Catch-Up Bookkeeping in the UK: Cost, Time and Steps
What catch-up bookkeeping covers when your books are months behind, how long it takes, what it costs in the UK, and what to hand over so it is only done once.
Mathias Popp
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In short
Catch-up bookkeeping (also called clean-up or backlog bookkeeping) brings books that are months behind up to date, so that VAT returns, accounts and tax can be filed from real numbers.
The work is bank reconciliation for every missed month, entering every bill and invoice, finding the documents, and correcting what was posted wrongly in between.
How long it takes depends on three things: whether the bank feed is intact, whether the receipts exist, and whether a VAT return was filed from the wrong figures.
Providers price it as a one-off quote after looking at the ledger, or hourly. Insist on the quote, and on a fixed monthly fee for the ongoing work once you are current.
What catch-up bookkeeping is
Catch-up bookkeeping is the work of reconstructing and reconciling the books for a period that was never properly kept. The books might be six months behind because the founder ran out of evenings, or a year behind because a bookkeeper left and nobody replaced them, or technically up to date but wrong, because transactions were coded to whatever category the software guessed.
It differs from ordinary monthly bookkeeping in two ways. The documents are harder to find, because suppliers, banks and staff have moved on. And the earlier periods may already have been used: a VAT return filed from wrong figures, or a set of accounts filed at Companies House from a ledger that did not reconcile. Part of a catch-up is finding out what was filed, and correcting it.
What it costs to stay behind
The deadlines do not wait for the bookkeeping. For a UK private limited company:
Filing | How late | Penalty |
|---|---|---|
Accounts to Companies House | Up to 1 month | £150 |
1 to 3 months | £375 | |
3 to 6 months | £750 | |
More than 6 months | £1,500, doubled if late two years running | |
VAT return to HMRC | Each late return | One point. At 4 points (quarterly filers) a £200 penalty, then £200 for each further late return |
Corporation Tax return to HMRC | 1 day | £200 |
3 months | Another £200 | |
6 months | 10% of unpaid tax, on HMRC's estimate | |
12 months | Another 10% of unpaid tax |
The figures are from gov.uk: Companies House late filing, Corporation Tax late filing and VAT penalty points. A Corporation Tax return filed late three times in a row costs £1,000 per penalty. The larger cost is the decisions made on wrong numbers in the meantime: a VAT bill a quarter larger than expected, or a dividend paid from profit that was not there.
What a catch-up engagement covers
Scoping. The provider looks at the ledger, the bank feeds and what has been filed, and tells you how many months are affected and what documents are missing. A quote that arrives without this step is a guess.
Bank and card reconciliation for every month in the backlog. Every transaction matched to an invoice, bill, transfer or expense, and each month closed with the ledger equal to the statement.
Sales and purchase ledgers rebuilt. Invoices raised, supplier bills entered, and the aged debtors and creditors made true.
Payment processors reconciled. Shopify, Stripe, Amazon and PayPal payouts split into sales, fees and refunds. This is where e-commerce backlogs take the longest.
Documents recovered. Receipts and invoices fetched from inboxes and supplier portals, and a list of the ones that cannot be found, because HMRC expects evidence for VAT reclaimed.
Corrections. Miscoded transactions moved, duplicates removed, the VAT control account, PAYE and director's loan account reconciled for each period.
Filings reviewed. Any VAT return filed on wrong figures is compared to the corrected ones. A net error up to £10,000, or up to £50,000 if it is no more than 1% of the return's Box 6 figure, is corrected on the next return. A larger error is reported to HMRC separately.
Handover to monthly bookkeeping. The last step is the one that stops it happening again: an agreed monthly routine, or a provider who runs one. Our month-end close checklist lists the routine.
How long it takes
Three things decide how long it takes:
Whether the bank feed is intact. Feeds that were never connected mean statements have to be imported first. How far back you can export CSV varies by bank. Older months usually come as PDF statements, which have to be converted before they can be imported.
Whether documents exist. A business that photographed receipts and did nothing else is in far better shape than one with a shoebox, and both are ahead of one with nothing.
Whether anything was filed from the wrong numbers. Correcting a filed VAT return adds a review step and sometimes correspondence with HMRC.
What you will be asked to provide
Access to the accounting software, or an export if you are switching.
Bank and card statements for every month in the backlog, as CSV where possible.
Payment processor and marketplace exports for the same period.
Sales invoices raised outside the software, and any contracts with unusual terms.
Payroll reports, if you employ anyone.
Copies of what was filed: VAT returns, accounts, Corporation Tax return.
An hour of your time to answer the questions nobody else can: what that £2,400 transfer was, whether the laptop was for the business.
How UK providers price it
Three models are common. Hourly, which suits a scoping exercise but leaves the total open. A fixed quote per month of backlog, usually after a look at the ledger. Included in the first months of an ongoing fixed fee, where the provider absorbs a modest backlog to win the ongoing work. Whichever it is, get the scope in writing: which months, which accounts, whether filed returns will be corrected, and what happens to the documents that cannot be found. Our guide to fixed-price bookkeeping covers what the ongoing fee should include.
Where Balance fits
Balance is an AI-powered accounting firm in London and Copenhagen. For a catch-up, its AI agents do the volume work, matching months of bank, card and processor transactions and chasing the missing receipts, which is what makes a backlog expensive by the hour. A named ACA-qualified accountant reviews each period and signs off the books. Once you are current, the bookkeeping continues at one agreed monthly fee from £350 per entity, inside your existing Xero, e-conomic or Business Central.
If you would rather not do any of this yourself, see what Balance includes or book a call.
FAQ
What is catch-up bookkeeping?
Bringing books that are behind up to date: reconciling every missed month, entering invoices and bills, recovering documents and correcting errors, so that returns and accounts can be filed from reconciled figures.
How far back can bookkeeping be caught up?
As far as the records allow. Banks provide older statements on request, and HMRC expects VAT records to be kept for six years, so a backlog can go back further than the bank feed.
Can I file my VAT return while my books are behind?
File on time with the most accurate figures you have. Using estimates needs HMRC's agreement to a method, and every figure that turns out wrong becomes a correction during the catch-up. A late return adds a penalty point.
How much does catch-up bookkeeping cost in the UK?
It depends on the number of months, accounts and sales channels, and on whether filed returns need correcting. Ask for a fixed quote after the provider has looked at the ledger, bank feeds and filings.
Will catch-up bookkeeping find errors in accounts already filed?
Sometimes. If the filed figures were wrong by a material amount, the accountant will advise whether to correct them with Companies House or HMRC, or to adjust in the current period.
How do I stop falling behind again?
Reconcile every week, attach receipts the day they arrive, and run a monthly close, or hand the bookkeeping to a provider who runs one.
More answers are on our FAQ page.