Evidence-first money workflow · Personal Money
Credit Card Statement Payoff Reconciler
Rebuild consecutive credit card closing balances from purchases, fees, interest, payments, and credits, then expose arithmetic and chain mismatches.
- 1Prepare
- 2Analyze
- 3Review and export
Prepare the evidence
Paste the documented CSV schema or choose a local CSV file. Nothing is sent to Nirmion.
Review the analysis
Summary metrics lead back to the rows that support them.
Method and interpretation
How to use Credit Card Statement Payoff Reconciler
Use this reconciler when a payoff tracker, personal ledger, or downloaded statement series does not agree with the issuer’s closing balance. Rather than comparing only two totals, it reconstructs every month and checks whether the next opening balance continues from the prior reported closing balance. That separates arithmetic differences inside a statement from missing or changed evidence between statements.
Prepare the input
Create one row per statement month with opening balance, purchases, fees, interest, payments, credits, and reported closing balance. Enter payments and credits as positive amounts because the formula subtracts them. Keep fees and interest separate. Use statement-cycle months consistently even when a cycle begins or ends outside the calendar month, and do not mix pending transactions with posted statement values.
Check the worked example
The example begins at USD 1,000, adds purchases and interest, subtracts a payment, and closes at USD 1,120. The next two statements continue from the prior closing value and reconcile after fees, payments, and credits. Editing one closing balance will also cause the following opening-link check to show where continuity broke.
Read the evidence
A statement difference compares the reported close with the reconstructed close. An opening-chain difference compares the current opening with the previous reported closing. A row can have one or both issues. Review total fees and interest separately from purchases, then return to the original statement for posting dates, chargebacks, balance transfers, adjustments, or categories omitted from the CSV.
Calculation method
Calculated closing = opening balance + purchases + fees + interest − payments − credits. Statement difference = reported closing − calculated closing. Opening-chain difference = current opening − prior reported closing. Every value is parsed to exact minor units; no interest is estimated in this tool.
Questions this workflow helps answer
Use these questions to confirm that this tool matches the task you need to complete.
- How can I reconcile a credit card statement closing balance month by month?
- Which purchases, fees, interest, payments, or credits explain a card balance mismatch?
- Why does one statement opening balance differ from the previous statement closing balance?
Limits and decision boundary
A reconciled summary proves only that the entered aggregates add up. It does not confirm transaction authorization, payment timeliness, interest accuracy, minimum-payment compliance, or the completeness of the statement. Balance transfers and cash advances may need separate source notes before aggregation.
Common mistake
Do not enter refunds as negative purchases and again as positive credits. Choose the statement’s own grouping once so the bridge does not subtract the same adjustment twice.
Your pasted values and selected CSV files are processed in this browser tab. This workflow does not connect to a bank, save a budget, or provide financial, tax, legal, or investment advice.
Questions about this workflow
Why does the arithmetic reconcile but the opening chain fail?
The current statement may start from a different amount than the prior reported close because a statement is missing, a correction posted between extracts, or one value was copied incorrectly.
Should payments be negative?
No. Enter a positive payment amount. The documented formula subtracts payments and credits from the amount owed.
Can this identify an unauthorized purchase?
No. It works with monthly aggregates. Review transaction-level statement evidence and contact the issuer through its supported dispute process.