# Quarter End Bookkeeping Checklist for Client Books

- Author: AutoBankConvert (https://www.autobankconvert.com)
- Published: 2025-08-13
- Updated: 2025-08-13
- Category: Bookkeeping workflows
- Canonical: https://www.autobankconvert.com/blog/quarter-end-bookkeeping-checklist

> A quarter end bookkeeping checklist for client books: three months of statements balanced, review items cleared, estimates prepared and the quarter locked.
A quarter end bookkeeping checklist confirms four things for each client: every account has three balanced statements for the quarter, no line sits uncategorized or in review, the profit figures behind the quarterly tax estimate are ready, and the finished quarter is locked against later edits. Run it after the third month closes, never before.

## What does a quarter end bookkeeping checklist cover?

A quarter end bookkeeping checklist treats the three monthly closes as one block of time. Each month may have closed on its own, but the quarter asks a different question: do the three months still agree with each other and with the bank, after every late correction? It also adds quarterly work: estimate figures and a lock.

Most of the quarter's checks reuse what the month end already produced. The difference is that the quarter close looks backward across ninety days at once, and that view catches things no single month shows. A transfer recorded out of checking in February with no matching entry in savings until April is invisible in either month alone. Across the quarter it stands out as a clearing account that never returns to zero.

### The ten-item checklist

The table below is one way to lay out the checks. The notes are examples for a fictional client, not real figures.

| # | Check | Done when | Example note |
| --- | --- | --- | --- |
| 1 | Account list | Every bank, card and loan account active in the quarter is in the books | New payroll account opened in May, added |
| 2 | Statement count | Three statements per account, or the months it was open | Card: 3 of 3 |
| 3 | Balance chain | Each opening balance equals the prior closing balance | April opening matched March closing |
| 4 | Ledger ties to bank | Ledger balance on the last day equals the final statement | Checking agrees at 18,240.55 |
| 5 | Uncategorized at zero | Nothing left in the suspense or uncategorized account | 2 lines answered by client |
| 6 | Review queue empty | No line waiting for approval | Queue cleared Thursday |
| 7 | Transfers net out | Transfers between own accounts cancel to zero | Clearing account at 0.00 |
| 8 | Quarter totals pulled | Revenue, expenses and net profit for the quarter on one page | Net profit 21,400 example |
| 9 | Questions logged | Open items written down with an owner | 1 unknown deposit, client to confirm |
| 10 | Quarter locked | Closing date set to the last day of the quarter | Locked June 30 |

### Why the order is fixed

The checks run top to bottom because each one assumes the one above it is true. Pulling quarter totals before the review queue is empty produces a profit figure that will change. Locking before the questions are answered forces someone to unlock later, which defeats the lock. If a check fails, stop there and fix it before moving down the list.

## Three months of statements balanced before quarter end

Three balanced statements per account is the foundation of the quarter close. Balanced means each statement's opening balance plus its credits, minus its debits, equals its printed closing balance, and each month's opening balance equals the closing balance of the month before. If either test fails, the quarter is incomplete, whatever the reports say.

The quarter view makes one test possible that monthly closes skip: the chain test across all three months. Write the six numbers in a row for each account. Here is an example for one checking account, with made-up values.

| Statement | Opening | Closing | Chains to next? |
| --- | --- | --- | --- |
| April | 12,005.10 | 14,388.42 | Yes |
| May | 14,388.42 | 9,917.06 | No: June opens at 9,971.06 |
| June | 9,971.06 | 18,240.55 | End of quarter |

The break between May and June is 54.00. A gap like that usually means one of three things: a statement was replaced by the bank after you had it, the May file was a draft or partial download, or the numbers were keyed by hand and two digits swapped. Here 9,917 and 9,971 point at a transposition, so the first stop is the original May PDF.

### When a statement in the quarter is missing

A missing statement is a gap, and a gap means the quarter cannot close. Ask the client first, then the bank. If the quarter has to be reported before the statement arrives, close it as provisional and say so in writing. Clients that are months behind on statements need a different plan altogether; the guide to [catch up bookkeeping across months of statements](/blog/catch-up-bookkeeping-with-bank-statements) covers how to sequence that work.

### Where the quarter's first balance comes from

The first quarter for a new client has no prior closing balance in your own books to chain from. The starting figure has to be set deliberately and documented, which is the subject of [opening balances for new client books](/blog/opening-balances-for-new-client-books). Do that once, and every later quarter chains from your own numbers.

If the client's statements go through [AutoBankConvert](/), each statement is checked before it is marked done: opening balance plus transactions must equal the closing balance. That covers the inside of each month. The chain from month to month is still worth reading across yourself at quarter end.

## Quarter end review items to clear before the lock

Review items are every line or question that still needs a decision: uncategorized transactions, lines held in a review queue, unmatched transfers, and client questions without an answer. All of them must be resolved or written down before the quarter is locked, because a lock turns each open item into an edit to a closed period.

Work the items by type, not by date. Grouping them makes the client questions shorter and the fixes faster.

