Most of what is written about insolvent trading is written for lawyers, by lawyers. You search for what happens to a director when the business goes under and you get a wall of section numbers, cash flow tests and safe harbour clauses explained in the abstract. None of it tells you what any of it means when the specific decision in front of you is whether to take a five thousand dollar deposit on Monday for a system you are not sure you can install.
I have spent twenty years in and around the Australian solar trade, and I have watched good install businesses slide from busy to broke faster than the owner wanted to admit. This is not legal advice, and I will say that again properly at the end. What it is meant to be is a plain-English walk through the same legal tests your accountant and your lawyer will apply, mapped onto the exact calls a solar operator faces when the cash stops flowing. Read this, then get proper advice early. That last part is the whole point.
The two tests that decide whether you are insolvent
Australian company law works off a fairly blunt idea: a company is insolvent when it cannot pay its debts as and when they fall due. That is the cash flow test, and it is the one that matters most in practice. There is a second angle, the balance sheet test, where your liabilities exceed your assets, but courts lean heavily on cash flow because a business can be technically solvent on paper and still unable to make payroll on Friday (Worrells, n.d.).
Here is why that distinction bites for a solar business specifically. Our trade runs on a lag. You buy panels and inverters up front, you pay subbies to get them on the roof, and then you wait: for the customer’s final payment, for the finance drawdown, for the certificates to clear. On paper you might have a fat pipeline and a balance sheet that looks fine. In the bank account, you are one slow week from missing a supplier payment. The cash flow test does not care about your pipeline. It cares about whether the money is there when the bill is due.
What insolvency actually looks like on a solar job sheet
The law talks in generalities. Your business talks in warning signs. Translate one into the other and the picture gets uncomfortable fast.
STC cash is drifting. You self-register the certificates, or you assign them, and the money that used to land in a couple of weeks is now stretching out. Small-scale technology certificates are not a government rebate, whatever the customer calls them. They are tradeable certificates created from a system’s deemed generation, which liable entities buy and surrender to the Clean Energy Regulator under the Renewable Energy Target (Clean Energy Regulator, n.d.). Their price floats with the market, and the timing of the cash depends on your paperwork being clean. When that income starts arriving late, or a batch gets held up on a compliance query, a chunk of your working capital is frozen at exactly the wrong moment. I have written more about why that certificate is not a rebate in why STCs are not a rebate.
A supplier tightens your terms. The wholesaler who used to give you thirty days now wants payment on order, or drops your credit limit. Suppliers see a lot of businesses fail and they are usually reading your slow payments before you have admitted anything to yourself. When credit tightens across your suppliers, that is the market telling you something.
Subbies are chasing. The install crews you owe are ringing about invoices from three weeks ago, and you are quietly deciding whose invoice waits another fortnight. The day you start rationing which trusted subbie gets paid is the day you should be talking to an advisor, not to yourself.
Any one of these on its own is a bad week. Two or three together, sustained over a month or two, is the cash flow test failing in real time.
Section 588G: the point where it becomes your personal problem
This is the part that changes everything. A company debt is normally the company’s problem, not yours. That is the entire reason you set up a Pty Ltd in the first place. Insolvent trading is the crack in that wall.
Under section 588G of the Corporations Act, a director can be held personally liable for debts the company takes on after the point where they knew, or a reasonable person in their position would have suspected, that the company was insolvent (Boss Lawyers, n.d.). Read that carefully. It is not about debts you had before things went bad. It is about the new debts you keep racking up once you should have known better.
For a solar operator, the single most dangerous version of this is taking customer money for work you may not deliver. Every deposit you accept is a debt: the customer has paid, and you owe them a system or their money back. If you keep signing contracts and banking deposits while a reasonable person in your shoes would have suspected the business could not deliver, you are creating exactly the kind of debt that section 588G reaches into your own pocket for. A subbie invoice you take on for a job that is already shaky is the same thing. A stock order placed on a stretched supplier account is the same thing.
