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Forensic accounting

Financial records reconstruction

Short answer

Financial records reconstruction from Finbryn rebuilds a complete financial history from bank statements, invoices and whatever source documents survive, for a US dispute, investigation or insurance claim where the existing books cannot be relied on. Every assumption goes into a written log a court, counsel or an insurer can review line by line.

Management report

Illustrative client ยท August 2026

USD

Reviewed before sending
Profit and loss
LineAugJul
Revenue142,380131,904
Cost of sales(51,260)(48,115)
Gross profit91,12083,789
Payroll(46,300)(45,900)
SoftwareNoted(6,480)(5,490)
Rent(8,000)(8,000)
Other operating(9,215)(9,870)
Net income21,12514,529

Reviewer's note

Software is up on last month after two seats were added mid-month. Revenue includes one milestone invoice that will not repeat next month.

Illustrative. An example of the document, not a client's figures.

Sometimes there simply is no reliable set of books to start from. A prior bookkeeper left with the login credentials and no handover, the accounting software subscription lapsed and the file was never exported, or a small business never kept more than a shoebox of receipts in the first place. A dispute, an insurance claim, or an investigation still needs a financial record to run on, and reconstruction is how we build one where none reliably exists.

This is different from a routine catch-up bookkeeping project, where the goal is simply to get current-year books caught up to today so a return can be filed. Reconstruction is built to a higher evidentiary standard: every figure needs to be traceable to a document, and every place where no document survives needs to be flagged rather than quietly smoothed over. The output has to hold up if someone hostile to the result reads it line by line.

We start from bank and card statements, because they exist independently of whatever bookkeeping software was or was not used, and because a bank has no incentive to alter its own record of what cleared. From there we pull whatever invoices, contracts, vendor confirmations, and prior tax filings can still be gathered, and we match them against the transaction history the statements show, one line at a time.

Not every transaction can be fully documented, and we do not pretend otherwise. Where a gap remains after every reasonable source has been checked, it goes into an assumptions log stating exactly what we assumed and why, so a reader can weigh that specific figure differently from one that traces cleanly to an invoice. That log, more than the reconstructed books themselves, is usually what a court or an insurer scrutinizes hardest.

What is included

A reconstruction engagement covers the full period at issue, rebuilt transaction by transaction from whatever source documents survive. We deliver a reconstructed transaction history, a profit and loss statement and balance sheet for the period, and the assumptions log that documents every judgment call made along the way. Where the reconstruction needs to support a later tax filing, we build it to the standard a credentialed preparer can rely on, with the understanding that the preparer, not us, signs and files any resulting return.

We also include a document inventory listing exactly what survived and what did not, since that inventory is often the first thing an opposing party or an adjuster asks to see. If certain months or accounts have no surviving records at all, we say so plainly in the inventory rather than presenting a reconstructed figure that implies more documentation exists than actually does.

How the process works

We start with an intake conversation covering exactly what period and entity is at issue, what records the client believes still exist, and what deadline a court, insurer, or filing requires. From there we request bank and card statements directly from the institutions if the client's own copies are incomplete, since most banks will produce several years of statement history on request even after an account has closed.

Reconstruction proceeds statement by statement. Each transaction gets matched to a source document where one exists, an invoice, a contract, a vendor confirmation, or a prior filing, and coded into the rebuilt chart of accounts. Where no document exists, we look for a secondary source, such as a vendor's own records or a pattern in surrounding transactions, before falling back to a documented assumption.

Once the rebuild is complete, a senior reviewer reconciles the reconstructed books to bank totals for the period, and reviews both the financial statements and the assumptions log before delivery. We deliver on the timeline the matter requires and remain available to walk counsel, an adjuster, or a mediator through any specific line.

Who this is for

Reconstruction is engaged most often when a dispute or claim needs financial statements that do not currently exist in reliable form: a partner dispute where one side never saw the real books, a divorce where the family business's records are commingled or incomplete, an insurance claim where the policyholder's own accounting lapsed before the loss event, or a fraud investigation where the person who kept the books is no longer cooperating or no longer employed.

