at hand—(also: on hand) within easy reach; close by:
- Keep a good dictionary at hand as you write. Proofread carefully.
in hand—
1. said of smth. being dealt with:
- If you apply yourself to the job in hand, you’ll soon finish it.
2. (also: on hand) in one’s possession:
- Sometimes it is a better idea to borrow money than to wait until you have the money in hand.