If you’ve been Googling how to switch accountants, the chances are something specific prompted it. Maybe emails go unanswered for days. Maybe your accounts were filed late. Maybe you’ve grown and your accountant hasn’t grown with you. Whatever the trigger, you’re not alone — changing accountant is one of the most common things we help people with.

The thing that stops most people from acting isn’t a logical reason — it’s inertia. Switching feels like a hassle, and there’s often a vague worry about what the current accountant will say or do. In our experience, that fear is almost always bigger than the reality. The process is largely handled between the two accountants, and the amount of time you personally need to invest is minimal.

This post walks you through how it works, when to do it, and what to look for before you commit to someone new.

There’s no single threshold that tells you it’s time to move on, but there are patterns we see repeatedly. The most common reasons business owners switch accountants are:

• Slow or inconsistent communication. If you’re regularly chasing for responses, that’s not a personality clash — it’s a service issue.
• Reactive rather than proactive advice. A good accountant doesn’t just file what you hand them. They flag opportunities, warn you about upcoming deadlines, and prompt you to act before it becomes urgent.
• Outdated software or manual processes. If your accountant is still working from spreadsheets or isn’t set up for Making Tax Digital, that’s a practical problem, not just a preference.
• Errors or missed deadlines. One genuine mistake, handled transparently, is forgivable. A pattern of errors is not.
• You’ve outgrown them. A sole trader accountant isn’t necessarily the right fit for a growing limited company with payroll, VAT, and management accounts to handle.
• Price. If you’re paying above the market rate for work that isn’t especially complex, that’s a reasonable basis for a change.

If more than one of these resonates, that’s usually a clear enough signal. The more interesting question is whether you’ve communicated the issue to your current accountant first — sometimes the relationship can be salvaged with a direct conversation. But if you’ve already tried that, or if the issue is consistent rather than isolated, moving on is the sensible decision.

This is where most people’s expectations and the reality diverge. Switching accountants involves less client effort than almost anyone anticipates.

In broad terms, here’s how it works:

1. You appoint a new accountant and sign an engagement letter, which sets out the scope and terms of the new relationship.
2. You notify your outgoing accountant — either by signing a disengagement letter or simply sending a short written notice. Check your current engagement letter for any notice period. Most reputable practices operate on rolling monthly contracts with 30 days’ notice; exit fees are rare and generally a sign of a firm you’re right to leave.
3. Professional clearance takes place. Your new accountant writes to your old one asking for any information relevant to taking on the engagement. The outgoing accountant is professionally obliged — under ICAEW ethical guidance — to respond honestly and promptly. They cannot withhold your records or obstruct the transfer without good reason.
4. Your records are handed over. This typically covers the last set of filed accounts, outstanding bookkeeping, any HMRC correspondence, and login details for cloud accounting software where relevant.
5. Your new accountant is authorised with HMRC. They’ll handle this via HMRC’s online agent authorisation service, or using form 64-8 if needed. Once authorised, they can deal with HMRC on your behalf across Self Assessment, Corporation Tax, VAT, PAYE, and CIS.

Your personal involvement in most of this is limited to signing a couple of documents and making an introduction. The rest is handled between the firms.

This step trips people up more than it should, so it’s worth being specific about how it works.

HMRC operates an agent authorisation system that allows a qualified agent to act on your behalf. Once authorised, your new accountant can submit returns, make claims, view your tax account, and correspond with HMRC directly — without you needing to be the middleman on every exchange.

There are two routes:

• Online authorisation — the quickest option. Your new accountant initiates the request through HMRC’s online service, and you confirm it through your Government Gateway account. This is how most modern practices handle it.
• Form 64-8 — the paper route, used where online access isn’t set up or for certain specific taxes. Your accountant provides the form; you sign it and it’s submitted to HMRC.

The authorisation covers the taxes relevant to your situation — Corporation Tax, Self Assessment, VAT, PAYE, CIS, and Making Tax Digital are all handled through the same framework, though each may require a separate authorisation step.

One thing to note: removing your old accountant’s agent access is a separate action. Your new accountant can advise on this, but it’s worth ensuring it’s done cleanly once the transition is complete, so there’s no confusion about who has authority to act for you.

We often get asked whether you should wait until your year-end before switching accountants. The honest answer is: it helps, but it isn’t essential.

Switching immediately after your financial year-end is the tidiest option — your outgoing accountant completes the last set of accounts, and your new accountant picks up from a clean point. There’s a clear handover and no ambiguity about who prepared what.

That said, mid-year switches are entirely possible and sometimes the right call — particularly if there’s an active problem (an error, a deadline at risk, or a relationship that has completely broken down). In those situations, waiting six months to reach a convenient year-end is likely to cost you more than the slight untidiness of a mid-year transition.

If you do switch mid-year, your new accountant will need to reconstruct the year-to-date position from whatever records are handed over. This is manageable work for a competent practice — it just needs to be scoped clearly at the outset so everyone knows what’s included and what it’ll cost.

The short version: if things are working adequately, wait for year-end. If things are actively going wrong, switch now and deal with the transition — the disruption will be less than you expect.

Once you’ve decided to switch, choosing the right replacement matters as much as leaving the right way. Here are the questions we’d encourage anyone to ask a prospective accountant:

• What are your qualifications? Look for recognised professional qualifications — ACA, ACCA, CIMA, or CTA depending on the work involved. Unqualified bookkeepers do excellent work, but if you need statutory accounts and tax advice, you want a qualified accountant.
• What’s your typical response time? If they can’t give you a clear answer, that tells you something.
• Do you have experience in my sector? Not all businesses are the same. A contractor, an e-commerce seller, and a restaurant have very different accounting needs. Sector experience matters.
• What software do you use? Cloud-based platforms like Xero, QuickBooks, and FreeAgent make collaboration far easier. If a prospective accountant isn’t on one of these, it’s worth understanding why.
• What’s your fee structure? Fixed fees give you certainty; hourly rates create anxiety. Understand what’s included and what triggers additional charges.
• What’s your exit policy? A firm that’s confident in its service won’t trap you with long contracts or exit fees.

At Wings, we’re happy to answer all of these upfront — and if our answer on any of them doesn’t suit your situation, we’ll tell you honestly.