What reconciliation means and why you do it
Reconciliation is the process of comparing your personal record of transactions against your bank's record to make sure they match. You're looking for two things: transactions the bank shows that you haven't recorded yet, and transactions you recorded that the bank hasn't processed yet. The goal is to know your actual available balance—not what you think you have, but what the bank will actually let you spend.
Most people reconcile monthly, usually when their bank statement arrives. Some banks send statements on paper; most now send them by email or let you view them online. The statement covers a specific date range—typically the first through the last day of the month, though some banks use different cycles.
You reconcile because small errors compound. A forgotten check, a duplicate charge you didn't catch, or a fee you didn't know about can throw off your balance by hundreds of dollars. If you don't reconcile, you might think you have money to spend when you don't, and overdraft fees follow.
Key Takeaways
- Reconciliation compares what you recorded in your checkbook or banking app against what your bank statement shows, to catch errors and missing transactions on either side.
- Start by listing all transactions you made during the statement period, then cross off the ones that appear on the bank statement.
- Outstanding checks and pending deposits are normal—they're transactions you recorded that haven't cleared yet—and you account for them separately.
- If your balance doesn't match after accounting for outstanding items, look for duplicate charges, transposed numbers, or fees you missed.
- Most banks now offer a reconciliation tool in their online banking portal that does much of this work for you.
Gather your statement and your records
Pull your most recent bank statement and your checkbook register, banking app, or whatever record you keep of your transactions. If you use online banking, you can usually read a PDF of your statement or view it directly in the app. Write down the statement period—the "as of" date matters, because transactions that clear after that date won't appear on this statement.
You'll also need to know your starting balance for the period. This is the ending balance from your previous statement, and it should appear at the top of your current statement. If this is your first reconciliation, use your opening balance when you opened the account.
List transactions you made but the bank hasn't shown yet
These are called outstanding items. The most common is an outstanding check—a check you wrote and recorded in your register, but the person you gave it to hasn't deposited it yet, so it doesn't appear on your bank statement. You might also have a pending deposit: money you deposited but that hasn't cleared yet, or a transfer you initiated that's still processing.
Go through your checkbook or transaction history and find every transaction dated on or before the statement end date that does not appear on the bank statement. Write down the check number (or transaction ID) and the amount. These are your outstanding items.
Some banks show pending transactions separately in online banking—transactions that have been authorized but haven't fully cleared. These are not the same as outstanding checks. A pending transaction is already in the bank's system; an outstanding check is not. Don't double-count them.
Work through the reconciliation formula
The bank reconciliation formula is straightforward:
Bank statement balance + deposits not yet shown − outstanding checks = your checkbook balance
Start with the ending balance on your bank statement. Add any deposits you made that don't appear on the statement yet. Subtract any checks you wrote that don't appear on the statement yet. The number you get should match the balance in your checkbook or app.
Here's a concrete example. Your bank statement shows an ending balance of $2,500. You deposited a check on the last day of the month for $300, but it hasn't cleared yet. You wrote a check for $150 that hasn't been cashed. Your calculation is: $2,500 + $300 − $150 = $2,650. Your checkbook should show $2,650.
Find and fix discrepancies
If your numbers don't match, start by checking your arithmetic. Then look for these common causes: a transaction you recorded twice, a transaction you recorded but the bank didn't (or vice versa), a number you transposed (writing $51 instead of $15), or a bank fee or interest deposit you didn't record.
Go line by line through your register and check off each transaction as it appears on the bank statement. Anything in your register that isn't on the statement is either outstanding (which you've already accounted for) or an error. Anything on the statement that isn't in your register is either a fee, interest, or a transaction you forgot to record.
Bank fees are common culprits. Monthly maintenance fees, overdraft fees, ATM fees, and wire transfer fees all appear on your statement but might not be in your register if you weren't expecting them. Interest deposits (usually small) also show up on statements but are straightforward to miss. Add these to your register, then recalculate.
If you still can't find the error and the difference is small, check whether you made a math error in your register itself. Add up a few recent transactions by hand to verify. If the difference is large or you can't locate it after 15 minutes of checking, contact your bank—they can walk you through their transactions and help you spot what's missing.
Use your bank's online reconciliation tool
Most banks now build reconciliation into their online banking platform. Log in, find the statement or account history section, and look for a "reconcile" or "match transactions" button. The tool will show you transactions from the statement and let you check them off as you review your own records. Some tools automatically match transactions for you based on amount and date.
These tools don't eliminate the need to review—you still have to look at each transaction and confirm it's legitimate—but they do the arithmetic for you and flag anything that doesn't match. If your bank offers this feature, it's faster and less error-prone than doing it by hand.
Record the reconciliation and move forward
Once your numbers match, write the reconciliation date in your checkbook or make a note in your banking app. Some people write "reconciled" next to the statement balance; others keep a separate reconciliation log. The point is to have a record that you checked it and it balanced.
If you found errors—a fee you didn't know about, a duplicate charge, or a transaction that shouldn't have happened—address them now. If a fee was wrong, contact the bank. If a charge was fraudulent, report it. If you straightforward forgot to record something, add it to your register so your next reconciliation is accurate.
Going forward, reconcile every month when your statement arrives. The longer you wait between reconciliations, the harder it is to remember what happened and spot errors. Monthly reconciliation takes 10 to 20 minutes if you've kept decent records, and it catches problems before they become expensive.
Frequently Asked Questions
What if I can't find an outstanding check after several months?
If a check hasn't cleared after 60 to 90 days, it's probably lost or the recipient never deposited it. Contact the person you gave it to and ask if they received it. If they didn't, you can stop accounting for it in your reconciliation and adjust your register. Some banks will let you issue a replacement check or process a refund.
Do I need to reconcile if I use online banking and can see all my transactions?
Yes. Online banking shows you what the bank has processed, but it doesn't catch your own errors—duplicate entries, wrong amounts you typed, or transactions you forgot to record. Reconciliation is your check on yourself, not just on the bank. It also catches unauthorized charges faster.
What's the difference between pending and outstanding?
A pending transaction is one the bank has already received and is processing—it's in their system but hasn't fully cleared yet. An outstanding check is one you wrote that the bank hasn't received yet. Pending transactions usually clear within one to three business days. Outstanding checks can take longer, depending on when the recipient deposits them.
Can I reconcile on my phone?
Yes, if your bank's app has a reconciliation feature. You can also do it manually by taking a screenshot of your statement and checking off transactions in your app as you go. It's slower than using a computer, but it works if that's what you have available.
What if the bank made an error, not me?
If you've reconciled carefully and your numbers still don't match, and you've found a transaction on the statement that you didn't authorize or that's the wrong amount, contact your bank with the statement and the transaction details. Banks can reverse charges and correct errors, but they need documentation. The sooner you report it, the faster they can investigate.