How to Reconcile Bank Accounts Monthly: A Step-by-Step Guide

Bank reconciliation is the process of comparing your internal accounting records against your bank statement to confirm they agree — and resolving any differences before you close the books. Done monthly, it gives you a verified cash position, catches errors and unauthorized transactions early, and produces the clean, reliable numbers that every other financial decision depends on.

Key Takeaways

• Bank reconciliation compares your accounting ledger to your bank statement and resolves every difference before the month closes.
• A consistent 7-step process — from gathering statements to archiving the final report — keeps the work predictable and repeatable.
• Common discrepancies include deposits in transit, outstanding checks, bank fees not yet recorded, and data-entry errors.
• Reconciling monthly (rather than quarterly or annually) limits the window in which errors or fraud can compound undetected, per Washington State Auditor guidance.
• The reconciliation is complete only when your adjusted book balance equals your adjusted bank balance — not before.

What Is Bank Reconciliation and Why Does It Matter?

Bank reconciliation is the process of comparing cash and investment balances and activity according to the bank against your accounting records, and reconciling or following up on any differences — as defined by the Washington State Auditor's BARS GAAP Manual.

That definition matters because it frames reconciliation as a control activity, not just a bookkeeping chore. According to the Washington State Auditor's Best Practices guidance, reconciliations identify unapproved or unallowable activities, surface errors that staff or the bank failed to record promptly, and give management a true cash position.

For service businesses — agencies, consultancies, software studios — the stakes are concrete. When your book balance and bank balance diverge, you may be making hiring or spending decisions on a cash figure that doesn't reflect reality. The reconciliation is what closes that gap.

The CPA Ireland step-by-step guide adds another dimension: reconciliations help identify potentially fraudulent activities, safeguarding the business against losses. That's not a theoretical risk — unauthorized charges, duplicate payments, and vendor fraud all show up first as unexplained discrepancies in a reconciliation.

How to Reconcile Bank Accounts Monthly: 7 Steps

The process below follows the sequence outlined by Bob's Bookkeepers and aligns with the HighRadius 8-step framework. Adapt the labels to your tools, but keep the sequence intact.

Source: Bob's Bookkeepers, Account Reconciliation Made Simple

Step 1: Choose the accounts to reconcile

Start by identifying which accounts require reconciliation this month. At minimum, reconcile every active bank account. High-volume or high-risk accounts — operating accounts, payroll accounts, accounts with pass-through transactions — warrant priority attention. Per the Washington State Auditor, all accounts should be included in a complete reconciliation, including investment accounts, zero-balance accounts, and accounts held by fiscal agents.

Step 2: Gather records

Collect your bank statement for the period, your general ledger or accounting software transaction list, and any supporting receipts or remittance advice. Per the Washington State Auditor's BARS Manual, a global reconciliation begins by compiling the ending balance, receipts, and deposits for the month across all bank statements — typically organized into a schedule or series of schedules.

Use your accounting software's reconciliation report to retain the supporting record. For teams using spreadsheets, Wolters Kluwer's monthly bank reconciliation worksheet provides a structured starting point: plug in the bank statement balance, deposits in transit, outstanding checks, and your book balance.

Step 3: Match transactions

Go line by line. For each transaction on the bank statement, find the corresponding entry in your ledger. Mark matched items. Per HighRadius, this step involves matching deposits and withdrawals to the balance sheet — not just confirming amounts, but confirming that the right account, date, and payee are recorded correctly.

In practice, this is where most of the time goes. A 15-person agency processing several hundred transactions a month will spend the bulk of reconciliation time here. Tools like QuickBooks Online's bank feed can pre-match many transactions, but human review of the exceptions is still required.

Step 4: Identify discrepancies

After matching, you'll have a list of unmatched or mismatched items. Common categories:

• Deposits in transit — payments you've recorded in your books that haven't yet cleared the bank
• Outstanding checks — checks you've issued that the payee hasn't cashed
• Bank charges or interest — fees the bank deducted that aren't yet in your ledger
• Errors — data-entry mistakes on either side, or check deposit errors (flagged specifically by HighRadius)
• Unauthorized transactions — charges that shouldn't be there at all

Document every discrepancy with enough detail to resolve it: amount, date, description, and the likely cause.

Step 5: Make adjustments

For each discrepancy, take the appropriate action. Per Bob's Bookkeepers:

• Bank charges or interest not yet recorded: add them to your ledger.
• Company errors: correct the incorrect entries in your accounting records.
• Bank errors: contact the bank directly to resolve — do not adjust your books to match a bank error.
• Deposits in transit and outstanding checks: these are legitimate timing differences; list them as reconciling items rather than errors.

The Washington State Auditor notes that funds should not carry a negative cash balance in the accounting records — any negative balance should be resolved, not left as a reconciling item.

Step 6: Document and review

Once adjustments are made, verify that your adjusted book balance equals your adjusted bank balance. This is the reconciliation's completion test. Document what changed, why, and who approved it. For businesses with more than one person involved in finance, a second set of eyes on the final reconciliation is a meaningful internal control.

