Audit fees are priced on risk and hours, and both are mostly set before the auditor arrives, by the state of the books. A small proprietary company with clean, reconciled, well-documented accounts might clear its audit for $10,000 to $20,000; the same company with a messy ledger, unreconciled balances and no supporting schedules can pay half as much again for the same opinion, because every gap in the books becomes billable audit hours. This guide lays out the fee ranges by entity type and size, what actually drives an audit quote, the specialist audits many SMEs need without realising, and the preparation that reliably cuts the bill. Start with whether you even need one via does your company need an audit.
Published: July 2026
The starting point is that most small proprietary companies do not. The mandatory net catches large proprietary companies, those meeting at least two of three thresholds: $50 million or more in consolidated revenue, $25 million or more in consolidated gross assets, or 100 or more employees, along with public companies, most foreign-controlled companies without relief, AFS licensees, and entities whose constitutions, shareholders agreements, funding covenants or grant conditions demand one. Charities add the ACNC tiers: reviewed statements from $500,000 of revenue, audited from $3 million. And a meaningful share of SME audits are voluntary in law but compulsory in practice, required by a bank, an investor, a franchisor or an approaching sale.
Knowing which trigger applies matters for the fee, because it sets the standard of work: a full reasonable-assurance audit costs materially more than a review engagement, the limited-assurance alternative that satisfies some obligations at roughly half to two-thirds of the price, and buyers of assurance should always confirm which product their obligation actually requires.
Market rates in 2026 cluster in bands set by size and complexity.
Small proprietary companies audited voluntarily or under a specific trigger, single entity, turnover to roughly mid seven figures, clean books: commonly $10,000 to $20,000. The floor keeps rising with auditing standards; genuine sub-$10,000 statutory audits now describe very small, very clean entities.
Mid-sized companies and small groups, multi-entity with consolidation: $20,000 to $50,000, the range widening with entity count, inventory, foreign currency and revenue complexity.
Large proprietary companies at the mandatory thresholds and complex groups: $50,000 to well past $100,000, priced on group structure, systems reliance and risk.
Specialist and compliance audits run their own scales: trust account audits for law practices, real estate agents and conveyancers commonly $2,500 to $8,000 per trust; AFSL audits typically $8,000 to $25,000 depending on licence conditions; grant acquittal and project audits often $3,000 to $10,000 per program; SMSF audits sit lower again in their own market. Not-for-profits with ACNC review obligations typically pay $5,000 to $15,000 for a review and more for a full audit.
First-year engagements carry a premium of commonly 10 to 25 per cent, the auditor builds understanding of the business, systems and opening balances once, and it is priced into year one.
Two similar single-entity companies seek voluntary audits for a bank facility.
Company A closes monthly, reconciles every balance sheet account, and hands over a complete request list two weeks early. Quoted fee: $14,000.
Company B has unreconciled intercompany balances, no fixed asset register, and payroll reports that do not match the ledger. Quoted fee: $22,000, with a clear warning that fieldwork overruns will be billed. The $8,000 gap is not auditor greed; it is billable reconstruction. Investing in year-round outsourced finance discipline often costs less than the permanent audit premium on messy books.
Auditors price hours against risk, and five factors move both.
The state of the books. The single largest variable. Reconciled balance sheets, supported schedules for every material account, a clean fixed asset register, documented revenue recognition and tidy payroll records let the audit test rather than reconstruct. Every unreconciled account is a finding, a query cycle and hours on the clock; audit fees are, to a first approximation, a tax on bookkeeping quality. See the cost of bookkeeping in Australia.
Structure. Each additional entity adds statements, intercompany reconciliations and consolidation work. A four-entity group is not four times the fee of one entity, but it is nowhere near one times either, and undocumented intercompany loans are among the most reliable fee inflators in SME audits. Multi-entity bookkeeping is the year-round fix.
The hard areas. Inventory (attendance at stocktakes, valuation testing), construction-style revenue and WIP, foreign operations, financial instruments, impairment questions and related-party transactions each add specialist hours. A services company and a manufacturer of the same turnover can sit $15,000 apart on these alone.
Systems and evidence. Businesses whose transactions trace cleanly from source to ledger, digital records, approval trails, bank feeds reconciled weekly, audit faster than businesses where evidence lives in inboxes.
Timing and cooperation. Audits crammed against a deadline, with slow responses to queries, cost more, and repeat overruns migrate into next year’s quote. Auditors price clients partly on how last year felt.
The preparation playbook is unglamorous and reliably worth five figures on mid-sized engagements. Close the year properly before the auditors arrive: every balance sheet account reconciled with a supporting schedule, the audit file assembled against the auditor’s request list in advance, prior-year adjustments already booked, and one owner inside the business (or its embedded finance team) fielding queries same-day. Agree the timetable early and hit the dates, ask for the request list before year end so evidence is captured as it happens, and resolve known judgement areas, impairment triggers, revenue cut-off, related-party terms, with a position paper rather than a shrug, because auditors charge for uncertainty in hours.
