The post-closing trial balance: the last check of the year

The accounting cycle ends with three trial balances. The unadjusted trial balance comes straight from the ledger after the period's transactions are posted. The adjusted trial balance follows the adjusting entries. And the post-closing trial balance comes after the closing entries have been posted, when the books are ready to start the new year. It is the shortest of the three, and it answers one question: did closing leave the books in a clean, balanced state, with only the accounts that carry forward?

This page explains which accounts survive closing, how to work out the new balance of Owner's Capital, and how to prepare the post-closing trial balance from an adjusted trial balance, using numbers from the practice set.

Permanent and temporary accounts

Every account in the ledger is one of two kinds:

• Permanent (real) accounts carry their balances from one year to the next: assets, contra-assets such as Accumulated Depreciation, liabilities and Owner's Capital. Cash at the end of December is still there on January 1.
• Temporary (nominal) accounts measure one period only: revenues, expenses, contra-revenues such as Sales Returns and Allowances and Sales Discounts, and Owner's Drawing. At year end their balances are moved into Owner's Capital so that each starts the new year at zero. Income Summary, if used, is temporary too and is opened and closed during the closing process.

A post-closing trial balance lists permanent accounts only. If any revenue, expense or drawing account still has a balance, closing is not finished.

What closing does to Owner's Capital

Closing moves the year's results into capital. Revenues increase it, expenses decrease it, and the owner's drawings decrease it:

Capital after closing = Capital before closing + Net income − Drawing

(With a net loss, the loss is subtracted instead.) This is the same figure as the ending capital on the statement of owner's equity, provided the capital balance before closing already includes any investments made during the year. Every other permanent account is untouched by closing, so its balance on the post-closing trial balance is exactly its adjusted balance.

Worked example

Here is the adjusted ledger for one of the practice problems, Juniper Landscaping at December 31, 2025, before closing:

Step 1: net income

Revenues are $94,300.00. Expenses are $25,312.00 + $5,062.00 + $17,718.00 = $48,092.00. Net income is $94,300.00 − $48,092.00 = $46,208.00.

Step 2: capital after closing

$54,400.00 + $46,208.00 − $12,000.00 = $88,608.00.

Step 3: list the permanent accounts

Step 4: check it balances

Debits $91,908.00, credits $91,908.00. They agree, and they should: closing entries always balance, so if the adjusted trial balance balanced, the post-closing one must too. A quick cross-check is that the post-closing totals equal total assets on the balance sheet (net of accumulated depreciation, $90,908.00, plus the $1,000.00 of accumulated depreciation that sits on the credit side here).

The closing entries behind it

You do not have to write the closing entries to prepare the post-closing trial balance, but it helps to see where the numbers come from. With an Income Summary account, Juniper Landscaping's closing entries would be:

1. Debit Service Revenue $94,300.00; credit Income Summary $94,300.00.
2. Debit Income Summary $48,092.00; credit Wages Expense $25,312.00, Rent Expense $5,062.00 and Utilities Expense $17,718.00.
3. Debit Income Summary $46,208.00; credit Owner's Capital $46,208.00 (the net income).
4. Debit Owner's Capital $12,000.00; credit Owner's Drawing $12,000.00.

After posting them, every temporary account and Income Summary is at zero, and Owner's Capital has risen from $54,400.00 to $88,608.00. Our closing entries lesson practises the entries themselves.

Why bother with a post-closing trial balance?

It is a control. It confirms three things before the new year's entries begin:

• The ledger still balances after the closing entries were posted. A closing entry posted to the wrong side, or only half posted, shows up here.
• Every temporary account really is at zero. A forgotten expense account would carry last year's costs into this year's income statement.
• The opening balances for the new year are right. The post-closing trial balance is, in effect, the list of opening balances for January 1.

In accounting software the closing step often happens automatically, and many programs do not post visible closing entries at all. The idea still matters: the software's opening balances for the new year should agree with a post-closing trial balance you could prepare by hand, and a bookkeeper who understands it can spot when a year-end rollover has gone wrong.

Three trial balances compared

The adjusted trial balance is the one the financial statements are built from: the income statement from its revenue and expense lines, the statement of owner's equity from capital, drawing and net income, and the balance sheet from the rest. The post-closing trial balance should then agree with that balance sheet line for line, which makes it a useful final check that nothing was lost between the statements and the ledger.

When the year ends in a loss

The same method works when expenses exceed revenues; the loss simply reduces capital. Suppose a business has capital of $30,000.00 before closing, revenues of $41,000.00, expenses of $44,500.00 and drawings of $6,000.00. The net loss is $41,000.00 − $44,500.00 = −$3,500.00, so capital after closing is $30,000.00 − $3,500.00 − $6,000.00 = $20,500.00. On the post-closing trial balance, Owner's Capital appears as a $20,500.00 credit. If a run of losses and drawings ever pushed capital below zero, the account would show a debit balance, a signal worth raising with the owner.

Corporations: retained earnings instead of capital

A corporation follows the same pattern with different account names. Net income is closed into Retained Earnings rather than Owner's Capital, and Dividends plays the part of Owner's Drawing. Common Stock is a permanent account and is not affected by closing. So a corporation's post-closing trial balance lists assets, liabilities, Common Stock and Retained Earnings, with Retained Earnings updated by net income less dividends. The exercises here use a sole proprietorship, but once you can do one, the other is the same steps with new labels.

Common mistakes

1. Leaving Owner's Capital at its pre-closing balance. The capital account is the one permanent account that changes. Without the update, the trial balance will not balance.
2. Leaving Owner's Drawing open. Drawing is temporary. Updating capital for net income but not for drawing produces a trial balance that balances but is still wrong, which is why it is easy to miss.
3. Listing revenues and expenses. They are zero after closing.
4. Changing other permanent balances. Closing does not touch Cash, receivables, payables or equipment.
5. Treating Accumulated Depreciation as temporary. It is a contra-asset and carries forward; only Depreciation Expense closes.

How the practice works

Each exercise shows a generated ledger with every account's adjusted balance, with all accounts already listed in the form. Enter the post-closing balance for each account that has one, and leave the temporary accounts blank. Press Check and each line is compared with the post-closing trial balance computed from the same balances; the checker recognises the common mistakes above and explains them. The first exercise gives you net income and drawing; the later ones leave you to work out net income yourself.

A checklist before you press Check

• Have you left every revenue, expense and drawing account blank?
• Did you work out net income from the balances shown, revenues minus expenses?
• Is Owner's Capital equal to the old balance plus net income minus drawing?
• Are all the other balances exactly as they were before closing, on the same side?
• Do the debit and credit totals agree?