When to Change Your Accountant as a Growing Business

Claire Hancott
5 days ago
5 min read

There's a particular kind of frustration that a lot of growing business owners carry around quietly. The accounts get filed. The VAT return goes in. Nothing is technically wrong. But when a big decision comes up, you don't think to call your accountant. When you look at your numbers, you don't quite trust them. When you ask a question that matters, you get an answer that's technically correct but practically useless.

That's not an accountant problem. That's an outgrown-your-accountant problem. And for most business owners pushing toward or past the million-pound mark, it's more common than they'd like to admit.

Episode 117: Changing Accountants Is Not As Hard As You Think (Even At 7 Figures)

Why Business Owners Put Off Changing Accountants

The honest answer is inertia. Not laziness, inertia. When something isn't actively on fire, it's hard to prioritise fixing it. Especially when the thought of switching feels complicated, disruptive, and vaguely disloyal.

Business owners who've been with the same accountant for years, sometimes through a personal introduction or a family recommendation, often describe a version of the same feeling: "They're fine. They do what I need. But I'm not getting what I actually want." The gap between fine and genuinely useful gets absorbed into the cost of running the business, invisible until something forces the comparison.

There's also the fear that the old accountant holds something you can't get back. Years of history. Context. Institutional knowledge stored in someone's head rather than a file. That fear is understandable, but in most cases, it's overstated. A good incoming accountant knows how to request and recover the information they need, including routes directly through Companies House, HMRC, and your accounting software provider. You don't need to navigate that yourself.

And then there's the "better the devil you know" factor. Which is, frankly, the most expensive mindset a growing business owner can hold.

The Hidden Cost of Staying With the Wrong Accountant

A traditional compliance accountant does what it says on the tin. They file your accounts. They keep you out of trouble with HMRC. They process your VAT. For a small business in its early years, that's often exactly what's needed.

But as a business grows, the work that actually drives performance sits outside that scope. Management accounts. Cash flow forecasting. Profit planning. Knowing your real numbers well enough to make confident decisions. Being pulled into the big calls before the decision is made, not after.

The moment it crystallises is usually something specific. A major hire they made without running the numbers properly. A cash flow squeeze that shouldn't have been a surprise. A question about what the business is actually worth, met with a vague answer. It's rarely a dramatic falling out. It's more often a quiet realisation that the person they're paying to be across their finances wasn't across them at all.

The thing is, most business owners at the seven-figure stage aren't getting those things. They're paying compliance rates and wondering why their accountant never seems to add much value. They look at their P&L and feel vaguely uneasy without quite knowing why. They make major financial decisions, acquisitions, hiring rounds, equipment purchases, without involving their accountant because they've never thought of them that way.

It comes up constantly when we talk to business owners who describe realising, mid-conversation, that they've been making major commercial decisions for years without the numbers to support them. Not because the numbers didn't exist, but because nobody was building them in a useful way.

Is Now the Right Time to Change Your Accountant?

For most business owners, there's a specific moment that makes the question real. A decision they made without their accountant's input, not because they forgot to ask, but because they've stopped thinking of them as someone who'd add anything useful. Or a question that came back technically correct but practically useless. That moment tends to stick. And once you've noticed it, it's hard to un-notice.

The myth that you have to wait until year end to change accountants is worth unpicking here. Waiting can mean another nine months of decisions made without proper financial visibility.

The cleanest time to move is the first day of your new financial year, but even that isn't a hard rule. Businesses can and do switch at any point. If you're primarily after FD-style services, management accounts, forecasting, financial strategy, you can often start that work immediately while leaving the year-end compliance with your existing accountant until it's tidy to transfer.

Some businesses run both indefinitely. They keep a year-end accountant they're happy with and layer a fractional FD service on top. That's a legitimate structure, and a good advisory firm won't pressure you to do it any other way.

What Actually Happens When You Switch

For most business owners, the fear of switching is significantly worse than the process itself. Here's what it actually looks like when you move to a chartered accountancy firm.

Step One: Engagement Letter and AML

Your new accountant issues an engagement letter, a digital document covering the services being provided and the terms. You sign it electronically. Alongside this, they send an anti-money laundering check, a legal requirement for all regulated accountancy firms. It takes a few minutes on your phone. That's your job done for this stage.

Step Two: Access to Your Software

If you're on Xero, QuickBooks, or similar, you simply grant your new accountant access. They do the rest. If a software migration is needed, a good firm handles that for you.

Step Three: Professional Clearance

Your new accountant writes directly to your old one. This is called professional clearance. It's a formal, regulated process between firms. Your old accountant is legally required to respond and cannot withhold information without a legitimate reason. If they're unresponsive, your new accountant can escalate. They've done it before. You won't need to chase anyone.

All the historical records your old accountant holds, statutory accounts, tax returns, software data, can be obtained through multiple channels even in the event of non-cooperation. You are not beholden to a difficult accountant's goodwill.

From the point you sign an engagement letter to being fully onboarded is often a matter of days for an organised firm.

How to Know It's Actually Time

If any of the following is true, it probably is.

You're north of half a million in turnover and your accountant's typical client is a sole trader or small lifestyle business. You're in the top five percent of their portfolio — a specialist case for a generalist firm. That gap affects the quality of advice, the relevance of their experience, and the processes they've built to serve you.
You make significant decisions without thinking to involve your accountant. Not because you forgot, but because you've never thought of them as someone who adds value to that conversation.
You look at your numbers and feel uncertain about what they're actually telling you.
You can't remember the last time your accountant flagged something proactively, suggested something, or pushed back on a decision.
When their newsletter lands, it's about tax deadlines — not about growing your business.

These aren't minor complaints. They're signals that the relationship has become compliance-only. And compliance-only, at the scale you're operating, is leaving money and opportunity on the table.

One Last Thing

The cost of staying too long with the wrong accountant is real but invisible. You don't see it on a P&L. You feel it in decisions made without good data, in growth that's slower than it should be, in cash flow surprises that shouldn't have been surprises.

The switch itself is almost always easier than the thing that stopped you making it.