No, there will be no penalties. The main thing is that the visa is not overdue.

One-time tourist visa UAE operates 59 days from the date of issue and entitles to stay in the country for no more than 30 days .

The visa specifies the date of issue (DATE AND PLACE OF ISSUE) and the end date (VALID UNTILL). If departure from the UAE will be later than the date of the visa termination, there will be fines and problems with subsequent visa reception.

More information can be found on the page "Visa to the UAE."