they mean exactly one thing each: left and right.
Whether the left or the right side makes an account grow depends on what type of account it is. This is the normal balance rule:
The pattern comes straight from the accounting equation, assets = liabilities + equity. Assets sit on the left of the equals sign, so they grow on the left side of their T-accounts. Liabilities and equity sit on the right, so they grow on the right. Revenue increases equity, so it grows the way equity does, with credits. Expenses reduce equity, so they grow on the opposite side, with debits.
One more rule holds the system together: every transaction posts at least one debit and at least one credit, and total debits must equal total credits. That equality is what makes double-entry self-checking. If the debits and credits of an entry do not match, the entry is wrong before you have even posted it.
Posting is mechanical once the journal entry is written. Four steps:
Here is a full month. Maya starts a tutoring business in June and records five transactions.
| Date | What happened | Debit | Credit |
|---|---|---|---|
| Jun 1 | Maya invests savings in the business | Cash 9,500 | Owner's Capital 9,500 |
| Jun 3 | Buys a used laptop for cash | Equipment 1,240 | Cash 1,240 |
| Jun 10 | Earns tutoring fees, paid in cash | Cash 860 | Service Revenue 860 |
| Jun 18 | Pays June rent | Rent Expense 675 | Cash 675 |
| Jun 24 | Tutors a client who will pay in July | Accounts Receivable 430 | Service Revenue 430 |
Four of those five entries touch Cash. Pull just the Cash amounts into a T-account — left column for debits, right column for credits — and keep a running balance as you go.
| Date | Debit (left) | Credit (right) | Running balance |
|---|---|---|---|
| Jun 1 | 9,500 | — | 9,500 Dr |
| Jun 3 | — | 1,240 | 8,260 Dr |
| Jun 10 | 860 | — | 9,120 Dr |
| Jun 18 | — | 675 | 8,445 Dr |
| Totals | 10,360 | 1,915 | 8,445 Dr |
Watch what the running balance does: each debit adds and each credit subtracts, because Cash is an asset and assets grow on the debit side. For a credit-normal account the arithmetic flips. Service Revenue collected two credits in June and no debits.
| Date | Debit (left) | Credit (right) | Running balance |
|---|---|---|---|
| Jun 10 | — | 860 | 860 Cr |
| Jun 24 | — | 430 | 1,290 Cr |
Post the remaining accounts the same way and the system checks itself. Equipment holds a 1,240 debit balance, Accounts Receivable 430, and Rent Expense 675. Add every debit balance: 8,445 + 1,240 + 430 + 675 = 10,790. Add every credit balance: Owner's Capital 9,500 plus Service Revenue 1,290 = 10,790. The two totals match, which is exactly what a trial balance verifies at month end. If they did not match, at least one posting went to the wrong account or the wrong side.
The confusion usually starts with a bank statement. Your bank credits your account when money arrives, so credit feels like the increase word. But the statement is written from the bank's books, not yours: your deposit is money the bank owes you, a liability on their ledger, and liabilities grow with credits. In your own books, receiving cash is a debit to Cash. Drop the everyday meanings entirely. In a ledger, debit is left and credit is right, and neither one is good or bad.
Memorizing six account types times two directions falls apart under exam pressure. Anchor it to the accounting equation instead. Assets sit left of the equals sign and grow on the left (debit) side; liabilities and equity sit right and grow on the right (credit) side. Then route the income statement accounts through equity: revenue makes equity bigger, so it behaves like equity and grows with credits, while expenses eat into equity, so they grow on the opposite side, with debits.
When balancing a T-account, the classic slip is writing the ending balance on the smaller side, or subtracting the sides in the wrong order. Foot both columns first. The balance is the larger footing minus the smaller, and it belongs on the larger side. Maya's Cash foots at 10,360 of debits against 1,915 of credits, so the 8,445 balance is a debit. If your Cash T-account ever shows a credit balance, pause — either the account is genuinely overdrawn, or, far more often, a posting landed on the wrong side.
A T-account is a picture of one ledger account with debits on the left and credits on the right — always. Whether a debit grows the balance depends on the account type: assets and expenses carry debit balances; liabilities, equity, and revenue carry credit balances. Foot both sides and put the difference on the larger side.
It is a T-shaped sketch of one general ledger account. The account name goes on the top bar, debit entries go on the left of the vertical line, and credit entries go on the right. It shows all of one account's activity and its balance in a single view.
The left side, in every account and every company. The right side is always the credit side. Whether the left side increases the balance depends on the account type — it does for assets and expenses, but liabilities, equity, and revenue increase on the right.
Total each side separately (accountants call this footing), then subtract the smaller total from the larger. The difference is the balance, and it sits on the larger side. A Cash account with 10,360 of debits and 1,915 of credits has a debit balance of 8,445.
Write the journal entry first, then copy each half into the matching account: the debited amount on the left side of that account's T, the credited amount on the right side of the other account's T. Repeat for every transaction, then total each side and put the difference on the larger side. That difference is the ending balance.
They hold the same information. A ledger account is the formal record — in software, a table of postings. A T-account is the informal hand-drawn version of that record, used for teaching, exam work, and planning entries before you post them.
A journal entry names the accounts and amounts for one transaction; posting copies each half of that entry into the T-account it belongs to. An entry that debits Equipment 1,240 and credits Cash 1,240 becomes a left-side line in Equipment's T and a right-side line in Cash's T.
By the FinanceBrain Team · Last verified July 10, 2026 · How we produce and verify articles