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How to switch accountants: UK handover checklist

Plan an accountant change with clear deadlines, records, software access and written responsibility for outstanding work.

TaxNuvia editorial team · Published 27 May 2026 · 4 min readEditorial review: 12 September 2026. General guidance, not individual tax advice.

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Illustration accompanying the switching guide

Key takeaways

  • Agree who handles every outstanding filing before ending the old arrangement.
  • Check notice terms, work in progress and access to your records.
  • Handover timing depends on your circumstances; there is no universal four-week timetable.

Map the work before choosing a date

Write a list of upcoming returns, accounts, payroll runs and other deadlines. Put the responsible firm next to each task. Do not assume a deadline transfers automatically because you signed a new engagement letter.

Read your current notice and fee terms. Ask what work has already started, what remains to be billed and which records will be provided. Resolve uncertainties before setting a final handover date.

Ask the new firm for an onboarding plan

Explain why you want to move, without hiding record gaps or unresolved correspondence. Ask what information the new firm needs from you and what professional enquiries or handover requests it will make to the previous adviser.

Agree scope, contact arrangements and the first period the new firm will handle. If a filing deadline is close, get explicit confirmation that the provider can accept responsibility in time.

Prepare the record and access checklist

List accounts and returns already filed, balances, payroll records, asset schedules, outstanding correspondence and any unresolved questions. Ask both firms which items are relevant to your engagement.

Check who owns each software subscription and how permissions will be transferred. Preserve exports and records you need before access changes. Use proper invitations and official agent-authorisation processes instead of sharing personal login credentials.

Close the loop

Ask the incoming firm to confirm receipt of the agreed information and list any missing items. Update your deadline tracker with named owners and dates.

Keep written confirmation of the old engagement ending and the new one starting. A staged handover may be appropriate, but both firms and you should understand the boundaries.

Frequently asked questions

Must I wait until the year end?

Not necessarily. Choose a practical point based on your notice terms, outstanding work and the new firm’s capacity.

Is switching completed in a fixed number of weeks?

No. Timing depends on the records, outstanding work and access arrangements. Ask for a plan specific to your business.

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Sources and next steps

Official guidance supports the relevant rules and checks. Examples and comparison worksheets are TaxNuvia editorial guidance, not market research or provider quotes.

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<a href="https://taxnuvia.co.uk/blog/how-to-switch-accountants-uk">How to switch accountants: UK handover checklist</a> — TaxNuvia

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