Then buy properly: quote two or three firms on a like-for-like scope, match the firm to the need, a second-tier or quality boutique firm audits most SMEs to the same standards as the majors at materially lower rates, and confirm whether a review engagement satisfies the obligation before commissioning a full audit. And treat the fee as partly self-set: a business that invests in year-round bookkeeping discipline buys its audit at the clean-books price every year, which is usually the cheapest audit strategy available and the one an embedded finance team delivers as a by-product of doing everything else properly.
If the Corporations Act, licence, constitution or funding deed requires a full audit, buy a full audit. If the obligation accepts a review, compare review fees at half to two-thirds of audit cost against the stakeholder’s real need. If the only driver is a bank “preference,” ask the bank whether a review or agreed-upon procedures will clear the facility condition before paying for reasonable assurance you do not need. If the driver is a sale in 12 to 18 months, a voluntary audit can still be cheap relative to diligence friction; pair it with finance due diligence readiness.
A trading company alone might audit for $18,000. Add a dormant IP company, a property company and undocumented loans between them, and the same auditor quotes $32,000 for group accounts and consolidations. Cleaning intercompany agreements and reconciliations before tender often saves more than negotiating 5 per cent off the fee.
How much does a company audit cost for a small business?
For a single, clean small proprietary company, commonly $10,000 to $20,000, rising through $20,000 to $50,000 for mid-sized companies and small groups, and past $100,000 for large or complex groups. The state of the books moves any of these bands by thousands in either direction.
Which companies are required to be audited?
Large proprietary companies meeting two of three thresholds ($50 million revenue, $25 million assets, 100 employees), public companies, most foreign-controlled companies without relief, AFS licensees, and entities bound by constitutions, shareholder agreements, covenants or grant terms. Charities are reviewed from $500,000 of revenue and audited from $3 million under ACNC tiers. Our companion guide covers the triggers in detail.
What is the difference between an audit and a review?
An audit provides reasonable assurance with full testing; a review provides limited assurance through inquiry and analytical procedures at roughly half to two-thirds of the cost. Some obligations accept a review, so confirm the required standard before buying the more expensive product.
Why was our first audit more expensive?
First-year engagements carry a setup premium, commonly 10 to 25 per cent, for understanding the business, documenting systems and verifying opening balances. It is normal, and it is one reason changing auditors annually is a false economy.
What makes audit fees blow out?
Unreconciled accounts, missing schedules, undocumented intercompany balances, slow query responses and compressed timetables, each converting directly into audit hours. The blowouts are almost always in the books, not the audit.
Do trust account and AFSL audits cost the same as company audits?
No, they are separate, scoped engagements: trust account audits commonly $2,500 to $8,000, AFSL audits typically $8,000 to $25,000 depending on licence conditions, each with fixed statutory deadlines that belong on the compliance calendar.
How do we get a lower quote legitimately?
Reconcile everything before fieldwork, assemble the file against the request list, respond to queries same-day, agree the timetable early, and tender the engagement to two or three appropriately sized firms on identical scope. Clean books plus competitive tension is the whole playbook.
Is a voluntary audit ever worth it?
Frequently: ahead of a sale or raise, where a bank or major customer wants assurance, or where owners not involved in management want independent comfort. Priced against the credibility it buys in those settings, a mid-five-figure audit is often cheap.
Will changing auditors every year save money?
Usually not. First-year premiums and lost institutional knowledge often exceed any fee cut, and quality can slip during transitions. Tender periodically, not annually by default.
Does better bookkeeping really reduce audit fees?
Yes. Auditors price hours; clean, documented books reduce hours. Many SMEs recover a material share of their monthly finance cost in lower audit and due diligence friction over a cycle.
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We review and check this guide periodically. At the time of writing (July 2026), all information was current. Scale Suite is a registered BAS Agent, not a licensed tax advisor or financial advisor. This content is general information only and does not constitute professional tax, financial, or legal advice. Some details may change over time.
Scale Suite is a Sydney-based provider of outsourced finance and HR services for Australian SMEs. We deliver bookkeeping, financial reporting, payroll processing, fractional CFO support, recruitment, employee onboarding, people and culture support, and fractional HR oversight, all as a fully embedded team that works inside your business.
Employment Hero Gold Partner, CA-qualified, and Xero Certified, we replace fragmented finance and HR processes with one responsive, senior-level function at a fraction of the cost of full-time hires. We serve growing businesses across Sydney, Melbourne, Brisbane, and Perth, with packages starting from $1,500 per month and no lock-in contracts.
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