Columbia University's finance guidance states that bank account reconciliations must be prepared monthly by the person responsible and approved monthly by the appropriate supervisor — an example of separation of duties that private businesses can adapt to their own approval structure.

Step 7: Finalize and archive

Save the completed reconciliation report and all supporting documentation. Per Bob's Bookkeepers, the goal is audit-ready records — meaning someone unfamiliar with your books could pick up the file and understand what was reconciled, what differences were found, and how they were resolved.

In QuickBooks Online, the reconciliation report saves automatically. For spreadsheet-based processes, save a dated copy in a consistent folder structure. See our guide to reconciliation software vs. spreadsheets if you're deciding which approach fits your business.

What Are the Most Common Causes of Discrepancies?

Most reconciliation differences fall into a small number of categories. Knowing them in advance makes the identification step faster.

Timing differences are the most common and least alarming. Deposits in transit and outstanding checks exist because your books and the bank record transactions on different schedules. These resolve themselves in the following period — but they must be listed explicitly as reconciling items, not ignored.

Recording errors happen when a transaction is entered with the wrong amount, wrong date, or wrong account. A transposition error is a classic cause of a reconciliation that won't balance. HighRadius specifically flags check deposit errors as a category to watch.

Missing entries occur when a bank fee, interest credit, or automatic payment hits the bank but was never recorded in the ledger. These are easy to miss if you're not reviewing the bank statement line by line.

Unauthorized or fraudulent transactions are the most serious category. The Washington State Auditor's Best Practices guidance is explicit: reconciliations identify unapproved or unallowable activities. A monthly cadence limits the window in which fraud can go undetected.

How Often Should You Reconcile Bank Accounts?

Monthly reconciliation is the standard for most service businesses. Columbia University's finance policy requires monthly preparation and monthly approval. The Washington State Auditor treats monthly reconciliation as a baseline control.

For accounts with very high transaction volume, more frequent reconciliation — weekly or even daily — reduces the backlog and makes each session faster. For low-activity accounts, monthly is typically sufficient.

The practical argument for monthly over quarterly: errors and fraud compound. A discrepancy caught in week three of the month is far easier to resolve than one discovered three months later, when the paper trail has gone cold and the people involved may no longer remember the transaction.

Who Should Be Responsible for Bank Reconciliation?

Responsibility depends on the size and structure of the business. The Washington State Auditor's Best Practices guidance notes that reconciliations can be completed in stages by different people and later aggregated — a structure that also supports internal controls.

The key internal control principle: the person who reconciles the account should not be the same person who authorizes transactions or has custody of cash. Separation of duties is what makes reconciliation an effective fraud-prevention tool, not just a bookkeeping exercise.

For founder-led businesses where one person handles multiple roles, an outsourced accounting partner can provide the independent review layer. For a deeper look at how that works in practice, see our guide to account reconciliation best practices for service businesses.

How Does the Monthly Close Connect to Bank Reconciliation?

Bank reconciliation is one component of the monthly close — but it's foundational. You cannot produce a reliable P&L or balance sheet until the cash accounts are reconciled. Every other close task (accruals, revenue recognition, expense categorization) builds on a verified cash position.

Agree on a close deadline that fits your reporting needs and the availability of source documents. A consistent reconciliation process and prompt resolution of discrepancies make that schedule easier to maintain.

The balance sheet reconciliation checklist covers how bank reconciliation fits into the broader set of accounts that need to be verified each month. For teams evaluating whether their current close process is working, viewing a sample close shows what decision-ready financials look like in practice.

Frequently Asked Questions

What is bank reconciliation?

Bank reconciliation is the process of comparing your internal accounting records to your bank statement to confirm they agree, and resolving any differences. It verifies your true cash position, catches recording errors, and identifies unauthorized transactions before the books are closed for the month.

Why are bank reconciliations important?

Bank reconciliations are a necessary control to safeguard cash against fraud and losses and to ensure the accuracy of accounting records, per the Washington State Auditor. Without them, errors and unauthorized charges can go undetected for months, compounding the damage.

What is the difference between bank reconciliation and general ledger reconciliation?

Bank reconciliation compares your cash account in the ledger to the bank statement — it's one specific account. General ledger reconciliation covers all balance sheet accounts, verifying that every account balance is supported by underlying documentation. Bank reconciliation is a subset of the broader general ledger reconciliation process.

When should reconciling items be addressed?

Reconciling items — deposits in transit, outstanding checks, and unrecorded bank fees — should be addressed within the same close cycle in which they're identified. Timing differences that don't clear in the following period should be investigated, as they may indicate an error or a transaction that was never completed.

Laya provides this content for informational purposes only. This material does not constitute tax, legal, or accounting advice. Please consult your own tax, legal, and accounting advisors before engaging in any transaction.

If your monthly reconciliation is taking longer than it should — or your books aren't closing until week three — book an intro call to see how a structured close process can fix that.