What bank reconciliation is and why you do it
Bank reconciliation is the process of comparing your own records of money in and out of your account against what your bank says you have. You do it to catch errors — yours, the bank's, or both — before they compound into bigger problems. It also catches fraudulent transactions and unauthorized withdrawals.
The core idea is straightforward: your checkbook (or spreadsheet, or banking app) should match your bank statement. When they don't, reconciliation is how you find out why and fix it. Most people reconcile monthly, when the statement arrives, though you can do it more often if you move money frequently.
Banks make mistakes. You make mistakes. Checks take days to clear. Deposits post at different times than you record them. Reconciliation is the tool that keeps all of this from turning into a mess where you think you have money you don't actually have, or miss fraudulent charges until it's too late.
Key Takeaways
- Reconciliation means comparing your records to your bank statement line by line to find where they differ.
- Start by listing all transactions you recorded, then mark off each one as you find it on the bank statement.
- Outstanding checks and deposits in transit are normal reasons your balance won't match — account for them separately.
- If your records and the bank statement still don't match after accounting for timing, look for duplicate charges, reversed transactions, or math errors.
- A monthly reconciliation takes 15 to 45 minutes depending on how many transactions you have and how organized your records are.
Gather your documents and set up your workspace
You need two things: your bank statement (the one the bank sent you, either by mail or email) and your own records of what you've spent and deposited. Your records might be a checkbook register, a spreadsheet, or a transaction list from your banking app — whatever you've been using to track money in and out.
Open both side by side. If you're working on paper, use a blank sheet to write down the bank's ending balance and your ending balance. If you're using a spreadsheet or app, create columns for the transaction date, description, amount, and a checkbox for "cleared." The checkbox is how you'll track which transactions you've matched.
Make sure you're looking at the same time period. Your bank statement covers a specific date range — usually the first through the last day of the month. Your records should cover the same dates. If you're reconciling mid-month, use the statement dates, not the calendar month.
Match transactions line by line
Start with your bank statement. Go through each transaction the bank lists and find it in your records. When you find a match, mark it off in both places — check a box, cross it out, or highlight it. The key is that you can see at a glance which transactions you've already matched.
Watch for timing differences. A check you wrote on the 5th might not show up on the bank statement until the 12th. A deposit you made on the 28th might not post until the 1st of the next month. These are normal. Don't mark them as matched yet — they belong in a separate list called "outstanding items."
As you work through the statement, you'll probably find transactions in your records that haven't hit the bank yet, and transactions on the bank statement that you didn't record. Write down the ones that haven't cleared. These are your outstanding checks, pending deposits, and transfers in progress.
Account for outstanding checks and deposits in transit
An outstanding check is one you wrote and recorded, but the bank hasn't cleared it yet. A deposit in transit is money you deposited and recorded, but the bank hasn't posted it. Both are normal. They explain why your balance and the bank's balance don't match, and they're temporary — they'll clear within a few days.
Create a separate list of these items. Write down the check number or deposit date, the amount, and the date you recorded it. Add up all the outstanding checks (these reduce your balance) and all the deposits in transit (these increase your balance). This is your adjustment calculation.
The formula is: Your recorded balance minus outstanding checks plus deposits in transit should equal the bank's statement balance. If it does, you're done. If it doesn't, something else is wrong and you need to look harder.
Find and fix discrepancies
If your adjusted balance doesn't match the bank's balance, start by checking your math. Add up your deposits and withdrawals again. Add up the bank's deposits and withdrawals. A straightforward arithmetic error is the most common reason reconciliation fails.
Next, look for transactions that appear on the bank statement but not in your records. These might be fees, interest, automatic payments you forgot about, or fraudulent charges. Write them down. If they're legitimate, add them to your records. If they're not, contact the bank.
Then look the other way: transactions in your records that don't appear on the bank statement and aren't on your outstanding list. These might be checks that bounced, deposits that were rejected, or transactions you recorded but never actually completed. Call the bank or check your app to find out what happened.
Finally, look for duplicate charges — the same amount on the same day twice. Look for reversed transactions (a charge followed by a credit for the same amount). Look for amounts that are close but not exact to what you recorded. These are straightforward to miss but common.
Update your records and document the reconciliation
Once you've found all the discrepancies and understand them, update your records. Add any transactions the bank posted that you didn't know about. Remove any transactions that bounced or were reversed. Correct any amounts you recorded wrong.
Write down the date you did the reconciliation, the statement period it covers, and the final balanced amount. Keep this record — it's proof that you checked your account and it matched. If a dispute comes up later, you'll have documentation that the account was correct on that date.
If you're using a banking app or online banking portal, many of them have a built-in reconciliation tool. You can mark transactions as cleared directly in the app, and it will calculate the difference for you. Use it if it's available — it's faster and less error-prone than doing it by hand.
What to do if you can't find the difference
If you've checked your math, accounted for outstanding items, and looked for duplicates and errors but the numbers still don't match, the difference is usually small. Write down the amount that's missing or extra. Sometimes it's a transaction you recorded wrong by one digit, or a fee you didn't see.
Go back through the last two weeks of transactions on both sides. Look at every amount. Compare dates carefully — a transaction on the 30th of one month might look like it should be on the 1st of the next. Check whether any transactions appear twice in your records by accident.
If the difference is very small (under $5) and you've spent more than 30 minutes looking, it may be worth calling the bank to ask if they see anything unusual. Describe the difference and the time period. They can sometimes spot errors in their own system that aren't obvious from the statement.
Frequently Asked Questions
How often should I reconcile my account?
Monthly is standard — most banks send statements monthly and that's when you have the most complete picture. If you use online banking and check your account frequently, you can reconcile more often. Some people do it weekly. The more often you reconcile, the easier it is because there are fewer transactions to track.
What if I find a fraudulent charge during reconciliation?
Contact your bank when ready. Most banks have a fraud department and a process for disputing unauthorized charges. You'll need to describe the transaction, the date, and the amount. Having done a reconciliation means you can point to exactly when you discovered it, which helps the bank's investigation.
Do I need to reconcile if I use online banking and check my balance every day?
Checking your balance and reconciling are different things. Your balance tells you how much money is in the account right now. Reconciliation tells you whether every transaction is accounted for and correct. You can have the right balance but still have errors — a duplicate charge, a fee you didn't know about, or a fraudulent transaction. Reconciliation catches these.
What's the difference between my balance and the bank's balance?
Your balance is what you think you have based on your records. The bank's balance is what they say you have based on theirs. They differ because of timing — checks you wrote that haven't cleared yet, deposits you made that haven't posted yet, and fees or interest the bank posted that you haven't recorded yet. Reconciliation explains these differences.
Can I reconcile on my phone?
Yes, if your bank's app has a reconciliation feature or if you use accounting software that syncs with your bank. You can also do it manually by taking screenshots of your statement and your transaction list, then comparing them. It's slower than a computer, but it works if that's what you have available.