Due Diligence (DD) In Business: Essential Guide For Buyers And Sellers

If you’re buying or selling a business in Australia - or investing in one - you’ll almost certainly hear people say “do your DD”. DD stands for due diligence, and it’s the structured review you do so there are no surprises after the deal is done.

In this guide, we unpack what due diligence really means in business, how to run it step by step, the key legal issues to check in Australia, and the documents you’ll use along the way. Whether you’re a first-time buyer or preparing your company for sale, this walkthrough will help you move forward with clarity and confidence.

What Does Due Diligence (DD) Mean - And Why It Matters?

Due diligence is the process of investigating a business before you commit to a purchase, sale or investment. Think of it as doing your homework on the business’ finances, contracts, staff, intellectual property, operations and legal risks.

For buyers, DD verifies the story behind the numbers and helps you price and structure the deal. For sellers, doing your own DD before going to market helps you prepare clean records, fix issues early and build trust with serious buyers.

Importantly, due diligence isn’t just about finding problems - it’s also about confirming what’s working well, spotting opportunities and negotiating sensible protections in your contract. The goal is informed decision-making and smart risk management.

How To Run Due Diligence Step By Step

1) Define your scope

Every deal is different. Start by agreeing the scope of what will be reviewed. Common DD workstreams include:

• Financials: historical revenue and margins, cashflow, tax lodgements and liabilities.
• Legal: key contracts, licences, disputes, leases and corporate records.
• Operational: customers, suppliers, inventory, systems, KPIs and processes.
• People: org chart, employment terms, award coverage, leave accruals and payroll.
• Intellectual property: brand ownership, trade marks, copyrights and know‑how.
• Regulatory and privacy: permits, sector compliance and data handling.
• Assets and security: plant, equipment, vehicles and any registered security interests.

Using a structured checklist keeps everyone aligned. Many clients use a tailored list as part of a Legal Due Diligence Package so nothing critical is missed.

2) Collect information and documents

Buyers typically request (and sellers prepare) a data room with core documents such as:

• Financial statements and tax returns (usually for the last three years).
• Material customer and supplier contracts, and terms of trade.
• Property documents: leases, subleases, options and any outgoings.
• Corporate records: constitution, cap table, ASIC extracts, minutes and resolutions.
• Employment records, including each Employment Contract and applicable policies.
• IP assets and registrations (for example, trade marks and licences).
• Insurance policies and any claims history.
• Details of loans, encumbrances and PPSR registrations.

Confidential information is usually shared under a Non-Disclosure Agreement to protect both sides while the review is underway.

3) Review, analyse and test

Once the data room is open, the work shifts to analysis. Key questions include:

• Do the revenue, margins and cashflows reconcile with bank statements and BAS?
• Are there any unpaid taxes or ATO payment plans?
• Are material contracts assignable on an asset sale, or change‑of‑control compliant on a share sale?
• Are licences, industry accreditations and council approvals current?
• Are staff correctly engaged and paid under the right awards and classifications?
• Is the brand properly protected (e.g. a registered trade mark) and owned by the seller?
• Are there undisclosed disputes, defects, product recalls or regulatory investigations?

If you’re not sure how to interpret something, it’s wise to engage an accountant and a business sale lawyer early - a trained eye can save days of back‑and‑forth and help you focus on what truly matters.

4) Ask questions and seek clarifications

DD is collaborative. Expect to raise follow‑ups to explain unusual movements, confirm one‑off items or request missing files. It’s normal to schedule Q&A sessions so you can move quickly and keep a clear audit trail.

5) Resolve issues and negotiate protections

Findings often lead to fixes (e.g. obtaining a missing licence), price adjustments, or tailored protections in the sale contract (for example, warranties, indemnities, retention amounts or earn‑outs). We cover common legal protections below.

6) Decide: proceed, renegotiate or walk away

After you’ve reviewed the material and resolved key uncertainties, you’ll decide whether to proceed, renegotiate key terms or withdraw. Due diligence gives you the confidence to make that call with eyes wide open.

Legal Obligations And Risks To Consider In Australia

Here are the headline legal issues we see most often in Australian business sales and acquisitions.

Australian Consumer Law (ACL) and disclosure

The ACL prohibits misleading or deceptive conduct and false or misleading representations in trade or commerce. That means information provided about the business needs to be accurate and not misleading overall.

There isn’t a general “duty to disclose everything” under the ACL in a typical private business sale. However, if you choose to make statements, they must not be misleading, and certain sectors (like franchising) have specific disclosure requirements. A thorough DD process helps both parties stay on the right side of these obligations.

Sale structure: asset sale vs share sale

• Asset sale: The buyer purchases selected assets (and often assumes selected liabilities) from the seller. Contracts usually need assignment. Staff don’t automatically transfer; the buyer decides whether to offer new employment. Redundancy obligations can arise for the seller if staff aren’t offered comparable roles. Superannuation is not “transferred” - it’s paid by each employer on ordinary time earnings going forward.
• Share sale: The buyer acquires the company’s shares. The employing entity remains the same, so employees generally continue without a break in service. Contracts that include change‑of‑control clauses may still need consent.

