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Case study: untangling 14 months of unreconciled books

A walkthrough of the process used to reconcile a substantial bookkeeping backlog, from statement gathering to a clean, current set of books.

Where this kind of engagement usually starts

Requests like this typically begin the same way: a business owner realizes the books haven’t been touched in a while — sometimes a few months, sometimes well over a year — and reporting, filing, or a lender request has made that gap impossible to ignore. There’s no judgment in that starting point; multi-month backlogs are one of the more common reasons a business reaches out for bookkeeping help.

The first conversation is mostly about understanding the shape of the problem: which accounting software is in use, how many bank and card accounts are involved, roughly how far back the last reconciled statement goes, and what reporting or filing deadline (if any) is driving the timeline.

Scoping the backlog before touching a single transaction

Before any cleanup work begins, the engagement is scoped: which accounts and entities are in scope, which reporting periods need to be reconciled, what access is required, and what the fees and timeline look like for that specific volume of work. Nothing is opened or edited until scope, inputs, and fees are agreed — the same principle that applies across every service line here, not just cleanup projects.

Before cleanup work begins

What we needed from the client

  • Bank and credit card statements covering the full unreconciled period
  • Access to the accounting software file, at the level agreed for the engagement
  • Any prior tax filings or year-end summaries already on hand
  • One point of contact available for questions while cleanup is underway
  • Written confirmation of which accounts and periods were in scope

Sorting and categorizing: the cleanup phase

With scope confirmed, the work usually moves through the books chronologically. Transactions are reviewed against the chart of accounts, miscategorized entries are flagged, and duplicate or unclear items are set aside for the client to confirm rather than guessed at. A backlog this size often surfaces a handful of judgment calls — a mixed personal/business charge, an unclear transfer between accounts — and those get resolved with the client directly, not assumed.

This phase is usually the most time-intensive part of the process, simply because of the volume of transactions involved rather than any single complication.

Reconciling accounts, one statement at a time

Reconciliation is done period by period: each month’s register is compared against the corresponding bank or card statement, discrepancies are traced, and adjusting entries are documented as they’re made. Working in order — rather than jumping around — keeps a clear trail of what changed and why, which matters if a filing or lender review later asks about a specific period.

Typical phases at a glance
Phase What it focuses on Illustrative duration
Intake & scoping Confirm records on hand, timeframe, access, and fees 1–2 weeks
Categorization & cleanup Sort transactions, flag exceptions for the client to confirm Varies with volume
Reconciliation Match books to statements, period by period Varies with volume
Review & handover Client review, then transition to ongoing bookkeeping 1–2 weeks

Durations above are illustrative only — a general sense of sequencing, not a quote, estimate, or commitment for any specific engagement.

Handing off into ongoing bookkeeping

Once every period is reconciled, the client reviews the cleaned-up books before anything is treated as final. From there, the engagement typically transitions into a regular bookkeeping cadence — monthly categorization and reconciliation going forward — so the business doesn’t drift back into a backlog. Documentation from the cleanup (what was adjusted, and why) is left with the client’s file as a reference.

This kind of project is rarely just about the past 14 months — the more durable value is usually the routine put in place afterward.

Important limitations

This case study describes a general process only. Details have been generalized and anonymized, and nothing above should be read as describing a specific, identifiable client or engagement.

The Accounts Hub provides bookkeeping, accounting, tax-preparation, payroll-tax, business-formation, and compliance-coordination support within confirmed scope — not legal representation, investment advice, or independent audit and assurance services. Timelines, phases, and fees vary by engagement and are agreed before work begins; nothing here guarantees a particular outcome, timeline, or result.

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