Your bookkeeper just resigned. Maybe they gave notice. Maybe they walked out today. Either way, your stomach just dropped, because you have no idea what state the books are in, payroll is due Friday, and the person who kept everything running just handed you the keys and left.
Take a breath. This is fixable. You're not the first business owner this has happened to, and you won't be the last. What follows is a timed plan you can work through in order.
Hour 0–4: Secure Access
Before you do anything else, before you start thinking about replacements or ring your accountant, lock down your financial systems. This is not optional and it is not paranoid. It's basic financial hygiene.
Change Every Password — Now
Your bookkeeper had access to everything. Today, you take that access back. Change passwords and revoke access on:
- Accounting software — Xero, QuickBooks Online, Sage, FreeAgent. Change the admin password. Remove their user account. Check for any apps they connected, such as Dext or a bank feed tool.
- Bank accounts — Log into every business bank account. Remove their online access. If they could set up payees or approve payments, ring the bank and remove those permissions today.
- Business cards — Cancel any company cards issued in their name. Remove them as an authorised user on all business cards. Check for any recurring payments they set up.
- Payroll software — BrightPay, Sage, Xero or QuickBooks payroll, or whatever you use. Change the admin password. Remove their access. Check the next pay date and the amount.
- HMRC and Companies House — If they had your Government Gateway login or the Companies House authentication code, change the password and ask Companies House for a new code. If they acted as your agent, you can remove their authorisation in your HMRC business tax account.
Identify Immediate Deadlines
Before you get into the detail of what has or hasn't been done, you need to know what's due in the next 14 days. Check for:
- Next payday — This is your most urgent deadline. Staff don't wait. Each pay run also needs a Full Payment Submission (FPS) to HMRC on or before payday.
- PAYE and National Insurance — Due to HMRC by the 22nd of the month after the tax month ends if you pay electronically (the 19th by post). Small employers may pay quarterly instead.
- VAT return — If you are VAT-registered, the return and payment are usually due one month and seven days after the end of the VAT period.
- CIS — If you are a contractor in construction, the monthly CIS return is due by the 19th.
- Supplier payments — Are there critical suppliers (landlord, insurer, key suppliers) with payments due this week?
Write all of this down. This is your survival checklist for the next two weeks.
Hour 4–24: Assess the Damage
Now that your systems are secure and you know what's due, it's time to work out where your bookkeeper left off. This is the diagnostic phase.
Determine the Last Reconciliation Date
Log into your accounting software and check: when were the bank accounts last reconciled? This single fact tells you more about the state of your books than anything else.
- Reconciled through last month — You're in decent shape. The bookkeeper was reasonably current.
- Reconciled through 2–3 months ago — Moderate risk. There's catch-up work to do, but it's manageable.
- Reconciled through 6+ months ago (or never) — Serious problem. Your accounts are unreliable. Everything from this point on is reconstruction.
Check Unpaid Bills, Unsent Invoices, and HMRC Filings
Work through these areas one at a time:
- Supplier bills (creditors) — Are there supplier invoices sitting unpaid? Check your inbox for bills that were never entered. Look for overdue reminders.
- Customer invoices (debtors) — Have customer invoices been sent? Is there work you haven't billed? Has anyone been chasing overdue invoices?
- PAYE and RTI — Log into your HMRC business tax account. Are all FPS submissions in? Has every PAYE payment been made on time? Does HMRC show any amount overdue?
- VAT — Check your VAT account for the last return filed, any late submission penalty points, and any unpaid balance.
- Year-end payroll forms — If they left around the end of the tax year, check that P60s went to staff by 31 May and that any P11D forms are on track for 6 July.
Call Your Accountant
If you have a separate accountant for your year-end accounts and tax returns, they need to know what's happening. Make this call within the first 24 hours.
Ask them:
- Are there any open tax items or filings they're aware of?
- Did the bookkeeper give them everything they needed for the last accounts and tax returns?
- When are the next corporation tax payment, Companies House accounts and Self Assessment deadlines?
- Can they take over the bookkeeping, or recommend someone? (If not, we can help.)
Day 2–7: Triage and Stabilise
You've secured your systems and you know what you're dealing with. Now it's time to stop the damage and get professional help in the door.
