Recently, the property came to charge, saying that if the payment is not made within the specified time, a late fee of 3% will be charged every day. Is this legal?

Mainly depends on the terms in the property service contract, if any, whether it is legal. However, when the overdue fine exceeds the principal, it can only be charged according to the amount of the principal, that is, the property fee 1 000 yuan, and the overdue fine is at most 1 000 yuan. General property companies charge three thousandths a day, which is a bit high.