What is an Expression of Interest (EOI) and when should you submit one?

If you've been browsing government procurement portals, you've probably noticed that not every opportunity is a straightforward tender. Some are labelled as Expressions of Interest (EOIs) — and understanding what that means, and how to respond effectively, can open doors that a standard tender process wouldn't.

What is an Expression of Interest?

An Expression of Interest is a pre-qualification step in the government procurement process. Instead of publishing a full tender and evaluating detailed proposals from every respondent, the buying agency first asks the market to express their interest and capability. The agency then shortlists the most promising respondents and invites only those suppliers to submit a full tender response.

Think of it as a two-stage process: the EOI is stage one (who's interested and capable?), and the subsequent tender is stage two (give us your detailed proposal and pricing).

EOIs are distinct from other procurement document types. An RFT (Request for Tender) asks for a complete, evaluable proposal. An RFQ asks for pricing. An EOI asks whether you're interested and broadly capable — the detailed proposal comes later.

For a comprehensive overview of all tender document types, see our guide on what is a tender.

When do agencies use EOIs?

Government agencies typically use EOIs in several scenarios:

Large or complex procurements. When the procurement is significant enough that evaluating dozens of full tender responses would be impractical, an EOI helps the agency narrow the field to a manageable shortlist.

Market sounding. Sometimes agencies aren't sure what the market can offer. An EOI helps them understand the range of capabilities, innovative approaches, and pricing levels available before they finalise their tender specification.

Panel establishment. EOIs are commonly used when establishing procurement panels or standing offer arrangements. The EOI identifies qualified suppliers who are then placed on the panel for ongoing work.

Novel or specialised requirements. When the agency needs something unusual, an EOI helps identify which suppliers have the specialised capability before the agency invests time in preparing a detailed tender specification.

What to include in an EOI response

EOI responses are typically shorter and less detailed than full tender responses. They're not asking for your full methodology, detailed pricing, or comprehensive case studies. Instead, they want to understand:

Who you are. A brief company overview demonstrating your legitimacy, size, and relevance.

What you can do. A summary of your capabilities relevant to the specific opportunity. This should be tailored — don't submit your generic capability statement.

Evidence of experience. Two to four brief project summaries demonstrating you've delivered similar work. Include client names (where permitted), contract values, and outcomes.

Resources and capacity. An indication that you have the people, equipment, and financial capacity to deliver what's being described.

Interest confirmation. A clear statement that you are interested in being considered for the shortlist.

How to stand out in an EOI

Because EOI responses are typically shorter, every paragraph needs to count. Here's how to differentiate yourself:

Demonstrate understanding of the buyer's needs. Show that you've read the EOI documentation carefully and understand not just what they want, but why they want it. Reference their strategic objectives where possible.

Lead with your strongest, most relevant experience. Your best comparable project should be front and centre. If you've done exactly this type of work for a similar agency, say so clearly and early.

Be specific, not general. "We have extensive experience in facility management" is weak. "We manage 230,000 square metres of government office space across NSW and Victoria for four state agencies" is strong.

Keep it concise. Evaluators reviewing EOI responses may have dozens to read. A tight, well-structured three-page response that answers every question will score better than a rambling ten-page capability statement.

Common EOI mistakes

Submitting a generic capability statement. An EOI is not a brochure distribution exercise. Tailor your response to the specific opportunity.

Providing too much detail. Save the detailed methodology and pricing for the tender stage. The EOI is about demonstrating interest and capability, not providing a complete proposal.

Missing the deadline. EOI deadlines are absolute, just like tender deadlines. Submit early to avoid technical issues with portal uploads.

Not following the format. If the EOI specifies a response format, page limit, or required information, follow it exactly. Non-compliant EOIs are often excluded, just as with full tenders.

What happens after the EOI

If your EOI is successful, you'll be shortlisted and invited to participate in the next stage — usually a full tender process. This is where you submit your detailed methodology, pricing, team structure, and case studies.

Being shortlisted through an EOI is a significant advantage. The competition is limited to the shortlisted suppliers, so your odds of winning improve substantially compared to a fully open tender. You've also had the opportunity to understand the buyer's needs early, giving you more time to prepare your full response.

If your EOI is unsuccessful, many agencies will provide feedback on why you weren't shortlisted. This feedback is invaluable — use it to strengthen your positioning for future opportunities.

Finding EOI opportunities

EOIs are published on the same government procurement portals as tenders: AusTender for federal opportunities, and the respective state portals for state opportunities. They're sometimes categorised separately from open tenders, so make sure your alert settings capture both EOIs and tenders.

AI-powered tender search tools like AskTender include EOIs in their results alongside open tenders, so you can see the full picture of procurement opportunities in a single search.

For a deeper dive into the procurement process and how EOIs fit into the broader framework, read our expression of interest guide and our government procurement process guide.