A civil contractor is bidding a council road reconstruction. The project engineer is someone they have worked with for fifteen years. Halfway through the tender period, with a genuine question about a service alignment, they ring him directly — as they have a hundred times on live jobs — and he answers it helpfully.

Both of them have just created a problem. The conditions of tendering nominated a single contact officer and prohibited contact with anyone else about the procurement. The answer was given to one bidder and not the others. Depending on the council and the substance of what was said, the outcomes range from an addendum issued to everyone, through a written warning, to the bid being set aside.

Nobody in that story was dishonest. That is the point of this guide: probity failures in civil tendering are usually relationship failures rather than corruption, and they are avoidable once you know where the lines sit. This covers the tenderer’s obligations during a procurement. If you believe a process has gone wrong and want to do something about it, that is a different subject — see our guide to requesting a tender debrief, which covers complaints and escalation.

What probity actually means, and what it does not

Probity in procurement means integrity, uprightness and honesty in the process. In practice it is a set of principles that a buyer must be able to demonstrate it followed, and that bidders must not undermine.

• Fairness and impartiality — every bidder treated the same way, on the same information.
• Consistency and transparency of process — the rules stated up front are the rules applied.
• Security and confidentiality — your pricing is not shown to your competitors, and theirs is not shown to you.
• Identification and management of conflicts — not elimination, management.
• A defensible, documented process — decisions that can be explained afterwards.

Two clarifications save a lot of confusion.

• Probity is about process, not outcome. A probity-compliant process can still produce a decision you think is commercially wrong. “They picked the wrong contractor” is not a probity complaint.
• A probity adviser is not a referee for bidders. Where a buyer appoints one on a large or sensitive procurement, that adviser works for the buyer. They are not somewhere to take a grievance, though they are a reason to expect the process rules to be enforced strictly.

Why it is your problem, not just the buyer’s

Contractors tend to read probity clauses as the buyer’s internal housekeeping. They are obligations you accept when you lodge.

• The conditions of tendering bind you. Lodging a tender is acceptance of those conditions, and they typically include contact restrictions, confidentiality, a conflict declaration and a no-collusion statement.
• You usually sign a declaration. Most Australian government and council tender forms require a signed statement about conflicts and independent pricing. Signing it carelessly is its own exposure.
• The consequence sits with you. A buyer that finds a probity problem protects its own process by excluding the bid. The cost of that falls entirely on the bidder.
• It follows you. Probity findings are remembered by procurement teams and can affect prequalification and panel standing well beyond the tender in question.
• Some of it is law, not policy. Collusive tendering is a competition law matter with criminal exposure, quite separate from any tender condition.

The contact rule, and the call that voids a bid

This is the rule most often broken by honest contractors, because it runs directly against how the industry normally works.

From advertisement to award, almost every public procurement nominates a single contact and prohibits approaches to anyone else about the procurement — including the project engineer you know, the asset manager, the consultant who wrote the specification, and elected members.

Situation	Safe	Not safe
A technical question about the tender	Submit it through the nominated channel in the clarification window	Ringing the designer because it is quicker
Meeting the client at an industry event	Normal courtesy; do not discuss the live procurement	“So how are we looking on the Smith Street job?”
Delivering another contract for the same client	Business as usual on that contract	Raising the live tender with the superintendent on site
Wanting the scope clarified	A written question; the answer goes to all bidders as an addendum	A site meeting arranged privately
A councillor you know offers to help	Decline, politely and in writing if necessary	Accepting, which can damage both of you

Two practical notes. Tell your people. The breach is usually committed by an estimator or a supervisor who never read the conditions of tendering, so a one-line instruction at bid kick-off — all contact through this person only, until award — prevents most of it. And if contact happens accidentally, disclose it promptly. A self-reported, trivial, immediately-disclosed contact is almost always managed with an addendum. The same contact discovered later looks like concealment.

Using the clarification process properly is the substitute for all of this, and it is underused — see our guide to tender clarifications and the RFI window.

Conflicts: actual, potential and perceived

The word “conflict” makes contractors defensive because it sounds like an accusation. It is not. A conflict of interest is a circumstance, not a wrongdoing; the wrongdoing is failing to declare or manage it.

