Set up the Reconciliation Skill and reconcile accounts

What the Reconciliation skill does

The Reconciliation skill is part of Anthropic's official knowledge-work-plugins collection, a set of profession-specific skills for Claude built around concrete job functions. Reconciliation in finance means comparing two independently maintained sets of figures, such as the general ledger and a subledger, or a bank statement and the accounting records, to confirm they actually agree. Per the provider, the skill supports three core reconciliation types: general-ledger-to-subledger reconciliations, classic bank reconciliations, and intercompany reconciliations between related entities. For newcomers it helps to know the vocabulary: a control account in the general ledger holds summary totals, while the subledger, such as an accounts-receivable listing, holds the individual line items. When the two don't match, a difference exists that needs to be explained.

Prerequisites for using it

To use the skill meaningfully you need access to Claude with skills enabled, plus the data sources you want to compare, for example a bank statement as a file or pasted text and an extract from the accounting system. The skill itself does not connect to a bank or accounting system; it processes whatever data is supplied in the conversation or as an attachment. Basic bookkeeping knowledge makes interpreting the results easier but is not strictly required, since the skill brings the terminology and standard formats along. It's also important that sensitive financial data only be processed in an environment that complies with internal data-protection policy, since account balances and posting details are confidential information.

How a reconciliation runs

For a bank reconciliation, the skill compares the balance per the bank statement to the cash account in the general ledger. It identifies outstanding checks, deposits not yet credited by the bank, and bank fees or interest not yet recorded on either side. The process ends with an adjusted balance on both sides that ideally converges to zero difference. For a general-ledger-to-subledger reconciliation, covering accounts such as receivables, payables, fixed assets, or prepaid expenses, the summary level of the general ledger is compared against the detail level of the subledger. Typical causes of differences include manual journal entries not reflected in the subledger, timing differences in posting, or interface errors between systems. For intercompany reconciliation, receivable and payable balances between related entities are compared so they net to zero on consolidation.

Categorizing differences

A particularly practical feature is how the skill classifies the differences it finds. Timing differences such as outstanding checks or deposits in transit typically clear on their own within a few business days and need no correcting entry. Items requiring an adjustment, such as unrecorded bank charges, posting errors, or duplicate entries, lead to a suggested correcting journal entry. A third category covers items that genuinely require investigation, such as disputed amounts or recurring, unexplained differences. The skill also provides an aging analysis of outstanding items with clear time buckets: items up to thirty days are considered normal, while items over ninety days should be escalated. This structure helps teams set priorities instead of treating every difference the same way.

Best practices and limitations

The skill emphasizes several practical principles: reconciliations should be completed close to the monthly close, every reconciliation should be documented with preparer, reviewer, and an explanation of reconciling items, and the person performing the reconciliation should not be the same person who originally recorded the transactions in that account. This segregation of duties prevents errors or manipulation from going unnoticed. Importantly, per the provider the skill does not replace professional sign-off. All results should be reviewed by qualified financial professionals before final approval. In other words, the skill delivers structured support and methodology rather than an automated accounting decision. For organizations with high transaction volumes it can significantly shorten the manual groundwork, but it does not replace the internal control environment, approval workflows, or the accountability of financial reporting.

Practical value in daily work

For finance teams running recurring monthly reconciliations, the skill's main benefit is consistency: it applies fixed formats and repeatable review steps so different preparers arrive at comparable results. That reduces onboarding time for new team members and makes reconciliation output easier for auditors to follow. For organizations operating internationally with many subsidiaries, the structured approach to intercompany reconciliation is particularly useful for systematically surfacing recurring error sources, such as differing exchange rates or cut-off date mismatches, instead of rediscovering them every quarter.