Legal Due Diligence When Buying a Small Business in Australia: What You Actually Need to Check

Legal due diligence when buying a small business in Australia is the process of reviewing every legal obligation, contract, and liability the business carries before you commit to buying it. It covers commercial contracts, property leases, employment agreements, intellectual property, licences, permits, and any existing debt or personal guarantees. Done properly, it takes two to four weeks and typically costs $3,000–$8,000 in solicitor fees. Skip it, and you can inherit problems that cost far more.

Most buyers obsess over the financials and forget the legal side until a week before settlement. That's the wrong order. The legal structure of the deal — what you're actually buying, what obligations transfer to you, and what the seller is walking away from — can reshape the whole negotiation.

This is covered in depth in Module 5 of the Playbook, but here's a practical walkthrough of what legal due diligence involves and why each piece matters.

What Legal Due Diligence Actually Covers

The legal review of a business purchase isn't just "get your solicitor to read the contract." It's a structured investigation across six or seven distinct areas, each of which can surface deal-killers if the business has been running for more than a few years.

A good solicitor will work through: business structure and ownership, commercial contracts, property and leases, employment obligations, intellectual property, licences and permits, and existing liabilities. The depth of each area scales with the complexity of the business — a landscaping company with three residential contracts is different to a commercial cleaning business with forty site agreements.

Rule of thumb: the older the business and the more customers it has, the more legal surface area you're buying.

Business Contracts and Supplier Agreements

Every contract the business has signed is a potential obligation you're inheriting. In an asset sale (which is how most small business purchases are structured in Australia), contracts don't automatically transfer to you — they need to be novated, which means the other party has to agree to replace the seller with you as the contracting party.

This matters enormously for businesses where contracts are the product. A commercial cleaning company with a $400,000 council contract is worth very little if the council can terminate on change of ownership. A pest control business with recurring residential accounts might have nothing in writing at all (which is a different kind of problem).

What to check for every material contract:

Does it have a change-of-control clause that allows the counterparty to terminate?
What's the remaining term, and can it be renewed?
Are there exclusivity provisions that limit what you can do?
Are there performance obligations that the seller hasn't met?

I've seen a deal where a buyer got three weeks from settlement before discovering that their largest customer — a property management group worth 30% of revenue — had a clause allowing them to exit with 30 days notice on any change of ownership. The seller knew. The broker didn't mention it (or so he claimed). The buyer's solicitor caught it. Just.

For a deeper look at how supplier and customer contracts affect your risk profile, see our guide on customer concentration risk.

Licences, Permits, and Registrations

In trades and blue-collar businesses, licences aren't administrative paperwork — they're often the entire business. An electrical contracting business in New South Wales is worthless without a licensed electrical contractor. A plumbing business in Victoria requires a licensed plumber in charge. If the licence is held personally by the seller and can't transfer, you need to either hold the licence yourself or employ someone who does before settlement.

Beyond trade licences, check:

Business registration (ABN, ACN, business name)
Industry-specific licences (builder's licence, contractor licence, trade registration)
Council permits and development approvals relevant to the business
Environmental licences or waste management approvals
Vehicle or equipment certifications (relevant for heavy equipment businesses)
Any licences that have conditions or are under review

The ATO and ASIC registers are publicly searchable. QBCC in Queensland, NSW Fair Trading, and Consumer Affairs Victoria all have online licence registers. Your solicitor should search all of these as a standard step.

Rule of thumb: if the business can't operate without a specific licence, confirm in writing that it will transfer — or that you already hold it — before you sign an LOI.

Employment Contracts and Staff Obligations

When you buy a business's assets (not its shares), the employees don't automatically transfer. You have to offer them employment — and under the Fair Work Act, in most circumstances you must offer it on terms that are no less favourable than their existing conditions.

What this means practically:

You inherit their accumulated leave entitlements (annual leave and long service leave)
If you don't formally offer them employment, redundancy entitlements may apply
Any enterprise agreements or AWAs binding the business follow the employees, not just the business

The seller is usually required to pay out employee entitlements at settlement, but you need to confirm this in the contract of sale. I've seen deals where the seller claimed all entitlements were current and the buyer discovered — post-settlement — that three employees had accrued long service leave worth $40,000 that nobody had modelled.

Ask for a full schedule of employees with their start dates, employment type, applicable award or agreement, annual leave balance, and long service leave balance. Then check the figures against the payroll system yourself. See our guide to retaining staff after buying a small business for what comes after.

Intellectual Property and Goodwill

In a service business, the brand, trading name, and customer relationships are often the most valuable thing you're buying. These live in intellectual property and goodwill — and both need to be explicitly documented in the sale agreement.

Check:

Business name and domain: Is the trading name registered? Does the seller own the domain? Are there trademark registrations, and will they be assigned to you?
Customer databases: Who owns the customer list? Is it stored in systems the seller controls personally?
Website and content: Does the seller own the website outright, or is it built on a third-party platform with licences that don't transfer?
Software and tools: Any proprietary systems, job management software licences, or custom-built tools — who owns them and what happens at settlement?

