Cambodia visa on arrival is cash-only USD — no card terminal at the booth, no friendly ATM beside it. Here's the honest Aussie guide to sourcing $40–$50 USD in clean small notes before you board, and what the AUD-to-USD spread actually costs in 2026.

Cambodia visa on arrival is cash-only USD at all three airports (KTI, SAI, KOS) because the booth has no card terminal and no ATM directly beside it. Australian dollars are never accepted, and the airport ATM after Immigration dispenses Khmer riel rather than USD. The safest plan for Aussies is to bring $40–$50 USD in clean small notes ($5, $10 and $20 denominations, post-2006, no tears or ink marks) sourced before flying. A pre-ordered bank cash collection from ANZ, CBA, Westpac or NAB sits at roughly 2.5–3.5% over the spot AUD/USD rate in 2026. Travelex and airport currency counters run 5–7% over. With AUD/USD trading around 1.52–1.55 through 2026, a $40 USD VoA budget costs around $61–$65 AUD. The eVisa at $80 USD (~$122 AUD) all-in sidesteps the USD-cash problem entirely.
Every airport in Cambodia bills in US dollars at the visa-on-arrival booth, and every Aussie who turns up without cash discovers the rule the hard way. The booth itself is unforgiving — no card terminal, no contactless, no AUD, no Khmer riel. The ATMs on the Cambodian side of Immigration are designed to dispense Khmer riel for taxis and dinner, not USD for visa fees. The cash-USD trap is the single most common reason Australian travellers end up annoyed at the VoA queue.
The fix is genuinely simple if you sort it in Australia before you board: walk into your bank or a Travelex branch a week out, ask for $40 USD in $5, $10 and $20 notes, and put them in a clean envelope inside your carry-on. The catch is that nobody tells you this until you are already at the airport in Phnom Penh wondering why the friendly ATM beside you is spitting riel. This guide walks through where to source clean small USD in Australia, what the AUD-to-USD margin actually costs in 2026, and why the on-arrival ATM is not the fix some Aussies assume it is.
If you are still weighing visa on arrival against the eVisa, the airport-by-airport reliability guide and the head-to-head comparison cover that decision in more depth. If you have already chosen VoA, this guide is the cash-prep walkthrough that should sit beside your passport. For the umbrella view across cost, processing time, and documents, see the Cambodia visa for Australians hub.
The Cambodian VoA booth has run on US dollars for over twenty years. The country itself uses USD alongside the Khmer riel for almost every higher-value transaction, and Immigration has standardised on USD because it keeps the booth process consistent across all three airports and both land borders. What changes in 2026 is the stricter enforcement of note quality. The officer at the booth is now expected to refuse any note with visible damage, ink, fold creases through the serial number, or tears at the edge — and Aussies in 2026 are being sent back to the ATM more often than they used to.
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A $20 USD note with a small ink dot near the corner has been refused at the SAI booth in our most recent visit. Cambodian Immigration officers are following a stricter note-quality rubric in 2026 than they were even two years ago, and the booth supervisor will side with the officer if you push back. The booth does not give USD change either — only Khmer riel — so handing over a $50 for the $30 fee leaves you with around 80,000 riel (~$20 USD) that you did not plan for. Bringing $5, $10 and $20 notes in a clean envelope is the cleanest way to avoid both issues.
The ATM-after-Immigration trap
The ATMs inside the arrivals hall — past the VoA booth — are stocked for taxi fares and lunch, not visa fees. Most dispense Khmer riel in 50,000 and 100,000 notes. A handful of machines at KTI dispense USD in $20 or $100 increments, but they are not located beside the VoA booth and they charge a $5 USD per-withdrawal fee on top of your home-bank fee. Even if you find one, you queue, withdraw, walk back, and rejoin the VoA queue from the end. Bringing cash from Australia is faster, cheaper, and avoids the round trip.
