The short answer
To catch up on bookkeeping, gather all bank statements and records for the missing period, set up accounting software, import bank transactions, code them month by month, reconcile each month to the statement, and chase missing paperwork. Work from the oldest period forward. Expect around two to six hours per month of backlog.
Falling behind on bookkeeping is far more common than anyone admits. Life gets busy, receipts pile up, the bank statements stay unopened and suddenly it has been eight months. The longer it goes on the worse it feels, and the more tempting it is to avoid it altogether. This article is the opposite of a lecture. It is a calm, step-by-step plan for getting back on top, whether you are three months behind or three years.
First: you are not alone, and it is fixable
Bookkeepers see backlogs every week. Nobody is shocked. The records you need are almost always recoverable, because your bank holds a complete history of what went in and out of the account. The job is to turn that history into proper books. It is a project with a start and an end, not an ongoing crisis.
Why catching up matters
- Tax returns and filings. Self Assessment, VAT and Corporation Tax all depend on accurate figures. Late filing brings penalties and interest.
- Making Tax Digital. If you are in scope, you need current digital records. See our Making Tax Digital guide.
- Cash flow. Unpaid invoices, forgotten bills and unknown tax liabilities all hide in a backlog.
- Peace of mind. Knowing where you stand is a relief.
Step 1: Work out how far behind you are
Write down the date of your last reconciled bank statement. That is your starting point. Then list the accounts involved: current accounts, savings, business cards, payment processors and any loans. Check whether any filing deadlines have passed or are near, such as a Self Assessment return or VAT return. If something is overdue, prioritise that, because penalties build over time. See our guide to Self Assessment deadlines.
Step 2: Gather your records
You do not need every receipt before you start. Begin with:
- Bank statements for every account, for the whole period
- Credit card statements
- Payment platform reports from PayPal, Stripe, Amazon, Etsy and others
- Sales invoices you issued
- Supplier invoices and bills
- Payroll reports, if you employ people
- Loan and finance agreements
- Any previous accounts or tax returns
Your bank will provide statements for several years, usually free online. For missing receipts, supplier portals and email searches recover many of them. Our guide to business records for HMRC lists what to keep.
Step 3: Set up proper software
Choose accounting software and connect your bank feeds. Most feeds import up to several months of history, and statements can be uploaded for older periods. Set the opening balances to match your last reconciled position. If you are moving from spreadsheets, see software migration, and for choosing the software see our guide to accounting software.
Step 4: Work in order, one month at a time
Start with the oldest month and work forward. For each month:
- Import or enter the bank transactions.
- Categorise each one. Use rules for repeating items.
- Match payments to invoices and bills.
- Reconcile to the statement. The closing balance must agree before moving on.
- Flag queries. Keep a list of transactions you cannot identify.
Working month by month keeps the task manageable and ensures errors do not carry forward. Our guide to reconciling a bank account explains the process.
Step 5: Deal with missing paperwork
For every transaction without a receipt, use these sources in order:
- Email searches for the supplier name
- Supplier online accounts
- Card and bank statements as evidence
- A written note explaining what the item was
HMRC accepts reasonable reconstruction when original records are lost, as long as you make an honest effort. For a serious gap or an HMRC enquiry, our record rebuild service documents the work properly.
Step 6: Clear the queries
Go through your list of unidentified items. Ask whether each is business or personal, then code it accordingly. Personal items paid from a business account are drawings, or for a limited company, a director's loan. Our post on the director's loan account explains how to record these.
Step 7: Review the result
Run a profit and loss and balance sheet for the whole period. Do the numbers look plausible? Compare with what you expected. Check the VAT account if relevant. Look at the biggest categories for obvious errors, such as one large item coded to the wrong place.
Step 8: File anything outstanding
Once the books are right, prepare and file overdue returns. If you are late, file as soon as possible, because penalties and interest increase over time. Honest late filers are treated more leniently than people who do nothing. Your accountant can advise on whether to disclose anything specific to HMRC.
Step 9: Stay current
The most important step. Set up a monthly routine so you never fall behind again.
- Connect bank feeds and reconcile monthly
- Capture receipts as you spend
- Review VAT and unpaid invoices
- Put deadlines in your calendar
Our monthly bookkeeping checklist turns this into twelve jobs.
How long does it take?
It depends on the volume of transactions and the state of your records. As a rough guide:
| Situation | Estimated time per month of backlog |
|---|---|
| Low volume, bank feeds available | 1 to 2 hours |
| Moderate volume, some paperwork missing | 2 to 4 hours |
| High volume or multiple platforms | 4 to 8 hours |
If you are six months behind with moderate volume, plan for roughly 12 to 24 hours of work.
What it costs to get help
At Bookkeeping Services, catch-up work is charged at our flat £15 an hour, and our quote tool estimates the hours from the number of months behind and your monthly volume. A six-month backlog on a business with about 100 transactions a month typically comes to around 13 to 16 hours of catch-up work, or roughly £200 to £240, plus one hour of onboarding. You see the figure before you pay. See our catch-up bookkeeping service or get an instant quote.
Doing it yourself versus getting help
Doing it yourself is possible and educational, but it takes time you could spend earning. Many people try, run out of steam in month four and end up paying anyway. A bookkeeper works faster because the process is familiar, and also spots errors you might miss. A sensible compromise is to hire help for the backlog and then take over the monthly routine yourself, or keep the bookkeeper on at a modest monthly cost.
What to do this week
If you are staring at a backlog and cannot face it, do three small things today. Download your bank statements for the whole period, because everything else can be rebuilt from them. Write down any filing deadline that has passed or is within 60 days. And decide who will help, whether that is you with a free weekend or a bookkeeper. Starting with those three steps converts a vague dread into a defined project, and most people find the first week is the hardest.
Frequently asked questions
How far back should I go?
As far as your tax and filing obligations require, typically all periods where a return is missing or inaccurate. Your accountant can advise on how far back to go.
Will HMRC penalise me for being behind?
Not for late bookkeeping itself, but for late filings and payments. Fix any overdue filings first.
What if I have lost bank statements?
Banks can supply copies, often for several years. Online banking usually has recent history.
Can I catch up and file in one go?
Yes. Once the periods are reconciled, returns can be prepared. We pass clean records to Accotax or your accountant.
Can you do the catch-up for me?
Yes. See catch-up bookkeeping or request a free health check.
This article is general information, not personal tax or financial advice. Rules and rates change, so check GOV.UK or speak to an accountant about your circumstances. Rates shown are for 2026/27, last checked November 2026.
Written by The Bookkeeping Services team
Bookkeeping Services is run by Accotax London Limited, an ICAEW regulated firm with ACCA and AAT qualified people. Our guides are reviewed against GOV.UK and HMRC guidance before publishing and updated when the rules change.
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