What a company structure does not protect: guarantees, personal duties and the obligations nobody lists

Ask a business owner why they set up a company, and the answers come quickly: to separate the business from personal assets, for tax reasons, because the accountant recommended it, because a new venture needed its own entity. Ask a narrower question, which risks does this structure actually keep away from me, and which does it leave exactly where they were?, and the answers slow down. Someone offers to check with the accountant.

That pause matters. A company structure is often set up once, on advice that was correct for the business at the time, and then left alone while the business changes. Meanwhile, the owner signs leases, loans, supplier accounts and contracts, many of them with personal guarantees. Some duties attach to directors personally whatever the structure says. Over a decade, the protection the structure was meant to provide can be quietly traded away, one reasonable signature at a time.

This article explains what limited liability does and does not do, the main ways exposure reaches owners and directors personally, why structure and insurance do different jobs, and how a small business can keep a simple register of the obligations it has signed. It is general information only and does not describe the law for any particular situation. Your accountant and lawyer should review your structure and obligations, and ASIC and the ATO publish guidance for company directors.

Limited liability allocates, it does not erase

When something goes wrong, the cost lands somewhere: on the company, on a related company, on directors personally, on an insurer, on a supplier who accepted a risk under contract, or, if none of those can pay, on the person who was harmed. A company structure determines the order in which those parties are reached and how far the reach extends. That is valuable. It is not the same thing as protection.

Three common assumptions cause most of the trouble:

The company is a wall. It is better thought of as a starting point. Obligations you take on personally, duties that attach to you as a director and laws aimed specifically at individuals all sit outside it.
Structure and insurance do the same job. Structure decides who is liable; insurance decides who funds the payment. A business can be well structured and completely unfunded for a serious claim.
It was set up by professionals, so it is still right. Advice is accurate at its date, on the facts given, for the question asked. Nothing that has happened since updates it.

The guarantees nobody adds up

Over the years a growing business signs a great deal: a lease with a personal guarantee from the director, an overdraft secured on the family home, equipment finance, supplier trade accounts with a guarantee in the application form, performance security on customer contracts, indemnities buried in service agreements. Each was a sensible trade at the time, often the only way to get the deal. Each moves some exposure back across the line the company was meant to draw.

The structure chart shows the business as designed. A list of every live guarantee shows it as it actually operates. Where the two differ, the second is the accurate picture.

Two kinds of guarantee are especially easy to forget:

Trade account guarantees signed on a credit application years ago, often unlimited and with no end date.
Guarantees for something you no longer own, such as a lease for premises you moved out of or a business you sold, where nobody obtained a release.

The remedy is simple and cheap: an obligations register kept alongside the company records.

Field	What to record
Instrument	Guarantee, indemnity, security, letter of comfort
Given by	The company, a related company or a person
In favour of	The landlord, bank, supplier or customer
Covers	What obligations, and for which entity
Limit	Capped amount, or unlimited
Trigger	What would cause it to be called
Expiry	End date, or none
Release	Whether a release has been sought or obtained

Duties that attach to people

A second group of exposures sits outside the structure by design. Laws aimed only at companies could be defeated by letting the company fail, so some obligations attach to individuals as well. In Australia, general examples include:

Directors’ duties under company law, such as acting with care and diligence and in good faith, and the duty not to let the company incur debts when it is insolvent or would become insolvent by incurring them. ASIC publishes guidance for directors.
Tax and superannuation. The ATO’s director penalty regime can make directors personally liable for certain unpaid company amounts, such as some withheld tax, GST and superannuation guarantee charge. Lodging and paying on time matters. Your accountant or the ATO can explain how it works.
Work health and safety. Officers of a business, which can include directors, have their own duty to exercise due diligence, and penalties can apply to individuals.
Environmental and other regulatory regimes, some of which can reach individuals involved in a contravention.

The detail varies by law and situation, and needs professional advice. The governance point does not depend on the detail: this kind of exposure is not limited by your shareholding or the company’s assets. It follows conduct, knowledge and the condition of the company at the time. That means it concentrates exactly when pressure is highest: trading through a difficult period, rushing to complete a project, responding to an incident. Agreeing to be a director of a related company “just for the paperwork” is not a purely nominal act. The steering a small business through a downturn article covers getting advice early when a company is under financial pressure.

Structure and insurance fail in opposite directions

Relying on either one alone produces a matching error.

Relying on structure where insurance was needed. The liable company cannot pay. The obligation has not disappeared; it has been pushed onto a customer, an employee, a supplier or the community. Those consequences arrive quickly, and other businesses notice. Suppliers and landlords who see a related business leave debts unpaid adjust their terms with everyone connected to it.

Relying on insurance where structure was needed. The policy turns out to have limits, exclusions, notification conditions and named insureds that no longer match the business. Insurance responds to its wording, not to what everyone assumed.

A thinly capitalised company also sends a signal rather than providing a shield. Experienced landlords, banks and suppliers read the structure and ask for personal guarantees, which is exactly how the guarantee list grows.

Structures drift as the business changes

A structure built for one business can become wrong for the business you now run. Review it when:

you take on significant borrowing;
you buy or sell a business or premises;
you start a materially different activity, such as moving from selling products to providing installation or advice;
you begin operating in another state or country;
you accumulate valuable assets, such as intellectual property, data or equipment;
a new partner, investor or family member becomes involved.

Some dependencies sit outside any structure entirely. Access to customers through a marketplace or platform, for example, is a dependency rather than an asset, and no company structure protects it. The ring-fencing a new venture article covers when separating a new activity genuinely limits exposure and when the separation is only decorative.

