What a bank reconciliation is and why you need to do one
A bank reconciliation is the process of comparing your bank statement to your own records and fixing any differences. You do this to make sure your bank's numbers match yours — which they often don't, at least not at first. The differences are usually timing: a check you wrote that hasn't cleared yet, a deposit you recorded but the bank hasn't processed, or a fee the bank charged that you didn't know about.
You need to reconcile because your bank statement is the official record of what actually moved through your account. If you don't catch errors — whether they're yours or the bank's — you can overdraft, miss fraud, or lose track of money you thought you had. A reconciliation takes 15 to 45 minutes and catches most problems before they become expensive.
Key Takeaways
- A bank reconciliation compares your records to your bank statement and explains every difference between the two.
- Most differences are timing issues: checks that haven't cleared, deposits the bank hasn't posted yet, or fees you didn't know about.
- You need your bank statement, your checkbook or transaction register, and a way to track which items have cleared — a spreadsheet, your bank's app, or paper and pencil.
- If your reconciliation doesn't balance after you've checked your math, contact your bank to report the discrepancy and ask them to investigate.
Gather your statement and your records
Pull your most recent bank statement — either from your email, your bank's website, or the paper copy that arrived in the mail. You'll also need your own records: a checkbook register, a spreadsheet where you track transactions, or screenshots from your banking app showing what you recorded.
Make sure both documents cover the same time period. A bank statement usually covers one month, from the statement date to the closing date. Your records should cover at least that same period, though it's easier if you have a few days before and after to catch timing differences.
List what the bank says you have
Start with the opening balance on your bank statement — the amount you had at the start of the statement period. Write it down. Then add every deposit the bank shows, and subtract every withdrawal, fee, or charge. The number you end up with is your bank balance.
You don't need to verify each transaction yet. You're just calculating what the bank says your balance is right now. If your statement shows an opening balance of $500, deposits totaling $1,200, and withdrawals totaling $800, your bank balance is $900.
List what you recorded
Now do the same thing with your own records. Start with the balance you recorded at the beginning of the statement period. Add every deposit you wrote down, subtract every check you wrote and every withdrawal you made. The number you end up with is your book balance — what your records say you have.
Again, don't worry about matching the bank yet. You're just calculating what your own records show. If your register shows an opening balance of $500, deposits you recorded of $1,200, and withdrawals you recorded of $750, your book balance is $950.
Find the difference and identify timing issues
If your bank balance and book balance match, you're done — your account is reconciled. If they don't, subtract the smaller number from the larger one. In the example above, $950 minus $900 equals $50. That's the gap you need to explain.
Go through your bank statement line by line and check off each transaction against your records. Look for:
- Checks you wrote that haven't cleared yet. If you wrote a check but the bank hasn't deducted it, it won't show on the statement. Add it back to your bank balance.
- Deposits you recorded but the bank hasn't posted. If you deposited money but it hasn't appeared on the statement, subtract it from your bank balance.
- Bank fees or charges you didn't record. If the bank charged you a fee, subtract it from your book balance to match the bank.
- Interest or credits the bank added. If the bank paid you interest, add it to your book balance.
- Transactions the bank shows that you didn't record. This could be an automatic payment, a debit card charge, or an error. Add or subtract it from your book balance as needed.
Adjust both sides until they match
Create a simple worksheet with two columns: one for adjustments to your bank balance, one for adjustments to your book balance. For each difference you found, write down what it is and which side it affects.
For example, if you wrote a check for $50 that hasn't cleared, add $50 back to your bank balance. If the bank charged you a $5 fee you didn't record, subtract $5 from your book balance. Keep adjusting until both sides equal the same number.
Once they match, update your records. Write down any fees or charges you missed, record any automatic payments you didn't know about, and remove any checks from your register that have now cleared. Your book balance should now match your bank balance exactly.
What to do if the numbers still don't match
If you've checked your math twice and the balances still don't match, look for a transaction that's twice the size of your remaining difference. A common mistake is recording a deposit as a withdrawal or vice versa — that creates a gap that's double the amount. For example, if you recorded a $100 deposit as a $100 withdrawal, your book balance will be $200 off.
If you still can't find the problem, contact your bank. Tell them your statement balance and your book balance, and ask them to review the statement for errors. Bring your records with you or be ready to describe specific transactions. The bank can investigate unauthorized charges, duplicate transactions, or posting errors on their end.
Frequently Asked Questions
How often should I reconcile my bank account?
Most people reconcile monthly, when the statement arrives. If you write many checks or make frequent transfers, reconciling weekly or every two weeks catches problems faster. The more often you do it, the fewer transactions you have to track, so it takes less time.
What if a check I wrote months ago still hasn't cleared?
A check that's been outstanding for more than 60 days is unusual and worth investigating. Contact the person or business you wrote it to and ask if they received it. If they did but haven't cashed it, ask them to do so. If they didn't, you may need to stop payment on the check and issue a new one. Once you confirm the check won't clear, remove it from your reconciliation.
Can I reconcile using my bank's app instead of a statement?
Yes. Most banking apps show your transactions in real time and let you mark them as cleared. The process is the same: compare what the app shows to what you recorded, find the differences, and adjust. Some apps have a built-in reconciliation tool that does the math for you.
What if the bank made an error?
If you find a transaction on the statement that you didn't make, or a charge that's wrong, contact your bank immediately. Describe the transaction, explain why it's wrong, and ask them to investigate. The bank will review it and either correct it or explain why it's correct. Keep records of your complaint and their response.
Do I need to reconcile if I only use my debit card?
Yes. Debit card transactions can take several days to post, and fraud can happen on debit cards just like credit cards. Reconciling catches unauthorized charges and timing delays. It also helps you spot if a transaction posted twice by mistake.