🎓 Prepared by students from Boğaziçi University

What is a Trial Balance?

A trial balance is a bookkeeping report that lists every general ledger account and its ending balance, sorted into debit and credit columns. Accountants prepare it at the end of a period to confirm that total debits equal total credits before building financial statements.

Short answer

A trial balance is a list of all ledger account balances split into debit and credit columns; if total debits equal total credits, the books are arithmetically balanced.

Normal balance sides
Debit column (normal balances)
  • Assets
  • Expenses
  • Dividends/Drawings
  • Losses
Credit column (normal balances)
  • Liabilities
  • Equity/Capital
  • Revenue
  • Gains
01

Try it: interactive calculator

Difference (should be 0)
0$
= 45,000-45,000
02

Step-by-step worked examples

A company's ledger shows: Cash $12,000 (Dr), Accounts Receivable $8,000 (Dr), Accounts Payable $5,000 (Cr), Capital $15,000 (Cr). Does the trial balance balance?

Total debits = 12,000 + 8,000 = 20,000
Total credits = 5,000 + 15,000 = 20,000
Debits = Credits → the trial balance balances.

After posting, total debits are $84,500 and total credits are $82,300. What is the correction needed?

Difference = 84,500 − 82,300 = 2,200
Search for a $2,200 error (omitted or transposed entry)
Correct and re-total until both columns are equal.

A $1,000 credit sale was posted as a $100 debit to Accounts Receivable by mistake (a transposition). How does this affect the trial balance?

Correct debit should be $1,000, but only $100 was posted
Total debits are understated by $900
The trial balance will NOT balance until the $900 difference is found and fixed.
03

Flashcards

04

Quick quiz

Q1.What must be true for a trial balance to balance?

Correct answer: B. A trial balance checks that the sum of debit balances equals the sum of credit balances.

Q2.Which error will NOT be caught by a trial balance?

Correct answer: C. A transaction posted to the wrong account but with equal, correctly-sided debit and credit still balances — the trial balance can't detect this error of principle.

Q3.Where does Accounts Payable normally appear on a trial balance?

Correct answer: B. Liabilities carry a normal credit balance.

Q4.When is a trial balance typically prepared?

Correct answer: B. It's a routine end-of-period check before financial statements are drawn up.
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05

Common mistakes

Assuming a balanced trial balance means there are no errors.Correct: It only proves debits equal credits — errors of omission or wrong-account posting can still exist.

Putting a liability balance in the debit column.Correct: Liabilities carry normal credit balances; only put them in the credit column unless there's an unusual debit balance.

Ignoring the difference and forcing the totals to match with a 'plug' figure.Correct: Investigate and correct the actual error — never force-balance with a fake number.

Confusing a trial balance with a balance sheet.Correct: A trial balance is an internal working paper listing ALL accounts (including revenue/expenses); a balance sheet is a formal statement of only assets, liabilities, and equity.

06

FAQ

What is the formula for a trial balance?

There's no calculation formula — the rule is Total Debits = Total Credits. If they match, the ledger is arithmetically in balance.

What is a trial balance used for?

It verifies that debit and credit postings are equal before preparing adjusting entries and financial statements.

How do you calculate a trial balance?

List every ledger account's ending balance in the debit or credit column based on its normal balance, then sum each column.

What are examples of accounts in a trial balance?

Cash, Accounts Receivable, Accounts Payable, Capital, Revenue, and Expense accounts all appear, each in its normal-balance column.

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