A Practical Month-End Close Checklist for Ontario Businesses

Define responsibilities and the close date

Start by agreeing who does what. The owner may approve expenditures and provide missing documents; a bookkeeper may record transactions and prepare reconciliations; an accountant may review material adjustments. Document those responsibilities in plain language. If everyone assumes someone else checked the bank account or tax balance, the work may never happen despite a polished report.

Choose an internal reporting timetable that suits actual document availability and decision needs. This is a management choice, not a universal Canadian filing deadline. Ask when bank statements, supplier invoices, payroll reports, and sales-system exports become available. Set an earlier deadline for routine documents and a separate process for late information. Record significant delays so management understands the cause.

A simple close register should show the period, preparer, reviewer, outstanding items, and approval date. If one person performs several roles, consider a targeted owner review of sensitive transactions and reconciliations. Separation of duties may be limited in a small business, but that does not mean there can be no review. Focus attention where errors or unauthorized activity would be most consequential.

Assemble the documents before posting adjustments

Collect bank and credit-card statements, invoices, payment-processor reports, payroll summaries, financing statements, and relevant contracts. Use a document index so that missing information is visible. Source records should explain what happened, not just show that money moved. A bank description such as a vendor name rarely establishes the business purpose or tax treatment by itself.

For example, a $2,260 payment may include a current service charge, a deposit, or equipment. Without the invoice and agreement, coding it as a routine expense could be premature. Flag uncertainty and obtain the evidence before deciding. Keep a clear reference between the transaction and its supporting document so the decision can be reviewed later.

CRA's records guidance explains the general six-year retention period and its exceptions ^[1]. It also addresses where records must be kept and when written permission is needed for storage elsewhere. Closing records should be managed within that broader retention policy. Saving a PDF of the final income statement does not preserve all the invoices, transaction details, and working papers that support it.

Reconcile every bank and credit-card account

Reconciliation compares the recorded balance with an independent statement and explains the difference. Check the statement period, opening balance, deposits, withdrawals, fees, and outstanding items. Do not assume that a live bank feed contains every transaction or that a matching feature has correctly categorized each entry. Feeds assist processing; they do not replace review.

Take an illustrative account showing $18,500 in the ledger and $17,900 on the statement. A $600 outstanding payment might explain the difference, but only if the payment is genuine, properly recorded, and still outstanding. Alternatively, an omitted fee or duplicated deposit could be involved. The goal is to explain the difference with evidence, not force agreement through an unexplained adjustment.

Review old outstanding entries and transfers between accounts. A transfer should not become revenue in one account and an expense in another. If a credit-card payment is imported twice, it may distort balances without affecting the transaction you first notice. Retain the reconciliation and statement used for the review. Clear documentation makes the next month's opening position much easier to verify.

Tie sales systems and customer balances together

Compare invoices, point-of-sale or platform totals, customer credits, and payment settlements with the ledger. Online payment processors may deposit amounts net of fees, refunds, or reserves. Recording the net bank deposit as total sales can conceal both revenue and costs. Use the platform's detailed report and document how the settlement reconciles.

For an illustrative transaction, customers pay $5,650 including $650 of Ontario HST on a $5,000 standard-rated supply, while a processor retains a $100 fee. The bank receives $5,550. The $5,550 deposit is not, by itself, the sales figure or HST amount. The example assumes an ordinary taxable Ontario supply and does not determine the separate tax treatment of the processor's fee ^[2].

Review aged receivables and unresolved credits. Ask whether work was completed, invoices were sent, and disputes are documented. Do not write off a balance just because it is inconvenient. Corrections and collection decisions should be authorized and recorded. The close should improve the quality of the customer schedule, not merely reduce the number of entries appearing on it.

Check suppliers and expense completeness

Compare supplier statements with recorded invoices and payments. Search for duplicate invoice numbers, unusual amounts, and missing invoices for services already received. Obtain documents for material purchases near the reporting date. A supplier statement can highlight a discrepancy, but it does not necessarily contain all the detail needed to classify a purchase or support a tax claim.

An illustrative business receives an invoice in early April for services performed in March. Whether a March adjustment is appropriate depends on the reporting basis and circumstances. The practical point is to identify the item rather than assume that bank-payment timing decides every expense. Ask the person responsible for accounting judgments to determine the treatment.

Review recurring expenses against contracts and prior periods. An unexpected reduction in rent or subscriptions may be an omission rather than a saving. An increase may reflect a genuine renewal or an accidental duplicate. Keep explanations for significant changes. A useful variance review connects numbers with events and supporting records instead of relying on memory at year-end.

Reconcile payroll and related obligations

Payroll should agree across approved employee information, payroll reports, payment records, and ledger balances. Review gross pay, deductions, employer contributions, and remittances as distinct components. A single net payment to employees does not represent the entire payroll cost or establish that all required remittances have been made. CRA's payroll resources separate calculation, remittance, and information-return responsibilities ^[3].