It is not the right service if your books mostly exist and just need to be brought current for this year's tax filing. Our regular catch-up and cleanup bookkeeping work covers that at a lower cost and without the assumptions-log discipline a dispute-grade reconstruction requires. Tell us upfront whether a court, an insurer, or a filing deadline is driving the request, since that changes both the standard we build to and the price.

Common problems we fix

The most common problem is a client who assumes reconstruction means guessing, and pushes back when we insist on documenting every assumption instead of just producing a clean-looking set of statements. We explain early that a reconstruction with an honest assumptions log survives scrutiny far better than one that looks polished but cannot answer a single hard question about where a number came from.

A second common problem is records scattered across five different systems: a defunct QuickBooks file, a box of paper invoices, a spreadsheet someone kept on the side, and years of bank statements in PDF form. We inventory everything first, before starting the rebuild, so we know what we are working with and do not discover a gap halfway through.

A third problem is a deadline that arrived before anyone realized how much documentation was actually missing. Where that happens, we tell the client immediately what a realistic timeline looks like given what survives, rather than promising a full rebuild by an unrealistic date and delivering something thin.

Software and integrations

The rebuilt books live in QuickBooks Online or Xero, whichever the client already uses or prefers going forward, so the reconstructed file is usable after the engagement ends and not locked into a proprietary format. Microsoft Excel handles the transaction-matching working papers and the assumptions log itself, since that log needs to be readable by a non-accountant reviewing it line by line.

Dext helps pull invoice and receipt data out of scanned paper documents faster than manual entry when a client hands us a physical box of records, and we scan and preserve the originals before working from the digitized copies. Where the underlying accounts had a prior QuickBooks or Xero file that still exists but is unreliable, we export whatever transaction history it retains as one more source to cross-check against the bank statements, rather than starting completely from zero.

What it costs

Reconstruction is quoted per engagement based on the number of periods, accounts, and entities involved, and on how much documentation survives versus needs to be requested from banks or third parties. A single tax year with reasonable bank records available costs meaningfully less than a multi-year reconstruction across several entities with significant gaps.

We give a written estimate after reviewing what documentation the client already has, and we flag upfront if the scope looks likely to grow once we start pulling bank statements and finding more accounts than the client initially remembered, which happens often enough that we build in a checkpoint before continuing past the original estimate.

How we measure quality

Every dollar figure in the reconstructed statements needs to trace to either a specific source document or a specific, dated entry in the assumptions log; there is no third category. Before delivery, a senior reviewer reconciles the rebuild against bank totals for the period, and reviews the assumptions log specifically for anywhere a judgment call was made without being written down.

We treat the assumptions log as the real deliverable, not a footnote. If a reader cannot tell, for any given figure, whether it came from a document or an estimate, the reconstruction has not met our standard yet, and it goes back for another pass before it ships.

How we work

The process

  1. 1

    Intake and inventory

    We confirm the period, entity, and deadline at issue, then inventory exactly what records the client already has before requesting anything further.

  2. 2

    Statement recovery

    Bank and card statements are requested directly from institutions where the client's own copies are incomplete, since most banks retain several years of history on request.

  3. 3

    Document matching

    Each transaction is matched to a source document where one exists, invoices, contracts, vendor confirmations, or prior filings, and coded into the rebuilt chart of accounts.

  4. 4

    Assumption logging

    Where no document survives, a documented assumption is recorded in a written log, stating exactly what was assumed and the basis for it.

  5. 5

    Reconciliation

    The rebuilt books are reconciled against bank totals for the period to confirm the reconstruction ties out before financial statements are drafted.

  6. 6

    Dual review

    A senior reviewer checks the reconciliation and matching, then reviews the financial statements and assumptions log before delivery.

  7. 7

    Delivery and walkthrough

    The reconstructed statements and log are delivered, with a walkthrough available for counsel, an adjuster, or a mediator on any specific line.

