You’ve settled. The business is yours. Then an ATO debt appears. Or an employee entitlement claim lands. Or a supplier sends an invoice that was never disclosed. The debt is real. The seller never mentioned it. And it was absolutely not factored into the price you paid.
Can you claim?
The answer is yes, but not in the way most buyers expect. There’s no freestanding right to compensation just because a liability was “hidden”. Your claim depends on what you bought, what the contract required the seller to disclose, and whether the seller gave enforceable promises about the business being free of undisclosed debts.
This article walks you through the framework that determines whether you have a claim, what kind of claim it might be, and what you need to do first when the problem surfaces.
Key Takeaways
- Your claim turns on the contract, warranties, indemnities, and disclosure schedules matter more than whether the debt was genuinely “hidden”
- Asset sales and share sales are not the same, if you bought shares, you bought the company and all its liabilities, disclosed or not
- You need evidence immediately, gather the contract, disclosure schedules, due diligence records, and correspondence before you notify the seller
- Timing matters, most sale contracts have strict notice requirements and time limits for bringing warranty claims
- Multiple pathways exist, you may have claims for breach of contract, misleading conduct, or misrepresentation, depending on what the seller said and did
- Commercial leverage can be more valuable than litigation, sometimes the threat of a claim is enough to negotiate a settlement without going to court
What Counts as a Hidden Liability in a Business Sale?
A hidden liability is any debt, obligation, or exposure that existed before settlement but was not disclosed to you as the buyer. It might be a tax debt, unpaid superannuation, an employee entitlement claim, a supplier invoice, a lease obligation, or a warranty claim from a customer.
The liability is “hidden” if you had no reasonable way to discover it during due diligence and the seller did not bring it to your attention.
But here’s the critical point: just because the liability was hidden does not automatically mean you can claim against the seller. The question is not whether the debt existed. The question is whether the seller promised it did not exist, or whether the seller had a duty to tell you about it under the terms of your contract.
If the contract required the seller to disclose all material liabilities and the seller stayed silent, you likely have a claim. If the contract had no such requirement and you bought the business “as is”, your position may be weaker.
Think about it this way: the contract is the rulebook. It defines what the seller owed you in terms of disclosure, and what remedies you preserved if the disclosure turned out to be incomplete.
A hidden liability is only a legal problem if it also represents a breach of the sale contract, a misleading statement, or a failure to disclose something the seller was required to disclose. The existence of the debt alone is not enough.
Why the Answer Changes If You Bought Shares Instead of Assets
The structure of the sale is fundamental to understanding who carries the risk of historical liabilities.
Asset Sale
In an asset sale, you buy the business’s assets, equipment, stock, goodwill, customer lists, intellectual property. You do not buy the company itself. You do not assume its debts unless you specifically agree to take them on.
If a hidden liability surfaces after an asset sale, the general rule is that the liability stays with the seller (the company that owned the business). The seller’s company remains liable for historical debts, unpaid taxes, employee entitlements, and supplier invoices that accrued before settlement.
Your claim is not about being stuck with the debt. Your claim is about whether the seller breached the contract by failing to disclose the liability, or by giving warranties that turned out to be false.
Share Sale
In a share sale, you buy the shares in the company. You become the owner of the company that ran the business. You acquire everything: the assets, the employees, the contracts, and the liabilities.
When you buy shares, you inherit all the company’s debts, whether disclosed or not. That is the legal consequence of owning the company.
So if a hidden ATO debt surfaces after a share sale, the company (which you now own) remains liable for it. The question is whether you can claim against the seller for not disclosing it, or for giving you warranties that the company had no undisclosed liabilities.
The difference is stark. In an asset sale, the hidden debt usually stays with the seller’s company. In a share sale, you own the company and the debt is yours. Your recourse is a claim against the seller for breach of warranty or misrepresentation.
If you are considering a share purchase, assume you are inheriting every liability the company has ever incurred. Your protection is not the structure of the sale. It is the warranties and indemnities you negotiate in the contract.
The Contract Terms That Usually Decide Whether You Can Claim
Most business sale contracts contain three key mechanisms that determine your rights if a hidden liability appears: warranties, indemnities, and disclosure schedules.
