Hi Rohan! When entering Cambodge at the Prek Chak Checkpoint, you can get a visa on arrival for $35, plus $2 if you don’t have a picture for the visa. To be honest, it’s unclear whether this is the “official” price because many travellers claim that there are a lot of extra fees for this border crossing. But this is the visa price you’ll get from every immigration officer.

When travelling in the opposite direction from Cambodge à Vietnam — if you’re not from a visa-exempted country — then you’ll need an e-visa à cross the Prek Chak Border. You have à apply for this at least 3 days in advance à avoid any hassle on the day of your trip. Hope this helps. Safe travels!