If I feel I need an extra day on the mountain, can I add it there? And do I get money back if I come down early?
Can I change the length of my Kilimanjaro climb once I am on the mountain?
You can come down early but you cannot stay longer. Kilimanjaro operators pay the park fees for the exact number of days before the climb starts, take food and crew for that length, and often have the guides and porters booked on another climb straight afterwards.
The full answer, kept up to date: Can I decide on the mountain to stay longer?