The Monthly Close Checklist Every Bookkeeping Firm Needs

Ask ten bookkeepers at the same firm how they close a client's books for the month, and you will get ten different answers. One starts with bank reconciliation. Another starts with transaction review. A third starts with whatever document happened to arrive first in their inbox. The work gets done, but inconsistently — and inconsistency is where errors hide.

A standardized month-end close checklist solves this. It ensures that every client's books go through the same process, in the same order, with the same quality checks, regardless of which bookkeeper handles the work. Here is a checklist that scales from a handful of clients to a hundred.

Phase 1: Document Collection (Days 1-5)

Nothing in the close process can begin until you have the source documents. The sooner you collect them, the sooner your bookkeepers can start working — and the more time you have to resolve any issues before your delivery deadline.

1. Verify bank feed connections. Check that all bank and credit card feeds are active and current. If any feeds disconnected during the month, notify the client immediately to re-authorize.
2. Send document request. Email the client requesting any documents not captured by bank feeds: merchant processor statements, payroll reports, loan statements, petty cash logs, and any receipts for transactions that need clarification.
3. Confirm receipt of all expected documents. Check off each item as it arrives. Send a follow-up on day 3-4 for any outstanding items.
4. Escalate if needed. If critical documents are still missing by day 5, escalate to the firm owner or engagement manager. Document the delay in the client file.

Phase 2: Transaction Processing (Days 3-8)

Once documents are in hand, the core bookkeeping work begins. This phase is where your bookkeepers spend most of their time.

1. Categorize all bank transactions. Review and categorize every transaction that came through bank feeds. Use rules and memorized transactions where possible to speed up the process, but manually review anything the system could not match with confidence.
2. Process credit card transactions. Categorize credit card charges. Match receipts to transactions where applicable. Flag any personal charges that need to be coded to owner's draw or shareholder loan.
3. Enter manual transactions. Record any transactions not captured by bank feeds: cash transactions, barter transactions, manual checks, and journal entries for non-cash items.
4. Process payroll entries. Import or manually enter payroll journal entries from the client's payroll provider (Gusto, ADP, Paychex, etc.). Verify that gross wages, employer taxes, benefits, and net pay match the payroll report.
5. Record loan payments. Allocate loan payments between principal and interest based on the amortization schedule. Update the loan balance.
6. Enter depreciation. Record monthly depreciation entries for fixed assets. If the client acquired or disposed of assets during the month, update the fixed asset schedule accordingly.
7. Process prepaid expenses. Amortize prepaid insurance, prepaid rent, and any other prepaid items. Verify the amortization schedule is current.

Phase 3: Reconciliation (Days 6-10)

Reconciliation is the quality gate of bookkeeping. Every balance sheet account should reconcile to a supporting document or schedule.

1. Reconcile all bank accounts. Match every transaction in the accounting system to the bank statement. Investigate and resolve any unmatched items. The reconciled balance must match the bank statement ending balance to the penny.
2. Reconcile credit card accounts. Same process as bank accounts. Match to the credit card statement and resolve discrepancies.
3. Review accounts receivable. If the client invoices customers, review the AR aging. Follow up on significantly overdue invoices. Write off any confirmed uncollectible amounts with client approval.
4. Review accounts payable. Confirm that any bills entered during the month match actual obligations. Verify that payments made during the month cleared the appropriate AP balance.
5. Reconcile payroll liabilities. Confirm that payroll tax liabilities match the payroll provider's reports. Verify that any tax deposits or payments were recorded correctly.
6. Reconcile sales tax. If applicable, verify that sales tax collected matches the sales tax liability account. Prepare or verify the sales tax return data.
7. Review loan balances. Confirm that loan balances in the accounting system match the lender statements.

Firms that reconcile every balance sheet account monthly catch 85% of errors before they compound into larger problems. Firms that skip reconciliation on "low activity" accounts are the ones that discover a $15,000 discrepancy during tax season.

Phase 4: Review and Quality Check (Days 8-10)

Before generating financial statements, run a systematic quality check. This catches errors that individual reconciliation steps might miss.

1. Run a trial balance. Verify that debits equal credits. Any imbalance indicates a posting error that must be found and corrected.
2. Compare to prior month. Review the P&L and balance sheet side-by-side with the prior month. Investigate any line item that changed by more than 20% or by more than a material dollar amount. Most large variances have legitimate explanations, but the ones that do not are where errors live.
3. Check for common errors. Look for negative balances in asset accounts, positive balances in liability accounts that should be negative, revenue accounts with debit balances, and expense accounts with unusual credit balances.
4. Verify intercompany balances. If the client has multiple entities, confirm that intercompany accounts net to zero.
5. Review uncleared transactions. Check for old uncleared checks or deposits. Anything uncleared for more than 90 days should be investigated.
6. Reviewer sign-off. A second set of eyes — ideally a senior bookkeeper or the firm owner — reviews the financials before delivery. This is the most important quality control step and should never be skipped, even when time is tight.

Phase 5: Financial Statement Preparation and Delivery (Days 10-12)

1. Generate financial statements. Produce the Profit and Loss statement and Balance Sheet at minimum. Depending on the engagement, you may also prepare a cash flow statement, budget vs. actual comparison, or custom management reports.
2. Write the commentary email. Do not just attach the financial statements and hit send. Write a brief commentary that highlights key items: revenue trend, notable expenses, cash position, and anything the client should be aware of. This takes five minutes and dramatically increases the perceived value of your service.
3. Deliver to client. Send the financial statements and commentary on schedule. Consistency matters — if you promise delivery by the 12th, deliver by the 12th every month.
4. Mark the period as closed. Lock the period in QBO or Xero to prevent accidental changes. Note the close date in your tracking system.

Adapting the Checklist

Not every client needs every step. A sole proprietor with one bank account and no payroll does not need a payroll entry step or an intercompany reconciliation. A property management company with fifty bank accounts needs a much more detailed reconciliation phase.

The solution is checklist templates. Create a base checklist for your most common engagement type, then create variations for different client profiles. A "simple monthly" template might have 10 steps. A "full-service with payroll and sales tax" template might have 18. The structure and order remain consistent; only the specific steps change.

The most important principle is that the checklist is mandatory, not optional. When month-end gets busy and your team is under pressure, the checklist is what prevents steps from being skipped. The quality review step, in particular, is the one most likely to be dropped when time is short — and it is the one that matters most.