The mechanism is what makes it so serious. Insolvent trading claims can pierce the limited liability of the company and expose your personal assets (Worrells, n.d.). The house, the ute, the savings. This is not a fine the company pays. It is you.
Safe harbour: the defence, and what it actually requires of you
Parliament understood that scaring directors into shutting down at the first bad month is not good for anyone, so section 588GA gives a defence known as safe harbour. The idea is that if, after you start suspecting insolvency, you develop one or more courses of action reasonably likely to lead to a better outcome for the company than immediate liquidation, the debts incurred while you pursue that plan can be protected (Boss Lawyers, n.d.).
Here is what people miss. Safe harbour is not a switch you flip. It is a standard of behaviour you have to actually meet, and it comes with conditions. You need to be keeping proper financial records, staying on top of employee entitlements, and keeping your tax lodgements current. And critically, you generally have to be getting appropriate advice from a qualified professional. A better outcome plan scribbled on the back of a quote does not count.
For a small trade business, developing a better outcome does not have to mean a formal restructure with a boardroom full of advisors. It might mean sitting down with an insolvency practitioner and working out whether an orderly wind-down, completing the jobs you can actually finish and refunding the ones you cannot, beats a sudden collapse that leaves deposits stranded and subbies unpaid. It might mean bringing in a restructuring adviser, renegotiating supplier terms, or trimming back to a size the cash flow can carry. What it cannot mean is putting your head down and hoping the next big job saves you. That is the last-minute scramble the law is specifically designed to punish, and it is the opposite of safe harbour.
The window matters more than the strategy. Safe harbour protects debts from the point you start taking reasonable steps. Every week you wait is a week of new debts that get no protection at all.
The solar-specific traps nobody warns you about
Generic insolvency content stops at the general law. The solar trade has its own landmines layered on top.
STCs on a job that then stalls or reverses. If you self-register or assign certificates for a system and the job is later cancelled, uninstalled, or found non-compliant, that certificate exposure does not just evaporate. There is a real process around cancellation and surrender of certificates (Clean Energy Regulator, n.d.), and the value you booked as income can turn into a liability. Register aggressively on shaky jobs while insolvent, and you are stacking a certificate problem on top of an insolvent trading problem.
Deposits for systems that will not be delivered. This is the big one. When a solar business collapses mid-job, the loudest casualties are the customers who paid deposits for installs that never happened. Taking those deposits once you should have known you could not deliver is squarely the conduct section 588G targets, and it is a consumer protection problem on top. If you want the customer side of the deposit picture, I have covered it in solar deposits and consumer rights.
Letting subbie debts pile up while still signing new work. Continuing to take on contracts while you cannot pay the crews already owed is close to a textbook insolvent trading pattern. Good subbie relationships are hard to build and easy to torch, and unpaid crews talk. Managing that relationship well matters even when times are good, which I have written about in solar subcontractor management.
Director Penalty Notices: the tax exposure that compounds it all
Sitting underneath the insolvent trading question is a second, separate personal exposure: Director Penalty Notices. If the company falls behind on PAYG withholding and superannuation, the ATO can issue a DPN that makes the director personally liable for those amounts. Certain unpaid super and unreported obligations can become a personal debt that you cannot escape simply by putting the company into liquidation (Boss Lawyers, n.d.).
The reason this matters so much in a wind-down is that it compounds. The longer a struggling business keeps operating, the more PAYG and super it accrues and fails to remit, and the bigger the personal DPN exposure grows alongside the insolvent trading exposure. Two personal liabilities, both getting worse every month you delay, both pointing at the same set of decisions. Keeping tax lodgements current is also, not coincidentally, one of the conditions of safe harbour.
The one thing to actually do
If you take nothing else from this, take this: the single highest-leverage action available to you is getting a registered insolvency practitioner or an insolvency lawyer involved the moment the warning signs appear, not after the wall has already come down. Every protection in this article, safe harbour especially, rewards early action and punishes delay. The director who rings an advisor when the STC cash first starts drifting has options. The one who rings after bouncing a supplier payment and spending three deposits has almost none.
