11 Best Audit Firms in Singapore (August 2026)

Beyond the brand, here is what actually matters when you choose an auditor.

• Do you need one. First confirm whether you are exempt as a small company. If you are, you may not need a statutory audit at all, though you still prepare financial statements and file your annual return and tax.
• ACRA-registered public accountant. A valid statutory audit can only be signed by an ACRA-registered public accountant through a registered firm. Ask for the signing accountant's name and verify it on the ACRA register.
• The right tier for your size. A small owner-managed company does not need a Big Four firm. Boutiques offer lower fees and direct partner attention, mid-tier firms suit established SMEs and groups or an IPO plan, and the Big Four are for listed and complex entities.
• Industry and niche experience. Some audits are specialised, such as a gross-turnover, charity or management-corporation audit. Choose a firm that knows your kind of engagement.
• Fees and timeline. Ask for a clear fee quote and a realistic timeline, and understand what drives the cost, mainly your transaction volume, complexity and the state of your records.

One tip: good, clean bookkeeping through the year is the single biggest thing that keeps your audit fee down and your audit smooth.

Fees track the firm tier and your complexity. Here is what to expect in 2026.

The main cost drivers are your transaction volume, group structure and how clean your records are, not just the firm's name. A boutique firm can audit a straightforward SME perfectly well and for far less than a Big Four firm, so match the tier to your actual needs.

I focused on firms an SME would realistically engage, so I leaned towards mid-tier and boutique practices rather than only the Big Four, and I checked that each is an ACRA-registered firm able to sign statutory audits. I spread the list across tiers so you can match the firm to your size, complexity and budget.

Details are checked when I publish and revisited as things change. Always confirm the signing public accountant, verify the firm on ACRA, and get a clear fee quote and timeline before you appoint an auditor.

Not necessarily. A private company is exempt from a statutory audit if it qualifies as a small company, which means meeting at least two of three criteria in each of the past two financial years: annual revenue of S$10 million or less, total assets of S$10 million or less, and 50 or fewer employees. For a group, the test is applied on a consolidated basis. If you qualify, you are exempt from the audit itself, though you still prepare financial statements, hold your AGM, and file your annual return and tax. Many small companies choose an audit anyway for banks, investors or tenders.

Only an ACRA-registered public accountant, signing through an ACRA-registered accounting entity, can perform and sign a valid statutory audit in Singapore. An audit signed by anyone who is not a registered public accountant is not a valid statutory audit, regardless of how it is presented. So before appointing a firm, ask for the name of the public accountant who will sign your audit and verify both the individual and the firm on the ACRA register. This is a simple, important check that protects you.

The Big Four are the four largest global accounting networks, and they audit most listed companies, large corporates and complex or high-profile entities, at premium fees. Mid-tier firms, like RSM, BDO and Baker Tilly, offer audit quality that is comparable for most purposes at noticeably lower fees, and they are well suited to established SMEs, groups and companies heading towards a listing. Boutique firms serve smaller, owner-managed businesses with direct partner attention and the lowest fees. For most SMEs, a mid-tier or boutique firm is the right fit, and a Big Four firm is unnecessary unless you are listed or complex.

A private company qualifies for audit exemption as a small company if, for the immediate past two consecutive financial years, it meets at least two of these three thresholds: total annual revenue of not more than S$10 million, total assets of not more than S$10 million, and not more than 50 employees. A newly incorporated company can qualify based on its first year. If the company is part of a group, the whole group must also qualify as a small group on a consolidated basis. The framework applies to financial years beginning on or after 1 July 2015. The exemption removes only the audit requirement, not the duty to prepare financial statements and file returns.

A company shortlisting audit firms in Singapore will look you up before anyone speaks to you, often several people independently.

They want to see relevant work, the certifications that apply, and some sign you have handled a company their size. B2B sites tend to be heavy on adjectives and light on proof, and that is the gap. I build websites for Singapore B2B firms that lead with the evidence, and I run the SEO so you show up for the specific searches procurement actually types.

If most of your pipeline is referral and you want inbound to pull its weight, tell me what you sell and I will give you a straight read.