Switching Accountants Mid-Financial-Year: How to Rebuild Your Books

Quick answer: When you switch accountants or bookkeepers partway through the financial year, the biggest risk is a gap where nobody has clean, reconciled records — the old accountant stopped maintaining them, and the new one hasn't caught up yet.

Close that gap by requesting a full handover file from your previous accountant, pulling bank statements to fill anything missing, and reconciling from the last clean point up to today before your new accountant picks up ongoing work.

Changing accountants mid-year is common — and usually for good reason, whether that's cost, service, or simply outgrowing what you started with. But it creates one predictable problem: a stretch of time where your books aren't fully up to date, because the old accountant's work stopped before the new one's began. Here's how to close that gap properly instead of letting it quietly become next year's problem.

If this handover involves more than just your own books — say, an ATO request too — our full guide on reconstructing financial records for the ATO covers the broader process.

Why the gap happens

A few things typically go wrong in a handover, even an amicable one:

• The old accountant's engagement ends before the current BAS period or financial year is fully reconciled
• Bank feeds or software access aren't transferred cleanly, leaving weeks or months of unreconciled transactions
• Source documents (invoices, receipts, payroll records) sit with the outgoing accountant or in a format the new one doesn't have yet
• Nobody explicitly owns the gap period — the old accountant considers the relationship over, and the new one hasn't formally started

None of this is unusual, and it's rarely anyone's fault outright — it's just what happens when responsibility changes hands without an explicit handover process.

Step-by-step: rebuilding your books after a switch

Step 1: Request a full handover file from your previous accountant

Before anything else, ask your outgoing accountant for a complete handover: the last set of reconciled accounts, any outstanding BAS or tax lodgements, access to accounting software, and copies of source documents they hold. In Australia, they're generally expected to provide this in a reasonable timeframe — most professional bodies (like CPA Australia or Chartered Accountants ANZ) have handover expectations built into their codes of conduct.

Step 2: Identify exactly where clean records stop

Find the precise date or period where the last fully reconciled figures end. This is your baseline — everything before it should be trustworthy; everything after it is the gap you need to fill. Don't assume the handover file is complete without checking; it's common for the "last reconciled" point to be earlier than expected.

Step 3: Pull bank statements to cover the gap

For the period between "last clean point" and "today," bank statements are your most reliable source of truth — more reliable than partially updated software, which may have some transactions entered and others missing without an obvious way to tell which is which.

If you're missing statements for that period, most banks can reissue them through online banking or on request — see our guide on how far back you can get bank statements in Australia if any of the gap reaches further back than expected.

Step 4: Convert and reconcile the gap period

Once you have the statements, convert them into structured transaction data and reconcile against whatever partial records exist in your software — categorizing transactions, matching invoices and receipts where you have them, and flagging anything unclear for your new accountant to review rather than guessing.

If the gap period includes a BAS that was estimated, missed, or only partially reconciled, our BAS reconciliation guide walks through fixing that specifically.

Step 5: Brief your new accountant clearly on what's reconciled and what isn't

Hand your new accountant a clear picture: what's fully reconciled, what you've reconstructed yourself and how, and what's still uncertain. This matters more than handing over a technically "complete" set of books — an accountant who knows exactly where the soft spots are can review efficiently; one who assumes everything is solid may miss something that later becomes a problem.

Step 6: Set up a cleaner handover process for next time

Once you're through this transition, it's worth deciding in advance how you'd handle it if it happened again: keeping your own copies of bank statements and source documents as you go, rather than relying entirely on whoever your accountant is at the time, makes any future switch far less disruptive.

What to do if the previous accountant won't cooperate

Most handovers go smoothly, but occasionally an outgoing accountant is slow or unresponsive. If a reasonable request goes unanswered, you can raise it with their professional body (CPA Australia, Chartered Accountants ANZ, or the Tax Practitioners Board, depending on their registration) — but in practice, working from your own bank statements to reconstruct the gap yourself is often faster than waiting on an uncooperative handover, and it means you're not stuck if the wait drags on.

FAQ

How long does a proper accountant handover usually take? It varies, but a straightforward handover with a cooperative outgoing accountant typically takes one to a few weeks. Complex situations (a full financial year gap, missing documents) can take longer.

Do I have to keep using the same accounting software when I switch? No — but if you're switching software as well as accountants, factor in migration time for historical data, and confirm your new accountant can work with whatever you land on.

Is my new accountant responsible for fixing errors from before they started? Generally, a new accountant reviews and reconciles going forward from when they take over — they're not automatically responsible for errors made under the previous engagement, though they can usually help identify and correct them once found.

What if I can't find a previous accountant to request records from? If they've closed their practice or you've lost contact, your bank statements remain the most reliable independent source to reconstruct from, regardless of what records the previous accountant did or didn't leave behind.

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Rebuilding books after a handover gap almost always starts with bank statements — and converting them from PDF into usable data is the slowest manual step in the process. Data River automates that conversion, so you (or your new accountant) can spend time reconciling, not retyping.