The short answer is no: a Cambodia Tourist eVisa cannot be converted to a Business eVisa once you are in the country. The class is locked at application. Here is exactly why, the only real fix if you guessed wrong, and how to pick the right class before you fly.

No. Cambodia does not allow you to convert a Tourist eVisa (Type-T) into a Business eVisa (Type-E) once you are inside the country. The visa class is fixed at the moment you apply, and the eVisa system has no in-country switch path for US citizens. The Tourist eVisa caps at a single 30-day stay with no extension, so if you entered on it and now need business activities or a longer stay, your only clean option is to leave Cambodia and re-enter on a fresh Business eVisa ($90 USD all-in, approved in 3–5 days). The far cheaper move is to choose the correct class before you fly — if there is any chance your trip involves work, meetings, or more than 30 days, apply for the Business eVisa from the start.
This is one of the most common questions we get from American travelers who are already on the ground in Cambodia: "I came in on a Tourist eVisa, but now I need to do some business or stay longer — can I just upgrade it to a Business visa from here?" The honest answer is no. There is no in-country conversion from a Tourist eVisa to a Business eVisa for US citizens. The class you applied for is the class you have, full stop.
It is worth being clear about this because the wording "convert" or "upgrade" suggests a counter you can walk up to, a form you can file, or an agent who can quietly switch the category in the system. None of those exist for the eVisa. Cambodia treats the Tourist (Type-T) and Business (Type-E) as two separate visas applied for separately, not as two tiers of one product you can move between after entry. Understanding why saves you from chasing a fix that is not there.
The reason comes down to how Cambodia structures the eVisa itself. When you apply online, you select a visa class at the very start — Tourist (Type-T) or Business (Type-E) — and everything downstream is built around that choice: the price, the stay rules, the entry conditions, and whether the visa can ever be extended. The class is not a setting on a generic visa. It is the visa. There is no shared record that an officer or an agent can re-tag from T to E after the fact.
Once your eVisa is approved and you have used it to enter Cambodia, the entry is logged against that specific class. The Tourist entry is a single-entry, 30-day, non-extendable stamp. The system does not carry a mechanism to retroactively reclassify a Tourist entry as a Business one. This is different from countries that issue a generic entry and let you apply for a "change of status" in-country — Cambodia's eVisa simply does not work that way for US travelers.
A lot of the confusion comes from the in-country extension, which does exist — but only for the Business eVisa. People hear "you can extend your visa in Cambodia" and assume that means any visa can be stretched or upgraded. It does not. The extension is a feature of the Type-E class only, arranged through a Cambodian immigration agent after you arrive. A Tourist eVisa has nothing to extend and nothing to convert. The extension door is open only if you walked in through the Business entrance to begin with.

For US citizens who entered on a Tourist eVisa, the 30-day clock is hard. It starts on the day you arrive in Cambodia, runs for 30 calendar days, and then it is done. There is no grace tier, no automatic rollover, and — since November 2025 — no auto-extension. The tourist auto-extension that some older guides still mention ended that month, so anything you read online suggesting you can quietly add 30 days at an immigration office is out of date.
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Se sua viagem ao Camboja passar de 30 dias, o visto com que você entra decide tudo. O eVisa de Turista (Tipo T) tem um limite rígido de 30 dias sem possibilidade de extensão. O eVisa de Negócios (Tipo E) é a única categoria que você pode estender no país — 1, 3, 6 ou 12 meses. Veja como os americanos escolhem corretamente antes de viajar.
Três coisas passam pelo balcão da Imigração do Camboja: seu passaporte americano, seu eVisa e seu código QR do e-Arrival. Aqui está exatamente o que o oficial quer ver, em que ordem, e as pequenas discrepâncias que transformam um carimbo de 30 segundos em um desvio para a mesa ao lado no KTI.
Com todas as fronteiras terrestres Tailândia-Camboja ainda fechadas, Bavet é agora a principal via terrestre para o Camboja a partir do Vietnã. Seis horas de Ho Chi Minh City, um eVisa impresso, nenhum Cartão e-Arrival — aqui está como cidadãos americanos realmente fazem isso em 2026.
So what happens if you are sitting in Phnom Penh on day 25 of a Tourist eVisa and realize you need another month, or that a client has asked you into a meeting? You have two real choices and one bad one. The bad one is overstaying — and the Cambodian overstay penalty is $10 USD per day from day one, payable in cash at the airport on exit, with longer overstays risking complications for future visa applications. That is not a route we recommend to anyone.
The two real choices are: leave Cambodia before day 30 and re-enter on a fresh Business eVisa, or simply leave on time and not stretch the trip. There is no third door labeled "convert in place." A Tourist eVisa that hits 30 days has done its full job, and the only way to keep going legally is a new visa under the correct class.

If you are already inside Cambodia on a Tourist eVisa and you now genuinely need the Business class — an unexpected meeting came up, a freelance gig materialized, or your stay needs to run well past 30 days — the cleanest and only reliable fix is the visa run. You exit Cambodia to a neighboring country, apply for a fresh Business eVisa, and re-enter on it. Because the Business eVisa is processed online in 3–5 days, you can lodge it before you even leave, then time your re-entry once the approval PDF lands in your inbox.
The Business eVisa itself is straightforward: $90 USD all-in, approved in 3–5 days, delivered as a printable PDF by email. The document pack is the same five items as the Tourist eVisa — US passport with 6+ months validity, a passport-style photo, a bio-page scan, an email address, and a payment method — and, unusually for a regional business visa, no sponsor letter, employment contract, or company invitation is required. If Immigration flags a correction on the application, resubmission is free. Once it is approved, you re-enter Cambodia on the Type-E class and, from there, you can lodge in-country extensions of 1, 3, 6, or 12 months.

A big share of the people asking about conversion have not actually flown yet. They applied for a Tourist eVisa, then realized — sometimes within the hour — that their trip really calls for the Business class. If that is you, the good news is that you are not in a conversion situation at all. You simply apply for the correct class. There is no "switch" to perform on an application you have not used to enter the country.
The practical question is what to do with the Tourist eVisa you already started or paid for. If the application is still in progress or was flagged for a correction, the cleanest path is to file the correct class — the Business eVisa — and let the wrong one lapse. If Immigration flags any application for a correction, resubmission is free, so you are never trapped paying twice for a single mistake in the form. The all-in price you pay is for getting an approved visa in the correct class, delivered as a printable PDF by email.
The mental model to carry: conversion is an in-country idea, and it does not exist here. Before travel, you are not converting anything — you are choosing. After travel, you are not converting either — you are re-entering on a fresh visa. There is no middle path where an existing Tourist record becomes a Business one.

The entire conversion problem disappears if you pick the correct class before you fly. The decision is simpler than most Americans assume, and the cost of choosing the Business eVisa "just in case" is only $10 USD over the Tourist — far less than a single visa-run flight. Here is the working test we apply when a US traveler asks which one fits.
The trap to avoid is the "vacation that quietly includes a couple of meetings" trip. A New York consultant who flies in for a week of beaches but spends two afternoons in client meetings is, in Cambodian Immigration's eyes, on a business trip. The Tourist eVisa technically does not cover it, and there is no way to retroactively fix that once you have entered. If your trip is even partly business, the Business eVisa is the clean call from the start.