How to Choose an Audit Firm in Singapore (2026 Director’s Guide)
By Lucas Seah, Founder of Excellence Singapore Group | Last Updated: June 2026
To choose an audit firm in Singapore, work through five steps: confirm you actually need an audit, verify the firm has a registered Public Accountant who will sign your report, match the firm’s size to your company, check it has relevant industry experience and a sound audit approach, and agree the scope, fee, and timeline in writing before you sign. Price matters, but a valid, well-run audit and a firm that fits your business matter more.
This director’s guide walks through each step, gives you a checklist to use before you engage, and lists the questions worth asking any prospective auditor.
Key Takeaways
- Check first whether you are exempt. A small private company that meets 2 of 3 tests across its last two financial years does not need a statutory audit at all.
- Only a Public Accountant registered with ACRA can sign a valid statutory audit. Confirm this before anything else.
- Match the firm to your company: a Big 4 firm fits listed and complex groups, while a mid-tier or boutique firm fits most SMEs at a fraction of the cost.
- Judge audit quality and partner attention, not just the quoted fee. The lowest quote is not always the cheapest audit.
- Get the scope, fee, and deadline in writing so there are no surprise charges later.
Step 1: Confirm You Actually Need an Audit
Before you shortlist any firm, check that an audit is required. A private company is exempt from a statutory audit if it qualifies as a small company, meaning it meets at least two of three tests (revenue of S$10 million or less, total assets of S$10 million or less, 50 employees or fewer) across its last two financial years. If it is part of a group, the group must also pass on a consolidated basis. A dormant company is exempt as well. Our guide to the small company audit exemption sets out the full test, including which companies must be audited. If you qualify, you can stop here and simply prepare unaudited financial statements.
The five-step selection path below assumes you have confirmed an audit is needed.
Step 2: Verify ACRA Registration (Non-Negotiable)
This is the one check you cannot skip. A statutory audit is only valid if it is signed by a Public Accountant registered with ACRA, working through a registered public accounting entity. ACRA registers these auditors, inspects their work through its Practice Monitoring Programme, and the audit is performed under the Singapore Standards on Auditing. Ask any prospective firm for the name of the Public Accountant who will sign your report, and confirm the person and the entity are ACRA-registered. If a firm cannot give you a clear answer, walk away: an audit signed by anyone else is not a valid statutory audit.
Step 3: Match the Firm’s Size to Your Company
Audit firms in Singapore fall into three tiers, and the right one depends on your company, not on prestige. The Big 4 (Deloitte, EY, KPMG, PwC) suit listed companies, complex groups, and businesses raising significant investment. Mid-tier firms such as RSM, BDO and Baker Tilly suit established SMEs and companies with group or regional reporting. Boutique firms suit small and owner-managed companies that want lower fees and direct partner attention. A mismatch usually means you either overpay for a name you do not need or stretch a firm that is too small for your complexity. Our guide to the best audit firms in Singapore compares the three tiers in detail, and you can sense-check the budget against our statutory audit cost guide.
Step 4: Check Industry Experience and Audit Quality
A firm that has audited businesses like yours works faster and spots more. Construction needs project and progress-billing experience, retail and trading need inventory and cash controls, and technology companies need revenue-recognition know-how. Beyond industry fit, judge audit quality, not just the fee. A good auditor takes a risk-based approach, flags weaknesses in your internal controls rather than only signing off, and keeps clear documentation. A suspiciously low quote can signal a rushed audit, so weigh what you get, not only what you pay. It is fair to ask a firm for references from clients in your sector and how long it has held them, since long client tenure is a good sign of quality.
Step 5: Ask Who Will Do the Work, and Agree the Terms
For an SME, partner involvement matters. Ask who will run your audit day to day, how experienced the seniors are, and whether any work is offshored. Then pin down the commercial terms before you commit: a fixed fee or a clear basis for variation, what triggers extra charges, and the timeline to meet your ACRA and IRAS deadlines. Scope creep and missed deadlines are two of the most common complaints we hear from SMEs about auditors, and a clear written engagement prevents both. If you are weighing accounting providers in parallel, the same discipline applies in our guide on how to choose an accounting firm.
A Checklist Before You Sign
Run through these before you appoint any audit firm. If you cannot tick all of them, keep asking questions.
| Before you sign, confirm | Why it matters |
|---|---|
| You have checked you are not exempt from audit | An exempt small company can skip the audit and the whole fee |
| A registered Public Accountant (ACRA) will sign the report | Only then is the statutory audit legally valid |
| The firm’s size fits your company | Avoids overpaying for a big name or stretching a firm too small |
| The firm has relevant industry experience | Faster work, sharper insight, fewer back-and-forth queries |
| You know who runs the audit day to day | Partner and senior attention matters most for an SME |
| The fee, scope, and triggers for extra charges are in writing | Prevents surprise bills and scope creep |
| The firm can meet your ACRA and IRAS deadlines | Late filing carries penalties you want to avoid |
Clean, well-kept books make every one of these steps easier and the audit cheaper. That is where reliable outsourced accounting and a solid accounting compliance routine pay off, especially when you have prepared for your financial year-end before the auditor arrives.
Frequently Asked Questions
Do I need an audit in Singapore?
Not always. A private company is exempt from a statutory audit if it qualifies as a small company, meaning it meets at least two of three tests (revenue of S$10 million or less, total assets of S$10 million or less, 50 employees or fewer) across its last two financial years, and its group passes too if it is part of one. Dormant companies are also exempt. Check your position before you appoint a firm.
How do I verify an audit firm is registered with ACRA?
Ask for the name of the Public Accountant who will sign your audit report and confirm that the individual and the public accounting entity are registered with ACRA. ACRA maintains the register and monitors audit quality. A valid statutory audit must be signed by a registered Public Accountant, so this is the first thing to confirm.
Should an SME use a Big 4 firm?
Usually not. A Big 4 audit is worth the premium for listed companies, complex groups, and businesses raising major investment. For a typical SME, a mid-tier or boutique firm delivers an equally valid statutory audit at a far lower cost and with more partner attention. Match the firm to your size rather than defaulting to a big name.
Can I change my auditor?
Yes. A company can change its auditor, and many do when fees rise, service slips, or the business outgrows a firm. There is a proper process to follow for the outgoing and incoming auditor, and a change is easiest at the start of a new financial year. Make sure the new firm is ACRA-registered and give it a complete handover to keep the first-year fee down.
How long does a statutory audit take?
For a small company with clean records, a few weeks is common once the auditor has everything it needs. Larger or more complex companies, groups requiring consolidation, and first-year audits take longer. The quality of your books is the biggest variable, which is why an early, complete handover speeds the whole process.
What questions should I ask before appointing an auditor?
Ask who the signing Public Accountant is, whether the firm has audited companies in your industry, who will do the day-to-day work, what the fee covers and what triggers extra charges, and whether they can meet your filing deadline. Their answers tell you as much about fit as the quote does.
Talk to Us
The hardest parts of choosing an auditor, knowing whether you need one and arriving with audit-ready books, are exactly where we help. Excellence Singapore confirms whether your company is exempt, prepares audit-ready accounts and financial statements, and liaises with your appointed auditor through the engagement. We are a corporate services firm, not a statutory auditor, so our guidance on which firm fits is independent. Talk to us before you appoint one.
