From Journal Entry to Ledger Account
A journal records transactions in date order. A ledger organizes those recorded amounts by account, so that all postings to Cash appear together, all postings to Accounts Payable appear together, and so on. Moving an amount from a journal entry into the account it affects is called posting. The purpose is not to create a new transaction or change its accounting treatment; it is to place the journal’s existing debit or credit in the corresponding account.
A T-account is a compact way to display one ledger account. The account name goes above a horizontal line, and a vertical line divides the account into a debit side on the left and a credit side on the right. Posting means transferring each journal line to the matching account and putting the amount on the same debit or credit side as in the journal. The normal-balance pattern and debit-credit rules determine which side an account uses; a posting does not reverse those rules.
A complete posting needs more than the amount. The date identifies when the transaction was recorded; the amount and side reproduce the journal line; and the posting reference links the ledger entry to its source journal entry. The particulars field often identifies the counterpart account or gives a brief description. The exact layout varies between accounting systems, but the goal is consistent: another reader should be able to trace the ledger item back to the journal.
| Journal line | Ledger destination | What must be preserved |
|---|---|---|
| Cash, debit $4,800 | Cash account, debit side | Date, $4,800, and journal reference |
| Equipment, credit $700 | Equipment account, credit side | Date, $700, and journal reference |
| Accounts Payable, credit $2,100 | Accounts Payable account, credit side | Date, $2,100, and journal reference |
The journal’s account order and the ledger’s account order serve different purposes. The journal lists the debit and credit lines of a transaction together. The ledger separates them into the accounts affected. For a compound journal entry, each account line is posted separately; do not combine lines merely because they share a debit or credit side.
A Consistent Posting Method
Use the same sequence for a simple entry and a compound entry. First identify each account line in the journal. Then locate the ledger account with the same name, copy the date and amount, and place the amount on the same side shown in the journal. Finally, add the source reference and counterpart information required by the ledger format. A posting reference may be a journal page number or an entry identifier such as J1.
Identify its account, date, amount, and whether the amount is a debit or credit. Do not infer the side from the transaction description alone; use the checked journal entry.
Use the same account name as the journal. Do not post an amount to a related but different account.
A journal debit goes to the ledger’s left side; a journal credit goes to its right side. Preserve the amount exactly.
Record the date and a reference to the source journal entry. Include the counterpart account or other particulars required by the ledger format.
Confirm that every journal line has one corresponding ledger posting, in the matching account, on the matching side, for the same amount.
Worked Postings
Worked Example: Posting a Two-Line Entry
On March 4, a hypothetical consulting firm receives $3,600 cash for services provided. The checked journal entry is J1: debit Cash $3,600; credit Service Revenue $3,600. Post both lines to the ledger. Use the date, counterpart account, and journal-entry identifier as the posting details.
Method. Treat each journal line as a separate instruction. The debit line belongs in Cash; the credit line belongs in Service Revenue. The entry identifier J1 provides the link back to the journal.
Cash account. The journal debits Cash $3,600 on March 4. Therefore, write $3,600 on the debit side of Cash. The counterpart is Service Revenue, and the source reference is J1.
| Cash — Debit | Cash — Credit |
|---|---|
| Mar. 4 | Service Revenue | J1 | $3,600 | — |
Service Revenue account. The journal credits Service Revenue $3,600 on March 4. Therefore, write $3,600 on the credit side of Service Revenue. Its counterpart is Cash, and its source reference is again J1.
| Service Revenue — Debit | Service Revenue — Credit |
|---|---|
| — | Mar. 4 | Cash | J1 | $3,600 |
Check. J1 contains two lines, and the ledger contains two matching postings: a $3,600 debit to Cash and a $3,600 credit to Service Revenue. Both ledger references point to J1. No balance is calculated here; the task is to transfer the journal lines faithfully.
Common mistake avoided: placing the Cash amount on its credit side because cash was received. Posting follows the journal’s debit or credit designation. Here, the journal debits Cash, so the ledger debit side is required.