Warranties
A warranty is a promise the seller makes about the state of the business. Common warranties include:
- There are no undisclosed liabilities.
- All tax returns have been lodged and all taxes paid.
- All employee entitlements have been properly accounted for.
- There are no outstanding debts except those disclosed in the disclosure schedule.
If the seller gave a warranty and it turns out to be false, you may have a claim for breach of warranty. The remedy is usually damages: the amount you lost because the warranty was wrong.
The key is the wording. If the warranty says “no material undisclosed liabilities” and a small supplier debt surfaces, you may struggle to show the debt was “material”. If the warranty says “no undisclosed liabilities whatsoever”, your claim is stronger.
Indemnities
An indemnity is a promise to reimburse you for a specific loss. It is stronger than a warranty because it shifts the risk entirely to the seller.
For example, a contract might say: “The seller indemnifies the buyer against all liabilities arising from events before completion, whether disclosed or not.”
If you have an indemnity like that, your claim is straightforward. You notify the seller, quantify the loss, and pursue reimbursement. The seller cannot argue that the liability was not material or that you should have discovered it in due diligence.
Disclosure Schedules
A disclosure schedule lists all the liabilities, debts, disputes, and issues the seller is disclosing to you before settlement. Once something is in the disclosure schedule, the seller has disclosed it. You cannot later claim it was hidden.
The problem arises when the disclosure schedule is vague, incomplete, or buried in volumes of documents that were not genuinely brought to your attention.
If the seller disclosed a “contingent liability relating to employee entitlements” but did not quantify it, and a six-figure underpayment claim surfaces after settlement, you may still have a claim. The disclosure was too general to be effective.
The test is not just “was it mentioned somewhere?” The test is: did the disclosure give you a fair and reasonable opportunity to understand the liability and factor it into the purchase price?
The contract defines your rights. If it contains strong warranties and indemnities, you have recourse. If it says you bought the business “as is” with no warranties, your position is weaker, and you may need to rely on misleading conduct claims instead.
What Kinds of Claims May Be Available?
When a hidden liability surfaces, you may have several pathways to recovery. The strongest claims usually sit in one of three categories.
Breach of Warranty or Indemnity
If the seller gave you a warranty that there were no undisclosed liabilities and that warranty was false, you have a breach of contract claim. The measure of loss is usually the amount of the liability plus any consequential losses you can prove, subject to any caps or exclusions in the contract.
If the seller gave you an indemnity, your claim is even clearer. You notify the seller, quantify the loss, and demand reimbursement under the indemnity clause.
Misleading or Deceptive Conduct
Even if the contract is weak on warranties, you may have a claim under the Australian Consumer Law if the seller made representations that were misleading.
For example, if the seller told you during negotiations that “all taxes are up to date” or “there are no employee issues”, and those statements were false, you may have a claim under section 18 of the Australian Consumer Law (misleading or deceptive conduct in trade or commerce).
The advantage of a misleading conduct claim is that it does not depend on the contract. It depends on what was said, what was implied, and whether you relied on it when deciding to buy the business.
The test is whether the seller’s conduct, taken as a whole, was likely to mislead or deceive a reasonable buyer. Silence can sometimes be misleading, particularly if the seller knew about a material liability and said nothing when asked direct questions during due diligence.
Common Law Misrepresentation
If the seller made a specific false statement of fact (not just a vague opinion or forecast), and you relied on it, you may have a claim for misrepresentation. The remedies can include rescission (unwinding the sale) or damages.
Misrepresentation claims are harder to prove than misleading conduct claims because they require a clear false statement, not just misleading silence or omission. But they remain a viable pathway in cases where the seller actively concealed a known liability.
Do not assume your only claim is the one that looks obvious. If the contract warranties are weak, consider whether the seller made representations during negotiations that amount to misleading conduct. That pathway does not depend on the contract wording.
What Evidence You Need to Gather Immediately
If you discover a hidden liability, your first instinct may be to call the seller and demand an explanation. Do not do that yet. Gather evidence first.
The outcome of any dispute will turn on what you can prove. You need a clear record of what the seller disclosed, what the seller promised, and what you relied on when deciding to proceed with the purchase.
