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Aussie investors doing on-the-ground due diligence in Cambodia — meetings with lawyers, accountants, prospective JV partners, property inspections — need the Business eVisa, not the Tourist. $90 USD (~$137 AUD) all-in is the correct class whether the trip is pure investigation or closing a deal, since the E-Class covers meetings, paid consulting, due-diligence, and sales calls without distinction.

The Cambodia Business eVisa (E-Class) — $90 USD (~$137 AUD) all-in, approved in 3 business days, delivered as a printable PDF by email, valid 3 months from issue, 30-day stay on arrival. Aussie investors flying in for due-diligence — lawyer meetings, accountant consultations, prospective JV partner discussions, property inspections, target-company walk-throughs — need the Business class regardless of whether the trip is pure investigation or includes a deal-signing element. Cambodian Immigration does not distinguish between 'looking only' and 'closing a deal' — both fall inside the Business category, which expressly covers meetings, paid consulting work, sales calls, supplier visits, and due-diligence.
Cambodia's inbound investment story has matured. The 2023-25 period saw Aussie family offices, mid-market private equity desks, and corporate venture arms making serious approaches to Phnom Penh — fintech minority stakes, real estate joint ventures, agribusiness offtake structures, hospitality co-investments. The on-the-ground due-diligence trip is now a routine sequence: a week in country, three or four days of lawyer and accountant meetings, a JV partner working session, a site walk-through, and a flight home with a draft term sheet in the laptop bag. The Aussie investor at the KTI immigration desk in 2026 is a common face, not a rare one.
The visa-class question that gets asked most often: 'I'm not signing anything yet, I'm just investigating — surely the Tourist eVisa covers a few meetings?' The honest answer is no. Cambodian Immigration treats due-diligence as business activity by default, whether or not a transaction closes, and the Business eVisa at $90 USD (~$137 AUD) is the correct class for any week that involves structured meetings with lawyers, accountants, prospective partners, or target-company management. The $10 USD (~$15 AUD) step up from the Tourist class is the smallest line item in any DD budget.
This is the due-diligence desk guide for Aussie investors heading to Cambodia in 2026 to investigate, scope, or close a JV or minority-stake transaction. The Cambodia Business visa for Australians anchor covers the full E-Class breakdown, the short-stay business meeting trip guide runs the parallel 3-7 day meeting pattern, and the Tourist vs Business detailed comparison covers the wider class-choice picture for borderline cases. For the umbrella view across cost, processing time, and documents, see the Cambodia visa application for Australians hub.
The cleanest framing for any Aussie investor wondering about visa class: Cambodian Immigration does not distinguish between an investor who is 'just looking' and an investor who is signing documents on the trip. Both sit inside the Business eVisa (E-Class) category. The category itself is broad by design — meetings, paid consulting work, sales calls, conferences, supplier visits, due-diligence, and long stays are all expressly covered. The visa class is determined by the purpose of the trip, not by whether the trip results in a transaction.
This matters because Aussie investors often try to fit the trip into the Tourist class by reasoning that no money will change hands during the visit itself. The reasoning sounds principled — the meetings are exploratory, the JV is hypothetical, the property inspection is pre-decision. But Cambodian Immigration reads the trip as business the moment the e-Arrival Card asks for the purpose of your visit and you answer with anything involving a Cambodian counterparty's commercial business. A candid answer like 'meeting with our legal advisor in Phnom Penh' or 'site visit at a target investment property' does not match a Tourist visa in your passport, and the immigration officer may notice the mismatch.
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If you are billing time to a client or a deal vehicle while in Cambodia — drafting a term sheet, writing an investment memo, taking client calls, charging hours to a fund — that paid work sits inside the Business eVisa. The category explicitly covers paid work in addition to meetings, conferences, sales calls, supplier visits, and due-diligence. There is no separate Cambodia 'consultant' or 'contractor' visa for a short DD week. Business eVisa is the single answer for any investor or advisor flying in to work on the ground. The Australian eVisa application walkthrough has the click-by-click for the Business form.
