DEFINITIONS1. as soon as someone is able to do something. Please call me back at your earliest convenience. Synonyms and related words. Soon and as soon as possible.

Is at your earliest convenience rude?

The phrase “at my earliest convenience” isn't inherently impolite. It is, however, somewhat ambiguous, and may be used politely, indifferently, or rudely.

What can I say instead of earliest convenience?

A better option would be “. . . at your earliest convenience, or no later than [date].” It sounds jargony. One of the reasons many people dislike “at your earliest convenience” is that it sounds like business jargon—something we all love to hate. Use plain language instead.