Documents to Secure
- The sale contract, including all schedules and annexures
- The disclosure schedule (if there was one)
- All correspondence between you and the seller during negotiations and due diligence
- Any responses the seller gave to due diligence questions
- The vendor’s due diligence questionnaire (if one was completed)
- Financial records provided by the seller before settlement, including tax returns, BAS statements, profit and loss statements, and balance sheets
- Settlement statements and adjustments
- Any written representations the seller made about liabilities, debts, or compliance
Evidence of the Liability
- The debt notice, invoice, or demand that triggered the discovery
- Any supporting documents that show when the liability arose and why it was not disclosed
- ATO records showing when the debt was incurred and whether it was reflected in the seller’s lodgements
- Employment records, payroll reports, or superannuation statements if the liability relates to employee entitlements
- Supplier records, contracts, or purchase orders if the liability is a trade debt
Your Own Records
- Notes from meetings with the seller or the seller’s advisers
- Your own due diligence reports, accountant’s advice, or lawyer’s completion memo
- Any questions you asked about liabilities and the answers you received
The stronger your evidence, the stronger your negotiating position. If you can show that the seller gave specific warranties, that you asked clear questions during due diligence, and that the seller either stayed silent or gave false answers, your claim is powerful.
If your evidence is thin, the seller will argue you should have discovered the liability in due diligence, or that the liability was not material, or that it was disclosed somewhere in the pile of documents you received before settlement.
Assume the seller will dispute your claim. Gather every relevant document now, before memories fade and emails get deleted. Your ability to prove what was said and what was disclosed will determine whether you recover anything.
How Timing and Notice Requirements Can Affect Recovery
Most sale contracts impose strict time limits and notice requirements on warranty claims. If you miss the deadline, you lose the right to claim, even if the warranty was clearly breached.
Notice Requirements
A typical contract might say: “The buyer must notify the seller in writing of any warranty claim within 30 days of becoming aware of the breach.”
If you discover a hidden liability and fail to notify the seller within that window, your claim may be barred. The seller will argue you are out of time, and the contract terms will likely support that defence.
Even if the contract does not specify a notice period, you should notify the seller as soon as reasonably possible. Delay weakens your position and suggests the liability was not as serious or unexpected as you now claim.
Time Limits for Bringing Claims
Many contracts also impose an overall time bar on warranty claims. For example: “No warranty claim may be brought more than 12 months after settlement.”
Once that period expires, your contractual remedies are gone. You may still have a misleading conduct claim (which has its own limitation period, usually six years), but your ability to rely on the contract warranties ends.
If the contract is silent on time limits, the general limitation period for contract claims applies (usually six years from the date of breach).
Minimum Claim Thresholds
Some contracts include a minimum threshold for claims. For example: “The buyer may only bring a warranty claim if the loss exceeds $10,000.”
If the hidden liability is below that threshold, your contractual remedy is blocked. You may still be able to pursue a misleading conduct claim, but the practical question becomes: is the cost of litigation worth it?
The timing rules are not negotiable. They are in the contract. If you miss them, you are out. The message is simple: act fast.
Calendar the notice deadline and the claim deadline as soon as you discover the liability. Do not wait for your lawyer to tell you to act. The clock is ticking from the moment you become aware of the problem.
What Happens If the Seller Disputes the Debt or Has No Money?
You may have a strong claim on paper. The seller breached the warranties. The evidence is clear. The liability is real. But the seller disputes it, or the seller has no assets, or the seller’s company has been wound up.
This is the commercial reality that often determines whether a claim is worth pursuing.
The Seller Disputes the Debt
The seller may argue:
- The liability was disclosed in the disclosure schedule (even if you did not notice it).
- The liability was not material and does not trigger the warranty.
- You should have discovered it during due diligence.
- The liability arose after settlement, not before.
- The debt is disputed by the creditor and may not be payable.
If the seller disputes the claim, you face a choice: negotiate a settlement, or litigate. Litigation is expensive. Even if you win, you may not recover your legal costs in full.
This is where evidence matters. If you have clear documentary proof that the liability existed before settlement, that it was not disclosed, and that the seller warranted there were no undisclosed liabilities, the seller’s negotiating position is weak. Most sellers will settle rather than defend an unwinnable case.
The Seller Has No Money
If the seller was a company and the company has been deregistered or wound up, your claim may be worthless. You cannot enforce a judgment against a company that no longer exists.