Before lodging the Business eVisa, most experienced Aussie investors run a pre-trip briefing with one or both of the two key Australia-Cambodia organisations: Austrade Cambodia (the Australian Government's trade and investment commission, with a Phnom Penh post) and AustCham Cambodia (the Australian Chamber of Commerce in Cambodia, the bilateral business community body). Both organisations brief inbound investors on the legal landscape, foreign-ownership rules, sector-specific licensing requirements, and the realistic timing for due-diligence and JV-formation work. The pre-trip call is usually free, and the warm introductions to lawyers, accountants, and prospective partners are often more valuable than the briefing itself.
The standard sequence for a first-time investor: book a 30-minute call with Austrade Cambodia three to four weeks before the planned DD trip, walk through the investment thesis and the questions you need answered on the ground, and ask for a list of suggested professional service providers (typically two or three law firms, two or three accounting firms, and any relevant industry-specific advisors). Two weeks before the trip, do the same with AustCham — their member network often surfaces JV partner candidates and operating-company counterparties that Austrade does not. By the time you lodge the Business eVisa ten days before the flight, the on-the-ground week is mostly scheduled.
Five days on the ground is the sweet spot for a structured due-diligence trip. Too short and you run out of meeting slots, too long and the marginal value of the extra day drops sharply. The pattern that works for nearly every Aussie investor we have briefed: one arrival and orientation day, two days of legal and financial DD, one JV partner working day, one site or property inspection day, and the flight out on the morning of day six. Total time in country is comfortably inside the 30-day Business eVisa stay with three weeks to spare if the trip extends.
The pattern flexes around the specifics. A real-estate DD trip lengthens the site-inspection day to two days. A fintech minority-stake DD shortens the JV partner session because the founder is the only commercial counterparty. An agribusiness offtake structure extends the site visit to three days for harvest-season verification. The Business eVisa's 30-day stay is comfortably long enough for almost any structured DD trip. If the trip runs over 30 days (a heavy real-estate or industrial DD that spans the rainy season inspection cycle), the in-country extension flow is available — our Cambodia Business visa extensions guide for Australians covers the mechanics.
For ninety-five percent of Aussie investor DD trips, the airport question answers itself: KTI (Techo International) in Phnom Penh is the entry point. Almost every Cambodian law firm, accounting practice, regulatory advisor, JV partner counterparty, and corporate target sits in the capital — and even the target assets in the provinces are usually scoped from a Phnom Penh base, with a single day-trip out to the site. KTI replaced Pochentong (PNH) on 9 September 2025 as the single Phnom Penh gateway, and it now handles every Singapore, Bangkok, and Kuala Lumpur connection that Aussie investors use.
SAI (Siem Reap) only enters the conversation if the target asset itself sits in Siem Reap province — typically a hospitality investment (boutique hotel, resort, F&B operator) or a tourism-adjacent business. The lawyers and accountants are still in Phnom Penh, so a Siem Reap-only DD trip is rare; the realistic pattern is a hybrid (fly into KTI, three or four days in Phnom Penh, domestic transfer to SAI for the site inspection day, fly home from SAI). The Cambodia Angkor Air and PMT Air domestic hop is 50 minutes airborne, $80-130 USD (~$122-198 AUD), and both run multiple daily departures.
Sihanoukville (KOS) is the third option, relevant only for coastal investment DD — usually real estate or industrial SEZ-adjacent targets along the Gulf of Thailand coast. The KOS-related DD pattern looks like the Siem Reap version: fly into KTI, do the Phnom Penh legal and financial work, then a Cambodia Angkor Air hop or a four-hour road transfer to the coast for the site inspection day. Our Cambodia airports KTI, SAI, and KOS guide for Australians runs the full comparison, the KTI airport guide for Phnom Penh covers the new terminal in detail, and the SAI airport guide for Siem Reap is the parallel reference.
Next steps and related reading for Australians: apply for your Cambodia eVisa when you are ready to lodge, bookmark our Cambodia visa hub for Australian citizens as the single canonical reference, skim the FAQ on Cambodia visa business visa for quick answers, and use our glossary of Cambodia visa terms to decode any acronym in this guide.
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