The exit fee for those 12 and over leaving Belize by land to either Guatemala or Mexico is now US$15 plus the conservation fee ($3.75). It was US$10 for a couple of years but just went up a few weeks ago.
The security fee is 75 U.S. cents when transferring from international to domestic flights and US$1.25 when leaving by air. So the total departure fee is US$20 (US$15 + 3.75 +1.25). This is about the same as exit fees from most other Central American countries. Costa Rica's is a little higher.
--Lan Sluder
AmbergrisCaye.com 
