Audit and Assurance Services for UK Businesses
- Big 4 and Top 10 trained auditors
- Registered on the UK Audit Register
- Statutory, external, compliance and financial services audits
UK companies above the small-company thresholds must have their financial statements audited by a registered auditor. MMBA is a chartered certified accountancy firm and a registered audit firm, listed on the UK Audit Register, with 4 offices in UK. Across our services, audit is the work that most often decides whether a lender, an investor or a regulator will accept your numbers.
We provide statutory and external audits for regulated and non-regulated businesses across the UK, meeting your Companies Act 2006 obligations and giving those readers an auditor’s report they can rely on. Our registered auditors work across sectors, assess audit risk, and report against the applicable financial reporting framework.
How MMBA Conducts an Audit
MMBA applies a structured audit methodology built on objective risk evaluation and regulatory compliance. Our work delivers independent findings that stand up to regulators, lenders and boards.
- Independent audit reports for your sector
- Compliance with financial reporting standards and future regulation
- Complete transparency in reporting to stakeholders
- Professional standards applied to deliver high audit quality
- Dedicated support from Big 4 and Top 10 trained auditors
- Transparent, accountable operations throughout the engagement
We audit against International Standards on Auditing (UK) and report under the framework that applies to your accounts, whether that is FRS 102, FRS 101 or IFRS. Where your company heads a group or is a UK subsidiary of an overseas parent, we act as component auditor and agree the scope of work with the group auditor before testing begins.
Before fieldwork begins, we run pre-audit checks and a compliance gap review, review reconciliations, management accounts and prior-year audit findings, and align your accounting records with your statutory records, so that a first audit or a year of structural change runs without surprises. Audit-ready accounts shorten fieldwork and reduce the number of questions your finance team has to answer twice.
MMBA’s assurance work is audit-based, covering statutory and external audits, financial audits, charity audits, compliance and FCA audit work, internal controls reviews, and SRA Accounts Rules reporting for law firms. We do not provide the internal audit function, IT audit or ESG assurance.
Which Audit Does Your Business Need?
If you are not sure which applies, that is normal. Start with the thresholds or talk to our specialist.
Statutory Audit
A statutory audit is required under the Companies Act 2006 once your company no longer qualifies for audit exemption, and required regardless of size where your Articles, shareholders or lenders call for one. Ends in a signed auditor’s report on your statutory financial statements, accepted by Companies House.
External Audit
An external audit is an independent examination of your financial statements by an auditor outside your business, using substantive and analytical procedures to gather audit evidence and form an opinion on material misstatement. Used where a regulator, lender or investor wants verification rather than where the law compels it.
Compliance Audit
Compliance audit tests your systems, policies and controls against a specific regulatory framework rather than against your accounts. Used ahead of a regulator inspection or to close control gaps before they become findings.
Financial Services Audit
For FCA-regulated firms, including CASS 5 and CASS 7 client money and client asset audits, safeguarding work for electronic money and payment institutions, and audits for banks, insurers, asset managers and wealth firms reporting under IFRS or UK GAAP.
Not sure which of these applies to you?
Book a call with an audit specialist. Fifteen minutes is usually enough to confirm whether you need an audit, which type, and what it would involve.
Why Choose MMBA as Your Audit Firm
MMBA's audit practice is built on years of experience, technical expertise, and a commitment to high standards.
Registration you can verify before you call
MMBA is listed on the UK Audit Register under our ACCA registration. Only a registered auditor can sign a report Companies House, your bank or an investor will accept.
Specialist knowledge of UK audit regulations
We stay updated with evolving audit regulations, financial reporting standards, and industry developments to deliver proactive advice.
Decades of audit experience across industries
Our firm has supported businesses for years with statutory audits and audit readiness assessments. Our auditing team comprises competent and trained auditors.
Audit quality and independence at the core
Our audit work is independent, thorough, and compliant with the rules governing audit. We maintain professional standards in every review.
Customised audit strategies for every business
Every company has unique requirements. We adapt our approach to your risk profile, industry, and stakeholder needs.
Trusted by UK companies and their lenders
From SMEs to large enterprises, we are proud to be a trusted audit partner. We have helped companies meet their obligations and protect their reputations.
What Our Clients Say on Google
What Happens During Your Audit?
Every MMBA audit follows the same process, whether it’s your first audit or your tenth.
Initial assessment
We talk through your business, your regulatory position and the reporting framework that applies, then agree the audit scope.
Scope and fee proposal
You receive a tailored scope and fee proposal, agreed in writing once we understand your requirements, before any work begins.
Audit planning
We set materiality and assess audit risk, identifying the areas that need the most testing based on your business.
Evidence and testing
Substantive and analytical procedures against your records, transactions, reconciliations and internal controls, gathering the audit evidence.
Financial statement review
Your audit specialist reviews the fieldwork, assesses the statements against the applicable reporting framework, and forms the opinion.
Completion and reporting
We resolve audit findings with you and issue the signed report, ready for Companies House, your bank or your investors.