Type	Meaning	Civil example
Actual	A real conflict exists now between a private interest and the duty owed	The evaluator’s spouse is a director of a bidding company
Potential	A private interest could conflict in future	A bidder is in advanced negotiations to acquire a competing bidder
Perceived	A reasonable person might think impartiality is affected, whether or not it is	The successful bidder’s estimator left the client’s employment three months ago

Perceived conflicts are the ones that cause trouble, precisely because the people involved know nothing improper happened and therefore see nothing to declare. The test is not whether you behaved properly. It is whether a reasonable, informed outsider could doubt it. In regional Australia, where everyone has worked with everyone, this is a frequent and entirely manageable situation — provided it is on the table.

The conflicts that actually arise in civil work

• You employ a former employee of the client, particularly one who worked on this project or in this procurement area.
• A relative or close associate works for the buyer, sits on the council, or is on the evaluation panel.
• You share a consultant with the client. The engineer who designed the job also does your temporary works design.
• You are bidding against a company you are in a joint venture with elsewhere, or against a subcontractor you also rely on — see joint venture and consortium bidding.
• Your subcontractor is quoting more than one bidder, which is normal, but becomes a problem if information moves with the quote.
• You own or have an interest in a quarry, a tip or a plant hire business that the contract will source from, and the contract contemplates competitive sourcing.
• You helped scope the work. Advising on, writing or costing a specification and then bidding it is the clearest conflict in the list — and sometimes an outright bar.
• A director holds another role on a board, a committee or an industry body that touches the buyer.

Most of these are routine and manageable. The one to be genuinely careful about is the last-but-one: involvement in scoping or design work, even unpaid, can disqualify you from bidding the resulting contract. If a client asks you to help develop a scope, ask the probity question before you help, not after.

How to declare one without losing the job

Contractors avoid declaring because they assume declaration means exclusion. Usually it is the opposite: declared conflicts are managed, undeclared ones are fatal when found.

• Declare early. At lodgement, or as soon as you become aware. A declaration made after the shortlist looks like one made because you thought you would be caught.
• Declare in writing, through the nominated contact. Not verbally at a site meeting.
• State the facts, not your conclusion. Who, what relationship, what period, what involvement. Let the buyer assess it; that is their job and their risk.
• Propose management, do not just raise a problem. This is what separates a professional declaration from an awkward one — see the options below.
• Be complete. A partial declaration that omits the significant part is worse than none, because it demonstrates you knew the obligation existed.

Management measures a buyer will recognise, and that you can offer:

Measure	Suits
Information barrier — the person is walled off from the bid, in writing	A former employee of the client now working for you
Removal from the bid team	A close relationship with an evaluator
Separate consultants — you engage a different firm from the client’s	A shared designer or adviser
Disclosure to all parties and a written acknowledgement	Small-town relationships that cannot be removed
Withdrawal from this procurement	Involvement in scoping, or a conflict that cannot be managed

Confidential information and the unfair advantage test

Two separate obligations sit here, and bidders tend to think only about the first.

• Information the buyer gives you is confidential. Tender documents, drawings, site data and addenda are generally provided on terms restricting their use and disclosure. Passing a specification to a supplier for pricing is normally fine; posting it, or using it on another job, generally is not.
• Information you hold that others do not can create an unfair advantage. This is the harder one. Knowing the site because you maintain it is legitimate incumbency. Holding the buyer’s internal cost estimate, its evaluation plan, or a competitor’s pricing is not, however it reached you.

If confidential information arrives that you should not have, the only safe response is to stop, not read further, and tell the buyer in writing. This happens more often than people admit — a misdirected email, a document left on a portal, a competitor’s price visible in a shared folder. Reporting it protects your bid; quietly using it can end the business relationship and worse.

Incumbency: an advantage, not a conflict

Incumbents worry that their knowledge is a probity problem. Generally it is not, and the distinction is worth being clear about because it affects how you bid.

• Legitimate: knowing the network, the ground, the client’s standards and the practical difficulties, because you have been doing the work. You may use all of it.
• Legitimate: having lower mobilisation costs or existing site establishment, and pricing accordingly.
• Not legitimate: using information about the procurement itself — the budget, the evaluation approach, other bidders — obtained through your position.
• Grey, and worth declaring: where your staff are embedded in the client’s team, or where your people would be involved in preparing or assessing the very tender you are bidding.

Buyers manage incumbency by releasing asset data to all bidders. If you are the incumbent, assume that will happen; if you are not, ask for it in the clarification window. The incumbency dynamic in maintenance work generally is covered in our guide to term maintenance contracts.