Bring In Accountant-Led Help, Not Just a Temp Bookkeeper
This is the most important decision you'll make in this whole process, so read carefully:
A temp bookkeeper on their own is rarely enough. A temp can enter transactions. They usually can't judge whether the previous bookkeeper was doing the job correctly, spot fraud, produce management accounts, or tell you whether your figures are reliable.
What you need is someone qualified who can walk into a mess, assess it quickly, and get your books back on track: an accountant-led bookkeeping service. They should be able to:
- Assess the state of your books in the first week
- Keep payroll and RTI running
- Complete bank reconciliations
- Identify missing transactions and potential fraud
- Produce accurate management accounts within 30 days
- Charge a published price: our Ltd company bookkeeping and management accounts start from £295/month, and a catch-up of the backlog is £495 for three months or £995 for a full year
This is also the moment to ask whether you need to go back to a single in-house bookkeeper at all. Our comparison of outsourced bookkeeping vs an in-house bookkeeper sets out the trade-offs.
Run Bank Reconciliation and Identify Missing Transactions
Whether you do this yourself or your new accountant does it, the first priority is getting bank reconciliations current. This means:
- Download bank statements for every unreconciled month
- Match every transaction on the bank statement to your accounting software
- Identify any transactions in the bank that aren't in your books (missing entries)
- Identify any transactions in your books that aren't in the bank (errors or potential fraud)
- Reconcile credit card statements the same way
Until your bank accounts are reconciled, your P&L and balance sheet are meaningless. This is the foundation everything else sits on.
Day 7–30: Full Recovery
By now you have professional help, your bank accounts are being reconciled, and you know what's been missed. The next three weeks are about cleaning up, catching up, and making a permanent decision.
Clean Up the Chart of Accounts and Catch Up on Entries
Your accountant will work through the backlog:
- Enter any missing transactions (invoices, bills, journals)
- Reclassify miscategorised expenses, which is very common after a bookkeeper leaves
- File any overdue VAT returns or RTI submissions and deal with any penalties (filing late is better than not filing)
- Clean up the chart of accounts if it's been misused or bloated
- Reconcile payroll entries to the payroll reports and HMRC records
If the backlog is large, a fixed-price bookkeeping clean-up (£495 for a 3-month catch-up, £995 for a full year) is often quicker than catching up month by month.
Produce Reliable Accounts and Decide on the Permanent Solution
By the end of month one, you should have:
- Fully reconciled bank and credit card accounts
- A current P&L, balance sheet, and cash flow statement
- All RTI, PAYE and VAT filings up to date
- A clear picture of what you owe and what you're owed
- A documented month-end close process (so this never happens again)
Now you can make a clear-headed decision: keep the outsourced service, hire a full-time replacement, or restructure your finance function entirely. Don't rush it. There's no need to make a permanent hire while you're still recovering.
For a detailed comparison of your options, see: Accountant vs Bookkeeper: What Each One Does
Red Flags Your Bookkeeper May Have Left a Mess
When a bookkeeper quits suddenly, especially without notice, it's worth checking carefully for problems they may have been hiding. That doesn't mean your bookkeeper was dishonest. But a sudden departure is a good reason to check. Look for these warning signs:
Signs of Neglect or Incompetence
- Bank accounts not reconciled for 60+ days — The single biggest red flag. If reconciliations aren't current, nothing else in the books can be trusted.
- Large "Uncategorised Expense" or suspense account balances — These are parking places for transactions the bookkeeper didn't know how to handle. The bigger the balance, the bigger the problem.
- Missing receipts and documentation — If expenses were entered without supporting documents, you have both a tax risk (HMRC can refuse VAT claims without a valid invoice) and an internal control failure.
- Late or missing RTI submissions and PAYE payments — Check your HMRC business tax account. Late submissions and payments carry penalties and interest, and in serious cases HMRC can make directors personally liable for unpaid National Insurance.
- Credit cards never reconciled — Card transactions pulled in from a feed but never checked against the actual statements. Duplicates and missing transactions are almost guaranteed.
Signs That Warrant a Closer Look (Potential Fraud)
- Round-number journals with no documentation — A £5,000 journal to "adjust" an account balance, with no supporting note or source document, is a classic fraud pattern.
