If you’ve been in the game as long as I have, you’ll know that the only constant in the UK accountancy profession is change. Usually, it’s a bit of tax code tinkering or a new software update that promises to save you ten minutes a week. But what’s coming down the tracks from Companies House right now is a different beast entirely.
The Economic Crime and Corporate Transparency Act (ECCTA) is the biggest shake-up to corporate reporting we’ve seen in decades. And while some are treating it as just another compliance headache, I see it differently. As someone who spends every day talking to people looking to sell an accountancy practice or find the perfect practice acquisition, I can tell you: these shifts are going to change the value of your firm.
If you are a retiring accountant planning your exit, or perhaps looking into accountancy mergers & acquisitions to grow, you need to understand how data transparency is about to become a major player in your Accountancy Practice Valuation.
Let’s pull up a chair and chew the fat on what this actually means for you, your clients, and the eventual sale of your firm.
The End of the "Abridged" Era
For years, many small and micro-entities in the UK have enjoyed a certain level of privacy. Filing abridged accounts or choosing not to file a Profit and Loss (P&L) account was the standard. It kept the "nosey" competitors at bay and kept things simple.
Well, those days are numbered.
Under the new ECCTA reforms, small companies will be required to file a directors’ report, a balance sheet, and a full P&L. Micro-entities aren't escaping either: they’ll have to file both a balance sheet and a P&L.

From a practice valuation perspective, this is a double-edged sword. On one hand, it’s more work. On the other, it’s a massive opportunity to increase your recurring fees. If your clients want to stay compliant, they’re going to need more of your time and expertise. When I value a firm for a practice sale, buyers love seeing growing, non-negotiable recurring revenue. Firms that can demonstrate they’ve already transitioned their clients to these fuller disclosure requirements will naturally command a higher multiple.
The Digital Divide: Software is No Longer Optional
We’ve all seen the trend toward digital, but Companies House is now making it the law. We are moving toward mandatory digital / software-only filing. No more paper. No more basic web filing. We’re talking iXBRL tagging across the board, even for dormant accounts.
I’ve spoken to many owners of accountancy practices for sale who still rely on manual processes or older, non-integrated systems. I’ll be blunt: if you haven't embraced a fully digital workflow yet, you're leaving money on the table.
Accountancy practice buyers today: the serious ones, the ones with the deep pockets: are looking for "future-proofed" firms. They want to see that your tech stack is ready for the ECCTA era. If a buyer sees they’ll have to spend the first six months after an acquisition dragging your client base into the 21st century, they’re going to deduct that cost from your final price.
Identity Verification: You are now the Gatekeeper
Another massive shift is Identity Verification (IDV). Directors, People with Significant Control (PSCs), and anyone filing for a company will need to verify their identity. As an accountant, you can register as an Authorised Corporate Service Provider (ACSP).
This puts you in a position of trust, but also one of responsibility. You’ll be the one verifying that "Dave from the pub" is who he says he is before he starts his new consultancy.
For those looking to sell your practice, having robust AML (Anti-Money Laundering) and IDV processes is non-negotiable. During due diligence in an accountancy practice merger or sale, buyers are going to go through your AML files with a fine-tooth comb. If they find gaps, it’s a red flag. If they find a well-oiled ACSP machine, it’s a value-add.

Why Transparency Changes the Game for Valuations
You might be wondering, "Peter, why does a more transparent P&L affect what someone will pay for my firm?"
It’s all about the quality of the "book." When a buyer looks at a bookkeeping business for sale or a full-service firm, they want to know how "sticky" the clients are. In a world where every client’s financial performance is more visible, those clients are going to need more advisory services.
They’ll need help explaining their margins to suppliers, restructuring for tax efficiency, or preparing for their own eventual practice mergers UK style. A practice that provides high-level advisory alongside compliance is worth significantly more than a "compliance-only" shop.
According to the latest insights from ICAEW and Companies House, these reforms are designed to tackle fraud, but the side effect is a professionalisation of the entire small-business sector. If your firm is leading that charge, you are the one holding the cards.
A Word to the Retiring Accountant
If you’re a retiring accountant, you might be tempted to think, "I'll let the next owner deal with this."
I’d urge you to reconsider. The market for accountancy practices for sale is competitive. Buyers are savvy. They’re looking at competitors like Retiring Accountant and Vivian Sram just as much as they’re looking at my listings.
To stand out, you need to show that you haven't just "coasted" into retirement. You want to show a firm that is compliant, digital, and has successfully monetised these new reporting requirements. Increasing your fees now to reflect the extra work involved with full P&L filing and IDV doesn't just put more money in your pocket today: it increases the baseline for your Accountancy Practice Valuation tomorrow.

My Practical Tips for Preparing Your Exit
So, how do you get your firm "ECCTA-ready" for a sale? Here’s my no-nonsense checklist:
- Audit Your Tech Stack: Are you using software that handles iXBRL tagging natively? If not, it’s time to switch.
- Review Your Pricing: Don’t absorb the extra work of full P&L filing. It’s a value-added service. Price it as such.
- Formalise Your AML: Make sure your identity verification processes are documented and ready for the ACSP transition.
- Clean Up Your Own House: Ensure your own firm’s filings at Companies House are exemplary. You can’t sell a ship if the captain’s cabin is a mess!
- Talk to an Expert: Don't guess your value. Get a market-based, practical valuation from someone who understands the current UK climate.
Final Thoughts from Peter Watson
The shift in Companies House reporting isn't something to fear: it's something to prepare for. Whether you want to buy a practice, merge, or you're ready to hang up the calculator, these changes are going to be the benchmark for quality in our industry moving forward.
I’ve helped countless practice owners navigate the complexities of a practice sale or acquisition. I know how stressful it can be, especially when the goalposts seem to be moving. But remember, you don't have to do this alone. At Bains Watts, it's just me: no call centres, no juniors: just honest, experienced advice.

If you're thinking about the future of your firm, let's have a confidential chat. No pressure, just a bit of straight talk over a (virtual) cuppa.
Ready to discuss your firm's future?
Book a confidential discovery call with Peter Watson here.
Whether you’re looking at accountancy practice buyers or simply want to know where you stand in the current market, I’m here to help.