Goodwill is what you're paying above the value of the tangible assets. It's the business's reputation, its recurring customer relationships, and the seller's knowledge. The restraint of trade clause in your sale agreement is what protects the goodwill you're buying — which brings us to the next section.

Restraint of Trade Clauses

This is the most overlooked part of legal due diligence, and one of the most important. When you buy a business, you're paying for the seller's customer relationships and reputation. The restraint clause is what stops them from starting a competing business next door the following week.

In Australian courts, restraint of trade provisions are enforceable only to the extent they're reasonable — in geographic scope, duration, and the activities they restrict. Courts have struck down overly broad clauses and left buyers with no protection at all.

What a reasonable restraint looks like for a trade business:

Duration: 2–3 years (5 years is harder to enforce)
Geography: the area the business actually operates in
Activities: specifically the type of work and customer relationships being sold

Make sure the restraint is included in the main contract of sale and covers the individual seller (not just the company they trade through). A seller who operates through a company can otherwise wind up the company and start fresh personally.

Property Leases and Premises Obligations

If the business operates from leased premises, the lease is one of the most significant legal assets (and liabilities) you're taking on. Commercial leases in Australia can have substantial make-good obligations, personal guarantee requirements, and assignment restrictions.

Key questions:

How long is the remaining term, and are there options to renew?
Does the landlord need to consent to a lease assignment? (Most leases require this.)
What are the make-good obligations if you eventually vacate?
Is the seller a guarantor on the lease, and will they require you to replace that guarantee?
Are there any rent reviews due, and how are they calculated?

Some landlords — particularly institutional ones — use a change of tenant as an opportunity to reset the lease to market rates. A lease that's been under-market for five years can suddenly look very different when you're the one asking the landlord to consent to the transfer.

Existing Debt and Encumbrances

Before settlement, you need to check the Personal Property Securities Register (PPSR) to identify any security interests registered against the business's assets. These can include equipment finance, chattel mortgages, or security interests held by suppliers.

If you're buying assets, these encumbrances should be discharged by the seller before or at settlement. If they're not discharged, they can follow the asset — meaning you buy the equipment and the debt attached to it.

Also check:

Any ATO debt or payment plans (a tax clearance certificate is standard)
Outstanding court judgments against the business
Any ASIC-registered charges over company assets (if it's a share sale)

For verifying the financials, we cover how to cross-check what the ATO holds against what the seller has disclosed. For a comprehensive picture of what to look for across both legal and financial due diligence, grab our free resource:

Want the full checklist? Our Due Diligence Checklist covers every area of legal and financial due diligence for Australian small business buyers — including PPSR searches, employment schedules, licence verification, and contract review.

Do You Actually Need a Solicitor?

Yes. Full stop. (This might be the least interesting thing I write, but it needs saying.)

Legal due diligence is not DIY territory. A competent commercial solicitor in Australia charges $350–$600 per hour and will spend 8–15 hours on a standard small business purchase. That's $3,000–$9,000 for a deal that might be $400,000. The maths is obvious.

What's less obvious is that a good solicitor catches things that aren't on any checklist — the clause buried in an old supplier agreement, the employment obligation that was misclassified, the lease that the landlord can argue wasn't properly assigned. These are the things that either kill the deal or kill the profit.

Use a solicitor who specialises in business sales, not your cousin who does conveyancing. The two are genuinely different skill sets.

How Legal DD Connects to the Broader Due Diligence Process

Legal due diligence is one stream of the broader DD process, which also includes financial and operational reviews. All three should run in parallel, not sequentially — discoveries in one area often trigger questions in another.

For a full picture of due diligence when buying a business, we've covered the financial side separately. The settlement process is where everything you've found gets translated into final contract conditions and adjustments.

FAQ

What does legal due diligence involve when buying a business?

Legal due diligence reviews all contracts, leases, employment agreements, licences, permits, intellectual property, and existing liabilities before you commit to buying. It confirms what obligations transfer to you and identifies anything that could reduce the business's value or create unexpected liability.

Do I need a solicitor to buy a small business in Australia?

Yes. A commercial solicitor experienced in business sales is essential. Expect to spend $3,000–$9,000 in solicitor fees on a typical small business purchase. This is not an area to cut corners — errors discovered post-settlement are expensive.

How long does legal due diligence take?

Two to four weeks for a straightforward small business purchase, assuming the seller provides documents promptly. More complex businesses or those with multiple leases, many contracts, or employment issues can take six to eight weeks.

What licences need to be checked when buying a trades business?

Check trade licences (e.g. contractor licence, builder's licence, electrical or plumbing registration), business name and ABN registrations, council or local authority permits, and any industry-specific certifications. In many trades, the licence is personal to the holder and cannot be transferred.

What is the PPSR and why does it matter?

The Personal Property Securities Register records security interests against business assets — equipment finance, chattel mortgages, and supplier retention-of-title clauses. Searching the PPSR before settlement confirms which assets are unencumbered and ensures any charges are discharged before the business transfers to you.

If you found this useful, The Leveraged Worker newsletter covers the full acquisition journey — deals, mistakes, and what's actually working — for Australian professionals buying blue-collar businesses. Subscribe at thatdeal.com.au.