Sourcing $40–$50 USD in Australia is a five-minute job if you start a week before flying. The trick is to pre-order through your home bank rather than walking up to a counter on the day. Pre-orders use the bank's wholesale AUD/USD rate, while walk-up counters and airport kiosks layer a retail margin on top. The difference is real money on a $40 USD purchase — you pay roughly $61 AUD with a pre-order and $66–$68 AUD with an airport walk-up.
Travelex branches in CBDs and shopping centres typically charge 4-5% over spot. Travelex airport counters at Sydney, Melbourne, Brisbane and Perth charge 5-7% over spot — sometimes more during peak holiday weeks. The 'no commission' sign at the airport kiosk is technically true and operationally meaningless; the margin is built into the buy rate, not added as a separate fee. A $40 USD purchase at an airport Travelex in 2026 costs around $66-$68 AUD. The same purchase pre-ordered through CBA a week earlier costs around $61 AUD.
For a deeper read on the AUD-to-USD margin and how it shows up across the whole Cambodia trip — not just the VoA — the dedicated AUD conversion guide covers card statements, dynamic-currency-conversion traps, and what Aussies actually pay across a 14-day itinerary.
The Australian dollar has traded in a 1.52-1.55 band against the US dollar through the first half of 2026, with the mid-point around 1.535. That means each $1 USD costs roughly $1.53-$1.55 AUD before any retail margin. For a $40 USD VoA budget — enough for the $30 (~$46 AUD) fee plus a buffer — the table below shows what you actually pay across the common sourcing channels.
The honest takeaway: the difference between the best and worst USD-cash channels is around $5-7 AUD on a $40 purchase. That is not enormous in isolation, but it is the gap between a relaxed pre-flight stop at your branch and a rushed airport-kiosk queue with a worse rate. The bigger story is the 30-60 minute VoA queue on arrival — which the eVisa skips entirely — rather than the FX margin itself.
How much USD to actually bring
Bring $40-50 USD even though the fee is $30 (~$46 AUD). The extra covers a missing-photo backup ($2 USD), a possible unofficial express-line tip ($5 USD at KTI peak), and an arrival-side taxi if you end up paying in USD rather than card. Anything left over is useful for hotel deposits and tuk-tuk drivers in Phnom Penh and Siem Reap, where USD circulates alongside Khmer riel.
The Cambodia eVisa is billed in AUD at checkout — Visa, Mastercard, Apple Pay, Google Pay and PayPal all work — at a fixed $80 USD (~$122 AUD) all-in. No USD-cash sourcing, no airport ATM round trip, no note-quality refusals. Approved in 3 business days, delivered as a printable PDF by email, and walking straight to the e-gate lane at KTI, SAI and KOS on arrival.
The headline price gap — $30 (~$46 AUD) versus $80 (~$122 AUD) — is real, but the operational gap closes faster than most Aussies expect. Pre-ordering USD costs roughly $63-64 AUD at a bank, the booth queue adds 30-60 minutes after a long flight, and the on-arrival photo and unofficial-tip layers add a further $5-10 USD on a bad day. The eVisa is also checked end-to-end before it reaches Immigration, which means a free resubmission if any field needs a correction rather than a queue reset at the booth.
If you are landing within 72 hours and the eVisa window is too tight, the cash-USD prep above is the right call. Otherwise the eVisa application is a faster route once the FX, queue, and photo costs are added up honestly. The Australian application walkthrough covers every field on the eVisa form, and the broader country guide covers eligibility.
Run this checklist a week before flying and the VoA booth becomes a non-issue. None of the steps takes more than ten minutes, and the worst case is one walk-in trip to your bank branch.
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 cost for quick answers, and use our glossary of Cambodia visa terms to decode any acronym in this guide.
Fly via KTI/SAI/KOS rather than overland from Bangkok.
Read the 2026 update →USD cash still needed at Bavet VoA if you go that route.
See the combo guide →The quietest USD-cash VoA route into Cambodia.
Plan the Laos route →Where most Aussies stop on the way through.
Sort the stopover →Bali or Cambodia for your next trip — or both?
Compare the two →