What happens to your records and software when you switch accountants?
When you switch, your new accountant requests your records from your old firm as part of professional clearance — your accounts, tax returns, trial balances, ledgers, payroll and VAT data, and key correspondence. If you use cloud accounting software, you simply invite your new accountant as an adviser and remove the old firm's access; your data stays in your account throughout. Your old accountant should provide what's needed for a clean handover. The one exception is a "lien": a firm may be entitled to hold back certain documents until any outstanding fees are paid.
The handover pack — what your new accountant requests
Through the professional clearance process, your new firm asks your old firm for everything it needs to take over seamlessly. The pack is fairly standardised across UK practices regulated by ICAEW, ACCA or the IFA:
Prior accounts and tax returns
The most recent statutory accounts, corporation tax (CT600) returns, or sole-trader/partnership Self Assessment returns — typically the last two to three years.
Trial balances and ledgers
Opening and closing trial balances for the last year filed, plus underlying nominal ledgers, so the new firm can pick up the books cleanly.
Payroll records
RTI submissions, P60s, P11Ds, employee details, and the year-to-date figures the new firm needs to take over PAYE without restarting.
VAT details and submissions
VAT registration number, scheme (standard, cash, flat rate), submission history, and any partial-exemption or special-method positions.
Relevant HMRC correspondence
Letters, notices, agent authorisations, and the status of any current enquiries — so nothing falls between the two firms.
Any continuing matters
Open enquiries, in-progress filings, R&D claims, capital allowances elections, or anything else mid-flight that the new firm needs to inherit.
The detail varies slightly by firm and engagement, but the spine of the pack is the same: enough information for the new accountant to pick up where the old one left off, without restarting any in-progress work.
Cloud software is the easy case
If your books are on a cloud accounting platform — Xero, QuickBooks, FreeAgent, Sage Business Cloud, FreshBooks — the data lives in your account, not your accountant's. The accountant is simply an "adviser" or "user" on your subscription. That means switching is almost trivial on the software side:
- Invite the new firm as an adviser through your platform's user-management settings.
- Confirm with the new firm that they have access and the data looks complete.
- Revoke the old firm's access — usually a single click in the same screen.
Nothing migrates. No data is exported, re-imported, or risks being lost in transit. The same live ledger that your old accountant was looking at is the same one your new accountant now sees. This is one reason a good new accountant will often suggest moving to cloud software early in the relationship if you are still on a desktop tool or spreadsheets — it makes any future change effortless.
Your own records are yours
The records you originally provided to your accountant — bank statements, sales invoices, supplier invoices, receipts, contracts, payroll inputs — belong to you. They were yours when you handed them over and they are yours when you take them back. A regulated accountant cannot withhold primary records. The professional bodies — ICAEW, ACCA and IFA — set baseline expectations for this, and your engagement letter sets out the detail of who keeps what and for how long.
In practice, almost everything you originally supplied has either already been returned, is sitting in your cloud accounting software, or is held in a secure portal you have access to. If your old firm holds physical records, they are obliged to return them; they cannot be kept against an unpaid bill (that is the one document category they can retain — see the lien rule below).
The lien — the one catch
The single thing that can hold up a records handover is a lien. A lien is a legal right for an accountant to retain certain documents they have prepared until outstanding fees are paid. It is a long-standing principle in UK professional practice, recognised by the major accountancy bodies.
Two important points about the lien:
- It only applies to documents the firm produced for you — internal working papers, draft computations, prepared accounts that you have not yet paid for. It does not apply to primary records you supplied (those must always be returned).
- It is conditional on a legitimate unpaid bill, not on a disagreement or hard feelings. If you have paid what you owe, there is no lien to exercise.
This is exactly why the cleanest sequence is to settle any outstanding invoice before switching. If a fee is genuinely unreasonable that is a separate dispute — but don't let it hold the whole handover hostage; pay what is properly owed and move. The pillar guide (Switching accountants: the complete UK guide) and the friction spoke (What if my old accountant won't cooperate?) cover the escalation route to ICAEW, ACCA or IFA if a firm misuses the lien.
The lien rule — settle any outstanding invoice first
If you owe your old firm outstanding fees, they may exercise a "lien" over documents they prepared until the bill is settled. This is exactly why settling any outstanding invoice before you switch keeps everything smooth. Primary records you supplied must still be returned — but anything the firm produced on your behalf can be held back until paid for.
Data protection — UK GDPR applies throughout
Both firms must handle your personal and financial data in line with the UK GDPR and the Data Protection Act 2018 throughout the transfer. That is not a courtesy — it is the law. Regulated UK accountants are also bound by their professional body's confidentiality rules (ICAEW, ACCA, IFA), which sit on top of the statutory regime.
In practice the handover happens through secure channels — typically a client portal, encrypted email, or direct adviser-to-adviser access on your cloud accounting software. Your data does not flow via you, it does not sit in any unprotected location, and both firms are required to keep audit trails of what was sent and received. If anything were ever to go wrong, both firms have reporting obligations to the Information Commissioner's Office under UK GDPR.
The reassurance: in the normal case — bills paid, cloud software, a regulated old firm — your records move across cleanly and your data is never at risk. The handover is a routine professional process, and a good new accountant manages it so you barely notice.
Related reading in the switching series
- Switching accountants: the complete UK guide — the full pillar: process, timing, clearance, records, friction, signs.
- How to change accountant: the step-by-step process — the 7 steps in detail, where the records handover sits in the timeline.