Worked Example: Posting a Compound Entry
On April 12, a hypothetical design studio pays $1,250 cash for supplies and $450 cash for delivery equipment maintenance. Its checked compound entry is J2: debit Supplies Expense $1,250; debit Repairs Expense $450; credit Cash $1,700. Post all lines to the three affected accounts, including the counterpart information and source reference.
Method. Read each of the three journal lines independently. The two debit lines go to the debit sides of their named expense accounts. The credit line goes to the credit side of Cash. The cash credit must equal the sum of the two debits:
Supplies Expense. Post $1,250 to the debit side, dated April 12. The other account in the transaction is Cash, and the source entry is J2.
| Supplies Expense — Debit | Supplies Expense — Credit |
|---|---|
| Apr. 12 | Cash | J2 | $1,250 | — |
Repairs Expense. Post $450 to the debit side, dated April 12. Record Cash as the counterpart and J2 as the source.
| Repairs Expense — Debit | Repairs Expense — Credit |
|---|---|
| Apr. 12 | Cash | J2 | $450 | — |
Cash. The journal credits Cash $1,700. Post that amount to Cash’s credit side, not its debit side. The counterpart information can name both expense accounts because both are part of the compound entry; J2 identifies the complete source entry.
| Cash — Debit | Cash — Credit |
|---|---|
| — | Apr. 12 | Supplies Expense; Repairs Expense | J2 | $1,700 |
Check. All three journal lines have one corresponding ledger posting. The two debit postings total $1,700, matching the $1,700 credit posting. The lines remain separate in the two expense accounts; the fact that both are debits does not make them one account or one posting.
Common mistake avoided: combining the two expense debits into a single $1,700 Supplies Expense posting. That would preserve the total but misstate the individual account records. Post each named journal line to its own account.
Worked Example: Preserving the Reference in a Multi-Account Entry
On June 8, a hypothetical clinic purchases a diagnostic monitor costing $8,400. It pays $2,400 immediately and agrees to pay the remaining $6,000 later. The checked journal entry is J3: debit Medical Equipment $8,400; credit Cash $2,400; credit Accounts Payable $6,000. Show the ledger posting for each account, retaining a useful link to J3.
Method. This entry has one debit and two credits. Post the entire equipment debit to Medical Equipment. Split the credit postings exactly as recorded: the cash portion goes to Cash, and the unpaid portion goes to Accounts Payable. Do not post the full $8,400 to either credit account.
Medical Equipment. Debit the account $8,400 on June 8. Its counterparts are Cash and Accounts Payable, and its posting reference is J3.
| Medical Equipment — Debit | Medical Equipment — Credit |
|---|---|
| Jun. 8 | Cash; Accounts Payable | J3 | $8,400 | — |
Cash. Credit Cash $2,400 on June 8. The posting particulars can identify Medical Equipment as the related account, and J3 traces the posting to the journal.
| Cash — Debit | Cash — Credit |
|---|---|
| — | Jun. 8 | Medical Equipment | J3 | $2,400 |
Accounts Payable. Credit Accounts Payable $6,000 on June 8. Record Medical Equipment as the related account and J3 as the source.
| Accounts Payable — Debit | Accounts Payable — Credit |
|---|---|
| — | Jun. 8 | Medical Equipment | J3 | $6,000 |
Check. There are three journal lines and three ledger postings. The credit amounts reproduce the stated cash payment and unpaid balance, and together they equal the debit:
Each ledger line cites J3, so a reader can return to the source entry and verify the entire transaction. The cross-reference is especially useful when an entry has several account lines.
Common mistake avoided: posting $8,400 as a credit to Cash and also recording $6,000 in Accounts Payable. That would record $14,400 of credits. The journal says Cash is credited only $2,400; Accounts Payable receives the separate $6,000 credit.
