Your question is unclear as to whether you have already paid for this months rent or, if you haven't paid, and the landlord expects you to pay a full months rent but have you leave by the 25th of the month. If you have already paid and have to leave by the 25th, the answer would be no, you do not owe additional rental amounts provided you have not made any other agreement to pay. If however, you haven't paid, you have an obligation to pay for the month's rent, as you have received the benefit...