Falling behind on the books happens to more businesses than admit it, and the fix is a defined one-off project: catch-up bookkeeping. It is priced differently from routine bookkeeping because it involves reconstruction, not just processing, and the fee depends on how deep the hole is, how many transactions are in it, and how much of the paperwork survived.
Routine bookkeeping pricing is covered in what bookkeeping services cost; the broader fee context is in our small business accountancy cost guide. This guide is about the backlog itself.
How firms size a backlog
Three measurements dominate the quote:
- Months behind. Each unprocessed month is a unit of work, so the duration of the gap sets the project’s floor.
- Volume per month. A quiet consultancy’s backlog month and a busy shop’s backlog month are very different jobs, exactly as with routine bookkeeping.
- Completeness of records. This is the multiplier. If bank statements, sales records and supplier invoices exist and are accessible, the work is processing. Where they are missing, it becomes investigation: requesting duplicates, matching payments to guessed suppliers, and reconstructing income from bank credits.
A firm that quotes a backlog without seeing it is guessing. Expect a short paid or free assessment first (access to your bank statements and whatever records exist), followed by a fixed project price.
Why unreconciled accounts cost more than unentered ones
Counterintuitively, a backlog where someone half-kept the books can cost more than one where nothing was done. Wrong entries have to be found and unpicked before correct ones go in, and an unreconciled bank with months of miscategorised transactions is slower to fix than a clean import. If your records are behind, resist the urge to rush entries in before handing over. A consistent gap is easier to fill than an inconsistent attempt.
Historic VAT raises the stakes
If you are VAT-registered, a bookkeeping gap usually means VAT returns were filed from estimates or not filed at all. The catch-up project then has a compliance dimension: rebuilding each period, comparing what should have been declared with what was, and correcting through the proper route. This is careful work with deadlines attached, and it is the strongest reason not to let a backlog age. The pricing details sit in our guide to VAT return costs.
What a catch-up project should deliver
By the end you should have: every account reconciled to the bank, transactions categorised to a standard the year-end accountant can rely on, VAT positions corrected where needed, a record-keeping system set up so the backlog does not recur, and a written summary of anything the reconstruction could not resolve. That last item matters: gaps that could not be evidenced should be documented, not papered over. HMRC’s baseline expectations for self-employed records are the minimum standard the rebuilt books must meet.
Keeping the project price down
- Gather everything before work starts: bank statements for the whole gap, sales records, supplier logins
- Grant read access to your bank feed and any software rather than exporting piecemeal
- Answer identification queries in batches, quickly, since unanswered queries stall the project on billable time
- Agree the categorisation standard upfront so nothing is done twice
- Start the ongoing routine immediately after, so the fix is permanent
Frequently asked questions
How far behind is too far for catch-up?
There is no cliff edge. Multi-year backlogs get rebuilt regularly. Cost and evidence both degrade with time though: banks limit statement history, suppliers close accounts, and memories fade. Whatever the gap is today, it is the cheapest it will ever be.
Will the firm judge me for the mess?
Any established practice has seen far worse. Backlogs follow illness, growth spurts, staff departures and bad software transitions. The professional response is a scoping conversation, not a lecture.
Can catch-up work happen alongside my normal trading?
Yes. The standard approach runs the reconstruction in parallel while current months are kept live, so you stop falling further behind on day one.
Is a backlog quote fixed or open-ended?
Push for fixed, with a stated assumption list (for example, that bank statements are available for the whole period). Open-ended hourly reconstruction is where costs drift. The trade-offs are the same as in fixed-fee versus hourly pricing.
What happens if reconstruction changes past tax figures?
If rebuilt records show past returns were wrong, corrections follow the proper disclosure routes. That is a feature, not a flaw: it is materially better coming from you than surfacing in an HMRC check later.
Get the backlog sized, then fixed
Our bookkeeping service handles catch-up projects as fixed-price work with the assumptions written down, and the fees page shows how the ongoing routine takes over afterwards. Request a quote, tell us honestly how far behind things are, and we will come back with a plan rather than a judgement.