Closing the Books: Temporary vs Permanent Accounts

Two Kinds of Account: Stopwatches and Odometers

You have just built an adjusted trial balance — every account trued up, debits equal to credits, the exact numbers the statements need. Before the books can welcome a new period, one last housekeeping job remains, and it rests on a distinction that has been quietly true all along: some accounts measure a single slice of time, and others carry a running total that never resets. The first kind are [[temporary-accounts|temporary accounts]]; the second are [[permanent-accounts|permanent accounts]]. Sorting your accounts into these two piles is the whole secret of closing.

A clean way to feel the difference: temporary accounts are stopwatches, permanent accounts are odometers. A stopwatch times one race and then you reset it to zero for the next; revenue, expense, and dividend accounts work this way, measuring only what happened in this one period. An odometer never resets — it shows total distance ever travelled; cash, equipment, loans, and the owners' stake work this way, carrying their balance forward as long as the business lives. The three temporary families are exactly the ones on the income statement plus dividends: every revenue, every expense, and the dividends (or owner drawings) account.

Why We Close, and the Holding Pen Called Income Summary

Closing does two things at once, and it helps to keep them separate in your mind. First, it resets every temporary account to zero, so next period starts on a clean stopwatch. Second, it moves this period's net result — the profit or loss buried across dozens of revenue and expense lines — into the permanent equity account where it belongs, retained earnings. Profit is, after all, an increase in the owners' stake; closing is the moment that increase is formally folded into equity rather than left scattered across temporary scoreboards.

Doing both jobs in one giant entry would be a mess of dozens of debits and credits. So accountants use a temporary scratch pad — the [[income-summary|Income Summary]] account — as a meeting point. Think of it as a holding pen used for one afternoon a year: you herd all the revenues into it, herd all the expenses into it, read off the net figure that settles inside, and then drive that single number on to retained earnings. Income Summary is itself temporary; by the end of closing it too must be empty. If any balance lingers in it, something went wrong.

The Four Closing Entries, Step by Step

The standard close is exactly four closing entries, always in the same order. Each one empties a category by recording the opposite of its normal balance — a revenue account carries a credit balance, so to zero it you debit it; an expense carries a debit balance, so to zero it you credit it. Watch how Income Summary fills up in the middle and then drains out: by the last entry, every temporary account, Income Summary included, reads zero.

1. Close revenue: debit each revenue account for its full balance, credit Income Summary for the total. Now every revenue reads zero and Income Summary holds a credit equal to total revenue.
2. Close expenses: credit each expense account for its balance, debit Income Summary for the total. Every expense now reads zero, and Income Summary's net balance is revenue minus expense — that is, net income (a credit) or net loss (a debit).
3. Close Income Summary to equity: if it holds a net credit (profit), debit Income Summary and credit Retained Earnings for that amount; a net loss reverses the directions. Income Summary now reads zero and the profit has landed in equity.
4. Close dividends (or owner drawings): credit the Dividends account for its balance and debit Retained Earnings. Dividends are not an expense and never touch Income Summary — they are a direct reduction of equity, closed straight to Retained Earnings.

Adjusted figures:  Revenue 90,000  Expenses 62,000  Dividends 5,000

1) Dr Revenue            90,000
      Cr Income Summary           90,000
2) Dr Income Summary     62,000
      Cr Expenses (each)          62,000
   -> Income Summary now = 28,000 credit (net income)
3) Dr Income Summary     28,000
      Cr Retained Earnings        28,000
4) Dr Retained Earnings   5,000
      Cr Dividends                 5,000

Retained Earnings change this period: +28,000 - 5,000 = +23,000

The Post-Closing Trial Balance: Proving the Reset

After the four entries are posted, you pause and prove the reset worked by drawing a post-closing trial balance — a list of every account balance taken after closing. It must pass two tests, not just one. First, like any trial balance, total debits must equal total credits. Second, and this is the new test, it should contain only permanent accounts: not a single revenue, expense, or dividend line should appear, because every one of them should now read zero. If a temporary account is still showing a balance, a closing entry was missed or mis-posted.

There is a satisfying symmetry to notice. The post-closing trial balance is, in effect, the balance sheet's columns laid flat: assets, liabilities, and the now-updated equity, and nothing else. Its retained earnings figure already includes this period's profit and is reduced by dividends — the very number that will open next period. In other words, the post-closing trial balance is the bridge between two periods: it is simultaneously the proof that this year's books are clean and the starting line that next year's first entry will build on.

Reversing Entries: An Optional Shortcut

Closing finishes the cycle, but many bookkeepers add one optional grace note on the first day of the new period: a reversing entry. It exists to make routine work easier, never to change any reported result. Recall an accrued expense from the previous guide: at 31 December you accrued 4,000 of wages your staff had earned but would be paid in January. That accrual correctly put the cost in December. The awkwardness comes next month, when the full two-week payroll of, say, 10,000 is paid and the bookkeeper must remember to split it — 4,000 against Wages Payable, 6,000 against this year's Wages Expense.

A reversing entry sidesteps that. On 1 January you simply reverse the accrual — debit Wages Payable 4,000, credit Wages Expense 4,000. This briefly leaves a strange negative balance in Wages Expense, which is fine, because when the full 10,000 payroll is paid you can record it the easy, thoughtless way: debit Wages Expense 10,000, credit Cash. The 4,000 that already belonged to last year is cancelled by the reversal's credit, leaving exactly 6,000 of expense in the new year. Same result, far less remembering.