A bank reconciliation is a monthly comparison of an account's balance in the books with its balance on the bank statement. Each side is adjusted for items the other has not recorded yet, such as outstanding checks, deposits in transit, bank fees and interest. When the two adjusted balances agree, the books and the bank tell the same story.
Bank reconciliation in one sentence
A bank reconciliation compares the cash balance in a client's ledger with the ending balance on the bank statement for the same date, then explains every difference. That is the whole idea. The rest is the method for finding the differences and deciding which side each one belongs to.
Two records describe the same money from different ends. The ledger, or the checkbook for a very small business, records transactions when the client makes them: a check written, a deposit made. The bank statement records them when the bank processes them. Most differences come from that timing gap, and a few come from mistakes on one side or the other.
The IRS describes the same exercise for small businesses. IRS Publication 583, in its section on reconciling the checking account, says the statement may differ from the checkbook because of bank charges not yet recorded, or deposits and checks that had not reached the bank by the statement date. It recommends reconciling the checking account each month.
A reconciliation has a fixed date, normally the statement's closing date. Everything is measured as of that day. A check written on the 30th and paid by the bank on the 3rd of the next month is a difference on the reconciliation for the 30th, and gone by the next one.
The output is a short schedule, not a judgment. It shows the bank balance, the book balance, every reconciling item and two adjusted balances that match. That schedule is what a reviewer reads and what goes in the client's file.
Matching ledger entries to bank statement lines
Matching ledger entries to bank statement lines means pairing each transaction recorded in the books with the same transaction on the bank statement. A matched pair is settled and drops out. Whatever is left unmatched on either side, after every pair is found, becomes the list of reconciling items for the month.
Match on amount first, then on a second detail. For checks, that detail is the check number. For deposits, it is the date and the deposit total. For electronic payments, it is the payee name or reference. Amount alone is not enough, because a client with a recurring $250.00 payment will have several identical amounts in a month.
Watch for one-to-many matches. A client may record three customer payments as separate ledger entries and take them to the bank together as one deposit. The statement shows one line for the total. The three ledger entries match that single line only when added together.
Publication 583's steps follow this order. It says to compare the deposits on the statement with those in the checkbook, then compare paid checks against the checkbook by number and amount, marking each one that cleared. In the publication's words, the checks not marked are the outstanding checks.
What remains unmatched usually falls into four groups:
- In the books, not yet at the bank: checks written but not paid (outstanding checks) and deposits recorded but not yet credited (deposits in transit).
- At the bank, not yet in the books: service fees, interest credited, returned checks and automatic payments the client did not record.
- Errors in the books: an amount typed wrongly, an entry posted twice, a transaction missed.
- Errors at the bank: rare, but possible, and worth raising with the bank promptly.
Before matching starts, the statements themselves should be complete and continuous for the period. The guide to tying out bank statements month to month explains that first check.
The adjusted bank balance and adjusted book balance
The adjusted bank balance is the statement's ending balance corrected for items the bank has not processed yet. The adjusted book balance is the ledger balance corrected for items the client has not recorded yet. A bank reconciliation is finished when these two adjusted figures are the same amount.
The adjustments run in fixed directions:
| Side | Item | Direction |
|---|---|---|
| Bank | Deposits in transit | Add |
| Bank | Outstanding checks | Subtract |
| Bank | Bank errors | Add or subtract to correct |
| Books | Interest credited by the bank | Add |
| Books | Bank service fees | Subtract |
| Books | Returned checks and unrecorded automatic payments | Subtract |
| Books | Errors in the books | Add or subtract to correct |
Only book-side items need entries in the ledger. Fees, interest and errors in the books are real transactions the client has not recorded. Publication 583 says to update the records for items on the reconciliation that were not recorded or were recorded wrongly. Bank-side items need no entry, because the bank will process them in a later period on its own.
Outstanding checks and deposits in transit are the two items that appear most often, and they behave differently from everything else on the list because they clear on their own. The explainer on what outstanding checks are covers why they arise and when an old one deserves a closer look.
Publication 583 ends its steps with the test: the adjusted bank statement balance should equal the adjusted checkbook balance. If it does not, the publication says to go back over the earlier steps to find the error.
