Accounting T chart: what a T account shows and why bookkeepers still draw them

An accounting T chart — usually called a T account — is a single ledger account drawn as the letter T: the account name across the top, debits down the left, credits down the right. That is the whole device. It survives because it makes one thing visible that accounting software deliberately hides: which two accounts a transaction touched, and in which direction.

This is not the same thing as a chart of accounts, which people often confuse it with because the names collide. The chart of accounts is the list of every account you keep. A T account is one of those accounts, drawn out so you can see its movements. You need the list to organise the books and the T to check a single entry.

Reading an accounting T chart

• Left side is debit, right side is credit, always, regardless of the account. There is no exception to memorise.
• Debit does not mean bad and credit does not mean good. They are directions, not judgements — the words are inherited from the bank statement, where the perspective is reversed.
• Assets and expenses increase on the left. Liabilities, equity and income increase on the right.
• Every transaction produces at least one entry on each side, across at least two accounts, and the totals match. That is what double entry means.
• The balance of an account is the difference between its two columns, written on the side with the larger total.

Working an example

1. You invoice a customer for 10 000. Debit accounts receivable 10 000 — an asset went up. Credit sales 10 000 — income went up. Two Ts, one on each side, balanced.
2. The customer pays. Debit bank 10 000, credit accounts receivable 10 000. The receivable T now has 10 000 on each side and a balance of zero, which is the point: the debt is settled, not deleted.
3. You buy a laptop for 15 000 on the company card. Debit equipment 15 000, credit credit-card liability 15 000. Nothing left the bank yet, and the T for the card shows what you owe.
4. You pay the card. Debit credit-card liability 15 000, credit bank 15 000. The liability T closes and the bank T falls.

If you can draw the two Ts for a transaction, you understand it. The habit is worth keeping even when the software posts entries for you, because the errors that survive software are conceptual — an expense booked as an asset, a customer payment booked as new income — and no amount of automation catches a transaction that balances perfectly while describing the wrong event.

Where the T chart still earns its keep

• Checking an unfamiliar transaction before you post it — deposits, refunds, part-payments, anything involving tax.
• Explaining to a non-accountant why revenue and cash are different numbers. Two Ts do this in thirty seconds where a paragraph fails.
• Untangling a mess. When a balance looks wrong, drawing the account out by hand is faster than clicking through a ledger view.
• Teaching. Every accountant learned this way, and the diagram is still the shortest route from confusion to understanding.

Some credits sit outside the ordinary ledger entirely. Research and development tax relief is claimed against qualifying activity rather than booked as a routine entry, and the records that support a claim are contemporaneous ones.

What the software does with it

Ettex Books keeps the ledger in the normal way — accounts, entries, balances, reports — and does not ask you to draw anything. What it does not do is pretend the underlying model is different: entries have two sides, and the account view shows both columns, so the T is there if you go looking for it. Invoices raised in Ettex Invoices land as receivables the same way the example above describes.

Two limits worth stating plainly. Ettex Books is not certified accounting software for every jurisdiction, and it does not file your returns — statutory filing goes through your accountant or the local filing system. And it will not tell you that a correctly balanced entry describes the wrong transaction. That judgement stays with a person, which is the whole argument for keeping the T account in your head.