To close an Income Summary account, you post one journal entry that moves its balance into a permanent equity account. If Income Summary carries a credit balance (net income), debit Income Summary and credit Retained Earnings or Owner’s Capital for the full amount. If it carries a debit balance (net loss), reverse the direction: credit Income Summary and debit the equity account. That single entry zeroes out Income Summary and updates equity for the period’s result. It only works, though, if you’ve already run revenue and expenses through Income Summary first, so the sequence matters.
Start From an Adjusted Trial Balance
Closing entries build on a completed adjusted trial balance. That report reflects every adjusting entry for the period: accrued expenses, prepaid allocations, depreciation, and anything else recorded to bring balances to their period-end amounts. If those adjustments aren’t finalized, revenue and expense totals will be off, and every closing entry inherits the error.
Before touching a single closing entry, pull two figures directly from the adjusted trial balance: the total of all credit balances in revenue accounts, and the total of all debit balances in expense accounts. If you run subsidiary ledgers for receivables, payables, payroll, or fixed assets, reconcile each one to its general ledger control account first. A mismatch there usually points to a missed posting that will distort the close.
Close Revenue Into Income Summary
Revenue accounts normally carry credit balances. To zero them, debit each revenue account for its full balance and post a single offsetting credit to Income Summary for the combined total. Three revenue accounts of $50,000, $12,000, and $3,000 produce an entry that debits each account individually and credits Income Summary for $65,000. After posting, every revenue account reads zero, and Income Summary holds the period’s total revenue as a credit.
Date the entry on the last day of the accounting period. Use a description that will still make sense a year from now, along the lines of “Close revenue accounts to Income Summary for FY 2025.” Vague labels create rework later.
Close Expenses Into Income Summary
Expense accounts run the other direction. They carry debit balances, so you credit each one for its full amount and post the combined total as a debit to Income Summary. If expenses total $56,000, Income Summary receives a $56,000 debit alongside the $65,000 credit from revenue.
At this point Income Summary’s balance equals total revenue minus total expenses. In the example, that’s a $9,000 credit balance, which is net income. If expenses had exceeded revenue, you’d see a debit balance instead, representing a net loss. Whatever the number, it should match the bottom line on your income statement exactly. If it doesn’t, stop and trace the discrepancy before posting anything else.
Close Income Summary to Equity
This is the entry the whole process is named after, and where Income Summary gets zeroed out for good. The direction depends on whether the period produced a profit or a loss.
When the Period Shows Net Income
A credit balance in Income Summary means the business earned more than it spent. Debit Income Summary for the full amount of that credit balance and credit your equity account. For a corporation, that’s Retained Earnings. For a sole proprietorship, it’s the Owner’s Capital account, often labeled with the owner’s name. Partnerships work the same way as sole proprietorships, except net income is split across each partner’s capital account according to the partnership agreement.
Continuing the example: debit Income Summary $9,000, credit Retained Earnings $9,000. Income Summary now reads zero. Retained Earnings has increased by the period’s profit.
When the Period Shows a Net Loss
A debit balance in Income Summary means expenses outpaced revenue. The entry flips. Credit Income Summary for the full debit balance to bring it to zero, and debit the equity account for the same amount. This reduces Retained Earnings (or Owner’s Capital), reflecting the fact that the business lost money during the period. The mechanics are identical; only the direction changes.
Don’t Skip Dividends or Owner Withdrawals
Dividends (in a corporation) and owner withdrawals (in a sole proprietorship or partnership) are temporary accounts that also need to reach zero before the new period starts, but they don’t flow through Income Summary. They aren’t income statement items; they’re distributions of equity.
The entry is straightforward. Debit Retained Earnings (or Owner’s Capital) and credit the Dividends or Withdrawals account for the full amount distributed during the period. A corporation that paid $2,000 in dividends debits Retained Earnings $2,000 and credits Dividends $2,000. Income Summary plays no role in this step, but the step still has to happen for the books to close cleanly.
Verify With a Post-Closing Trial Balance
After posting every closing entry, run a post-closing trial balance. This report should contain only permanent accounts: assets, liabilities, and equity. If any revenue account, expense account, dividend account, or Income Summary itself shows a balance, something went wrong in the sequence.
Check two things. Total debits must equal total credits, which confirms the ledger is still in balance. And the Retained Earnings or Owner’s Capital balance should equal the opening balance plus net income (or minus net loss) minus any dividends or withdrawals. If those numbers tie out, the books are ready for the new period.
A revenue account that wasn’t fully closed will carry a phantom balance into the next period and inflate next year’s income. A dividend account left open will misstate equity. Two minutes reviewing the post-closing trial balance prevents hours of untangling later.
What if Your Software Doesn’t Use Income Summary?
Not every business uses an Income Summary account. The direct closing method skips it entirely and closes revenue and expense accounts straight into Retained Earnings or Owner’s Capital. You debit each revenue account and credit Retained Earnings, then credit each expense account and debit Retained Earnings. The ending balance sheet is identical.
The tradeoff is the audit trail. Routing everything through Income Summary produces a single intermediate balance that should match the income statement’s bottom line, giving you a built-in check. The direct method saves a step but removes that checkpoint. Most accounting software defaults to the direct method and handles reconciliation internally, which is why an Income Summary account may not appear anywhere in the chart of accounts. The Income Summary approach shows up more often in manual bookkeeping and in accounting coursework, where the intermediate balance is part of what’s being taught.