- Cheques or transfers to cash or to the bookkeeper personally — Review your payments for the past 12 months. Any payments to the bookkeeper that weren't authorised wages should be investigated.
- Suppliers you don't recognise — Fake suppliers are one of the oldest bookkeeper fraud schemes. If there's a supplier in your aged creditors report that no one in the company recognises, dig deeper.
- The bookkeeper never took a holiday — A well-known fraud indicator. Someone manipulating the books often avoids time off because they need to keep managing the cover-up.
- Nobody other than the bookkeeper ever saw the bank statements — If the bookkeeper was the only person who ever looked at them, there was no internal control. Full stop.
🇬🇧 UK Deadlines in Detail
The emergency plan above covers the order of work. These are the HMRC and Companies House rules behind the deadlines you need to protect.
HMRC Real Time Information (RTI)
Under RTI, payroll information must be reported to HMRC on or before each payday. This isn't a quarterly or annual obligation: it's every single pay run. If your bookkeeper was running payroll and sending Full Payment Submissions (FPS), make sure this continues without a gap. Late FPS penalties run from £100 to £400 a month depending on how many employees you have, although the first late month in each tax year is not usually penalised.
VAT Return Deadlines
If your business is VAT-registered, returns are usually due one month and seven days after the end of each VAT period. Under Making Tax Digital (MTD), VAT returns must be filed through MTD-compatible software. Check your HMRC business tax account to confirm when your next VAT return is due and whether the previous returns went in on time. Late VAT returns earn penalty points under the system introduced in January 2023; reach the threshold (4 points for quarterly filers) and each further late return costs £200.
For a complete guide to MTD, see: Making Tax Digital 2026: What UK Businesses Need to Know. We also file MTD VAT returns for £99 a quarter.
Companies House Deadlines
If your bookkeeper also handled Companies House filings (confirmation statements, annual accounts), check the next deadlines. Late filing of annual accounts carries automatic penalties from £150 (up to one month late) to £1,500 (over six months late) for private companies. These penalties double if accounts are late two years running.
For more on Companies House obligations, see: Companies House Filing Guide 2026
PAYE Payments and CIS
If you employ staff, PAYE tax and National Insurance must be paid to HMRC by the 22nd of each month (or the 19th if paying by post). If your business works in construction, Construction Industry Scheme (CIS) returns are due monthly by the 19th. Check both are current.
Frequently Asked Questions
What should I do first when my bookkeeper quits?
Change passwords on all financial systems straight away: accounting software, bank portals, payroll software, business cards and your HMRC login. Remove the departing bookkeeper's access to everything. Then check your next payday and upcoming HMRC deadlines. Securing access and listing deadlines should both happen within the first four hours.
Who can take over the books while I find a replacement?
An accountant-led bookkeeping service can usually take over faster than you can recruit a new bookkeeper. More importantly, they can assess the state of your books, find problems the previous bookkeeper left behind, and keep payroll and VAT on track. Our Ltd company bookkeeping and management accounts start from £295/month.
How do I know if my bookkeeper left a mess?
Check bank reconciliations first: if they're more than 60 days behind, your books can't be trusted. Also look for large "Uncategorised" or suspense balances, late RTI submissions or PAYE payments, unpaid supplier bills past terms, and credit card statements that were never reconciled. Round-number journals with no documentation need a closer look.
Should I hire a new bookkeeper or move to an outsourced service?
It depends on your volume and what you need from the numbers. An in-house bookkeeper records transactions. An accountant-led service should also give you reconciled books, management accounts and someone checking the figures. Our published prices are from £295/month for Ltd company bookkeeping and management accounts, and £495 for a 3-month catch-up if the books are behind. Read our full comparison to decide.
What tax deadlines am I at risk of missing?
The most urgent are payroll deadlines: an RTI submission on or before every payday, and PAYE and National Insurance payments by the 22nd of each month. Then check your VAT return (usually one month and seven days after the period end), any monthly CIS return (due by the 19th), and your corporation tax and Companies House accounts deadlines. Late payroll and VAT filings bring penalties and interest from HMRC.