Your Nepal online arrival form, filed by Num.
Fill this in once. A NUM person files it on nepaliport.immigration.gov.np for you, on the first day the site allows (15 days before you arrive).
NUM’s fee$4.99per traveller
Nepal government feeFree (visa paid on arrival)Free, per traveller
NUM is not the Nepal government. You can apply yourself on the official site for free.
Official site. NUM charges $4.99 for the time, and the decision is the government’s alone: nobody can promise approval or speed it up. The online form only; the visa itself (US$30/50/125) is paid at the counter on arrival. Valid 15 days, so Num files it just before you fly.
Decision: Instant. Valid: 15 days.