If the seller was an individual and has no assets, pursuing the claim may be commercially pointless. You might win a judgment, but collecting on it is a different problem.
This is why investigating the seller’s financial position before settlement is critical. If the seller is insolvent or asset-poor, your only realistic protection is a strong indemnity backed by a parent company guarantee, an escrow holdback, or directors’ personal guarantees.
When Commercial Leverage Is More Valuable Than Litigation
Sometimes the best outcome is not a court judgment. It is a negotiated settlement where the seller agrees to pay part of the liability, or agrees to an adjustment to the purchase price, or agrees to indemnify you against any claim from the creditor.
If the seller is solvent and wants to protect their reputation, the threat of a claim may be enough to bring them to the table. If the seller is insolvent or combative, litigation may be the only option, but you need to assess whether it is worth the cost and risk.
A strong legal claim does not always translate into a commercial recovery. Before you commit to litigation, assess the seller’s financial position, the strength of your evidence, and whether the size of the liability justifies the cost and time of a dispute.
Understanding What Loss You Can Actually Recover
Discovering a hidden liability is frustrating. But the legal question is not “was this unfair?” The question is “what loss did you suffer?”
If the liability is an unpaid ATO debt and you bought the business through an asset sale, the debt usually stays with the seller’s company. You have not suffered a financial loss. Your claim is not about the debt itself. It is about whether the existence of the debt means you overpaid for the business.
If you bought the shares and you now own the company that owes the debt, your loss is clear: the amount of the debt. Your claim is to recover that amount from the seller under the warranty or indemnity provisions.
Calculating Overpayment
If you can show that the hidden liability was material and you would have negotiated a lower purchase price if it had been disclosed, your loss is the difference between what you paid and what you should have paid.
For example, if you paid $500,000 for a business and a $50,000 ATO debt surfaces that was not disclosed, your loss is arguably $50,000 (or the net present value of that liability factored into the price).
Proving this requires evidence. You need to show that the purchase price was calculated on the assumption that no such liability existed, and that a reasonable buyer would have adjusted the price downward if the liability had been known.
Consequential Losses
You may also have consequential losses: the cost of investigating the liability, the cost of settling it, penalties or interest imposed by the ATO, and any damage to the business caused by the creditor taking enforcement action.
Whether you can recover those losses depends on the contract. Most contracts limit liability to direct losses only, excluding consequential or indirect losses. If your contract has that kind of exclusion, your claim is limited to the amount of the debt itself.
Limits and Caps
Many contracts cap the seller’s total liability under the warranties. For example: “The seller’s total liability for warranty claims shall not exceed the purchase price.”
If the cap is lower than the liability, your recovery is capped. If the contract excludes certain kinds of loss, you cannot claim them, even if they are real.
The contract defines the boundaries of what you can recover. The legal analysis starts and ends with the contract terms.
Before you notify the seller, work through the numbers with your lawyer or accountant. Quantify the liability, calculate your loss under the contract, and factor in any caps or exclusions. That calculation shapes your negotiating strategy.
What to Do First If You Discover a Hidden Liability
You discover the debt. You are angry. The seller said there were no issues. The contract had warranties. This should never have happened.
Here is your first-response checklist.
Stop and Document
Do not make any payments, admissions, or commitments to the creditor until you understand your position. Secure all the evidence listed earlier in this article. Preserve emails, contracts, and disclosure documents. Photograph or scan anything that might go missing.
Review the Sale Contract
Read the warranties. Read the indemnities. Read the disclosure schedule. Check the notice requirements and time limits. Identify whether the liability falls within the scope of a warranty or indemnity, or whether it was arguably disclosed (even if you did not notice it).
If you do not have a clear understanding of the contract, get legal advice immediately. The clock is ticking, and missing a notice deadline could cost you your entire claim.
Assess the Liability
Is it real? Is it disputed? When did it arise? Is there documentation proving it existed before settlement? Is the amount fixed or contingent?
Do not assume the creditor’s claim is correct. Verify it. Get copies of invoices, tax assessments, superannuation records, or whatever supports the debt. If the debt is disputed or overstated, that affects your claim against the seller.
