How to Reconcile Your Business Bank Account Every Month

Your accounting software says the business checking account holds $8,412. Your bank app says $7,960. The gap is $452, and you have no idea which number is real. So you do what most owners do: trust the bank, shrug at the software, and promise yourself you will sort it out at tax time.

By tax time, that $452 has become fourteen small mysteries across nine months, and your bookkeeper bills you by the hour to untangle them. Monthly bank reconciliation exists to stop exactly this. It is twenty to forty minutes of matching, once a month, and it is the single routine I would keep if I could keep only one.

What reconciling really checks

Reconciling means proving that your books and your bank statement describe the same money, line by line, as of the same date. The two will almost never show the same balance on any given day, and that is fine. What matters is that every difference has a name.

Legitimate differences are timing. A check you wrote on the 29th that the supplier deposits on the 3rd. A card sale your processor batches out two days later. These are called outstanding checks and deposits in transit, and they resolve on their own next month.

Everything else is an error, and it is usually one of these:

• A transaction imported twice from the bank feed, often after you reconnected the account.
• Bank fees, interest or a merchant chargeback that never got recorded in the books.
• A payment categorized to the wrong account, such as a loan payment booked entirely as an expense.
• A personal purchase on the business card, which is one more argument for separating business and personal accounts.
• A typo: $1,250 entered as $1,520. Transposed digits leave a difference that divides evenly by 9, which is a handy clue when you are stuck.

The myth that bank feeds make this unnecessary

Owners tell me all the time that QuickBooks or Xero pulls in every transaction automatically, so reconciliation is something accountants did in the paper era. I understand the logic. I also find duplicated or missing entries in nearly every file where nobody has reconciled for six months.

Bank feeds are a convenience, not a control. They break when a bank changes its connection, re-import a week of history when you re-link, and quietly skip transactions during outages. They also cannot tell you whether the $600 deposit was a customer payment or a refund from a vendor. A feed puts transactions in front of you. Reconciling is the step where you confirm they are complete, correct and recorded once.

A bank feed tells you what happened at the bank. Reconciliation tells you whether your books agree with it.

A monthly routine, step by step

Do this within the first ten days of each month, for the month just closed. Waiting longer is how the backlog starts.

1. Download the bank statement as a PDF for the full month. Use the official statement, not the live app balance, because the statement has a fixed closing date and balance.
2. In your software, open the reconcile screen for that account and enter the statement ending date and ending balance exactly as printed.
3. Tick off every transaction that appears on both the statement and in your books. Work by amount, not by description, since bank descriptions are often cryptic.
4. Add anything on the statement that is missing from the books: fees, interest, automatic payments you forgot to record.
5. Look at what remains unticked in the books. Checks not yet cashed and deposits in transit can stay. Duplicates get deleted. Anything else gets investigated.
6. When the difference reaches zero, finish the reconciliation and save the report. Most software keeps it, but I also save a PDF next to the statement in a folder named by month.
7. Write one line in a log: date reconciled, who did it, and anything odd you noticed.

Repeat for every account the business uses, including credit cards and payment processors like PayPal or Stripe. Cards are where personal spending and missing receipts hide.

A worked example, with made up numbers

Take the $452 gap from the opening. These figures are illustrative, but the pattern is one I see constantly.

The statement closes at $7,960. Ticking off matched items leaves three lines unexplained. A check for $783 to a cleaning contractor, written on the 30th, has not cleared yet: that is timing, nothing to fix. A $35 monthly account fee sits on the statement but not in the books, so you record it. And a $1,200 customer payment appears twice in the software because the feed re-imported it after a password change, so you delete one copy.

Now compare. The books started at $8,412; remove the duplicate ($1,200) and record the fee ($35), and they show $7,177. The bank shows $7,960, but $783 of that is already promised to the contractor, so the adjusted bank figure is also $7,177. Both sides agree. Two real errors, one timing item, done in about half an hour.

Notice what would have happened without reconciling: your profit and loss report would have shown $1,200 of revenue you never earned. That flows into estimated tax payments, pricing decisions and how much you think you can pay yourself.

When the numbers refuse to match

Sometimes you get stuck with a stubborn difference of, say, $27.40. Before you spend an evening on it, check three things. First, whether last month was actually finished; an unreconciled prior month carries its errors forward. Second, whether someone edited or deleted an already reconciled transaction, which most software flags in an audit log. Third, the divide by 9 test for transposed digits.

If none of that works and the amount is small, some owners book it to a clearly labeled adjustment account and move on, with a note. I would rather you do that and keep the habit than abandon the routine over a few dollars. If the unexplained amount grows month after month, though, stop and get help, because that pattern is how theft and serious errors usually look. It is also exactly the kind of steady, unglamorous work I wrote about in why boring bookkeeping is a business superpower.

Your one task this week

Pick the main business checking account and reconcile only last month. Not the whole year, not every account. Put the bank statement and your software side by side, follow the seven steps, and see how far off you are. If the gap is zero, book a recurring thirty minute slot on the 5th of every month. If it is not, you have just found out where your books need attention, and the bookkeeping basics page is a good place to check the rest of your setup.