What bank reconciliation is and why you do it

Bank reconciliation is the process of comparing your own record of money in and out of your account against the official record your bank sends you. You are checking that the two match — that every transaction you wrote down also appears on your statement, and that your running total of what you have is correct.

You do this because mistakes happen. You might have written a check that hasn't cleared yet. The bank might have charged a fee you forgot about. A deposit might not have posted. A transaction could be recorded twice by accident. Reconciliation catches these problems before they cause overdrafts or make you think you have money you don't actually have.

Most people reconcile monthly, using the statement the bank sends (or that you read online). It takes 30 minutes to an hour the first time, and faster once you know the routine.

Key Takeaways

  • Reconciliation means comparing your personal record of transactions against your bank statement to find differences.
  • Start by listing all the checks and transfers you made that the bank statement does not yet show, because they take time to clear.
  • Subtract those pending items from your bank statement balance to see what your account should actually show.
  • If that number matches your personal balance, you are reconciled; if not, look for duplicate entries, fees you missed, or deposits that didn't post.
  • Once you reconcile, update your personal records to include any bank fees or interest you had forgotten about.

Gather your statement and your records

You need two things: your bank statement (usually for the last month) and your own record of what you spent and deposited. Your record might be a checkbook register, a spreadsheet, a notebook, or entries in a banking app — whatever you have been using to track your money.

If you do not have a personal record yet, start one now. Write down every check number, every transfer, every deposit, and the date and amount. This is what you will compare against the bank statement going forward. If you use online banking, many banks let you read transactions into a spreadsheet, which makes the comparison easier.

List what you wrote but the bank hasn't processed yet

Some transactions take time to clear. A check you mailed might not reach the bank for a week or more. A transfer you initiated might not show up for a day or two. These are called outstanding items — things you recorded but the bank statement does not show yet.

Go through your personal record and list every check, transfer, or withdrawal that you know you made but that does not appear on your bank statement. Write down the check number (if it is a check), the date you made it, who it was to, and the amount. Do the same for any transfers you started but that have not posted yet.

Add up all these outstanding amounts. This is the total of money that is on its way out but not yet deducted from your bank balance.

Calculate what your balance should actually be

Take the balance shown on your bank statement. Subtract all the outstanding items you just listed. The result is what your account balance should be right now, accounting for money that is still in transit.

For example: your bank statement shows $2,500. You have three outstanding checks totaling $600. Your real balance is $2,500 minus $600, which is $1,900.

Now compare this number to your personal record. If your personal balance also shows $1,900, you are reconciled. If it does not match, you have found a discrepancy and need to look for the cause.

Find and fix differences

If your calculated balance does not match your personal record, something is missing or wrong. The most common causes are: a bank fee you did not record, interest the bank paid you, a deposit that did not post, a transaction the bank recorded twice, or an error in your arithmetic.

Go through your bank statement line by line and check off each transaction against your personal record. Look for anything on the statement that you did not write down — this is usually a fee, interest, or an automatic payment you forgot about. Add these to your personal record.

Then look for anything in your personal record that is not on the statement and is not an outstanding item. This might be a deposit that bounced, a transaction that failed, or something you recorded wrong. Call the bank or check your online account to find out what happened.

Once you have found and recorded all the missing pieces, recalculate. Your personal balance should now match your bank statement balance minus outstanding items.

Update your records with bank charges and interest

After you reconcile, your personal record should include everything the bank knows about. If the bank charged you a fee or paid you interest, write it down now so your record stays current.

This is important because your personal balance is only accurate if it includes everything. If you forget to record a $10 fee, your balance will be $10 too high, and you might think you can spend money you do not actually have.

Keep reconciling each month

Once you have reconciled once, do it again the next month. It gets faster because you are already in the habit of recording transactions, and you only have to look for new differences. Many people find that reconciling monthly prevents small errors from piling up into big problems.

If you use online banking and your bank offers automatic reconciliation tools, you can use those to speed up the process. But the basic idea stays the same: compare what you recorded to what the bank recorded, find the differences, and fix them.

Frequently Asked Questions

What if I find a transaction on my bank statement that I did not make?

Contact your bank right away. Unauthorized transactions are fraud, and banks have procedures to investigate and reverse them. Have your statement in front of you when you call, and be ready to describe the transaction in detail.

Do I have to reconcile if I use a banking app that shows my balance?

The app shows what the bank knows, but it does not catch your own errors — like a check you forgot to record or a deposit you thought went through but did not. Reconciling catches those. You can do it less often if you trust your app, but once a month is still a good habit.

What if my personal balance is higher than my bank balance minus outstanding items?

You have recorded money that the bank does not know about. Look for a deposit that did not post, a check that bounced, or a transaction you recorded twice. Call the bank if you cannot find it.

How long should I keep old bank statements?

Keep them for at least one year. If you need to dispute a transaction or prove you paid something, you may need the statement as proof. Some people keep them longer for tax or legal reasons.