Collusion, cover pricing and the line that is criminal

Everything above is procurement policy. This part is competition law, and it carries consequences of a different order — including criminal liability for individuals.

Arrangements between competitors about bidding are prohibited, and the forms it takes in civil construction are specific:

• Cover pricing. Submitting a deliberately high bid so another contractor wins, usually as a favour to stay on a tender list. Contractors frequently do not realise this is unlawful rather than merely untidy. It is the single most common form in this industry.
• Bid rotation. Taking turns to win across a series of tenders.
• Market or customer sharing. Agreeing who bids which councils, regions or clients.
• Agreeing not to bid, or to withdraw.
• Exchanging price information with a competitor before lodgement, however informally.
• Compensation payments to an unsuccessful bidder for its bid costs under an arrangement.

Three things civil contractors should know. It does not require a written agreement — an understanding reached in a car park is enough. Legitimate joint bidding is different: a genuine joint venture or a consortium, properly disclosed, is lawful and common. And a subcontractor quoting several head contractors is normal and lawful, provided it is not a channel for price information between them.

If you are ever asked to put in a cover price, the correct answer is no, and the safe follow-up is to decline the tender rather than submit a number you did not price. There are immunity arrangements for the first participant to report a cartel, which is worth knowing exists.

Gifts, hospitality and the site lunch

Civil construction runs on relationships, and most contractors are genuinely surprised by how strictly public sector gift rules are drawn.

• During a live procurement, offer nothing. Not lunch, not a site tour with catering, not tickets, not a bottle at Christmas. Timing is most of the problem.
• Public sector officers usually must declare anything they accept, often above a low threshold, and many agencies prohibit acceptance from current or prospective suppliers entirely.
• Normal business courtesy outside a procurement — coffee at a meeting, a site visit — is ordinarily fine, but read the room and the agency.
• Sponsorship and industry events need care. Sponsoring a council event while bidding its work is a question to ask in advance.
• Never put an officer in a position where they must decline. That damages the relationship you were trying to build.

The workable rule for a civil SME is simple: if accepting it would need to be declared, offering it was probably a mistake.

Former public servants and the people you hire

Hiring from your clients is normal in civil construction and often the best way to get someone who understands the work. It also carries post-separation obligations that attach to the person and reach you.

• Ask what they are bound by before they start: a cooling-off period, restrictions on dealing with their former agency, and continuing confidentiality obligations.
• Do not ask them for information they are not entitled to share. Not the estimate, not the evaluation approach, not who else is bidding. Putting them in that position is unfair to them and dangerous for you.
• Declare it where they touch a bid to their former employer, with an information barrier if needed.
• Record the barrier. A dated file note that the person was excluded from the bid is the evidence that makes the declaration credible.
• Be careful with their contacts. Using a new employee’s relationships to make contact outside the nominated channel is the contact breach in §03 wearing a different hat.

The recruitment side of this — where experienced people come from and how to keep them — is covered in our guide to attracting and retaining workers.

What happens when it goes wrong

Issue	Typical consequence
Minor contact breach, self-reported	An addendum to all bidders; the bid continues
Contact breach discovered by the buyer	Warning, or exclusion where the information gave an advantage
Undeclared conflict, discovered during evaluation	Exclusion from the procurement
Undeclared conflict, discovered after award	Termination rights, and a prequalification problem
Misuse of confidential information	Exclusion, possible legal action, lasting reputational damage
Cartel conduct	Regulator investigation, substantial penalties for the company, and criminal exposure for individuals

The pattern across the table is consistent: disclosure converts most of these into administrative events; concealment converts them into exclusions. The consequence also outlives the tender, because financial and integrity standing are continuing conditions of most prequalification schemes — see civil contractor prequalification in Australia.

A proportionate system for a civil SME

This does not need a policy manual. For a business of twenty or fifty people it needs four things.

• A one-page statement covering contact rules, confidentiality, conflicts, gifts and independent pricing. One page that people read beats twelve that they do not, and clients increasingly ask whether you have one.
• A conflicts register. A spreadsheet listing declared interests — relatives at clients, former employers, directorships, ownership interests — reviewed when a bid starts.
• A bid kick-off item. Thirty seconds at the start of every bid: here is the nominated contact, nobody else talks to the client about this, does anyone have an interest to declare.
• A named decision-maker. One person decides whether something gets declared, so the question does not die in an estimator’s inbox.

Worth adding to the tender library as reusable content, since the question “describe your probity and conflict of interest arrangements” now appears in prequalification applications as well as tenders — see building a tender content library.