For an illustrative pay run, gross wages are $8,000 and employee deductions total $1,600, producing $6,400 of net wages. Employer contributions are additional in this simplified example. The $1,600 is not a wage saving available for ordinary spending. Actual CPP, EI, income-tax deductions, benefits, and payment deadlines require the applicable rules and employee facts.

Ontario employment records also require attention. The provincial guide describes different retention periods, including generally three years for specified hours and wage-statement information and generally five years for vacation records ^[4]. Do not apply one blanket deletion period to the whole payroll folder. A close checklist should identify missing approvals or records before they become difficult to recover.

Review GST/HST separately from income tax

Reconcile GST/HST accounts to invoices, eligible purchase documentation, prepared returns, and remittances. CRA's guidance explains that the invoice date generally determines the reporting period for tax charged, whether or not payment has been received ^[2]. A cash-focused owner may otherwise overlook collectible tax on unpaid invoices. The specific facts and any special rules still need consideration.

Do not claim an input tax credit solely because accounting software recognizes a tax code. Registration status, commercial use, supporting information, and other conditions matter. If a supplier invoice is incomplete or a transaction has unusual tax treatment, flag it for review. Keep a record of the decision and any corrected document obtained.

A monthly internal close does not change your assigned GST/HST reporting period or filing deadline. Use the CRA account and applicable guidance to maintain the actual compliance calendar. Income-tax estimates are another workstream. Bringing all obligations into one calendar is helpful, but combining their calculations or assuming their due dates are identical is not.

Examine assets, loans, and owner transactions

Review purchases that may represent assets rather than current expenses. Keep invoices, financing terms, and information about business use. Depreciation for accounting and capital cost allowance for tax are not automatically the same calculation. Obtain appropriate advice about classification and measurement instead of using a bank-feed rule that sends every large purchase to one expense account.

Reconcile loan principal to lender statements and understand which portions of payments relate to interest or other charges. A repayment can reduce cash without reducing profit by the same amount. This is one reason a profitable month may still involve declining cash. The financial-statements guide explains the wider relationship among profit, assets, obligations, and cash movements.

Owner transactions need clear labels and evidence. Money deposited by an owner is not automatically sales, and withdrawals are not automatically a deductible expense. The treatment depends on the entity and transaction. Do not resolve ambiguity by choosing the category that produces the most attractive report. Keep the supporting explanation and refer sensitive transactions for review.

Review unusual balances and draft results

Generate a draft trial balance, income statement, balance sheet, and relevant schedules. Look for accounts with unexpected signs, old suspense entries, abrupt changes, and unexplained balances. Compare the draft with the prior period and budget on a consistent basis. A report can be arithmetically balanced while still containing omissions, duplication, or misclassification.

Use an exception log that distinguishes confirmed errors from unresolved questions. For each item, record the amount, issue, supporting evidence, proposed action, and responsible person. Management should know if a draft figure may change. A provisional report with transparent limitations is more useful than a supposedly final report whose important assumptions are hidden.

Do not fix every difference with a general journal entry. Understand the underlying transaction and whether the source system should be corrected. Adjustments need a date, description, evidence, and authorization appropriate to the business. Preserve a history that explains what changed. This allows the next reviewer to evaluate the decision rather than reconstruct it from scattered emails.

Approve, preserve, and use the final package

Once reviewed, identify the approved version and retain the reconciliations, adjustments, reports, and outstanding-item list. Use software period controls appropriately so that later changes do not silently alter previously distributed information. If a prior-period correction is necessary, document the reason and communicate its effect. A locked period is a control, not a reason to leave a known error unaddressed.

Maintain a handover note with the next period's opening balances, unresolved items, and expected follow-up. This is particularly helpful when a different person prepares the next close or when an external adviser completes year-end work. The note should identify where supporting documents are stored, not duplicate sensitive information unnecessarily. A reviewer should be able to distinguish an issue carried forward intentionally from an item forgotten during a busy period.

Check that the final reports can be reproduced from the approved ledger version. If a spreadsheet introduces adjustments outside the accounting system, document that bridge and clarify whether posting is required. Otherwise, the owner may receive one set of figures while the next preparer starts from another. Consistent version control supports meaningful comparisons and reduces avoidable reconstruction work.

Meet briefly to discuss results and upcoming cash needs. BDC's cash-flow planner supports both short-term and annual forecasting ^[5]. Update your own forecast with the closing balances and known commitments. Identify actions such as collecting overdue invoices, clarifying a supplier balance, or adjusting a purchasing plan. Assign owners and dates so that reporting leads to follow-through.

Review the process after a few closes. Which documents consistently arrive late? Which accounts repeatedly require corrections? Training or a better intake process may solve the cause more effectively than another spreadsheet. LMAR's accounting, bookkeeping, and training pages describe relevant services. Bring your current workflow and exception list to a discussion so support can be based on actual needs rather than a generic promise of a faster close.