- What is a professional clearance letter? — the letter your new firm sends to request your records in the first place.
- What if my old accountant won't cooperate? — fee disputes, the lien, and the escalation route to the professional bodies.
Frequently asked questions
What records does my new accountant need from my old one?
Through the professional clearance process, your new accountant typically requests: your most recent statutory accounts and corporation tax returns (or sole-trader/partnership returns), the trial balance and ledgers, payroll records (if applicable), VAT registration details and recent submissions, any relevant HMRC correspondence, and a note of any continuing matters such as an open HMRC enquiry or in-progress filings. The old firm provides what is needed for a clean handover.
Will my cloud accounting data transfer when I switch accountants?
If your books are on a cloud platform such as Xero, QuickBooks, FreeAgent or Sage Business Cloud, your data lives in your account — not your accountant's. Switching is simply a matter of inviting the new firm as an adviser, confirming the handover, and then revoking the old firm's access. Nothing migrates and nothing is lost. This is by far the easiest case, and it is one reason a good new accountant will often move you to cloud software early in the relationship.
Who owns my accounting records?
Documents and primary records you provided to your accountant — bank statements, sales invoices, receipts, contracts, payroll inputs — belong to you. Working papers and documents the accountant prepared internally (review notes, planning files, internal schedules) generally belong to the firm, though anything they have prepared on your behalf and you have paid for should be released. Your engagement letter sets out the detail, and UK professional bodies (ICAEW, ACCA, IFA) set baseline expectations for what is handed over.
What is a lien and when does it apply?
A lien is a legal right for an accountant to retain certain documents they have prepared until outstanding fees are paid. It applies only to documents the firm produced for you, not to documents you originally supplied (those must always be returned). The lien is the single most common reason a records handover stalls, and the fix is almost always the same: settle any legitimate outstanding invoice with your old firm before switching, and the records are released for the handover. ICAEW, ACCA and IFA all expect members to act professionally in this process.
Will my data be safe during the switch?
Yes — both firms must handle your personal and financial data in line with the UK GDPR and Data Protection Act 2018 throughout the transfer. Regulated UK accountants are subject to their professional body's confidentiality rules (ICAEW, ACCA, IFA), and the handover happens through secure channels — typically a portal, encrypted email, or direct adviser-to-adviser cloud-software access. Your data does not go via you, and it does not sit in any unprotected location.
What happens to my old accountant's working papers?
Internal working papers — the review schedules, planning files and tax computations the old firm prepared for its own use — are generally the firm's property, not yours, and they are not normally part of the handover pack. What the new firm receives is the information it needs to take over: the final accounts, tax returns, trial balance and ledgers, payroll and VAT data, and any HMRC correspondence. That is enough to continue seamlessly; the old firm's internal working papers are not required.
Do I need to give my new accountant my HMRC login?
No — and you should not share your Government Gateway credentials with anyone. The proper route is for your new accountant to request agent authorisation through HMRC (via the agent services account, or by sending you a 64-8 form or an online authorisation request). You then approve it through your HMRC account or by post. Once authorised, the new firm can act for you directly without ever needing your personal login. This is exactly the same authorisation route your previous accountant used.
The full Switching Accountants series
Pillar
Switching accountants: the complete UK guide
The pillar — the 7-step process, timing, professional clearance, records, friction, and signs to switch, in one place.
How to change accountant: the step-by-step process
The 7 steps in detail — engagement letter, ID/AML, clearance, records, HMRC authorisation, cloud-software handover.
Can you switch accountants mid-year?
Yes — but timing matters. The cleanest break points, and how to avoid paying two firms for overlapping work.
What is a professional clearance letter?
The standard letter your new firm sends your old one — what it asks, why it matters, and why it rarely causes problems.
What if my old accountant won't cooperate?
Fee disputes, slow responses, the lien rule — and the escalation route through ICAEW, ACCA or IFA when needed.
Signs it's time to switch accountant
Missed deadlines, rising fees with flat value, no proactive tax planning — the signals that say you've outgrown them.
Switching accountants is simpler than people think.
Your new accountant handles the heavy lifting. Two emails, an ID check, and a few weeks later you're set up — with the dividend, MTD and payments-on-account planning your old firm probably wasn't doing.
We do almost all the work
Professional clearance letter to your old firm, records collected, HMRC agent authorisation done online. Your part: two emails and a quick ID check.
Switch any time of year
You do not have to wait for year-end. We pick the cleanest handover point so you do not pay twice for overlapping work.
Chartered, IFA-supervised
A regulated practice. Your old accountant is professionally bound to cooperate within a reasonable timeframe, and your records and HMRC position stay protected throughout.
IFA-supervised UK chartered practice · four UK offices · switch handled from clearance to HMRC authorisation
About the author
Mehmood Rajoka, Managing Partner, RR Accountants
Managing Partner at RR Accountants — a UK practice supervised by the Institute of Financial Accountants. Specialist focus on Self Assessment, UK landlord and property tax, MTD for Income Tax, and limited-company advisory. RR Accountants serves clients across four UK offices and handles the entire switching process — clearance letter, records, HMRC authorisation — for new clients each week.
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This guide is general information about the records-handover process when changing UK accountants. It is not personal or legal advice. For advice tailored to your situation — including any active fee dispute or open HMRC enquiry — speak to a regulated UK accountant. Professional-body conduct expectations are set by ICAEW, ACCA and the IFA. Verified as of .