Aussie consultants flying to Cambodia 4-8 times a year on short engagements: five single-entry Business eVisas costs $450 USD (~$686 AUD); one 12-month multi-entry costs roughly $200 USD (~$305 AUD). Plus four fewer applications. Here's when the maths makes it obvious.

At four trips a year and above, comfortably. At five trips a year, the maths is brutal — five single-entry Business eVisas at $90 USD each is $450 USD (~$686 AUD), versus the 12-month multi-entry Business eVisa at roughly $200 USD (~$305 AUD) all-in. That's a $250 USD (~$381 AUD) saving on cost alone, plus the time saving of four fewer applications and four fewer 3-business-day waits. Below four trips a year, the maths gets closer: at three trips it's $270 USD (~$411 AUD) in single-entry fees versus $200 USD multi-entry — multi-entry still wins, but more narrowly. At two trips, $180 USD (~$274 AUD) in single-entry fees beats multi-entry. The pivot point is honestly four trips a year for Aussie consultants on short engagements, with each individual stay under 30 days.
The single biggest cohort asking the multi-entry-vs-single-entry question on our desk is Aussie management consultants on regional engagements. Sydney consultant on a Phnom Penh client every six weeks. Melbourne PwC alum running a Cambodia practice from a Singapore base, flying in monthly. Brisbane independent on a Cambodia government advisory project, in and out across an eight-month engagement. The shape of the year is the same — four to eight short Cambodia trips, each two to ten working days — and the question is the same: do I buy a fresh Business eVisa each time, or do I take the multi-entry option once and forget about it for a year?
The answer is almost always the multi-entry option, and the maths shows why. But it's worth walking through the numbers honestly because the break-even isn't trivial, and there are at least two ways to get the decision wrong — over-buying the multi-entry stack when your cadence is two or three trips, and under-buying when your cadence is genuinely four-plus.
Three numbers anchor the maths. Single-entry Business eVisa is $90 USD (~$137 AUD) per trip, approved in 3 business days, delivered as a printable PDF by email. Multi-entry 12-month Business eVisa is roughly $200 USD (~$305 AUD) all-in — same 3 business day processing, same PDF delivery, same email flow. Both products live on the same Cambodia eVisa application; multi-entry is selected at checkout. From those three numbers, the trip-count arithmetic falls out cleanly.
The pattern is straightforward: multi-entry wins from three trips a year onward, and the margin scales linearly with each additional trip. At five trips — the median consultant cadence — multi-entry saves $250 USD (~$381 AUD). At eight trips, it's $520 USD (~$793 AUD). At any cadence below three trips, single-entry is either cheaper or close enough that the simpler product is the right call.
At exactly three trips, the multi-entry saves about $70 USD (~$107 AUD) on cost. That's a meaningful win but not a runaway one — and there are scenarios where you'd take the slightly more expensive single-entry route anyway. The single-entry route gives you a fresh visa product each trip, which means a longer total validity window across the year if the trips are spaced wide. The multi-entry route locks you to its 12-month validity window — so if the third trip slips to month 14 instead of month 11, the multi-entry visa is dead and you're paying again. The honest call at three trips is: take multi-entry if your trips are clustered into a 6-9 month window; take single-entry if they're spread out across the calendar with the last one near the end of the year.
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Cost is the cleaner side of the calculation. The dirtier and arguably more important side is application time. Every fresh Cambodia eVisa application takes about an hour for an Aussie traveller on a clean second-or-third application — passport bio-scan, photo upload, eight or so form fields, payment. Plus the 3-business-day processing wait, plus the PDF print and pre-flight check. Across five single-entry applications in a year, that's roughly 5-7 hours of focused admin time, four extra 3-business-day waits to plan flights around, and four extra opportunities to mis-enter a passport number or upload a slightly-wrong photo and have the application bounce back.
The multi-entry option collapses all of that into one application. One hour of form-filling. One 3-business-day wait. One printable PDF that works for the entire 12-month window. For a consultant whose hourly bill-out rate is comfortably north of $200, the application-time saving alone is worth more than the cost saving — and the operational reduction in risk (one less point where Immigration might flag a resubmission) is the icing on top.

The multi-entry visa caps each individual stay at 30 days. For most Aussie consultants on short engagements, that's a non-issue — the typical consultant Cambodia trip runs 2-10 working days, well inside the 30-day window. But it's worth walking through the calendar arithmetic so you can pressure-test against your own engagement.
Scenario A — Sydney consultant on monthly Phnom Penh trips, each 4-5 working days plus a weekend. Eight trips a year, each roughly 6-7 days inside Cambodia. The 30-day cap is never anywhere near the engagement shape — biggest single stay is a comfortable 7 days, well under the limit. Multi-entry is the clean answer.
Scenario B — Melbourne consultant on quarterly two-week trips. Four trips a year, each roughly 14 days inside Cambodia. Still well inside the 30-day cap. Multi-entry is the clean answer.
Scenario C — Brisbane consultant on a six-week onsite block followed by quarterly two-week visits. The opening six-week block is the problem — that's 42 days, well over the 30-day cap. Multi-entry will not cover the opening block on its own. The right structure is to enter the country on a single-entry Business eVisa, extend in-country through an immigration agent to cover the back end of the six-week block, and then use multi-entry from trip two onward. Or alternatively, fly out at day 28 of the opening block for a weekend in Bangkok, then fly back in on a fresh multi-entry-eligible stay. The choice depends on client schedule pressure.
The 30-day cap reset
The 30-day stay clock resets every time you exit Cambodia. Spend 28 days inside on trip one, exit to Singapore for a weekend client meeting, fly back in and the clock starts fresh at day one of a new 30-day allowance. There's no minimum time you have to spend outside before re-entering — the reset is immediate on exit-and-return.

Three consultant-shape patterns where multi-entry is the wrong call, even at the four-plus trips threshold.
Pattern one — one big project, one long stay. If your year holds one Cambodia engagement of 8-12 weeks and nothing else, multi-entry doesn't help. The 30-day stay cap means you'd need to leave and re-enter the country twice during the engagement, which is operationally annoying for a project that doesn't naturally need international travel. The right product here is a single-entry Business eVisa plus an in-country extension — one entry, one continuous stay covering the full engagement.
Pattern two — trips clustered into a tight three-month window. If you're doing six Cambodia trips but they're all clustered into March, April, and May for one specific project, then your year-long multi-entry visa is sitting unused for nine months. Multi-entry still wins on cost — $200 USD (~$305 AUD) versus $540 USD (~$823 AUD) for six single-entry visas. But the visa is structurally over-engineered for the year's actual shape. Some Aussies in this pattern feel the 12-month validity is overkill and prefer the per-trip pattern. The maths still favours multi-entry; the psychology sometimes doesn't.

Bangkok stopover between Phnom Penh trips on the multi-entry cycle.
Read the 2026 update →Common second-country stop for regional consultants.
See the combo guide →Tropaeng Kreal crossing reliable for the overland leg.
Plan the Laos route →Hub city most Aussie consultants base out of regionally.
Sort the stopover →Less common on consultant cycles, common on the leisure leg.
Compare the two →