A close is not a single act of filing the month away — it is a sequence you repeat every period. Each step depends on the one before it, which is why the order matters as much as the work. Done consistently, the month-end close turns a running ledger into a set of numbers you can actually rely on.
1 · Reconcile every account
Start by reconciling every bank and credit-card account to its statement, one month at a time, until the QuickBooks balance matches the outside record with a difference of exactly zero. Reconciliation is the spine of the close — nothing downstream is trustworthy until it is done.
In QuickBooks Online, open the gear menu and choose Reconcile (or go through Accounting → Reconcile); in QuickBooks Desktop the path is Banking → Reconcile. Pick the account, enter the statement's ending balance and ending date, then match each transaction in QuickBooks against the statement, ticking off what cleared. When the difference reads 0.00, the account is reconciled. Do this for every account with a statement — checking, savings, each credit card, and any line of credit or loan — not just the operating account, because an unreconciled card is just as capable of hiding a missing bill.
Before you reconcile, clear the bank feed: match downloaded transactions to what's already in QuickBooks and add the rest, so you are reconciling against a complete register rather than a half-entered one. Work the oldest unreconciled month first and move forward in order; skipping around is how outstanding items get double-counted. If an account won't come to zero, stop and find the cause — a duplicate, a transaction entered twice through the feed, a missing deposit, or an opening-balance error — rather than forcing the difference with a reconciliation adjustment, which only buries the problem in a suspense account. Intuit's official QuickBooks support documents the reconcile workflow for each product version.
2 · Review the P&L and balance sheet
With every account tied out, run the profit-and-loss and balance sheet for the period and read them the way the business actually ran — every unusual swing gets explained before you move on. Reconciliation proves the balances are complete; the review proves they are classified correctly.
Pull the Profit and Loss and Balance Sheet reports set to the close month and compare each against the prior month. Look for the tells of a miscategorized period: an expense line that jumped for no reason, income sitting in the wrong account, anything landing in Uncategorized Income or Uncategorized Expense, and negative balances where none should exist. On the balance sheet, confirm it balances, then read the equity section: Opening Balance Equity should be zero once a file is set up correctly, and a lingering balance there is a setup error worth resolving rather than ignoring.
Then check the working-capital accounts. Open the accounts-receivable and accounts-payable aging reports and confirm the amounts owed to and by the business are real and current — an invoice that was paid but still shows open, or a bill entered twice, distorts both the balance sheet and cash flow. This review is also where you catch the classic distortions: a stale undeposited-funds balance overstating revenue, personal charges booked to the business, or sales tax collected but not yet shown as a liability. Fix each of these here, in the register, before you move on to adjusting entries — an adjustment stacked on top of a misclassification only compounds it.
3 · Book accruals and adjusting entries
Book the adjusting entries that put revenue and expense in the correct period — accrued expenses, prepaid amortization, depreciation, and deferred revenue — so the month reflects what was actually earned and incurred rather than only what moved through the bank. This is the step that separates accrual-basis books from a cash log.
The accounting method the business uses determines how much of this you do. Accrual-basis books recognize revenue when it is earned and expenses when they are incurred, which almost always means monthly adjusting entries; strict cash-basis books need fewer, though most still record depreciation and correct timing errors at close. The IRS explains the two methods and the rules that govern switching between them in Publication 538, Accounting Periods and Methods.
A few adjustments recur almost every month. Prepaid expenses — a year of insurance paid up front — get amortized a slice at a time, moving one month's share from the prepaid asset to expense. Depreciation spreads the cost of equipment across its useful life. Accrued expenses record a cost incurred but not yet billed, so it lands in the month it belongs to. Deferred revenue holds money collected before the work is done as a liability until it is earned. In QuickBooks Online, record each through + New → Journal entry, dating it within the close month and writing a clear memo so the entry is self-explaining later. If an adjustment is uncertain — an estimate, an allocation, a judgment call — that is the point to confirm it with the CPA rather than guessing; the AICPA sets the professional standards CPAs work to when they review a close.
4 · Lock the period and hand off
Finish by closing the books: set a closing date — with a password — in QuickBooks so the reconciled, reviewed period can't be changed without a deliberate override, then deliver the statements and a short note of what you adjusted. A period nobody locked is a period that can quietly drift out of balance again.
In QuickBooks Online, go to the gear menu → Account and settings → Advanced → Accounting and switch on Close the books, entering the closing date and a password. From then on, QuickBooks warns anyone who tries to edit a transaction on or before that date — the correction is still possible, but never silent, which is exactly the property a closed period needs. Then hand off: save the reconciliation reports, the P&L, and the balance sheet, and write a brief note of every material adjustment so the owner or their CPA can follow what happened and why. That handoff is what makes the close auditable, and it is the same discipline behind our methodology and our ongoing monthly bookkeeping. When you want the whole sequence in a form you can tick off each month, work from the month-end close checklist.
Questions about the month-end close
What does it mean to close the books in QuickBooks?
Closing the books means setting a closing date — ideally with a password — after the month is reconciled and reviewed, so QuickBooks warns anyone who tries to change a transaction dated on or before it. The numbers can still be corrected if needed, but not silently, which is what makes a closed period trustworthy.
In what order should I run a month-end close?
Reconcile first, then review, then adjust, then lock. Categorizing or adjusting on top of unreconciled balances just moves the error around. Every account has to tie to its statement before the profit-and-loss and balance sheet are worth reading.
Do I need to book accruals every month?
It depends on the accounting method the business uses. Accrual-basis books need adjusting entries — accrued expenses, prepaid amortization, depreciation, deferred revenue — so each month reflects what was actually earned and incurred. Strict cash-basis books need far fewer, but most businesses still book depreciation and correct timing errors at close.
How long should a month-end close take?
It depends on transaction volume, how many accounts there are, and how clean the month was going in. A small business on top of its books can often close in a day or two once statements post; a backlog or a file that won't reconcile takes longer. Consistency month to month is what keeps it fast.