Who Are the Big 5 Audit Firms?

The phrase people are reaching for is Big Five, and it has been historical since 2002.

The US Government Accountability Office put both lists on the record in its 2003 study of audit market concentration. Footnote 8 of GAO-03-864 states that "the Big 5 were Andersen, Deloitte & Touche, Ernst & Young, KPMG, and PricewaterhouseCoopers"; footnote 2 gives the survivors as "Deloitte & Touche LLP, Ernst & Young LLP, KPMG LLP, and PricewaterhouseCoopers LLP". Those are the 2003 legal entity names; the brands are now Deloitte, EY, KPMG and PwC.

GAO describes the sequence in one sentence: the number of firms considered capable of auditing large multinational companies fell from eight in the 1980s to four, "the result of mergers involving six of the top eight firms since the late 1980s and the abrupt dissolution of Arthur Andersen LLP (Andersen) in 2002".

Andersen was Enron's auditor. A Houston jury convicted the firm of obstruction of justice on 15 June 2002, and the SEC's announcement the same day recorded that Andersen had informed the Commission it would cease practising before it by 31 August 2002. So there is no fifth firm waiting to be named, and a page that supplies one has invented it.

One detail is almost always left out, and it is the part worth carrying away. The conviction did not survive. In Arthur Andersen LLP v. United States, 544 U.S. 696, decided 31 May 2005, the Supreme Court held that the jury instructions "failed to convey properly the elements of a 'corrup[t] persua[sion]' conviction" and reversed. The firm was vindicated three years after it had already ceased to exist — an audit practice of that size does not survive long enough to be exonerated.

This is a real and common search, and the honest answer is that there is nothing authoritative to give you. Checked against moet.gov.ae, mof.gov.ae and tax.gov.ae on 21 August 2026, no UAE authority ranks audit firms, endorses them, or publishes a methodology by which they could be ranked. The Ministry of Economy and Tourism licenses them; it does not grade them.

Nor is "Big Ten" a category anywhere else. Regulators group audit firms by inspection regime rather than by rank — the PCAOB, the US audit regulator, inspects in Global Network Firm and Non-Affiliate Firm categories, and GAO's 2003 study refers to everything below the Big 4 simply as "any of the other more than 700 firms that audit public companies". Neither publishes a top ten.

Where lists do exist they are trade-press surveys of global network fee income — which says nothing about who will do your UAE engagement or who may sign it — or they are marketing, usually written by a firm that appears on its own list. This firm will not add another. We cannot verify another practice's revenue, headcount or quality, and a ranking built from what firms say about themselves is advertising with a number on the front. The checks below are what it stands in for, and they are verifiable.

All four networks are present in the Emirates, and being present is not the same as being permitted to sign. Under Federal Decree-Law No. 41 of 2023, practising the profession in the State requires a professional licence issued by the Ministry, and that licence attaches to a named natural person, not a network. A global brand cannot lend it to a local office.

Article 6(3) sets out the forms a firm may lawfully take here: a professional company of two or more Chartered Accountants; a professional company between Chartered Accountants and an international accounting firm; a branch of a foreign accounting firm; or another form the Executive Regulation determines. So a network is here either as a licensed branch or as a UAE professional company with the network as a partner — two different legal animals behind one logo.

The corollary bites hardest at the other end of the market. A trade name ending in "Chartered Accountants" is a naming decision made at registration. Article 8(2) says the designation may not be used unless the professional licence has been obtained from the Ministry — so the words in a firm's name are no evidence that anyone inside it holds one.

Start with the gap, because most advice on this point describes a facility that is not there. On 17 August 2026 no public searchable register of licensed Chartered Accountants could be found on the Ministry of Economy and Tourism's site. The registration service cards are published, and so is a channel for complaining about an auditor or accounting firm, but there is no lookup you can type a name into.

Ask the firm instead for the licence details of the individual who will sign. If your company sits in a free zone, the zone's approved-auditor list is the operative filter — DMCC publishes a live register, and its Company Regulations permit only a DMCCA-approved auditor to be appointed. Most zones run an equivalent list. Check it with the zone on the day you engage; those lists change without notice.

For most UAE companies the statutory requirement is an auditor, not a large one. Article 245 of the Commercial Companies Law requires the general assembly to appoint one or more auditors, and Article 246 sets the conditions they must meet; neither mentions size, network or brand.

On the tax side, Ministerial Decision No. 84 of 2025 sets who must prepare audited financial statements for corporate tax: taxable persons with revenue above AED 50,000,000 in the tax period, and every qualifying free zone person regardless of revenue, for tax periods commencing on or after 1 January 2025. It says audited; it does not say by whom.

A Big Four appointment earns its fee where a third party demands it: a lender, an acquirer, a group auditor consolidating your numbers overseas, or a listing. If nobody in your capital structure is asking for the name, you are buying it for yourself — and the question reverts to the one everyone should ask. Is the individual signing licensed to sign, and will your bank and free zone accept the report.