Actually I have visit visa of dubai for 3 months...

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As soon as your residence visa expires in UAE, the sponsor has to make it quick to the renewal of residence his / her sponsored / employees within the time-limit for renewing visas, so that to avoid any imposed fines or legal consequences.
According to the law, the general directorate of residence and foreign affairs (GDRFA) grants a 30-day as a grace period to stay legally in the UAE after the expiry of the residence visa.
According to the fines system in the ministry of the interior in the UAE, the fine for overstaying in the country after the expiry of the grace period:
25 AED per day during the first six months (180 days)
50 AED per day during the next six months
100 AED per day after more than a year.
We would like to inform you that there is no reduction in the fine if the tourist or visitor exceeds the length of stay allowed by entry permit, visit visa or tourism and considered a violation and fined by the relevant authorities in the UAE with a fine of AED 200 for the first day and AED 100 for each subsequent day.
This fee is payable at the General Directorate of Residency and Foreigners Affairs offices or at the immigration and passport offices at the airport in addition to an additional service fee of AED 100 upon departure as for residents of the UAE, the law grants them a 30-day grace period to either amend the situation, provide new sponsorship for them and their sponsors, or leave the country and no fines shall apply during that period and if the grace period ends and the resident exceeds 30 days, he will be fined AED 125 for the first day and AED 25 for each subsequent day and after six months of exceeding the stay period after the grace period and the expiry of the stay, he will be fined AED 50 for each day exceeded and after exceeding one year, the fine will rise to AED 100 for each day of delay.