Your Business Sale Agreement (for a share deal) or Asset Sale Agreement (for an asset deal) should reflect these differences clearly.

Employees and Fair Work compliance

Check award coverage, classifications, minimum rates, overtime and allowances. Confirm accrued leave balances and service dates. In transfer‑of‑business scenarios under the Fair Work Act, some entitlements (like service recognition) may carry over if certain conditions are met. Handle communications sensitively and document any offers of employment.

Intellectual property (IP) and brand protection

Verify ownership of all IP that the business relies on - brand names, logos, domain names, software, content and know‑how. Where essential, confirm registrations and chain of title, and ensure any assignment documents are ready for completion. If the brand is a key asset, it’s prudent to register your trade mark (or confirm it is validly registered in the seller’s name and will transfer).

Contracts, leases and consents

Material customer and supplier contracts should be reviewed for term, pricing, termination, exclusivity and assignment/change‑of‑control provisions. For premises, review the lease, options, rent review mechanisms and make‑good. Be clear about who is responsible for obtaining landlord and third‑party consents before completion.

Security interests and the PPSR

Identify any security interests over assets or receivables and ensure they’re released at completion. It’s common to search the Personal Property Securities Register. If you’re a seller offering vendor finance or deferred payments, a properly drafted security and a PPSR registration can protect your position - start by understanding what the PPSR is and how it operates in practice.

Regulatory approvals and privacy

Some industries require special licences or accreditations (for example, health, financial services, liquor, childcare or NDIS). Confirm the status of all permits and whether they can be transferred or need to be re‑applied for.

If the business collects personal information, check privacy compliance and whether the business has a current Privacy Policy that reflects actual practices.

Tax, working capital and adjustments

Tax settings, GST treatment, stock valuation and completion adjustments can materially affect the price you actually pay or receive. It’s important to involve an accountant early for tax and financial modelling so your legal terms align with the numbers.

What Documents Will You Use During Due Diligence?

The paperwork you prepare and review will vary by deal, but the following are commonly used in Australian business sales.

• Non‑Disclosure Agreement (NDA): Protects confidential information shared during DD. This should bind the buyer and their advisers.
• Due Diligence Checklist: A structured list of the information and documents to review, often included as part of a Legal Due Diligence Package.
• Business Sale Agreement: Used when buying or selling shares in the company. Sets out price, conditions, warranties, indemnities and completion steps.
• Asset Sale Agreement: Used when buying or selling specific assets and contracts. Covers asset lists, assumed liabilities, assignments and consents.
• Employment Contracts and Policies: Ensure compliant terms, correct classifications and clarity on any transfer-of-business arrangements.
• IP Assignments and Trade Mark Certificates: Evidence of ownership and documents that transfer the brand and other IP at completion.
• Leases and Landlord Consents: If premises are mission‑critical, landlord consent is often a condition precedent to completion.
• Security Documents and PPSR Releases: To release existing encumbrances and, where relevant, to secure any deferred consideration.
• Shareholders Agreement: If you’ll co‑own the company post‑completion, a Shareholders Agreement clarifies decision‑making, exits and investor rights.

Getting these documents tailored to your deal and sector helps avoid gaps and costly fixes later.

Buying A Business Vs Starting From Scratch: Which Is Easier?

Buying an existing business can fast‑track you into revenue, systems and a customer base. You can also inherit legacy risks like outdated contracts, non‑compliant practices or unprotected IP.

Starting from scratch gives you clean foundations and full control, but you’ll need to build everything - brand, operations and customers - from day one. Due diligence is still relevant here: you’re doing it on your own plan, suppliers and assumptions.

There’s no one right answer. If DD shows strong fundamentals and manageable risks, buying can be a great pathway. If red flags stack up, starting fresh with the right legal building blocks - from your brand protection to solid Employment Contracts and a clear Privacy Policy - may be the smarter call.

Key Takeaways

• Due diligence (DD) is a structured review of a business’ financial, legal, operational and IP position so you can make informed decisions and negotiate sensible protections.
• The ACL prohibits misleading or deceptive conduct, but there isn’t a blanket duty to disclose everything in a private sale; sector‑specific regimes (like franchising) can impose extra disclosure rules.
• Sale structure matters: in an asset sale, staff don’t automatically transfer and redundancy may arise; in a share sale, the employing entity stays the same and service usually continues.
• Focus on contracts, leases and consents, brand ownership and trade marks, Fair Work compliance, security interests on the PPSR, and any industry licences or privacy obligations.
• Core documents include an NDA, DD checklist, the correct sale agreement type, employment and IP documents, lease consents and PPSR releases - tailored drafting is key.
• Engage a business sale lawyer for legal risk, and an accountant for tax and completion adjustments, so your contract and price align with reality.

If you’d like a consultation on doing due diligence for a business purchase or sale, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.