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Australia | Due Diligence

Due Diligence Checklist for Australian Business Sellers

Prepare reliable evidence, control sensitive disclosure, and resolve inconsistencies before they become buyer findings. A complete checklist improves discipline but does not guarantee a sale.

By Joel Surges, Managing Partner · Published 2026-07-14 · Reviewed 2026-07-14

Scope: This guide provides general business information, not legal, tax, accounting, valuation, employment, privacy, cybersecurity, financial, or investment advice. Requirements depend on the business, buyer, structure, and Commonwealth, state, territory, and local rules.

Set up the process before collecting documents

Business.gov.au asks sellers to identify what is being sold, organise business information, value the business, address employees, complete tax and legal work, and transfer registrations and obligations. Turn those workstreams into a controlled seller-side diligence process.

  • appoint a diligence owner and adviser contacts
  • define the likely transaction perimeter and legal entities
  • create a request tracker with owner, source, review status, and disclosure stage
  • create an issue register for known gaps, advice, remediation, and proposed disclosure
  • separate original records from working copies and explanations
  • record who receives access, when, and for what purpose

Stage personal and commercially sensitive information

OAIC guidance on APP 6 says an APP entity generally uses or discloses personal information for the primary purpose of collection unless an exception applies. A confidentiality agreement does not, by itself, establish that every customer or employee disclosure is appropriate.

  1. Initial fit: aggregated and non-identifying information.
  2. Qualified buyer: controlled information after identity, funding, conflicts, and confidentiality are assessed.
  3. Preferred buyer: deeper diligence with role-based access, redaction, and access logs.
  4. Pre-completion: information needed for consents, employee steps, completion, and handover under adviser-approved controls.

Restrict sensitive folders, remove unnecessary identifiers, watermark exports where appropriate, and withdraw access when a party leaves the process.

Corporate, ownership, financial, and tax records

AreaEvidence to organise
Corporateentity details, shareholdings, constitution, shareholder agreements, options, directors, governance, related parties, and business names
Financialfinancial statements, management accounts, bank and debt records, receivables, payables, inventory, working capital, assets, budgets, and forecasts
Taxincome tax, GST, payroll and other filings, registrations, correspondence, audits, disputes, and support for adjustments
Transactionshare or asset perimeter, excluded items, cash, debt, working capital, price adjustments, consents, and completion steps

ASIC explains that shares are ownership interests in a company and shareholders do not own the company's assets. That distinction affects the diligence perimeter. Tax outcomes depend on the seller, entity, assets, structure, allocation, GST status, concessions, and current law. Obtain Australian tax and legal advice before agreeing structure or allocation.

Commercial, contracts, suppliers, and operations

  • material customer contracts, renewals, termination, assignment, change-of-control, consent, and concentration
  • revenue and margin by customer, product, service, location, and channel
  • pipeline, backlog, tenders, pricing, rebates, warranties, complaints, and credits
  • supplier, agency, distribution, exclusivity, and subcontractor agreements
  • single-source dependencies, lead times, minimum orders, and supply continuity
  • procedures, quality systems, capacity, maintenance, continuity, and incident plans

Correct errors rather than allowing inconsistent explanations to accumulate. Record known issues with their evidence, impact, advice, action, owner, and disclosure stage.

Employees, safety, property, technology, and regulation

  • People: organisation chart, awards, enterprise agreements, contracts, remuneration, leave, claims, contractors, licences, and owner dependencies
  • Safety: governance, risks, consultation, incidents, investigations, training, notices, and corrective actions
  • Property and assets: titles, leases, assignments, guarantees, condition, ownership, finance, maintenance, and replacement plans
  • Technology and privacy: systems, licences, access, backups, cybersecurity incidents, personal-information purposes, processors, and retention
  • Intellectual property: trade marks, designs, domains, copyright, know-how, assignments, licences, and disputes
  • Regulation: Commonwealth, state, territory, and local licences, permits, registrations, audits, responsible people, and transfer requirements

Australian licensing and employment obligations are not uniform across every jurisdiction or industry. Map the issuing authority, holder, scope, conditions, expiry, ownership-change rules, and required action for each approval.

Maintain an issue register and disclosure trail

A buyer may ask follow-up questions even when the seller file is complete. The objective is accurate, consistent, controlled evidence.

FieldPurpose
Issue and evidenceState the fact and link the source documents and affected period.
ImpactRecord financial, operational, legal, employee, privacy, regulatory, or timing implications for advice.
ActionCorrect, reconcile, obtain advice, disclose, or monitor.
Owner and stageAssign responsibility and control when, how, and to whom the issue is disclosed.

Use this checklist with the Australian preparation guide, sale-process guide, and employee guide.

Official Australian resources

Frequently asked questions

What should an Australian seller prepare for due diligence?

Prepare reliable corporate, financial, tax, commercial, employee, safety, property, technology, privacy, intellectual-property, insurance, and regulatory evidence for the actual transaction perimeter.

Should every buyer receive the same information?

No. Stage disclosure according to buyer credibility and process need. Minimise personal and commercially sensitive information and use appropriate confidentiality, privacy, security, and access controls.

Does a complete checklist prevent further buyer requests?

No. Diligence scope depends on the buyer, business, structure, findings, and advisers. A good checklist improves accuracy and response discipline.

Should known issues be fixed before a sale?

Correct what can be corrected responsibly. Preserve the original evidence, obtain advice, and disclose material issues accurately rather than hiding or retrospectively rewriting records.

Preparing for buyer diligence?

PermaTech can explain the information it normally reviews for an established Australian industrial or commercial business. Your advisers should approve the disclosure process and transaction-specific responses.

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