Helping organisations make better business decisions.
Acumon is an independent accounting and business advisory firm providing audit, tax, accounting and strategic advisory services to businesses, charities, regulated firms and public sector organisations. Combining technical excellence with commercial thinking, we help clients navigate complexity, manage risk and build sustainable success.
- ICAEW Registered Audit Firm
- 100% UK-Based Team — No Offshoring
- Fixed, Transparent Fees
Speak to a Specialist
Tell us what you need — a qualified accountant will get back to you within one business day.
Thank you — we've got it
A qualified accountant will be in touch within one business day. Prefer to talk now? Call 020 8567 3451.
Every Financial Service Your Business Needs
One firm, one point of contact, complete coverage — from day-to-day bookkeeping to PLC audits and complex tax planning.
Audit
Statutory, charity and specialist audits — including PIE audits signed off by our FRC-qualified Responsible Individual.
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Accounts & Bookkeeping
Year-end accounts, bookkeeping and management accounts — always accurate, always on time.
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Tax
Personal and corporate tax planning from a team with ex-HMRC insight.
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VAT
VAT registration, returns, planning and investigations — UK and international.
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Risk & Technology Assurance
Internal audit, cybersecurity and governance that protect your business.
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Advisory
M&A, due diligence, valuations and succession planning at partner level.
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Payroll
Payroll, PAYE, CIS and pension administration — right, every time.
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Business Support
Hands-on advisory and reporting that turn numbers into decisions.
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Company Secretarial
Companies House filings and governance handled for you.
Explore Company Secretarial →The Credentials of a Big Firm.
The Attention of a Small One.
Most firms make you choose between capability and personal service. We built Acumon so you don't have to.
100% UK-Based Team
All 90+ of our professionals work from the UK. Your accounts are never offshored, and the person you speak to is the person doing the work.
Registered Audit Firm — Including PIE Audits
We're ICAEW-registered auditors with an FRC-qualified Responsible Individual able to sign off Public Interest Entity audits — a level of authorisation few firms our size hold.
Ex-HMRC Tax Insight
Our tax team includes professionals with HMRC experience. We know how the Revenue thinks — and we use it to keep you compliant and tax-efficient.
Fixed, Transparent Fees
You get a clear quote before we start, and that's what you pay. No hourly-rate anxiety, no surprise invoices at year end.
In-House Technology Team
Since 2020 we've run our own software development team, building bespoke tools and automations most accountancy firms simply can't offer.
Partner-Led Service
Every engagement has partner-level oversight and a named accountant as your day-to-day contact. You're a client, not a ticket number.
Decades of Heritage. Built for What's Next.
Acumon began life as Johnsons Chartered Accountants, a respected West London practice. As we grew — in people, capability and ambition — we became Acumon: the same rigorous standards, now with the scale to serve everyone from ambitious startups to listed companies.
Today we're a team of 90+ UK-based professionals in Ealing, London, trusted by businesses, charities and individuals across the country.
- Regulated by the ICAEW — audit, accounts and probate
- Experience across technology, manufacturing and non-profit sectors
- Transparency reports and full regulatory documentation published
Rated 5.0 by Business Owners Across the UK
Every one of our reviews is a five-star rating. Here's what a few clients say about working with Acumon.
“Acumon tells you what you need to hear, not what you want to hear. In my entire business career, this is the best accountancy firm I've dealt with — flexible and extremely helpful.”
“I've dealt with Acumon for 10 years, and they've been far more than just accounting for me. The staff are helpful and friendly, I'm always happy with their advice and service, and there's nothing they can't solve.”
“We're delighted with Acumon's friendliness and willingness to help. They've been our accountant and financial advisor since we began operations, with prompt assistance on every call. We highly recommend them to anyone wanting a proactive accountant.”
Switch Accountants Without the Headache
Worried that changing accountants is a hassle? It isn't — we do the heavy lifting.
Speak to a Specialist
A 30-minute call with a qualified accountant — not a salesperson. We'll understand your situation and tell you honestly how we can help.
Get Your Fixed-Fee Plan
You receive a tailored proposal with clear scope and a fixed price. No pressure, no obligation — decide in your own time.
We Handle Everything
We manage the entire switch, including contacting your previous accountant. Most clients are fully onboarded within days.
Frequently Asked Questions
How much do your accounting services cost?
Is it easy to switch from my current accountant?
Are you a registered audit firm?
Do you work with businesses outside London?
Who will actually look after my account?
Ready for Accountants Who Move Your Business Forward?
Tell us what you need. Within one business day, a qualified accountant will be in touch to talk it through and give you a clear, fixed-fee quote — no obligation.
Speak to a Specialist
Fill this in and we'll come back to you within one business day.
Thank you — we've got it
A qualified accountant will be in touch within one business day. Prefer to talk now? Call 020 8567 3451.