Sectors We Audit
Companies choosing a registered audit firm need more than procedural compliance. Our audit work concentrates on sectors where the accounting treatment, rather than the testing, is the demanding part, and where an audit is often required, whatever the size of the business.
- Financial Services for FCA-regulated firms, fintech businesses, electronic money institutions and payment institutions, including CASS and client money and client asset audits and safeguarding work. Regulation rather than turnover is what triggers the requirement here, and a client money audit reaches further than the accounts.
- Solicitors and law firms where holding client money brings reporting obligations that shape the scope of the engagement.
- Healthcare for GP practices, dental groups, pharmacies and care homes, each with its own funding and reporting structures.
- Property and Real Estate for landlords and property businesses, where asset values push a company past the thresholds well before turnover does.
- Digital Assets covering audit and financial reporting for cryptoasset and blockchain businesses, including the valuation and audit evidence questions specific to digital assets.
Across all of them, the pattern holds. Specialist accounting is handled by a named audit specialist who signs the report.
The Team Behind Every Audit
MMBA is a firm of Chartered Certified Accountants and Registered Auditors, and every audit is led by a specialist who stays with it from planning through to sign-off rather than a name that changes partway through. The person who scopes your audit is the person who signs the report. MMBA was founded in 2009, and our directors bring more than 40 years of combined Big 4 and Top 10 experience, with an audit team trained at KPMG, EY, BDO, RSM and Azets, and experience auditing large, listed and group entities from four offices in London, Preston, Cambridge and Luton, serving clients throughout the UK, including audit services in London. You can see the credentials of our audit team before you appoint anyone, and our case studies show how the same specialist-led process applies across regulated, digital asset, property and medical engagements.
MMBA’s Audit and Assurance Resources and Knowledge Base
The MMBA Accountant offers a fantastic opportunity to stay updated with the most recent news and guidance
All You Need to Know About the Major Changes to UK GAAP FRS 102 and Its Impacts
Frequently Asked Questions
What are MMBA's core audit and assurance services?
MMBA provides four audit types. Statutory audits required under the Companies Act 2006, external audits giving independent verification of your financial statements, compliance audits testing your systems against a regulatory framework, and financial services audits for FCA-regulated firms including CASS 5 and CASS 7 client money engagements.
Does my company need a statutory audit?
For financial years beginning on or after 6 April 2025, a private limited company may be exempt if it meets at least two of three tests: turnover of no more than £15 million, assets of no more than £7.5 million, and 50 or fewer employees on average. The conditions normally have to be met for two consecutive financial years, and a company that exceeds them has to do so for two consecutive years before losing the exemption. A company in its first financial year is judged on that year alone. FCA or PRA regulation, group membership, a requirement in your Articles or a shareholder request can each require an audit regardless of size.
Why choose MMBA as your audit partner?
Our audit approach combines independent review, regulatory compliance, detailed reporting, and practical insight, delivered by a named specialist who stays with your engagement from planning to sign off.
How do your audit services help with investor confidence?
Our audit reports build trust with investors and stakeholders through accurate reporting, clear risk analysis, and adherence to UK auditing standards.
How does MMBA help businesses prepare for a first audit?
We assess the likely impact of regulatory change on your reporting well before your filing deadline. If you are applying for funding, going through a tender, or approaching the thresholds for the first time, we make sure your accounts and records are audit-ready.
Do you help companies comply with new financial reporting standards?
Yes. Our team stays updated with UK GAAP, IFRS, and other financial reporting standards so your business remains compliant with evolving rules. These standards define the scope, structure, and disclosure requirements of your financial reporting.
What documents do you need for an audit?
We work from your accounting records and the evidence behind them: the general ledger, bank reconciliations, sales and purchase records, payroll and VAT returns, asset and liability schedules, related-party transactions, your accounting policies and any prior-year audit findings. We send a document request at the planning stage so nothing is chased twice.
What exactly is audit and assurance?
Audit and assurance are independent professional work that makes financial and non-financial information reliable enough for someone outside the business to act on. The audit is the regulated form of it, covering the full set of financial statements. Assurance is the wider category that audit sits inside. MMBA’s assurance work is audit-based: see which audit applies to your business.
What is the difference between audit and assurance?
An audit covers your full financial statements and can only be performed by a registered auditor, ending in a formal opinion on whether they give a true and fair view. Other assurance engagements cover a defined part of your business, such as a grant claim or a set of controls, and can be performed by a qualified practitioner. Every audit is an assurance engagement; not every assurance engagement is an audit. Read the full comparison.
What are the two types of assurance?
Assurance engagements are either reasonable or limited. A reasonable assurance engagement, such as a statutory audit, involves enough work for the practitioner to give a positive opinion that the information is free from material misstatement. A limited assurance engagement involves less work and gives a negative form of conclusion, stating that nothing came to the practitioner’s attention to suggest the information is misstated. An audit is always a reasonable assurance engagement, so if you need one, check whether your company qualifies for exemption.