A worked bank reconciliation for one month
A worked bank reconciliation for one month starts from two numbers, the statement's ending balance and the ledger balance on the same date, and adjusts each until they agree. The example below follows a layout similar to the one Publication 583 shows for its sample business, with interest also shown on the book side.
Example reconciliation: March 2026
The client, bank and every figure are fictional. Brightwater Dental keeps its operating account, checking ending XXXX-9047, at Meridian Community Bank. The March statement closes on March 31, 2026.
| Bank side | Amount |
|---|---|
| Ending balance per bank statement, March 31 | 24,318.40 |
| Add: deposit in transit, March 31 | 2,150.00 |
| Subtotal | 26,468.40 |
| Less: outstanding check #2207 | (640.00) |
| Less: outstanding check #2211 | (1,284.75) |
| Less: outstanding check #2213 | (95.60) |
| Total outstanding checks | (2,020.35) |
| Adjusted bank balance | 24,448.05 |
| Book side | Amount |
|---|---|
| Cash balance per ledger, March 31 | 24,470.20 |
| Less: monthly service fee, not yet recorded | (35.00) |
| Add: interest credited, not yet recorded | 12.85 |
| Adjusted book balance | 24,448.05 |
The two adjusted balances agree at $24,448.05, so March reconciles. Two ledger entries follow from it: one for the $35.00 fee and one for the $12.85 interest. After they are posted, the ledger balance becomes $24,448.05.
The three checks and the March 31 deposit need no entry. They should appear on the April statement. If check #2207 is still outstanding in June, that is a question for the client, not a routine timing item.
When the two sides do not agree, the difference is the starting clue. A difference that is a round number, a multiple of nine or exactly double one transaction each points somewhere specific. The guide to bank reconciliation errors works through how to read the difference and find the cause.
What does a bank reconciliation not prove?
A bank reconciliation does not prove that the books are right. It proves that the cash balance in the ledger agrees with the bank once timing items are explained. Errors that affect both sides equally, or that touch only which account a transaction was posted to, pass a reconciliation without leaving a trace.
Some examples of what a reconciliation will not catch:
- Wrong account, right amount. A $900.00 payment to a supplier posted to rent instead of supplies still matches its bank line. Cash is right; the income statement is not.
- Offsetting errors. A deposit recorded $50.00 too high and a check recorded $50.00 too high cancel out in the balance, though each line is wrong.
- Transactions that should not have happened. A payment the client did not authorize, recorded in the books as if it were normal, matches the bank perfectly.
- Personal spending through a business account. It reconciles, because the money did leave the account.
- A missing month of statements. If the run has a gap, a reconciliation of the months on hand can still balance while a month goes unexamined.
This is why a reconciliation is a starting point for review, not the review itself. It tells the firm the cash figure is supported. Whether each transaction was recorded to the right place is a separate question, answered by reviewing the general ledger and the financial statements built from it. The financial statements and ledgers category covers that side of the work.
Who signs off on a client's bank reconciliation?
A client's bank reconciliation usually has three roles: a preparer who builds it, a reviewer who checks it, and an owner who keeps it with the records. In a small firm one person may prepare and a partner may review. The sign-off is a name and a date on each, so anyone can see who did what and when.
The preparer builds the schedule, investigates unmatched items and drafts any ledger entries for fees, interest and errors. A good preparer leaves notes on anything unusual, such as a check outstanding for more than a couple of months.
The reviewer reads the schedule against the statement and the ledger. A review is more than confirming the two adjusted balances agree. It asks whether each reconciling item is reasonable, whether old outstanding items have been followed up, and whether any adjustment looks like a plug made to force a balance.
The client owns the account and the underlying records. For a bookkeeping client, the firm may prepare the reconciliation, but questions about specific transactions still go to the client, who knows what a payment was for.
Keep the finished reconciliation with the statement and the ledger report for the same date. Publication 583 says records must be kept as long as they may be needed for the administration of any provision of the tax code. A month's reconciliation is easiest to defend when the statement it was built from sits beside it.
Schema CPA works at the front of this process: it reads each bank statement as it arrives, ties its ending balance to the next one's beginning balance and points out months missing from the run. The reconciliation itself, matching entries and signing off, stays with the firm. The workflow on the homepage shows where that check fits.