Manaslu Trek is a bit more expensive than its corresponding Annapurna Trek and other treks due to the reason that it falls under a restricted area. Since the Manaslu Circuit trek falls under the Manaslu Conservation Plan the following permits are required: Restricted Area Permit (RAP) Manaslu Conservation Area Project(MCAP) Annapurna Conservation Area Project(ACAP) You can acquire the permits through your travel agent or in the tourism office in Kathmandu. Note that the TIMS permit is not required for this trek.