Closing the books in accounting is the end-of-period procedure that finalizes a company’s financial records by resetting every revenue, expense, and distribution account to zero and moving the net result into permanent equity. The reset is what makes each period measurable on its own. Without it, this year’s sales would pile on top of last year’s, and no one could tell how the business actually performed during any single stretch of time. The final numbers feed the financial statements that owners, lenders, investors, and tax authorities rely on.
Closing can happen monthly, quarterly, or annually. The mechanics are the same at every interval; what changes is how thoroughly the numbers get reviewed before the period is locked.
Which Accounts Close and Which Don’t
Every account in the general ledger is either temporary or permanent, and the closing process only touches one of those groups.
Temporary accounts track a single period’s activity. Revenues, expenses, and the dividends or owner’s draw account all fall here. Think of them as counters: a sales revenue account tallies only the current year’s income, and at year-end that counter needs to go back to zero so it can start fresh.
Permanent accounts carry their balances forward indefinitely. Assets, liabilities, and equity accounts stay where they are. Your cash balance and outstanding loans roll straight into the new period. Retained earnings, where profits accumulate over time, is permanent too. Closing is essentially the bridge that moves temporary account results into permanent equity, where they become part of the company’s cumulative financial history.
Post Adjusting Entries First
Before any closing entry hits the ledger, adjusting entries have to be recorded. This is the step people skip or rush, and it’s where most period-end errors start. Adjusting entries put revenues and expenses in the correct period under accrual accounting, regardless of when cash actually moved.
The common ones cover:
- Accrued revenues — income earned but not yet billed, like services performed in December that won’t be invoiced until January.
- Accrued expenses — costs incurred but not yet paid, like the last week of December’s wages that get paid in January.
- Deferred revenues — cash collected in advance for services not yet delivered, which needs to be moved out of revenue and into a liability account until earned.
- Deferred expenses — prepaid costs like insurance, where only the portion used during the period belongs in expenses.
- Depreciation — allocating a portion of an asset’s cost to the current period based on its useful life.
Once the adjusting entries are posted and the adjusted trial balance confirms debits equal credits, the accounts are ready to close. Close before adjusting and every downstream figure — net income, retained earnings, the balance sheet itself — will be wrong.
The Four Closing Entries
Closing uses four journal entries to sweep every temporary balance into permanent equity. Most companies route everything through an intermediate account called Income Summary, which acts as a holding tank for the period’s profit or loss before the final transfer.
Step 1: Close the Revenue Accounts
Revenue accounts normally carry credit balances. To zero them out, debit each revenue account for its full balance and post one combined credit to Income Summary. Every revenue account now reads zero, and Income Summary holds the period’s total revenue as a credit.
Step 2: Close the Expense Accounts
Expense accounts carry debit balances. Credit each expense account for its full balance and post one combined debit to Income Summary. Income Summary now reflects total revenue minus total expenses — the period’s net income or net loss.
Step 3: Close Income Summary to Equity
The Income Summary balance now transfers to a permanent equity account. For a corporation, that’s Retained Earnings. For a sole proprietorship or partnership, it’s Owner’s Capital. If Income Summary shows a credit balance (net income), you debit Income Summary and credit Retained Earnings. If it shows a debit balance (net loss), the entry reverses: credit Income Summary, debit Retained Earnings. Either way, Income Summary goes to zero and the period’s result becomes part of permanent equity.
Step 4: Close Dividends or Owner’s Draw
The final entry handles distributions to owners. Dividends (for corporations) and owner’s draws (for other entities) carry debit balances because they reduce equity. Credit the Dividends or Draw account for its full balance and debit Retained Earnings or Owner’s Capital. After this step, every temporary account reads zero, and the entire period’s activity is reflected in the permanent equity balance.
Run a Post-Closing Trial Balance
After all four closing entries are posted, run one final check: the post-closing trial balance. It’s a list of every account and its balance immediately after closing, and it does two jobs. It confirms total debits still equal total credits, and it verifies that only permanent accounts carry balances. If any revenue, expense, or draw account still shows a number, a closing entry was misposted and needs correcting before the new period begins.
Skipping this check is a gamble that rarely pays off. A misposted closing entry throws off beginning retained earnings for the next period, which cascades through every financial statement produced afterward. Catching the error months later means complex correcting entries and, for companies subject to audit, potential restatement.
Reconcile to Outside Records Before Locking
The post-closing trial balance only confirms internal consistency — that debits match credits. It can’t catch errors hiding in accounts that were never compared to external records. Before treating the books as truly closed, every significant balance sheet account should be reconciled against independent sources: bank statements, loan statements, accounts receivable confirmations, and inventory counts.
Bank accounts are where errors most commonly hide. An unrecorded bank fee, a deposit in transit, or an outstanding check can all throw off cash. Discovering these discrepancies after the period is closed forces reopening entries or adjustments that complicate the next period’s records.
Hard Close vs. Soft Close
Companies choose between two approaches to locking their books, and the choice reflects how much flexibility they want after the period ends.
A hard close permanently locks the period. No one can post transactions back to it, and the only way to undo the lock is typically to restore from a backup. The advantage is certainty: the numbers are final, the statements are locked, and no one accidentally books a transaction to the wrong period. Public companies that file with the SEC generally hard-close once their filings are submitted.
A soft close restricts posting but leaves the door open for corrections. Financial statements still show the correct balances because the system performs a virtual close each time reports run, and the period can be reopened if a material error surfaces. Many private companies use soft closes for monthly periods and hard-close only at year-end after the audit is complete.
The distinction shapes how rigid your close timeline needs to be. A hard close demands that every adjustment, reconciliation, and review happen before the lock date. A soft close gives the team breathing room, but it introduces the risk that “temporary” adjustments become a permanent habit of sloppy period-end discipline.
Reversing Entries at the Start of the Next Period
Some accountants record reversing entries on the first day of the new period. These are mirror images of certain adjusting entries from the prior period, and they exist purely to simplify routine bookkeeping.
Say you accrued $2,000 in wages payable at year-end. Without a reversing entry, when you process the January payroll you’d have to split the payment between Wages Payable (the accrued portion) and Wages Expense (the new portion). With a reversing entry, you flip the accrual on January 1 and then record the full payroll payment as a single, straightforward entry to Wages Expense. It reduces the chance of double-counting an expense and lets payroll run normally without requiring someone to remember which portion was accrued.
Reversing entries are entirely optional. They don’t change any financial result. They just make the next period’s transactions cleaner, particularly for companies handling high volumes of accruals.
How Nonprofits Close Differently
The mechanics of closing are identical for nonprofits — revenues and expenses still get zeroed out through closing entries — but the destination account is different. Instead of transferring the period’s surplus or deficit to retained earnings, nonprofits close to a net assets account. Nonprofits don’t have owners or shareholders, so there are no earnings to retain. The net assets account does the same cumulative tracking, showing the organization’s total financial position after every period’s results have been folded in. Fund balances get updated through this process, so restricted and unrestricted net assets accurately reflect current activity.