Checklist

• Has everyone on the bid been told who the nominated contact is, and that nobody else may be approached?
• Have you read the probity and conflict clauses in the conditions of tendering, rather than signing the form?
• Is there a conflicts register, and was it reviewed when this bid started?
• Does anyone on the bid team have a relationship with the buyer that a reasonable outsider might question?
• Have you employed anyone from this client in the last twelve months?
• Are you using any consultant the client is also using?
• Did you contribute to the scope, specification or estimate for this work?
• Have declarations been made in writing, through the nominated channel, with proposed management measures?
• Is information barrier evidence recorded and dated?
• Has anyone received information they should not have, and was it reported?
• Is your pricing arrived at independently, with no contact with competitors about this bid?
• Has anyone been asked to provide, or provided, a cover price?
• Has any hospitality or gift been offered to the buyer during this procurement?
• If accidental contact occurred, was it disclosed promptly and in writing?
• Do you have a one-page probity statement you could attach to a prequalification application?

The short version

• Probity binds tenderers, not just buyers. Lodging a tender is acceptance of the contact, confidentiality, conflict and no-collusion conditions.
• Probity is about process, not outcome. A fair process can still pick someone else.
• The contact rule is the one honest contractors break, because it runs against how the industry normally works. Tell the whole bid team at kick-off.
• Accidental contact, disclosed promptly, is usually managed with an addendum. Discovered later, it looks like concealment.
• A conflict is a circumstance, not a wrongdoing. Perceived conflicts cause the most trouble because nobody thinks they need declaring.
• Declared conflicts are managed; undeclared ones end bids. Declare early, in writing, with proposed management measures.
• Helping scope or specify work can bar you from bidding it. Ask before you help, not after.
• Incumbent knowledge of the site and the work is legitimate advantage. Knowledge of the procurement is not.
• If confidential information arrives that you should not have, stop reading and report it in writing.
• Cover pricing is unlawful, not merely untidy, and it is the most common form of collusion in this industry. No written agreement is needed for it to be a cartel.
• During a live procurement, offer no gifts or hospitality at all. If accepting would need to be declared, offering was a mistake.
• Hiring from a client is normal, but ask what post-separation obligations they carry and never ask them for information they cannot share.
• A one-page statement, a conflicts register, a kick-off item and a named decision-maker is a proportionate system for an SME — and prequalification schemes now ask for it.

Sources and further reading

This guide is general information for Australian civil construction businesses and is not legal or procurement advice. Probity requirements, contact rules, conflict declaration obligations, gift and hospitality thresholds and post-separation employment restrictions are set separately by Commonwealth, state, territory and local government procurement frameworks and codes of conduct, and differ between buyers and between individual procurements. The conditions of tendering for a particular procurement govern, and they frequently impose stricter requirements than the general framework. Competition law prohibitions on cartel conduct are Commonwealth law carrying civil and criminal consequences for companies and individuals; nothing here should be relied on to assess whether particular conduct is lawful. If you are concerned about a possible breach, obtain legal advice before acting. Information is current as at October 2026.

• Australian government procurement frameworks and the probity principles they apply, referenced in §01 and §02 — fairness and impartiality, consistency and transparency, confidentiality, conflict management and a defensible documented process. These are set separately at Commonwealth, state, territory and local government level and are given effect in each procurement by its conditions of tendering. The Commonwealth framework is sourced in full in our guide to the Commonwealth Procurement Rules, and the state frameworks in our guides to Buy NSW, Buying for Victoria and the Queensland Procurement Policy.
• Commonwealth competition law prohibitions on cartel conduct referenced in §09, covering price fixing, bid rigging, market sharing and output restriction, which carry civil penalties and criminal liability for corporations and for individuals, and under which an immunity policy operates for the first participant to report. Whether particular conduct amounts to a contravention is a question of law and of fact.
• Public sector codes of conduct and gift, benefit and hospitality policies referenced in §10, and post-separation employment restrictions applying to former public officials referenced in §11. These are made separately by each agency, department and council, differ in their thresholds and duration, and bind the officer rather than the contractor — but a contractor that induces a breach creates its own exposure.
• Related TenderBuilt guides carrying the primary-source detail referenced above: tender clarifications and the RFI window, requesting a tender debrief (which covers complaints and escalation where you believe a process has gone wrong), how government tenders are scored, joint venture and consortium bidding, and civil contractor prequalification.