What bank reconciliation is and why you do it
Bank reconciliation is the process of comparing your personal records — the transactions you wrote down or entered into your own system — against the official statement your bank sends you. The goal is to find out whether the two match, and if they don't, to figure out why.
You reconcile because banks make mistakes, you make mistakes, and timing creates gaps. A check you wrote last week might not have cleared yet. A deposit you recorded might not have posted. Your bank might have charged a fee you forgot about. Until you reconcile, you don't actually know how much money is available to spend.
Most people reconcile monthly, using the statement the bank mails or emails at the end of each month. Some people who write many checks or use cash heavily reconcile weekly. The frequency depends on how many transactions you have and how much money moves through the account.
Key Takeaways
- Bank reconciliation compares your personal transaction records against your bank statement to find discrepancies and catch errors.
- You need your bank statement, your check register or transaction log, and a way to mark off items as you verify them — paper or a spreadsheet both work.
- Outstanding checks and deposits in transit are normal reasons why your balance and the bank's balance don't match; they clear within days.
- If a transaction appears on the bank statement but not in your records, or vice versa, you must investigate before you can balance.
- Once you find and explain every difference, your personal balance and the bank's balance should match exactly.
Gather your bank statement and your transaction records
Pull your most recent bank statement. This is the official record from your bank, showing every transaction that cleared during the statement period — usually one month. You can get this by mail, email, or by logging into your bank's website.
Next, gather your personal records of transactions. This might be a check register (the small booklet that comes with checks), a spreadsheet you maintain, a notebook where you write down withdrawals, or a record in your banking app. The format doesn't matter; what matters is that you have written down every transaction you made during the same time period as the statement.
If you use online banking, your bank's app or website usually shows a running list of transactions. Print or screenshot this list so you have a copy to mark up as you work. Some people prefer to work on paper; others use a spreadsheet. Either method works.
List all outstanding checks and deposits not yet cleared
An outstanding check is a check you wrote and recorded in your register, but that has not yet cleared the bank. A deposit in transit is money you deposited but that hasn't posted to your account yet. Both are normal and expected.
Go through your personal records and identify every check you wrote that does not appear on the bank statement. Write down the check number and the amount. Do the same for any deposits you made that don't show on the statement yet. These items explain why your personal balance is different from the bank's balance — and that's okay.
Checks usually clear within three to five business days. Deposits can take one to three business days, depending on how and when you deposited them. If a check or deposit is older than two weeks and still hasn't cleared, contact your bank to investigate.
Mark off transactions that match between both records
Start with the first transaction on your bank statement. Find that same transaction in your personal records. When you find it, mark it off in both places — a checkmark, a highlight, or a note that says "cleared" all work equally well.
Move through the entire bank statement this way, one transaction at a time. Mark off deposits, withdrawals, automatic payments, and any fees or interest the bank charged. The order might be different between your records and the statement, so don't assume a transaction matches just because it's in the same position. Match by date and amount instead.
When you're done, every transaction on the bank statement should be marked. If something on the statement is not in your personal records, or something in your records is not on the statement, leave it unmarked for now. You'll investigate those next.
Investigate unmarked transactions and discrepancies
If a transaction appears on the bank statement but not in your records, ask yourself: Did I forget to write this down? Is this a fee or charge I didn't expect? Is this a deposit that posted under a different name or amount than I thought? Write down what you find and add it to your personal records if it's legitimate.
If a transaction is in your personal records but not on the bank statement, check the date. If it's recent (within the last week), it's probably still pending and will clear soon. If it's older than two weeks, contact your bank. A deposit might not have posted correctly, or a check might have been lost in the mail.
Bank errors do happen — a transaction posted twice, an amount was entered wrong, or a deposit was credited to the wrong account. If you find evidence of a bank error, contact your bank with the statement and the transaction details. The bank will investigate and correct it.
Calculate your adjusted balance and verify it matches
Take your personal account balance — the amount you believe you have based on your records. Add back any deposits in transit that haven't cleared yet. Subtract any outstanding checks that haven't cleared yet. This is your adjusted personal balance.
Now take the balance shown on your bank statement. This is the bank's official balance as of the statement date. If your adjusted personal balance matches the bank's statement balance exactly, you have successfully reconciled. If they don't match, you have an error somewhere.
If the amounts don't match, go back through your records. Look for a transaction you marked incorrectly, a math error in your register, or a transaction you recorded with the wrong amount. Common mistakes include reversing digits (writing 45 instead of 54), forgetting to subtract a withdrawal, or adding a deposit twice. Check your arithmetic carefully.
Document your reconciliation and keep records
Write down the date you reconciled, the statement period it covers, the beginning and ending balances, and any outstanding items. Keep this record with your bank statement. If a question comes up later — a check that never cleared, a deposit that went missing — you'll have documentation of what you found and when.
If you use a spreadsheet, save it with a filename that includes the month and year, like "Bank Reconciliation Jan 2025". If you work on paper, file the statement and your notes together in a folder or binder. Most people keep reconciliation records for at least one year, and some keep them longer for tax purposes.
Once you've reconciled, you can trust that your personal balance is accurate. This is the real amount you have available to spend, and it accounts for everything — cleared transactions, pending items, and any fees or interest the bank charged.
Frequently Asked Questions
What if I can't find where the difference is?
Start by checking your math: add up all deposits and subtract all withdrawals by hand to make sure your register total is correct. Then verify that every amount on the bank statement matches what you recorded — look for reversed digits or amounts entered wrong. If you still can't find it, contact your bank with both your records and the statement; they can help trace the discrepancy.
How long should I wait before I assume a check is lost?
Most checks clear within five to seven business days. If a check is more than two weeks old and still hasn't appeared on your statement, contact your bank. They can trace it and issue a replacement if it was lost. In the meantime, don't spend that money again.
Do I need to reconcile if I use online banking and can see all my transactions?
Yes. Even though online banking shows transactions quickly, reconciliation catches errors you might miss otherwise — a duplicate charge, a transaction posted to the wrong account, or a fee you didn't notice. Reconciling takes 15 to 30 minutes and gives you confidence in your balance.
What counts as a bank error versus my mistake?
A bank error is something the bank did wrong: a transaction posted twice, an amount was entered incorrectly, or a deposit was credited to the wrong account. Your mistake is something you did: you forgot to record a transaction, you wrote down the wrong amount, or you didn't subtract a withdrawal. If you find a bank error, report it with documentation and the bank will correct it.
Can I reconcile using my bank's app instead of doing it manually?
Many banks offer a built-in reconciliation tool in their app or website that does some of the work for you — it marks off transactions automatically and calculates the difference. You still need to investigate any unmarked items and verify the final balance. Using the bank's tool can save time, but the process is the same.