Financial records reconstruction

Common problems we fix

  • The client expects reconstruction to mean filling gaps with a best guess
    We document every assumption in a written log with its basis, so a reader can weigh an assumed figure differently from a documented one.
  • Records are scattered across old software, paper, and personal spreadsheets
    We inventory everything first, before the rebuild starts, so gaps are identified up front instead of discovered mid-project.
  • A deadline was set before anyone knew how much was actually missing
    We give a realistic timeline based on what survives as soon as the inventory is complete, rather than promising a full rebuild on an unrealistic date.
  • A prior bookkeeper's file exists but cannot be trusted as accurate
    We treat it as one more source to cross-check against bank statements rather than the starting point, and note where it conflicts with the bank record.
  • Vendor invoices exist only as paper, boxed and unsorted
    We scan and preserve the originals, then use Dext to extract and match the data faster than manual entry alone.

By the numbers

3 years minimum, up to 7

how long the IRS recommends keeping records supporting a return, longer for underreported income or a worthless-security deduction

Source: irs.gov/businesses/small-businesses-self-employed/how-long-should-i-keep-records, September 2026

Pricing

Reconstruction is scoped and quoted per engagement, since cost depends on how many periods, entities, and accounts are involved and how much documentation survives versus needs to be requested. Our standard monthly bookkeeping tiers on the /us/pricing rate card cover ongoing books that already exist; a dispute-grade or claim-grade reconstruction is quoted separately after we review what records you already have.

See pricing

Financial records reconstruction

Glossary

Assumptions log
A written record stating exactly what was assumed for any transaction that lacked a surviving source document, and the basis for that assumption.
Reconstruction
The process of rebuilding a financial history from surviving source documents when the original books cannot be relied on as kept.
Source document
An original record, such as a bank statement, invoice, or contract, that supports a specific transaction in the reconstructed books.
Document inventory
A list of exactly which records survived for the period at issue and which did not, prepared before the rebuild begins.
Tie-out
The reconciliation step confirming a reconstructed set of books matches the underlying bank totals for the period covered.

Questions

Frequently asked questions: Financial records reconstruction

What if the original books were destroyed or never existed?

We rebuild from whatever survives, bank and card statements, vendor confirmations, prior filings, and document every assumption we have to make in a written log rather than presenting a guess as a fact.

Can a reconstruction support a later tax filing?

Yes, when built to that standard from the start. A credentialed preparer still signs and files any return based on it; our role is preparing the underlying reconstruction.

What if some records are simply gone for good?

We work from what remains and document every place a missing record leaves a gap, rather than presenting an estimate as a documented fact. The gap itself becomes part of the record.

Can a reconstruction be challenged by an opposing party?

Any reconstruction can be questioned, which is why every assumption is logged and every other figure is traceable to a document, so the basis for each number is visible to a challenger.

How long does a financial records reconstruction usually take?

It depends on how many periods and accounts are involved and how much documentation survives. A single year with reasonable records available is typically faster than a multi-year rebuild with significant gaps.

Who reviews the reconstruction before it is delivered?

A senior reviewer reconciles the reconstructed books against bank totals, and reviews the financial statements and the assumptions log before either goes to counsel or the client.

Do you request statements directly from banks?

Yes, where the client's own copies are incomplete and they authorize us to request them. Most banks will produce several years of statement history even on a closed account.

Will the reconstructed books look like a normal set of financial statements?

Yes, the profit and loss and balance sheet follow standard formats. The difference from routine bookkeeping is the assumptions log sitting alongside them and the document-level traceability behind every figure.

Related services

Industries

Related guides

All services in Forensic accounting support

Sources

  1. [1]IRS: How long should I keep records, September 2026
  2. [2]IRS: Recordkeeping for individuals and businesses, September 2026
  3. [3]Dext receipt and invoice capture, September 2026
  4. [4]QuickBooks Online, September 2026

Next step

Talk to the team that would run your books

A short call covers your setup, your software and what a first month would look like. You get a written scope and price after it.

Need this in writing? Download a one to two page scope sheet for Financial records reconstruction: what is included, the process, and where pricing lives.

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