Three simple tests

The purpose test. For each company or trust, can you state in one sentence why it exists, what it holds and what it is exposed to? Entities that fail this test carry cost and directorships without benefit.
The signature test. Who can bind the business, or you personally, to a guarantee? Up to what amount? Where is the record?
The clean failure test. Take the entity most likely to fail and walk the consequences through: cross-guarantees, shared bank facilities, shared staff, shared insurance, contracts that name another entity. If it cannot fail without dragging others with it, the separation is nominal.

Small businesses often involve family members as directors, guarantors or trustees, sometimes without much discussion. A spouse may co-sign a guarantee on a bank facility, or a parent may agree to become a director of a new company to meet a formal requirement. Each of these people takes on real obligations. Before anyone signs, make sure they understand what they are agreeing to, and that they have had the chance to get independent advice. Banks often require this for guarantees, and it is good practice in any case.

Related entities create a similar risk. If one company lends money to another, shares staff, pays the other’s bills or allows its bank accounts to be mixed with the other’s, the separation that the structure was meant to provide can become hard to see, both for you and for anyone examining the businesses later. Keep separate accounts, document loans between entities and record which company employs whom and owns what.

A worked example

This is an illustration. The owner of a hospitality business operates a café through one company and a catering business through another. The owner believes the structure protects the family home. Asked by their accountant to list every guarantee they have signed, the owner finds:

a personal guarantee on the café lease, with three years remaining at $60,000 a year: up to about $180,000 of rent;
a personal guarantee on the catering company’s $100,000 overdraft, secured over the family home: up to $100,000;
two supplier trade account applications with personal guarantees, signed years ago, with current balances that could run to about $40,000 and $25,000;
a personal guarantee on the lease of a previous café, sold three years ago with the lease assigned to the buyer, with no record of a release and two years remaining at $48,000 a year: possibly up to $96,000.

Together, the guarantees could expose the owner personally to around $441,000, much of it unrelated to the business the owner is running today. None of it appears on either company’s balance sheet.

The owner and accountant take several steps:

They ask a lawyer whether the owner remains liable on the old café lease and, if so, how to seek a release from the landlord.
They ask the two suppliers to replace the unlimited guarantees with capped ones, or to remove them given the companies’ long payment history.
They set a rule that no new guarantee is signed without being recorded in the register and discussed with the accountant first.
They confirm that business activity statements and superannuation are lodged and paid on time in both companies, and set reminders.
They ask their insurance broker about management liability cover for directors and what it would and would not respond to.

The structure has not changed. What has changed is that the owner now knows what it does and does not protect.

How this applies to a small Australian business

Keep an obligations register of every guarantee, indemnity and security, including old ones.
Seek releases when you sell a business, assign a lease or close an account.
Ask for caps and end dates on guarantees where you can.
Lodge and pay tax and superannuation on time; personal exposure can follow if a company does not.
Understand your duties as a director. ASIC’s guidance is a good starting point.
Check insurance against the structure, including who the named insureds are.
Review the structure when the business changes significantly.
Get professional advice. Your accountant and lawyer can tell you what your structure actually achieves.

Signals worth watching

Nobody can list the guarantees currently in force.
Unlimited guarantees on old trade account forms.
Guarantees for premises or businesses you no longer own.
Late tax or superannuation lodgements in any company.
Directorships held “for convenience” in companies you do not follow closely.
Insurance policies naming entities that no longer exist or missing ones that do.

Common mistakes

Believing the company protects personal assets regardless of what you sign.
Signing guarantees without recording them.
Forgetting to obtain releases when selling or moving.
Treating structure and insurance as interchangeable.
Accepting directorships without following the company’s position.
Never reviewing a structure set up for a different business.

Frequently asked questions

Is a company still worth having? Often, yes. It can provide real separation for many kinds of claim and has other benefits. The point is to know what it does not cover.

Can I avoid giving personal guarantees? Sometimes. A strong trading history, security over business assets or a larger deposit can help. Where you cannot avoid them, ask for a cap and an end date.

What happens to a guarantee when I sell the business? It depends on the documents and the law. Do not assume it ends. Ask your lawyer to seek releases as part of the sale.

What is management liability insurance? A type of policy that can cover certain claims against directors and officers. What it covers varies widely, so read the policy and ask your broker.

Where can I learn about directors’ duties? ASIC publishes plain-language guidance for small business directors, and the ATO explains the director penalty regime on its website.

Questions to ask

What exactly does our company structure protect, and from what?
What guarantees have we signed, personally and through each company?
Which of them relate to businesses or premises we no longer have?
Are our tax and superannuation obligations lodged and paid on time?
Could our riskiest entity fail without affecting the others?
When was our structure last reviewed against the business we run today?

Bringing it together

A company structure decides who is reached first when something goes wrong, not whether anyone is reached. Personal guarantees, directors’ duties and laws aimed at individuals all sit outside it, and insurance is a separate tool with its own limits. Keep a simple register of every guarantee and obligation you have signed, seek releases when circumstances change, ask for caps and end dates, and keep tax and superannuation up to date. Review the structure whenever the business changes significantly, and get professional advice on what it actually achieves. Knowing where you stand costs an afternoon; finding out after a failure can cost much more.

Source: KEVOS notes, drawing on teaching material on corporate structure, guarantees and risk allocation. This article is general information, not legal, tax or financial advice. Examples and figures in this article are illustrations.