Last reviewed October 7, 2026 · By the NYBACS advisory team
Short answer
Bank reconciliation is the process of matching the cash balance in a company's books to the balance on its bank statement for the same date, and explaining every difference — uncleared payments, deposits in transit, bank fees, errors or missing entries. It matters because unreconciled books can overstate or understate cash, hide duplicate or missing transactions, and produce tax returns and financial statements that will not hold up to review.
Key takeaways
- A reconciliation compares the ledger balance with the statement balance at the same date; seeing each transaction in a bank feed is not the same thing.
- Legitimate reconciling items are timing differences — payments not yet cleared and deposits in transit — that should clear within weeks.
- Reconciling items that never clear usually point to duplicates, deleted transactions or mispostings.
- Every cash-like account needs its own reconciliation, including fintech sub-accounts, processor balances, wallets and company cards.
- Tax preparers, auditors, lenders and parent companies typically treat year-end reconciliations as the starting point for their review.
How a reconciliation works, with a worked example
The method is the same for any account:
- Take the ending balance from the official statement.
- Add deposits recorded in the books that the bank has not yet credited.
- Subtract payments recorded in the books that have not yet cleared.
- Compare the adjusted bank balance with the book balance.
- Investigate and correct any remaining difference.
| Item | Amount (USD) |
|---|---|
| Statement ending balance, March 31 | 48,200 |
| Add: customer payment received March 31, credited April 1 | 3,500 |
| Less: contractor payment sent March 30, not yet cleared | (2,150) |
| Adjusted bank balance | 49,550 |
| Book balance before review | 49,610 |
| Difference | 60 |
The USD 60 difference turns out to be an incoming-wire fee charged by the bank and never recorded. Booking it as a bank charge brings the book balance to 49,550 and the account reconciles. The fee is small, but the same process is how missing customer receipts, duplicate payments and unauthorized debits are found.
What bank feeds do and do not do
Accounting software encourages users to match or accept transactions from a bank feed, and many founders assume that is reconciliation. It is not. A feed can:
- Skip transactions when the connection fails and silently resume later.
- Import the same transactions twice after a reconnection.
- Bring in pending card amounts that later change.
- Start from a wrong opening balance if the account was connected mid-year.
Only comparing the ledger's ending balance to the statement's ending balance, every month, proves the books contain exactly what happened in the account.
Problems reconciliation catches in foreign-owned companies
Cross-border companies have recurring reconciliation issues that domestic businesses see less often:
- Owner wires coded as revenue, which also distorts profit.
- Currency conversions between USD and other balances in a multi-currency account recorded once instead of on both sides.
- Intermediary bank deductions on international wires, so the amount received is less than the invoice.
- Payments made from the parent's or founder's account that appear in the books but never in the US bank statement.
- Unauthorized or fraudulent debits. Business account agreements often allow only a limited window to dispute these, so finding them quickly matters.
Reconciling cards, processors and wallets
The same discipline applies beyond the checking account. A company credit card is reconciled to the card statement balance, including payments made to the card. A Stripe, PayPal or Amazon balance is reconciled through a clearing account whose balance should equal the funds the platform still holds, including any reserve. Fintech sub-accounts and savings pockets need their own reconciliations, because transfers between them are a common source of duplicates.
How often, and who should do it
Reconcile monthly, as part of the close, for every account. Higher-volume accounts can be reconciled weekly to catch problems earlier.
Where possible, the person reconciling should not be the only person who can approve and release payments. In a small company that may simply mean the founder reviews and signs off the reconciliation report the bookkeeper prepares. Keep each signed report with the statement it was checked against.
What unreconciled accounts cost at tax time and in reviews
An unreconciled account rarely stays a bookkeeping issue. When the year closes, the tax preparer needs a trial balance in which cash agrees to the bank. If it does not, they either stop and send questions back — delaying the return — or they work from bank statements alone and lose the detail the books were supposed to provide, such as which deposits were customer revenue and which were owner funding or intercompany transfers.
The same gap surfaces elsewhere. A bank or fintech running a periodic KYC review may compare reported revenue with account inflows. An auditor will start from year-end reconciliations and sample the reconciling items. A foreign parent consolidating the US subsidiary needs cash balances it can rely on. In each case, a short monthly reconciliation is far cheaper than a reconstruction of twelve months under deadline pressure, which is usually when errors are found that change already-reported numbers.
Common mistakes to avoid
- Marking transactions as reconciled in software without comparing the ending balance to the statement.
- Forcing an unexplained difference into a suspense or discrepancy account and moving on.
- Editing or deleting transactions in previously reconciled months, which changes the opening balance.
- Reconciling only the main checking account and ignoring cards, wallets and processor balances.
- Leaving outstanding items from months ago uninvestigated.
- Recording international wires at the invoice amount rather than the amount actually received.
NYBACS 360° support
How NYBACS helps
- Performs monthly reconciliations for every bank, fintech, card and processor account your company uses.
- Cleans up historical periods where opening balances no longer agree to statements.
- Investigates stale reconciling items and correct entries that caused them.
- Produces reconciliation reports with statement evidence for your tax preparer, auditor or bank.
- Sets up a simple review and sign-off control appropriate to a small team.
Frequently Asked Questions
What if the opening balance no longer matches last month's statement?
Something in an earlier, already reconciled period has been changed or deleted. Find the earliest month where the balance stops agreeing and fix that first, then work forward.
How long can a payment stay outstanding?
Payments that have not cleared after a few months should be investigated: the payee may not have received or cashed it. Uncashed vendor checks can eventually become unclaimed property under state law, so they should not simply be written off.
Does a bank reconciliation have to match to the cent?
Yes. A bank balance is a known figure, so any difference, however small, means something is missing or wrong in the books.
Can software reconcile accounts automatically?
Software can suggest matches and speed up the work, but a person still needs to confirm the ending balance agrees with the statement and investigate exceptions. Automation without review tends to compound errors.
Do we need reconciliations if we use cash-basis accounting?
Yes. Cash-basis books depend even more directly on cash records being complete, so reconciliation is just as important.
