As Of vs. As At vs. From
“As at” usually presents a snapshot at a particular date or time, while “from” marks a starting point. “As of” can identify a date and, in business usage, may also carry an effective-from sense, so context matters.
Use “as at” for a dated snapshot, “from” for a clear starting point, and read “as of” from context because it can function in more than one time-reference sense.
Key details
Further guidance
Core difference
“As at” is suited to a status snapshot at a particular date or time; “from” directly marks the beginning of a period; “as of” can refer to a date and can also mean effective from that date in business contexts.
Usage Boundary
Do not mechanically replace every “as of” with “as at” or “from”; identify whether the sentence describes status at a date or an effective starting point.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- as — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Business-English distinctions among “as at”, “as of”, and time-from uses