Simply put, fixed costs are mandatory expenses required for a trip to run smoothly, regardless of whether you are traveling solo or in a group, in bright sunshine or unexpected rain. These include indispensable items such as entrance tickets, transfer vehicles, tour guides, or pre-arranged meals.
You can think of it as the "backbone" of the trip—though not overtly visible, it is what holds the entire journey firm, complete, and coherent. Because these costs are carefully calculated from the start, travelers won't have to worry about random extra expenses popping up along the way.
An easy-to-understand real-life example is the Phong Nha Cave – Chay River – Dark Cave tour organized by Sovaba Travel. The tour price includes all essentials: entrance ticket to Phong Nha Cave, boat ticket on the Son River, zipline ticket at Chay River, kayaking inside Dark Cave, a lunch rich in Quang Binh flavors, and door-to-door transfer from Dong Hoi. Everything is clearly defined so that all you need to do is pack your backpack, enjoy the scenery, and leave your worries behind.


