Switching accountants is one of those things that business owners think about for months before actually doing anything. The fear is usually the same: will it be disruptive? Will there be an awkward conversation? Will something fall through the cracks during the handover? We hear this regularly from new clients who came to us after years of tolerating a relationship that simply wasn’t working.

The honest answer is that switching accountants, done at the right time and in the right way, is usually straightforward. The administrative process is well-established, HMRC authorisations transfer cleanly, and a good incoming accountant will lead the handover so you don’t have to manage it yourself.

What we want to do in this post is be direct about the signs that it’s time to move, when to do it, and what actually happens when you do. No scaremongering, no false reassurance — just a clear-eyed look at the process.

There’s no single moment that tells you it’s time to go — it tends to be a slow accumulation. But there are patterns we hear about consistently, and they’re worth naming clearly.

You only hear from them at deadline time

If the only time your accountant gets in touch is when they need something from you — a document, a signature, a bank statement — that’s reactive, not proactive. A good accountant should be flagging things before they become problems: a tax payment coming up, a change in the law that affects your business, an opportunity to plan ahead. The absence of that kind of contact is itself a signal.

You don’t understand what you’re paying for

You should be able to look at your accounts and understand what they’re telling you. If every interaction with your accountant leaves you more confused than when you started, something’s wrong. It might be communication style, it might be that they’re not taking the time to explain — but either way, you’re not getting the clarity you’re paying for.

Mistakes and missed deadlines

One error is human. A pattern of errors, or a late filing that led to an HMRC penalty, is a different matter. Your accountant carries a duty of care to keep your affairs in order and to keep you informed of anything that affects you. If that isn’t happening, you’re exposed.

You feel like a small fish

Larger firms sometimes take on owner-managed businesses and then deprioritise them. If you struggle to get responses, if your contact changes regularly, or if you feel like an afterthought, that’s a relationship worth reassessing.

Timing matters, but it’s not as restrictive as people assume. The conventional wisdom is that just after your company’s year-end is the cleanest point to switch — accounts are finalised, the handover paperwork is straightforward, and the new accountant picks up from a clear starting point. For most limited companies, this is the natural seam in the year.

What we’d generally suggest avoiding is the period between December and January, when Self Assessment deadlines create pressure for everyone. Switching during that window can complicate things unnecessarily — both for you and for any firm you’re moving to.

That said, there’s an important exception: if your accountant is actively making mistakes, missing deadlines, or creating risk for your business, don’t wait for a tidier moment. The cost of another six months of poor service — financially and in terms of stress — almost always outweighs the slightly messier handover. We’ve taken on clients mid-year with no issues at all.

The other timing question is whether you need to give notice. Most accountant contracts include a notice period, typically one to three months, so it’s worth checking your engagement letter before you commit to a start date with a new firm. A reputable incoming accountant will factor this in when planning the transition.

This is where a lot of the anxiety lives, and it’s largely unfounded. Here’s what normally happens in practice.

You authorise the new accountant with HMRC

Your new accountant will ask you to authorise them as your tax agent through your HMRC business tax account or personal tax account, depending on which taxes are involved. For VAT and Making Tax Digital services, the process uses a digital handshake — you grant access online in a few clicks. For Corporation Tax and Self Assessment, you navigate to the agent management section of your business tax account. The old authorisation is removed through the same portal, or your new accountant can handle it on your behalf once you’ve authorised them.

Your existing accountant passes over the records

There is a professional obligation for your outgoing accountant to provide a handover to your new firm. This includes your accounts, tax returns, workings, and any correspondence with HMRC. Some firms are quicker about this than others, but the obligation exists. A good incoming accountant will chase this on your behalf so you don’t have to manage an awkward conversation.

You sign a new engagement letter

Once you’ve chosen a new firm, you’ll receive an engagement letter setting out what’s covered, the fees, and the terms. Read it carefully — in particular the scope of services and the notice period. This is also a good moment to be clear about what you want from the relationship going forward.

The whole process, from decision to fully operational with a new accountant, typically takes two to four weeks when everything moves smoothly.

Switching accountants is only valuable if the firm you move to is genuinely better suited to you. A few things worth thinking through before you commit.

Proactivity. Ask them directly: how do you keep clients informed throughout the year? What does year-round support look like in practice? The answer tells you quickly whether you’re dealing with a reactive compliance shop or a firm that’s genuinely invested in your business.

Relevant experience. A general practice is fine for many businesses. But if you’re a contractor, a property investor, a trades business, or an e-commerce seller, there are nuances to your tax position that a specialist understands faster and handles better. Ask whether they work with businesses like yours regularly.

Communication style. This one matters more than it sounds. If an accountant talks in jargon, doesn’t return calls promptly, or makes you feel stupid for asking a basic question, that relationship will erode over time. You should feel comfortable asking anything.

Clarity on fees. Know what you’re paying and what it covers before you sign. Unexpected charges for things you assumed were included is a common frustration — and a clear engagement letter from the outset prevents most of it.

The initial conversation with any accountant should be free and without pressure. Use it. Ask the questions that matter to you, and pay attention to how they respond, not just what they say.