This is also where visibility earns its keep. Most operators do not miss the warning signs because they are reckless. They miss them because the information is scattered across a quoting tool, a spreadsheet, a shoebox of subbie invoices and a separate STC portal, and nobody has a single view of what is owed and what is owing. CurrentFlow is the tool I am building because I lived that blindness: the idea is to put jobs, deposits, subcontractor payments and pending STC assignments in one real-time view, so a director can see the cash flow squeeze forming while there is still time to act on advice. It will not make the hard decisions for you. It is designed to make sure you see them coming.
Winding down is rarely the failure people imagine. Done early and in an orderly way, it protects your customers, your subbies and your own personal assets. Done late, in a scramble, it does the opposite on every count.
This article is general information only and is not legal, financial or insolvency advice. Insolvency law is complex and the consequences are personal and serious. If any of the warning signs here sound like your business, speak to a registered liquidator, insolvency practitioner or qualified lawyer about your specific situation as soon as you can.
References
Boss Lawyers. (n.d.). Insolvent trading: Complete guide for directors, s 588G liability and safe harbour. Retrieved from https://bosslawyers.com.au/insolvent-trading-complete-guide-for-directors-s-588g-liability-and-safe-harbour/
Clean Energy Regulator. (n.d.). Small-scale technology certificates. Retrieved from https://cer.gov.au/schemes/renewable-energy-target/small-scale-renewable-energy-scheme/small-scale-technology-certificates
Clean Energy Regulator. (n.d.). Voluntary offsetting and surrender. Retrieved from https://cer.gov.au/markets/voluntary-offsetting-and-surrender
Worrells. (n.d.). Director’s liability for company debts and liquidation. Retrieved from https://worrells.net.au/resources/news/directors-liability-for-company-debts
Worrells. (n.d.). Insolvent trading: How does a director become liable for insolvent trading? Retrieved from https://worrells.net.au/resources/knowledge/insolvent-trading-how-does-a-director-become-liable-for-insolvent-trading
FAQ
When exactly does a director become personally liable for insolvent trading?
Broadly, once the company incurs a debt at a time when you knew, or a reasonable person in your position would have suspected, that the company was insolvent, meaning it could not pay its debts as they fell due. The liability attaches to the new debts taken on after that point, which is why continuing to bank deposits and sign contracts as things slide is so dangerous (Boss Lawyers, n.d.). Get a professional assessment of solvency early rather than guessing at the line yourself.
Does safe harbour automatically protect me if I keep trading?
No. Safe harbour is a defence you have to earn by actually developing one or more courses of action reasonably likely to produce a better outcome than immediate liquidation, and it comes with conditions like keeping proper records, staying current on employee entitlements and tax, and getting appropriate advice (Boss Lawyers, n.d.). Simply hoping the next job saves you is not a plan and gets no protection.
What happens to STCs I have already registered if a job falls over?
The certificate exposure does not just disappear. There is a defined process around the surrender and cancellation of certificates, and value you booked from a job that is later cancelled or found non-compliant can turn into a liability (Clean Energy Regulator, n.d.). Registering aggressively on shaky jobs while the business is struggling stacks a certificate problem on top of an insolvent trading one.
Can I lose my house over unpaid company tax when the business closes?
Potentially, yes, and separately from insolvent trading. Director Penalty Notices can make you personally liable for the company’s unpaid PAYG withholding and superannuation, and liquidating the company does not always wipe that liability (Boss Lawyers, n.d.). This exposure grows the longer a struggling business keeps operating without remitting, which is one more reason to act early.
Is closing the business always the wrong outcome?
Not at all. An orderly, early wind-down where you finish the jobs you can, refund what you cannot deliver, keep your records clean and take professional advice is often the outcome that best protects your customers, your subbies and your personal position. The damage almost always comes from delay and denial, not from the decision to stop.