How to Reconcile a Bank Account (And Why It Is Non-Negotiable)
Reconciliation is the monthly proof that your books match reality. Seven steps, about twenty minutes an account — and the one habit that keeps errors from compounding for a year.
Bank feeds create a comfortable illusion: transactions flow in automatically, so the books must be right. They are not. Feeds drop transactions, duplicate them, and import them with the wrong date more often than anyone expects.
Reconciliation is the check. It is the one routine that turns "I think the books are right" into "I know the books are right, and here is the report that proves it."
The short answer
How do I reconcile my bank account in my bookkeeping?
Take the official monthly statement, tell your accounting software the closing balance and date, then tick off every transaction that appears in both the statement and your books. When the remaining difference is zero, the month is proven. Any difference that will not resolve is a real error to find — never force it.
What reconciliation actually proves
The process of matching every transaction in your books against the bank's own record for the same period, and confirming the two arrive at the same ending balance. It proves completeness — that nothing is missing, duplicated, or invented.
Your accounting software will happily produce beautiful, confident reports from incomplete data. Reconciliation is the only step that tests whether the data underneath is complete.
The seven steps
Get the official statement
Download the PDF statement for the month — not a screenshot of today's balance. You need a fixed period with a defined opening balance, closing balance and end date. The bank's live balance is a moving target and cannot be reconciled to.
Check the opening balance first
Before entering anything, confirm that the opening balance in your software matches the statement's opening balance.
If it does not, stop. Something changed in a previously reconciled period — usually someone edited or deleted a transaction after the fact. Fix that before going further, or you will spend an hour hunting a difference that was already there when you started.
Enter the ending balance and date
Give the software the statement's closing balance and closing date. This is the target. Everything from here is the process of getting your book balance to agree with it.
Tick off what matches
Work down the statement line by line, marking each transaction that appears in both places. Match on amount and date. A $412.00 payment on the 3rd and a $412.00 payment on the 19th are not necessarily the same transaction, and assuming they are is how duplicates survive.
Work in the same order as the statement
Sort your software's reconciliation view by date, then follow the statement top to bottom rather than jumping around. It is slower for the first two minutes and much faster overall, because anything unmatched is left visibly stranded.
Investigate whatever is left
When the difference is not zero, it is one of a short list of things. Check them in this order:
| Difference looks like | Usual cause | | --- | --- | | Equals one transaction exactly | A transaction missing from your books, or entered twice | | Is divisible by 9 | A transposed digit — $540 entered as $450 | | Is a round small amount | A bank fee, interest, or card processing charge never recorded | | Is exactly double a transaction | Same item imported by the feed and entered manually | | Appeared out of nowhere | An edited or deleted transaction in a prior reconciled period |
Never force the balance
Every accounting package offers to "adjust" the difference for you. That creates a permanent plug entry that misstates your books and has to be unwound at year end — often by someone billing hourly. A $3.20 difference is a real error, and it takes less time to find now than to explain in March.
Finish and close the period
Complete the reconciliation, then lock or close the period in your software. Locking is what stops a reconciled month from quietly changing later — which is the single most common cause of step 2 failing next month.
File the statement with the report
Save the statement PDF and the reconciliation report together, named by account and month. If anyone ever questions a period — a lender, a buyer, an auditor, your future self — this pair is the proof.
- Every business checking account reconciled to its statement
- Every business savings account reconciled
- Every credit card reconciled to its statement
- Loan and line-of-credit balances agreed to the lender statement
- Merchant/payment processor account reconciled to deposits received
- Period locked after each reconciliation completes
- Statements and reconciliation reports filed together
What to remember
- 01Bank feeds are input, not proof. Reconciliation is the proof.
- 02Check the opening balance before you start — a mismatch there means a prior period changed.
- 03A difference divisible by 9 is almost always a transposed digit.
- 04Never accept the software's offer to force the balance; it creates a plug entry someone pays to unwind.
- 05Lock the period after reconciling so proven months stay proven.
Now that the numbers are proven, read what they are telling you.
Common questions
- What if my reconciliation is off by a small amount?
- Never force it. A small difference is still a real error — usually a transposed digit, a duplicate, or a bank fee never recorded. Forcing a balance creates a permanent plug entry in your books that your accountant will have to unwind at year end.
- How often should I reconcile?
- Monthly, for every bank account, credit card, loan and merchant account. Reconciling once a year means finding twelve months of compounded errors at exactly the moment you have the least time to fix them.
- Do I need to reconcile credit cards too?
- Yes. Credit cards are where duplicate and missing expense entries hide most often, because the same purchase can arrive through both a bank feed and a manually entered receipt.