Three Cambodia trips in twelve months. You're already $160 USD (~$244 AUD) deep on Tourist eVisas, about to apply for a third, and starting to wonder if there's a smarter way. There is — here's the maths.

Switch to Business at trip three if a fourth trip looks likely before the 12-month mark. Three single-entry Tourist eVisas at $80 USD each is $240 USD (~$366 AUD); a Business eVisa at $90 USD (~$137 AUD) plus an in-country multi-entry extension brings the annual total to roughly $300-340 USD (~$457-518 AUD), but that single stack covers every re-entry for the next six to twelve months without another application. You also collapse three separate 3-business-day approval cycles into one. If trip three is genuinely the last trip of the year and you'll stay under 30 days, finishing on Tourist is fine — but plan honestly. Most Aussies who do three Cambodia trips in a year end up doing a fourth.
You bought a Tourist eVisa back in January for a Siem Reap family trip, another one in April for a quick Phnom Penh run, and now it's June and you're staring at the application form for a third. The first two cost you $160 USD (~$244 AUD) combined. The third will push you to $240 USD (~$366 AUD). That number, on its own, isn't huge — but it's the inflection point where the maths starts pointing somewhere else, and most Aussies don't notice until they're already filing a fourth.
This piece is for Aussies on trip three or trip four in a rolling 12-month window. It's not a frequent-traveller manifesto; it's a single, narrow decision. Do you keep buying Tourist eVisas one at a time, or do you switch tracks to Business now and stop touching the form for the rest of the year? The honest answer depends on three numbers: how many more trips you'll realistically make before December, whether any single trip might exceed 30 days, and how much your time is worth filing eVisa forms.
Here's the comparison most Aussies on trip three are running in their head, only properly written out. Two scenarios. Same traveller, same year, same trip count — different visa stack. The numbers below assume four total trips for the year (which is the planning horizon most three-trip Aussies actually land on by year-end).
Read this table the way an Aussie three-trip traveller reads it. Three Tourist eVisas at $240 USD (~$366 AUD) is already eating most of the way into a Business + 6-month extension stack at $300-340 USD (~$457-518 AUD). The gap is $60-100 USD (~$91-152 AUD). If you're going to make even one more trip before the 12 months are up — and the 6-month extension window covers it — Option B wins on cost. If you make two more trips, it's not a contest.

Money is the obvious axis; time is the one Aussies on trip three quietly underestimate. Each Tourist eVisa application is a fresh form, a fresh payment, a fresh 3-business-day waiting cycle, and a fresh moment of remembering to print the PDF before you fly. Three of those is three separate weeks of low-grade admin spread across the year. By contrast, one Business eVisa plus a single in-country extension visit is one upfront cycle and then nothing for six or twelve months.
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Run the numbers honestly. A Tourist eVisa form takes around 15-20 minutes from start to submit if you have your passport scan and photo ready. Add another 10-15 minutes the day before each flight to print the PDF, check the details, and stash it in the booking folder. Across three trips that's roughly 75-105 minutes of pure admin, spread as small interruptions across the year. Across four trips it's closer to two hours. The Business + extension stack is a single 20-minute form upfront, plus one half-hour visit to an immigration agent in Phnom Penh or Siem Reap once you arrive on trip one. After that, nothing — you walk up to Immigration on each re-entry, the multi-entry stamp does the talking.

Cost and time aside, there are three trip-shape factors that turn the trip-three decision from 'lean Business' into 'obviously Business' for Aussies. If any one of these is true of your year, stop reading and switch tracks now.
Since November 2025, the Tourist eVisa cannot be extended in-country, full stop. The auto-extension that used to apply at airports has ended. If trip three, trip four, or trip five could plausibly land at 35, 45, or 60 days because work or family pulls you into a longer stay, the Tourist eVisa is structurally wrong for that trip and you're forced onto Business anyway. Do it now and the question is settled for the year.
Tourist eVisas are single-entry. If you fly out of Cambodia to Bangkok or Singapore for a meeting and want to fly back in a week later, you need a fresh Tourist eVisa for the re-entry — another $80 USD (~$122 AUD) and another 3-business-day cycle. Aussies who do regional hopping during a longer stretch in Cambodia routinely get caught by this. Business with multi-entry collapses it to a single walk-up at Immigration.

The mechanics of switching are simpler than most Aussies expect. There's no special transfer flow, no record you need to update with MFAIC, no concession to lose by abandoning the Tourist class mid-year. You just lodge the next application as a Business eVisa and the system processes it like any other Business application. The two prior Tourist eVisas you used are closed entries on Cambodia's side — they don't compound, don't carry over, and don't generate friction at Immigration when you arrive on the Business eVisa.
The application itself is the standard Cambodia Business eVisa form, $90 USD (~$137 AUD) all-in, approved in 3 business days, delivered as a printable PDF by email. The only meaningful difference from your prior Tourist applications is the visa-type selector at the top of the form. Once you arrive in Cambodia on this Business eVisa, you have two paths. Path one: this is a normal-length trip under 30 days, you skip the in-country extension entirely, and you upgrade to multi-entry only when you have a clear sense of how many more trips are coming. Path two: you know you'll be coming back, so you visit a vetted immigration agent in Phnom Penh or Siem Reap during the first trip and lodge the 6-month or 12-month multi-entry extension upfront.
The honest sequencing — Business on trip three, multi-entry decision on trip three or four
You do not have to commit to a multi-entry extension the same day you switch visa class. Switch to Business on trip three first, see how the next trip lines up in your calendar, and lodge the multi-entry extension at the start of trip three or trip four — whichever is the one where you have visibility on the back half of the year. Approved in 3 business days for the eVisa; 7-14 business days for the in-country extension.

There is a clean case for finishing the year on the third Tourist eVisa rather than switching, and a small number of Aussies on the desk land in it honestly. The shape is specific: you have done two short trips already this year, trip three is a known endpoint (a family event, a final loop, a planned-final visit), no trip on the horizon exceeds 30 days, no trip is work-related, and you have realistic confidence that you will not return to Cambodia inside the next six months.
If all five of those are true, three Tourist eVisas at $240 USD (~$366 AUD) total is the cheaper and simpler outcome, full stop. You don't need the multi-entry premium, you don't need the in-country extension visit, you don't need a Business class you won't use. Buy the third Tourist eVisa, print the PDF, fly out, file the year. Where this gets you in trouble is if any of those five conditions are aspirational rather than real. Most three-trip Aussie travellers come back for a fourth — work pivots, family lands, a cheap flight pops up — and the trip-four moment is when the Tourist-only strategy starts costing money rather than saving it.
Bangkok-Phnom Penh hops are the most common Aussie regional pairing.
Read the 2026 update →Ho Chi Minh-Phnom Penh is a clean regional re-entry route.
See the combo guide →Loop through Laos between two Cambodia trips if you have time.
Plan the Laos route →Where most three-trip Aussies stop on the way through.
Sort the stopover →Bali run between Cambodia trips is common for Aussies.
Compare the two →