Why Posting Preserves the Journal’s Double Entry
Posting reorganizes the journal; it does not alter the amounts or their debit-credit designations. This gives a simple reason that correctly posted ledger entries preserve the journal’s equality. For each journal entry, the total debit amount equals the total credit amount. Every debit line is transferred once to the debit side of its named ledger account, and every credit line is transferred once to the credit side of its named ledger account. Because neither the side nor the amount changes, the sum of the posted debit lines equals the sum of the posted credit lines.
The implication depends on accurate posting: each journal line must be transferred exactly once, to the correct account, on the correct side, and for the same amount. A missing line, duplicate line, wrong-side posting, or altered amount breaks the correspondence even if the journal entry itself was correct. This check concerns the posted lines; calculating account balances and preparing a trial balance are separate tasks.
Posting Records and Common Traps
A ledger is useful only when its entries remain understandable and verifiable. A journal reference such as J3 lets a reviewer locate the source entry. The date helps organize the account’s activity, while the counterpart-account information gives context without replacing the journal reference. In a manual system, the journal may also receive a ledger-account reference after posting, creating a two-way trail. In a computerized system, the software may maintain that link automatically.
- Do not reverse the journal side. A debit remains a debit when posted; a credit remains a credit. The ledger’s left and right positions simply display those sides.
- Do not change an amount to make it fit. Transfer the journal amount as written. If the journal appears incorrect, investigate or correct it through the appropriate accounting process rather than silently changing a ledger posting.
- Do not collapse compound-entry lines. Each account named in the journal receives its own posting, even when multiple lines share a side.
- Do not omit the reference. An amount without a usable source reference is harder to verify and less useful for an audit trail.
- Do not confuse posting with balancing. Posting transfers entries to accounts. Determining each account’s net balance is a distinct calculation.
Check Your Understanding
For each problem, identify the ledger account, side, amount, and source reference. Do not calculate account balances.
- A hypothetical repair shop’s entry J4, dated July 2, debits Cash $920 and credits Repair Revenue $920. State the two ledger postings, including counterpart account and reference. (Answer: Cash debit $920, counterpart Repair Revenue, J4; Repair Revenue credit $920, counterpart Cash, J4.)
- Entry J5, dated August 10, debits Office Supplies $380 and Utilities Expense $220, and credits Cash $600. List the posting for each account and verify the entry’s debit and credit totals. (Answer: Office Supplies debit $380; Utilities Expense debit $220; Cash credit $600; all dated August 10 and referenced to J5; debits and credits both total $600.)
- A hypothetical laboratory records entry J6 on September 3: debit Laboratory Equipment $5,700; credit Cash $1,700; credit Accounts Payable $4,000. A clerk proposes posting $5,700 to the Cash credit side and $4,000 to Accounts Payable. Identify the error and give the correct postings. (Answer: Cash is overstated by the proposed posting; post Equipment debit $5,700, Cash credit $1,700, and Accounts Payable credit $4,000, each with J6.)
- Entry J7, dated October 14, debits Prepaid Insurance $2,100 and Insurance Expense $300, and credits Cash $2,400. A ledger has one $2,400 debit posted to Prepaid Insurance and one $2,400 credit posted to Cash. Explain why it is not a faithful posting and state the corrected account lines. (Answer: It misstates Prepaid Insurance and omits Insurance Expense; post Prepaid Insurance debit $2,100, Insurance Expense debit $300, and Cash credit $2,400, all with J7.)
- A compound journal entry J8 has three lines: debit Equipment $9,600, credit Cash $3,100, and credit Notes Payable $6,500. The ledger’s Equipment posting says “Cash, J8” but does not mention Notes Payable. Is the amount and side sufficient for a traceable posting? State a correction that preserves the journal reference. (Answer: No. The Equipment debit is $9,600, but its particulars should identify both Cash and Notes Payable, or an equivalent reference to the full J8 entry; the Cash credit is $3,100 and Notes Payable credit is $6,500, each referenced to J8.)