Quantify Your Loss
Work out what the liability actually costs you. If it is an ATO debt in an asset sale, it may not cost you anything directly. If it is a debt you are now liable for in a share sale, quantify the amount, including interest and penalties.
Factor in any costs of investigation, settlement, or enforcement action. Then calculate what you can recover under the contract, taking into account caps, exclusions, and the strength of your evidence.
Notify the Seller
Once you have gathered the evidence, reviewed the contract, and quantified your loss, notify the seller in writing. Your notice should:
- Identify the liability and when you discovered it
- State that it was not disclosed before settlement
- Refer to the specific warranty or indemnity provision you are relying on
- Quantify your loss (even if the calculation is preliminary)
- Require the seller to respond within a reasonable period (usually 14 to 21 days)
- Reserve your rights to claim damages, interest, and costs
Do not make the notice emotional or accusatory. Keep it factual, precise, and professional. The notice starts the formal dispute process. It may be used as evidence later. Make it count.
Engage a Lawyer
If the liability is material, get legal advice before you send the notice. A lawyer can help you frame the claim correctly, identify all available causes of action, and ensure you comply with notice and timing requirements.
If the seller disputes the claim or refuses to engage, you will need a lawyer to assess whether litigation is viable and commercially sensible.
Treat the discovery of a hidden liability like a workplace injury: stop, secure the scene, document everything, and get expert help before you take action. Rushing into a confrontation with the seller without preparation weakens your position and may cost you your legal rights.
When the Claim Is Commercial Leverage, Not Litigation
Not every hidden liability ends in court. In fact, most do not.
The discovery of an undisclosed debt is often the catalyst for a renegotiation. The buyer notifies the seller. The seller’s lawyer reviews the contract. Both sides assess the strength of the claim and the cost of defending it. Then they negotiate.
The outcome might be:
- The seller pays the liability in full
- The seller pays a proportion of the liability as a settlement
- The purchase price is adjusted retrospectively by way of a refund or credit
- The seller indemnifies the buyer against any claim from the creditor, even if the seller does not pay the debt directly
- The parties agree to split the cost, particularly if the liability was marginal or partially disclosed
This is not a compromise. It is a commercial resolution. Litigation is expensive, uncertain, and time-consuming. If both parties can agree on a fair adjustment, that outcome is often better than years of dispute.
The key is leverage. If your evidence is strong, if the contract supports your claim, and if the seller has assets worth protecting, you have leverage. Use it to negotiate a settlement that reflects the real loss without the cost and delay of court proceedings.
If the seller refuses to engage, or disputes the claim without a credible defence, litigation may be the only option. But you should approach litigation as the last resort, not the default.
The threat of a well-founded claim is often more valuable than the claim itself. If you can demonstrate clear breach, quantifiable loss, and strong evidence, most sellers will settle rather than litigate. Position your claim as a commercial problem with a commercial solution.
Final Thoughts: Clarity and Evidence Win Disputes
Discovering a hidden liability after buying a business is not just frustrating. It is a test of whether you preserved your legal rights during the sale process.
Your ability to claim depends on what you bought, what the contract says, and whether you can prove the seller breached a warranty, gave misleading representations, or failed to disclose something they were required to disclose.
The strongest claims are built on three foundations: clear contract terms, solid evidence, and fast action. If you have all three, your claim is viable. If you are missing one or more, your path to recovery is harder.
Do not assume that just because the liability was hidden, you automatically have a claim. The legal analysis is more nuanced than that. The contract is the rulebook. Your evidence determines whether you can prove a breach. And the commercial realities, whether the seller has money, whether litigation is worth the cost, shape whether your claim translates into actual recovery.
If you discover an undisclosed debt, stop, gather evidence, review the contract, and get advice before you act. The decisions you make in the first few weeks will determine whether you recover anything at all.
The best protection against hidden liabilities is not the claim you bring after the problem surfaces. It is the contract you negotiate before settlement. Strong warranties, clear indemnities, and thorough disclosure schedules are worth far more than litigation after the fact.
Disclaimer: This article provides general information only and does not constitute legal advice. Every business sale is different, and the outcome of any claim depends on the specific facts, the wording of the contract, and the applicable law. If you have discovered a hidden liability after buying a business, seek legal advice immediately to preserve your rights and assess your options.
