Guides
Monthly Bookkeeping Checklist for Small Business Owners
A practical, repeatable checklist for keeping your books accurate, your cash flow healthy, and your business audit-ready — every single month.
Why a monthly close matters
Closing the books each month catches problems while they're small, gives you the financial visibility to make confident decisions, and makes tax time a non-event instead of a scramble. Block 2–4 focused hours on the same day each month and run through the steps below.
1. Reconcile every bank & credit card account
Matching your books to every statement is the foundation of clean financials. Do it monthly so issues stay small and easy to track down.
- Reconcile each checking, savings, and credit card account against the statement
- Investigate any unmatched or duplicate transactions immediately
- Verify cleared deposits and outstanding checks
- Confirm transfers between accounts post on the same date
2. Categorize and review every transaction
Accurate categorization drives accurate reports — and a clean tax return at year-end.
- Categorize every income and expense transaction
- Split mixed-purpose charges (e.g. office supplies vs. personal)
- Attach receipts to anything over your documentation threshold
- Flag and resolve uncategorized or "Ask My Accountant" items
3. Review accounts receivable and payable
Cash flow lives and dies on AR/AP. A weekly glance is great; a monthly close is non-negotiable.
- Send statements or reminders for invoices 30+ days past due
- Write off uncollectible receivables and document the reason
- Schedule upcoming bill payments and confirm vendor balances
- Reconcile credit card and loan balances to lender statements
4. Run payroll and remit payroll taxes
Late or inaccurate payroll filings are one of the most expensive small-business mistakes. Build this into a fixed monthly cadence.
- Confirm every pay run cleared and posted to the books
- Remit federal, state, and local payroll taxes on schedule
- Reconcile payroll liabilities against your payroll provider's reports
- Update employee records for any new hires, terms, or rate changes
5. Close the books and review your P&L
Closing the period prevents accidental edits and gives you a trustworthy snapshot of how the business is doing.
- Post recurring journal entries (depreciation, prepaid expenses, accruals)
- Generate Profit & Loss and Balance Sheet for the month
- Compare results to the prior month and budget — investigate variances
- Lock or close the period in your accounting software
6. Plan ahead for tax and compliance
Monthly habits make quarterly estimates and year-end filings dramatically easier — and a lot cheaper.
- Set aside estimated income tax for the month
- Track sales tax collected and remit per your filing schedule
- File 1099 information for new contractors as it's collected
- Save a backup of the closed books to secure storage
Rather hand the checklist off?
Our Royal package handles every step above for you — reconciliations, payroll, tax-ready books, and a monthly review with a real bookkeeper. Free 30-minute consult, no obligation.