Posting and trial balance

The journal lists events in time order, but a manager needs the closing cash balance or the amount due from a particular customer. Posting transfers journal amounts into a ledger: a separate account for each asset, liability, equity item, revenue, or expense. Posting creates no new economic event. It rearranges a transaction's two-sided effect into account balances. If the journal reference is lost during that move, agreeing totals may not reveal where a number came from. Carry the entry number, date, and source document identifier into each ledger line.

There is an important opening-balance detail. Opening tools of 700 and opening payable of 700 mean that the owner's 10,000 transfer was a separate deposit; the tools were not bought using that new transfer. If someone ignores the opening balances and debits tools expense for the 700 payment, the entry balances but leaves an existing obligation uncleared and inflates April expense. Obtain documented and balanced opening account balances before adding this month's entries. A specialist cannot treat a loose list of current movements as a complete ledger.

Introduce a deliberate posting error. The 2,000 customer receipt is correct in the journal, and the full 2,000 is posted to cash, but only 200 is posted to the credit side of receivables. Receivables appear as 2,800 instead of 1,000. Debits total 14,800 against credits of 13,000, a difference of 1,800. Do not plug that difference into a suspense account merely to make columns agree. Trace the receipt using its invoice reference; compare both sides of the journal with postings to cash and the customer's account. Correct the missing 1,800 on the customer account after recording what went wrong. Debits then return to 13,000. If the journal rather than posting were wrong, the correction point would differ. Diagnose before adjusting.

A balanced trial balance can still hide errors. Omit the entire 3,000 service entry and neither side appears; totals continue to match, but both revenue and receivables are incomplete. Post a 1,200 rent payment to repairs expense instead, and the columns also agree while the presentation is wrong. Compare invoice-number sequences and bank items with sampled journal entries, reconcile the customer's subledger to its control account, and investigate unusual balances. Arithmetic agreement catches inequality. Completeness and classification require other evidence. The word “balance” is no promise that the eventual statements are fairly stated.

A second worked case: the journal debits equipment 4,500 and credits payable 4,500 for a computer purchase. The ledger shows equipment of 4,500 but payable of only 450. The trial-balance difference is 4,050. Trace the journal reference. Adding the missing 4,050 credit to payables corrects posting if the invoice truly was 4,500 and no payment or discount intervened. But if the invoice was 450 and the journal had an extra zero on both sides, the journal would have balanced throughout; correct the original entry instead. A difference equal to 4,050 points to a possible location, not a proven cause.