3.5 Use Journal Entries to Record Transactions and Post to T-Accounts

Recording Transactions and Posting to T-Accounts

Recording transactions in journal entries and posting them to T-accounts are the core mechanics of double-entry accounting. Every transaction touches at least two accounts, and debits must always equal credits. Once you nail this process, everything else in the accounting cycle builds on it.

Format of Journal Entries

A journal entry is the first formal record of a transaction. Think of it as the accounting system's "receipt" for what happened. Each entry follows a standard format:

1. Date of the transaction goes at the top.
2. Debited account(s) are listed first, flush with the left margin.
3. Credited account(s) are listed next, indented slightly to the right.
4. Amounts go in two separate columns: debits on the left, credits on the right.
5. A brief description (sometimes called a memo or narration) goes below the accounts and amounts.

The entries themselves come from source documents like invoices, receipts, or bank statements. These documents provide the evidence that a transaction actually occurred.

Which accounts get debited and which get credited? The rules follow the account type:

• Debits increase: Assets (e.g., Cash) and Expenses (e.g., Rent Expense)
• Credits increase: Liabilities (e.g., Accounts Payable), Equity (e.g., Common Stock), and Revenue (e.g., Service Revenue)

The reverse is also true: debits decrease liabilities, equity, and revenue, while credits decrease assets and expenses.

Because this is a double-entry system, every journal entry must affect at least two accounts, and total debits must equal total credits. If they don't balance, something went wrong.

Posting to T-Accounts

A T-account is a simple visual tool shaped like the letter "T" that represents a single account in the ledger.

• The account name sits at the top (e.g., Cash).
• The left side is for debits.
• The right side is for credits.

Posting means transferring the information from your journal entries into the appropriate T-accounts. Here's the process:

1. Look at the first account in your journal entry and find its T-account.
2. If the journal entry debited that account, write the amount on the left side of the T-account.
3. If the journal entry credited that account, write the amount on the right side.
4. Repeat for every account in the entry.

After posting, the accounting equation ($Assets = Liabilities + Equity$) must still balance. If it doesn't, go back and check your postings.

All T-accounts together make up the general ledger, which is the complete collection of every account a company uses.

Calculation of Account Balances

Once transactions are posted, you need to figure out where each account stands. The steps are straightforward:

1. Add up all the debit entries on the left side of the T-account to get total debits.
2. Add up all the credit entries on the right side to get total credits.
3. Subtract the smaller total from the larger total. The result is the account balance, and it sits on whichever side was larger.

If total debits exceed total credits, the account has a debit balance. If total credits exceed total debits, it has a credit balance.

Normal balances tell you which side a balance should be on for each account type:

A quick way to remember: normal balance matches the side that increases the account.

The balance at the end of an accounting period is called the closing balance. That closing balance carries forward as the opening balance for the next period.

The Accounting Cycle and Financial Reporting

Journal entries and T-accounts are just the first few steps in a larger process called the accounting cycle. Here's where they fit:

• A chart of accounts lists every account the company uses, organized by category (assets, liabilities, equity, revenue, expenses). Each account typically has a number for easy reference.
• Transactions are recorded in journal entries first, then posted to T-accounts in the general ledger.
• After all posting is done, you prepare a trial balance, which lists every account and its balance in two columns (debits and credits). The two column totals should be equal. If they aren't, there's an error somewhere in your recording or posting.

The trial balance doesn't guarantee that transactions were recorded in the correct accounts, but it does confirm that the double-entry system is intact and total debits equal total credits.