Definition
An air traffic control phrase used in a clearance to advise a pilot of the altitude they can expect to be cleared to at a specified time or upon reaching a specified fix. It is an advisory of an anticipated future clearance, not an authorization to climb or descend to that altitude at the stated time or fix. The pilot must maintain the last assigned altitude until ATC issues the new altitude clearance, except in the event of lost communications, in which case the expected altitude is used as part of the lost-comm altitude procedure.
Plain English
ATC is telling you ahead of time what altitude they plan to give you, and roughly when or where they plan to give it. You do not change altitude yet. You wait for the actual clearance, unless you lose radio contact.
Context Anchor
Common in IFR clearances, departure instructions, and route changes when ATC wants the pilot to know what altitude to expect next.
Derivation
“Fix” comes from an older meaning of “fixed,” meaning set or established. In aviation, a fix is a known point in the air or on a route, not something being repaired.
Why Pilots Care
Supports safe and efficient vertical planning without assuming immediate clearance authority.
Intuition Check
“Expect” does not mean “cleared.” “Fix” does not mean “repair”; it means a named navigation point.
Example Sentence 1
After departure, the controller said, 'Climb and maintain 6,000, expect 10,000 in ten minutes,' so the pilot leveled at 6,000 and waited for the next clearance.
Example Sentence 2
We were told to expect 8000 feet at 15 minutes past the hour during the descent.