What bank reconciliation is and why you do it
Bank reconciliation is the process of comparing your personal records of transactions against the official record your bank keeps. You do this to catch errors—either yours or the bank's—and to spot unauthorized transactions or fraud before they become bigger problems.
Your bank statement shows what the bank recorded. Your checking account register (or the transaction list in your banking app) shows what you recorded. These two lists rarely match on the same day because of timing: a check you wrote may not have cleared yet, a deposit you made might not have posted, or a transaction might have processed on a different date than you expected. Reconciliation explains those differences and confirms your actual balance.
Most people reconcile monthly, when the bank statement arrives. If you bank online, you can reconcile more often—weekly or even daily—because you see transactions as they post. The goal is the same either way: make sure the money you think you have is actually there, and catch anything that shouldn't be.
Key Takeaways
- Reconciliation compares your transaction records to your bank statement to find timing differences and errors.
- Start with your bank statement balance, add deposits not yet posted, subtract checks or transfers not yet cleared, and compare the result to your register balance.
- Timing differences—checks that haven't cleared, deposits that haven't posted—are normal and expected.
- If your adjusted balances don't match, look for duplicate entries, transposed numbers, or fees you forgot to record.
- Once balanced, update your register with any bank fees or interest you didn't know about, then move forward with the correct balance.
Gather your statement and your records
Pull your bank statement—either the paper version or download it from your online banking portal. You need the statement that covers a full month, from the opening date to the closing date printed on it. Note the opening balance (what you started with) and the closing balance (what the bank says you have now).
Open your checking account register—the record you keep of every transaction you make. This might be a physical notebook, a spreadsheet, or the transaction history in your banking app. You need to see every deposit, check, debit card purchase, transfer, and fee you recorded during that same month.
Have a pen and paper or a blank spreadsheet ready. You will be writing down numbers and doing simple math, so a clear workspace helps.
List outstanding checks and pending deposits
Go through your register and find every check you wrote that does not appear on the bank statement. These are outstanding checks—they have left your hands but haven't cleared the bank yet. Write down the check number and the amount for each one.
Next, find every deposit you recorded that is not on the bank statement. These are deposits in transit—you handed them over or submitted them electronically, but the bank hasn't posted them yet. Write down the date and amount for each one.
This list is crucial because it explains why your register balance and your bank statement balance don't match. The bank doesn't know about these transactions yet, so it wouldn't include them in the closing balance.
Calculate your adjusted bank statement balance
Start with the closing balance shown on your bank statement. Add all the deposits in transit (the ones you recorded but the bank hasn't posted yet). Then subtract all the outstanding checks (the ones you wrote but the bank hasn't cleared yet). The result is your adjusted bank balance.
Here is a simple example:
| Bank statement closing balance | $2,450.00 |
| Plus: Deposits in transit | + $300.00 |
| Minus: Outstanding checks | − $175.00 |
| Adjusted bank balance | $2,575.00 |
Write this number down. This is what your balance should be once all pending transactions clear.
Calculate your adjusted register balance
Now look at your register. Find the balance you recorded at the end of the month (or today, if you are reconciling as you go). This is your register balance.
Check your register against the bank statement for any transactions the bank recorded that you did not. Common ones are monthly fees, overdraft charges, interest earned, or automatic payments you forgot to write down. Subtract any fees or charges from your register balance. Add any interest or credits.
The result is your adjusted register balance. This should now match your adjusted bank balance.
Match the two adjusted balances
If your adjusted bank balance equals your adjusted register balance, you are done. The accounts reconcile, and you know your actual balance is correct.
If they do not match, look for the difference. Common causes are a transposed number (writing 54 instead of 45), a duplicate entry (recording the same transaction twice), a fee or deposit you missed, or a math error. Go through both lists line by line and check amounts against dates.
If the difference is small—a few dollars—it might be a rounding error or a fee posted on a date you didn't expect. If the difference is large or you cannot find it, contact your bank and ask them to walk you through the transactions from that month. They can see exactly what posted and when.
Update your register and keep the statement
Once the accounts balance, write down any fees, interest, or other bank charges you found during reconciliation but had not yet recorded in your register. Update your register balance to match the adjusted balance you calculated. This is now your true, verified balance.
Keep the bank statement and your reconciliation notes together for at least one year. If a dispute arises later—a charge you don't recognize, a check that bounced, a transfer that went to the wrong place—you will have the documentation to prove what happened and when.
Going forward, record transactions in your register as close to the date they happen as possible. If you use online banking, check your account weekly to catch errors or fraud early. The sooner you spot a problem, the easier it is to fix.
Frequently Asked Questions
What if I can't find where the accounts don't match?
Start by checking the math on both sides—add up your outstanding checks and deposits in transit again, and recalculate both adjusted balances. Then compare the bank statement line by line to your register, looking for amounts that are close but not exact (a sign of a transposed number). If you still can't find it, call your bank with the statement in front of you and ask them to confirm each transaction posted correctly.
Do I have to reconcile every month?
Monthly is standard and catches problems quickly, but you can reconcile more often if you prefer. Many people check their account weekly online to spot fraud early. The important thing is doing it regularly enough that you notice if something is wrong before it becomes a bigger issue.
What counts as an outstanding check?
Any check you wrote and gave to someone (or mailed) that has not yet appeared on your bank statement. Once it clears and shows up on the statement, it is no longer outstanding. If a check is very old and never cleared, contact the recipient to see if they ever received it.
Can I reconcile using my banking app instead of a paper statement?
Yes. Most banking apps show your transactions as they post and let you mark them as cleared. The process is the same—you are still comparing what you recorded to what the bank recorded—but it happens in real time rather than once a month. Some apps have a built-in reconciliation tool that does the math for you.
What should I do if the bank made an error?
Contact your bank immediately with the statement, the transaction in question, and any supporting documents (a receipt, a confirmation email, a canceled check). The bank will investigate and correct the error, usually within one to two business days. Ask them to confirm the correction in writing.