money on hand; cash at hand
Refers to the money one currently has with them, as opposed to total assets or bank savings.
I didn't have enough money on me, so I couldn't buy it.
When traveling, I make sure to split up the cash I carry.
Compound of 持ち (mochi, 'holding') + 金 (kane, 'money'), with rendaku voicing of かね to がね.