The upper Mustang permit fee varies from permit to permit. And, the permit cost may also vary depending on the season and the duration of the trek. 1. Restricted Area Permit The Restricted Area Permit costs around $500 for the first 10 days and an additional $50 for each extra day. 2. Annapurna Conservation Area Permit Annapurna Conservation Area Permit costs around NPR 3000 (Around $25). 3. Trekkers’ Information Management System (TIMS) card The Trekkers’ Information Management System (TIMS) card costs $10 for group trekkers and $20 for individual trekkers.