1. **Uncategorized lines.** Sort by vendor. One answer from the client often clears a dozen lines from the same payee.
2. **Review queue.** Approve or recode each held line. A line approved here should also teach the client's rules, so it does not come back next quarter.
3. **Transfers.** Every transfer out of one of the client's accounts should have a matching transfer in. Check the clearing account balance on the last day of the quarter.
4. **Unknown deposits.** Ask the client what each one was. Until they answer, park the amount in a clearly named suspense account rather than guessing at income.
5. **Owner items.** Personal charges paid from business accounts belong in a draw or similar equity account, not in expenses.

### Items that can stay open

Some questions will not be answered in time, and that is acceptable if the record says so. Write each one down with the amount, the date, what you think it is and who owes the answer. A short list like that is better than a quarter held open for a week. A client whose list keeps growing quarter after quarter may need a reset rather than more follow-up; the [bookkeeping cleanup checklist](/blog/bookkeeping-cleanup-checklist) is the place to start in that case.

## Which quarter end numbers does an estimated tax payment need?

A quarterly estimate starts from the year-to-date profit figure, so the bookkeeping job is to deliver a clean profit and loss statement through the last day of the quarter. Calculating the payment itself is the job of the client's tax preparer, unless your engagement says otherwise. Your numbers have to be final before theirs can be.

The IRS explains on its [estimated taxes page](https://www.irs.gov/businesses/small-businesses-self-employed/estimated-taxes) that the year is divided into four payment periods, each with its own due date. It also says individuals generally have to make estimated payments if they expect to owe $1,000 or more when they file, and corporations generally do if they expect to owe $500 or more. Those thresholds are the reason a quarter close matters even for small clients.

### The estimate package

Send the preparer, or the client if they do their own estimates, one short package:

- Profit and loss for the quarter and for the year to date.
- A note of anything unusual in the quarter, such as a large one-off sale or a big equipment purchase.
- Owner draws and contributions for the year to date, since they explain why cash and profit differ.
- The list of open questions, with amounts, so the preparer knows how firm the numbers are.

Do not round or estimate inside the package. If a figure is provisional because a statement is missing, mark it and give the size of the gap. The preparer can decide how much that uncertainty matters.

## Locking the quarter in the client's books

Locking the quarter means setting a closing date in the accounting system so that transactions dated on or before the last day of the quarter cannot be changed casually. A lock protects the numbers you just handed over. Without one, a client fixing a single expense in April can quietly move the profit figure the estimate was based on.

In QuickBooks Online, the setting is the closing date, together with an optional password. Intuit's help article on [editing closed books in QuickBooks](https://quickbooks.intuit.com/learn-support/en-us/help-articles/change-the-closing-date-password/00/239369) says only primary or company admins can change the closing date or its password. It also points to the Exceptions to Closing Date report, which shows changes made after the books were closed.

### Running the exceptions report

The exceptions report is worth opening at the start of every quarter close. It answers a simple question: did anyone change last quarter after it was locked? If the report shows edits, find out who made them and why before you begin the new quarter. A change to a locked period may be a legitimate correction, but it should never be a surprise to the bookkeeper.

### Who holds the password

Keep the closing password with the bookkeeper, not with every user on the file. When the client needs something changed in a locked quarter, they ask, you make the correction, and you note it in that client's file. That small bit of friction is what keeps quarter figures stable.

## Quarter end checks that slip when one month ran late

The checks most likely to slip at quarter end are the cross-month ones, and they slip when the third month closes late. With the estimate due and the last statement just in, the temptation is to post the month, glance at the reports and lock. That shortcut skips the chain test, the transfer clearing check and the exceptions report.

### A worked example

Here is a fictional client to show how the slip happens. A landscaping business has a checking account, a savings account and one business card. The June card statement arrives on July 12, eight days later than usual.

1. The bookkeeper converts and posts June checking and savings on July 3, as normal.
2. The June card statement arrives on July 12 and is posted the same day.
3. The card payment from checking on June 28 was already posted in checking. On the card side it appears on the July statement, because the card cycle closed on June 25.
4. The clearing account now holds the payment with nothing on the other side for the quarter. The quarter's profit is right, but the balance sheet shows an unexplained 2,300.00 in clearing.
5. If the quarter is locked on July 12 without the transfer check, that 2,300.00 sits in a closed period until someone notices it at year end.

The fix is short: before locking, look at the clearing account balance on the quarter's last day and explain every cent. In this example, the explanation is a timing note that the payment lands on the July card statement, and the July close will clear it.

### Keeping late months from breaking the routine

A late month does not need a new process. It needs the same ten checks done in the same order, a day later. If late statements happen every quarter, the cost of the extra pass belongs in the fee. The guide to [pricing bookkeeping services when automation does the entry](/blog/pricing-bookkeeping-services-with-automation) shows how to price close work by the hours it takes rather than by the number of transactions.

When the quarter is closed, the next one starts from its locked balances. If you want the next quarter's statements to arrive already converted and checked, you can [get started with AutoBankConvert](/get-started) and set a monthly schedule for each client.