Check the arithmetic of a credit card statement using its posted totals. Enter the previous balance, new charges, payments, credits, fees and interest, then compare the calculated ending balance with the new balance printed on the statement. This is a statement balance check, with balances owed entered as positive amounts. Use the actual posted interest charge. The tool does not estimate interest from an APR or decide whether a transaction is authorized.
Statement comparison worksheet
| Statement category | How to use it |
|---|---|
| Previous balance | Start with the prior statement total |
| Payments and credits | Subtract posted reductions |
| Purchases and advances | Add posted new charges |
| Fees and interest | Add charges not included elsewhere |
| New balance | Compare calculated and printed totals |
Method based on Federal Reserve ending-balance instructions and NCUA statement guidance. Enter your own statement amounts.
How it works
Difference = expected new balance - statement new balance.
Method source: Federal Reserve ending-balance instructions. Amounts are calculated in whole cents. The tool reports the arithmetic of your inputs and does not update your records.
Copy totals from the same billing period
Begin with the previous balance and new balance printed on a single statement. Copy the totals for transactions posted within that statement period into the other fields. The National Credit Union Administration describes the transactions section as including purchases, payments, credits, cash advances and balance transfers. Use that list to check which amounts belong in the new charges and reduction fields.
Enter purchases, advances and transfers in as new charges, with fees and interest excluded when you enter them separately. Enter payments and credits as positive amounts because the calculator subtracts those fields. A negative previous balance or new statement balance can be entered when the statement shows a credit balance. Confirm the sign convention against the original statement before comparing totals.
Use the actual interest charge
The tool adds the interest amount you supply. It does not use a rate, daily balance or projected payment date to estimate the charge. Copy the interest total shown for the statement period and check that it has not also been included in new charges. NCUA guidance explains that fees and interest charges are listed separately on the monthly bill.
The Federal Reserve's reporting instructions describe an ending balance as the previous balance less payments and credits, plus new purchases and advances and finance charges. This tool applies that balance roll-forward and provides a separate fees field to match the statement categories. Follow the statement breakdown carefully when charges contain multiple types of activity, so the same fee is not counted twice.
Read a mismatch as an arithmetic question
The result compares the expected ending balance with the new statement balance you entered. A positive difference means the calculated amount is higher. A negative difference means it is lower. Check the copied totals, signs and period cutoff before investigating individual transactions. Look for payments or credits entered twice, a missing charge category or an amount entered with the wrong decimal placement.
A matching result establishes only that these totals agree arithmetically. Review the transaction list itself for items you do not recognize, and retain the receipts or records that explain each business charge. The calculator cannot verify a merchant, confirm a payment has posted or decide whether a charge is legitimate. It also does not reconcile a separate business liability ledger with the card account.
Keep the comparison
Export CSV for the supplied totals, calculated balance and difference. Print the worksheet with the statement when you need a paper comparison. Use generic descriptions in your own notes rather than placing card numbers in this tool. Browser-only saving restores the current figures on the same device; clear the worksheet after saving your copy if you want to start another statement.
Questions about this tool
Does this calculate interest from an APR?
No. Enter the interest charge posted on the statement. This tool checks the balance roll-forward using statement totals.
Does a match confirm all charges are correct?
A match confirms the arithmetic of the totals you entered. Review the transaction list and your supporting records as well.
Official sources
- Federal Reserve: FR 2835a instructions, ending-balance calculation
- NCUA: reading credit card statements
Data as of 2026-10-05. Published illustrations are static teaching cases, not live account data.